Title of Invention	"A PROCESS OF PREPARING A COOLANT"
Abstract	A process of preparing coolant which comprising: - absorbing hydrogen chloride gas in circulating water to produce hydrochloric acid solution, - reacting said solution with calcium carbonate to get calcium chloride solution, wherein the concentration of calcium chloride ranges from 0.05 to 75% w/v and filtered, - adding corrosion inhibitors 0.1 to 10% w/w of coolant, - and additives 0.1 to 10% w/w of coolant to stabilize coolant.

Title of Invention

"A PROCESS OF PREPARING A COOLANT"

Abstract

A process of preparing coolant which comprising: - absorbing hydrogen chloride gas in circulating water to produce hydrochloric acid solution, - reacting said solution with calcium carbonate to get calcium chloride solution, wherein the concentration of calcium chloride ranges from 0.05 to 75% w/v and filtered, - adding corrosion inhibitors 0.1 to 10% w/w of coolant, - and additives 0.1 to 10% w/w of coolant to stabilize coolant.

Full Text	This invention relates to coolant and its Process of preparing. Background of the Invention: The conventional coolants mainly contain ethylene glycol besides water, corrosion inhibitors and additives, hi these coolants, ethylene glycol is costlier and has many disadvantages such as: - narrower operating temperature range i.e. -13.5 to 103°C when the ratio of the ethylene glycol and water is 1:3. - less efficient in heat removing from engine cylindrical block, when it is diluted at the ratio towards higher concentration to avoid freezing. - on addition with ordinary water, which contains soluble salts and suspended impurities; this adversely affects the cooling system by depositing heavy scaling on heated parts as compared to the remaining cold parts of the system. - fire hazardous at high temperature. - when the coolant is in spent conditions, it is not environment friendly and should not be drained freely without treating. - the main content, ethylene glycol in hot condition is acidic; so, there is a need to add more anti-corrosive inhibitors. - it evaporates over the time and usage. The objects and summary of the Invention: The object of this invention is to obviate the above disadvantages and to provide an environment friendly coolant and its method of preparation; which can operate at wider range of temperature and has excellent efficiency in heat removing from heated parts of the engine and is not fire hazardous. To achieve the said objective, this invention provides a coolant comprising: - calcium chloride aqueous solution having concentration 0.05 to 75% w/v, - corrosion inhibitors 0.1 to 10% w/w of coolant, - and additives 0.1 to 10% w/w of coolant for stable coolant. i The aqueous solution of calcium chloride is blended with corrosion inhibitors as such or dissolved in water, to protect from any type of possible corrosion of various metals parts and rubber parts too, involved in cooling system. The selection of corrosion inhibitors is made from passivating inhibitors, precipitating inhibitors and adsorption inhibitors. Examples of these corrosion inhibitors are: sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercaptobenzothiazole and tolytriazole; and are 0.1 to 10% w/w of coolant. Various additives are also added to above calcium chloride solution containing corrosion inhibitors; to stabilize the inhibitors and the metal salts which are corrosion by-product, in the coolant. The additive are dispersant (sodium tri-polyphosphate), sanitizer (sodium dichlorocyanurate), pH stabilizer (sodium borate), pH stabilizer, sanitizer acid neutralizer (sodium hydroxide), anti foaming agent (silicons), foam formation suppressant (polyalcohol), dyes and perfumes for leak detection; and are 0.1 to 10% w/w of coolant. The presence of calcium chloride 0.05 to 75% w/v in coolant affects on its freezing point and boiling points. The pH of CaCl2 is between 6 to 8. This invention also includes a process for preparing coolant which comprising: - absorbing hydrogen chloride gas in a circulating water to produce hydrochloric acid solution, - reacting said solution with calcium carbonate to get calcium chloride solution., wherein the concentration of calcium chloride ranges from 0.05 to 75% w/v and filtered, - adding corrosion inhibitors 0.1 to 10% w/w of coolant, - and additive 0.1 to 10% w/w of coolant to stabilize coolant. In the above process, calcium carbonates is lime-stone or marble slurry or their mixture. In the above process, calcium chloride can also be directly used. The pH of CaC\2 is adjusted between 6 to 8. The corrosion inhibitors are selected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto-benzothiazole and tolytriazole; and are 0.1 to 10% w/w of coolant. The additives are selected from known additives such as sodium tri-polyphosphate, sodium dichlorocyanurate, sodium borate, sodium hydroxide, silicons, polyalcohol, dyes and perfumes; and are 0.1 to 10% w/w of coolant. The invention will now be described with reference to the foregoing examples: EXAMPLE-1 Hydrogen chloride gas is passed through circulating water to obtain hydrochloric acid which is reacted with lime stone to produce aqueous calcium chloride solution. This calcium chloride solution is then neutralize with calcium hydroxide to adjust pH at 7. The concentration of this solution is adjusted to 10%w/v and filtered. To above 1000 ml. aqueous neutral solution of calcium chloride (10%); 3gms. sodium moybdate, 2gms. sodium nitrate, 1gm. sodium sulphite and Igm. sodium tolytriazole as corrosion inhibitors and 2.5gms sodium hydroxide, 0.05gms.Green dye and 0.05gms. rose perfume as additives are added after dissolving in water. Example 2 To 1000 ml. aqueous solution of calcium chloride (10%) ; 3gms. sodium moybdate, 2gms. sodium nitrate, 1gm. sodium sulphite and Igm. sodium tolytriazole as corrosion inhibitors and 2.5gms sodium hydroxide, O.OSgms. Green dye and 0.05gms. rose perfume as additives are adq!ed. We Claim: 1. A process of preparing coolant which comprising: - absorbing hydrogen chloride gas in circulating water to produce hydrochloric acid solution, - reacting said solution with calcium carbonate to get calcium chloride solution, wherein the concentration of calcium chloride ranges from 0.05 to 75% w/v and filtered, - adding corrosion inhibitors 0.1 to 10% w/w of coolant, - and additives 0.1 to 10% w/w of coolant to stabilize coolant. 2. A process as claimed in claim 1, wherein calcium carbonate is lime stone or marble slurry or their mixture. 3. A process as claimed in claim 1, wherein calcium chloride can be directly used. 4. A process as claimed in claim 1, wherein corrosion inhibitors are selected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and tolytriazole. 5. A process as claimed in claim 1, wherein additives are selected from known additives such as sodium tri-polyphosphate, sodium dichlorocyanurate, sodium borate, sodium hydroxide,, silicons, polyalcohol, dyes and perfumes. 6. A process as claimed in claim 1, wherein pH of the CaC^ is adjusted between 6 to 8. 7. A coolant comprising: - calcium chloride aqueous solution having concentration 0.05 to 75% w/v, - corrosion inhibitors 0. 1 to 10% w/w of coolant, and additives 0. 1 to 10% w/w of coolant for stable coolant. 8. A coolant as claimed in claim 7, wherein corrosion inhibitors are seletected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and tolytriazole. 9. A coolant as claimed in claim 7, wherein, additives are selected from known additives such as sodium tri-polyphosphate., sodium dichlorocyanurate, sodium borate, sodium hydroxide, silicons, polyalcohol, dyes and perfumes. 10. A coolant as claimed in claim 7, wherein pH of CaC\2 is between 6 to 8. 11. A process for preparing coolant substantially as herein described and exemplified. 12. A coolant substantially as herein described and exemplified. We Claim: 1. A process of preparing coolant which comprising: - absorbing hydrogen chloride gas in circulating water to produce hydrochloric acid solution, - reacting said solution with calcium carbonate to get calcium chloride solution, wherein the concentration of calcium chloride ranges from 0.05 to 75% w/v and filtered, - adding corrosion inhibitors 0.1 to 10% w/w of coolant, - and additives 0.1 to 10% w/w of coolant to stabilize coolant. 2. A process as claimed in claim 1, wherein calcium carbonate is lime stone or marble slurry or their mixture. 3. A process as claimed in claim 1, wherein calcium chloride can be directly used. 4. A process as claimed in claim 1, wherein corrosion inhibitors are selected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and tolytriazole. 5. A process as claimed in claim 1, wherein additives are selected from known additives such as sodium tri-polyphosphate, sodium dichlorocyanurate, sodium borate, sodium hydroxide,, silicons, polyalcohol, dyes and perfumes. 6. A process as claimed in claim 1, wherein pH of the CaC^ is adjusted between 6 to 8. 7. A coolant comprising: - calcium chloride aqueous solution having concentration 0.05 to 75% w/v, - corrosion inhibitors 0. 1 to 10% w/w of coolant, and additives 0. 1 to 10% w/w of coolant for stable coolant. 8. A coolant as claimed in claim 7, wherein corrosion inhibitors are seletected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and tolytriazole. 9. A coolant as claimed in claim 7, wherein, additives are selected from known additives such as sodium tri-polyphosphate., sodium dichlorocyanurate, sodium borate, sodium hydroxide, silicons, polyalcohol, dyes and perfumes. 10. A coolant as claimed in claim 7, wherein pH of CaC\2 is between 6 to 8. 11. A process for preparing coolant substantially as herein described and exemplified. 12. A coolant substantially as herein described and exemplified.

Full Text

This invention relates to coolant and its Process of preparing. Background of the Invention:
The conventional coolants mainly contain ethylene glycol besides water, corrosion inhibitors and additives, hi these coolants, ethylene glycol is costlier and has many disadvantages such as:
- narrower operating temperature range i.e. -13.5 to 103°C when
the ratio of the ethylene glycol and water is 1:3.
- less efficient in heat removing from engine cylindrical block,
when it is diluted at the ratio towards higher concentration to
avoid freezing.
- on addition with ordinary water, which contains soluble salts and
suspended impurities; this adversely affects the cooling system by
depositing heavy scaling on heated parts as compared to the
remaining cold parts of the system.
- fire hazardous at high temperature.
- when the coolant is in spent conditions, it is not environment friendly
and should not be drained freely without treating.
- the main content, ethylene glycol in hot condition is acidic; so, there
is a need to add more anti-corrosive inhibitors.
- it evaporates over the time and usage.
The objects and summary of the Invention:
The object of this invention is to obviate the above disadvantages and to provide an environment friendly coolant and its method of preparation; which can operate at wider range of temperature and has excellent efficiency in heat removing from heated parts of the engine and is not fire hazardous.

To achieve the said objective, this invention provides a coolant comprising:
- calcium chloride aqueous solution having concentration 0.05 to 75%
w/v,
- corrosion inhibitors 0.1 to 10% w/w of coolant,
- and additives 0.1 to 10% w/w of coolant for stable coolant.
i
The aqueous solution of calcium chloride is blended with corrosion inhibitors as such or dissolved in water, to protect from any type of possible corrosion of various metals parts and rubber parts too, involved in cooling system.
The selection of corrosion inhibitors is made from passivating inhibitors, precipitating inhibitors and adsorption inhibitors. Examples of these corrosion inhibitors are: sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercaptobenzothiazole and tolytriazole; and are 0.1 to 10% w/w of coolant.
Various additives are also added to above calcium chloride solution containing corrosion inhibitors; to stabilize the inhibitors and the metal salts which are corrosion by-product, in the coolant. The additive are dispersant (sodium tri-polyphosphate), sanitizer (sodium dichlorocyanurate), pH stabilizer (sodium borate), pH stabilizer, sanitizer acid neutralizer (sodium hydroxide), anti foaming agent (silicons), foam formation suppressant (polyalcohol), dyes and perfumes for leak detection; and are 0.1 to 10% w/w of coolant.
The presence of calcium chloride 0.05 to 75% w/v in coolant affects on its freezing point and boiling points.
The pH of CaCl2 is between 6 to 8.

This invention also includes a process for preparing coolant which comprising:
- absorbing hydrogen chloride gas in a circulating water to produce
hydrochloric acid solution,
- reacting said solution with calcium carbonate to get calcium chloride
solution., wherein the concentration of calcium chloride ranges from
0.05 to 75% w/v and filtered,
- adding corrosion inhibitors 0.1 to 10% w/w of coolant,
- and additive 0.1 to 10% w/w of coolant to stabilize coolant.
In the above process, calcium carbonates is lime-stone or marble slurry or their mixture.
In the above process, calcium chloride can also be directly used. The pH of CaC\2 is adjusted between 6 to 8.
The corrosion inhibitors are selected from known inhibitors such as sodium molybdate, sodium tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate, sodium sulfite, sodium silicate, mercapto-benzothiazole and tolytriazole; and are 0.1 to 10% w/w of coolant.
The additives are selected from known additives such as sodium tri-polyphosphate, sodium dichlorocyanurate, sodium borate, sodium hydroxide, silicons, polyalcohol, dyes and perfumes; and are 0.1 to 10% w/w of coolant.
The invention will now be described with reference to the foregoing examples:
EXAMPLE-1
Hydrogen chloride gas is passed through circulating water to obtain hydrochloric acid which is reacted with lime stone to produce aqueous calcium

chloride solution. This calcium chloride solution is then neutralize with calcium hydroxide to adjust pH at 7. The concentration of this solution is adjusted to 10%w/v and filtered.
To above 1000 ml. aqueous neutral solution of calcium chloride (10%); 3gms. sodium moybdate, 2gms. sodium nitrate, 1gm. sodium sulphite and Igm. sodium tolytriazole as corrosion inhibitors and 2.5gms sodium hydroxide, 0.05gms.Green dye and 0.05gms. rose perfume as additives are added after dissolving in water.
Example 2
To 1000 ml. aqueous solution of calcium chloride (10%) ; 3gms. sodium moybdate, 2gms. sodium nitrate, 1gm. sodium sulphite and Igm. sodium tolytriazole as corrosion inhibitors and 2.5gms sodium hydroxide, O.OSgms. Green dye and 0.05gms. rose perfume as additives are adq!ed.

We Claim:
1. A process of preparing coolant which comprising:
- absorbing hydrogen chloride gas in circulating water to produce
hydrochloric acid solution,
- reacting said solution with calcium carbonate to get calcium chloride
solution, wherein the concentration of calcium chloride ranges from
0.05 to 75% w/v and filtered,
- adding corrosion inhibitors 0.1 to 10% w/w of coolant,
- and additives 0.1 to 10% w/w of coolant to stabilize coolant.

2. A process as claimed in claim 1, wherein calcium carbonate is lime
stone or marble slurry or their mixture.
3. A process as claimed in claim 1, wherein calcium chloride can be directly
used.
4. A process as claimed in claim 1, wherein corrosion inhibitors are selected
from known inhibitors such as sodium molybdate, sodium tolytriazole,
sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate,
sodium sulfite, sodium silicate, mercapto- benzothiazole and
tolytriazole.
5. A process as claimed in claim 1, wherein additives are selected from
known additives such as sodium tri-polyphosphate, sodium
dichlorocyanurate, sodium borate, sodium hydroxide,, silicons,
polyalcohol, dyes and perfumes.

6. A process as claimed in claim 1, wherein pH of the CaC^ is adjusted
between 6 to 8.
7. A coolant comprising:

- calcium chloride aqueous solution having concentration 0.05 to 75%
w/v,
- corrosion inhibitors 0. 1 to 10% w/w of coolant,
and additives 0. 1 to 10% w/w of coolant for stable coolant.
8. A coolant as claimed in claim 7, wherein corrosion inhibitors are
seletected from known inhibitors such as sodium molybdate, sodium
tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium
benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and
tolytriazole.
9. A coolant as claimed in claim 7, wherein, additives are selected from
known additives such as sodium tri-polyphosphate., sodium
dichlorocyanurate, sodium borate, sodium hydroxide, silicons,
polyalcohol, dyes and perfumes.
10. A coolant as claimed in claim 7, wherein pH of CaC\2 is between 6 to 8.
11. A process for preparing coolant substantially as herein described and
exemplified.
12. A coolant substantially as herein described and exemplified.

We Claim:
1. A process of preparing coolant which comprising:
- absorbing hydrogen chloride gas in circulating water to produce
hydrochloric acid solution,
- reacting said solution with calcium carbonate to get calcium chloride
solution, wherein the concentration of calcium chloride ranges from
0.05 to 75% w/v and filtered,
- adding corrosion inhibitors 0.1 to 10% w/w of coolant,
- and additives 0.1 to 10% w/w of coolant to stabilize coolant.

2. A process as claimed in claim 1, wherein calcium carbonate is lime
stone or marble slurry or their mixture.
3. A process as claimed in claim 1, wherein calcium chloride can be directly
used.
4. A process as claimed in claim 1, wherein corrosion inhibitors are selected
from known inhibitors such as sodium molybdate, sodium tolytriazole,
sodium phosphate, sodium nitrate, sodium nitrite, sodium benzoate,
sodium sulfite, sodium silicate, mercapto- benzothiazole and
tolytriazole.
5. A process as claimed in claim 1, wherein additives are selected from
known additives such as sodium tri-polyphosphate, sodium
dichlorocyanurate, sodium borate, sodium hydroxide,, silicons,
polyalcohol, dyes and perfumes.

6. A process as claimed in claim 1, wherein pH of the CaC^ is adjusted
between 6 to 8.
7. A coolant comprising:

- calcium chloride aqueous solution having concentration 0.05 to 75%
w/v,
- corrosion inhibitors 0. 1 to 10% w/w of coolant,
and additives 0. 1 to 10% w/w of coolant for stable coolant.
8. A coolant as claimed in claim 7, wherein corrosion inhibitors are
seletected from known inhibitors such as sodium molybdate, sodium
tolytriazole, sodium phosphate, sodium nitrate, sodium nitrite, sodium
benzoate, sodium sulfite, sodium silicate, mercapto- benzothiazole and
tolytriazole.
9. A coolant as claimed in claim 7, wherein, additives are selected from
known additives such as sodium tri-polyphosphate., sodium
dichlorocyanurate, sodium borate, sodium hydroxide, silicons,
polyalcohol, dyes and perfumes.
10. A coolant as claimed in claim 7, wherein pH of CaC\2 is between 6 to 8.
11. A process for preparing coolant substantially as herein described and
exemplified.
12. A coolant substantially as herein described and exemplified.

Documents:

1103-del-2003-abstract.pdf

1103-del-2003-claims.pdf

1103-del-2003-correspondence others.pdf

1103-del-2003-correspondence-po.pdf

1103-del-2003-description (complete).pdf

1103-del-2003-form-1.pdf

1103-del-2003-form-19.pdf

1103-del-2003-form-2.pdf

1103-del-2003-form-3.pdf

1103-del-2003-form-4.pdf

1103-del-2003-form-5.pdf

1103-del-2003-gpa.pdf

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Patent Number

226194

Indian Patent Application Number

1103/DEL/2003

PG Journal Number

01/2009

Publication Date

02-Jan-2009

Grant Date

10-Dec-2008

Date of Filing

04-Sep-2003

Name of Patentee

ASHOK KUMAR TIWARI

Applicant Address

D-3/7, SECTOR-15, ROHINI, NEW DELHI, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	ASHOK KUMAR TIWARI	D-3/7, SECTOR-15, ROHINI, NEW DELHI, INDIA.
2	TARUN KUMAR TIWARI	D-3/7, SECTOR-15, ROHINI, NEW DELHI, INDIA.
3	PADAM KUMAR TIWARI	D-3/7, SECTOR-15, ROHINI, NEW DELHI, INDIA.

PCT International Classification Number

C01F 11/18

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA