Title of Invention	AN IMPROVED PROCESS FOR THE PREPARATION OF 1-NAPHTHYLAMINE 2-SULPHONIC ACID & ITS SALTS.
Abstract	An improved process for the preparation of 1-Naphthyl amine 2-sulphonic acid and its salts comprising the steps of heating the 1-Naphthyl amine 4 sulphonic acid salts with an alkali metal bi-carbonate in a solvent comprising a mixture of diphenyl ether and diphenyl at a temperature of 190-250C wherein the 1-Naphthyl amine 4 sulphonic acid salts are chosen from the group of alkali metals like sodium and potassium and the alkali metal bicarbonate chosen from the group consisting of sodium and potassium, further wherein the solvent used is selected from diphenyl ether and diphenyl mixture in various proportions from 100 to 60% of the former and 0-40% of the latter.

Title of Invention

AN IMPROVED PROCESS FOR THE PREPARATION OF 1-NAPHTHYLAMINE 2-SULPHONIC ACID & ITS SALTS.

Abstract

An improved process for the preparation of 1-Naphthyl amine 2-sulphonic acid and its salts comprising the steps of heating the 1-Naphthyl amine 4 sulphonic acid salts with an alkali metal bi-carbonate in a solvent comprising a mixture of diphenyl ether and diphenyl at a temperature of 190-250C wherein the 1-Naphthyl amine 4 sulphonic acid salts are chosen from the group of alkali metals like sodium and potassium and the alkali metal bicarbonate chosen from the group consisting of sodium and potassium, further wherein the solvent used is selected from diphenyl ether and diphenyl mixture in various proportions from 100 to 60% of the former and 0-40% of the latter.

Full Text

Documents:

96-BOM-1991-CANCELLED PAGES.pdf

96-BOM-1991-CORRESPONDENCE(IPO).pdf

96-BOM-1991-CORRESPONDENCE(RECEIVED).pdf

96-BOM-1991-FORM 2(GRANTED).pdf

96-BOM-1991-FORMS.pdf

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Patent Number

172037

Indian Patent Application Number

96/BOM/1991

PG Journal Number

42/2012

Publication Date

19-Oct-2012

Grant Date

06-May-1994

Date of Filing

05-Apr-1991

Name of Patentee

SUDARSHAN CHEMICAL INDUSTRIES LIMITED.

Applicant Address

162, WELLESLEY ROAD, PUNE

Inventors:

#	Inventor's Name	Inventor's Address
1	NAGRAJ SHYAMSUNDAR	SUDARSHAN CHEMICAL INDUSTRIES LTD., 162, WELLESLEY ROAD, PUNE-411001.
2	WASU ALWANI	SUDARSHAN CHEMICAL INDUSTRIES LTD., 162, WELLESLEY ROAD, PUNE-411001.

PCT International Classification Number

C07C15/24

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA