METHOD FOR PRODUCING SULFATE ESTER SALT - DAIICHI KOGYO SEIYAKU KK

Title:

METHOD FOR PRODUCING SULFATE ESTER SALT

Document Type and Number:

Japanese Patent JP2720289

Kind Code:

B2

Abstract:

PURPOSE: To obtain a sulfate ester extremely little in coloration by adding phosphinic acid and/or its salt to a reaction system, when a sulfamic acid is reacted with a compound to be sulfated to produce the sulfate ester.
CONSTITUTION: When a sulfamic acid and a compound to be sulfated (alcohols, nonionic surfactant having alcoholic OH group, etc.) subjected to a sulfation reaction, phosphinic acid and/or a salt thereof are added to the reaction system to obtain a sulfate ester improved in color tone. The phosphinic acid and/or the salt thereof are preferably added in a total amount of 0.01-0.5wt.% based on the compound to be sulfated. The phosphinic acid salt (hypophosphite salt) includes the potassium salt, calcium salt, sodium salt, ammonium salt, etc., of the phosphinic acid. The compound to be sulfated includes octyl alcohol, decyl alcohol, myristyl alcohol and caster oil.

More Like This:

WO/1996/039406

NOVEL CRYSTAL FORM OF ANHYDROUS 7-([1'alpha', 5'alpha', 6'alpha']-6-AMINO-3-AZABICYCLO[3.1.0]HEX-3-YL)-6-FLUORO-1-(2,4-DIFLUOROPHENYL)-1,4-DIHYDRO-4-OXO-1,8-NAPHTHYRIDINE-3-CARBOXYLIC ACID, METHANESULFONIC ACID SALT

Inventors:

NISHIHATA TAKAO
UDA YUKIO
JINNO KAZUTO

Application Number:

JP6775994A

Publication Date:

March 04, 1998

Filing Date:

March 11, 1994

Export Citation:

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Assignee:

DAIICHI KOGYO SEIYAKU KK

International Classes:

C07C303/00; C07B45/00; C07C303/24; C07C305/02; C07C307/02; (IPC1-7): C07C305/02; C07B45/00; C07C303/24

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