Process for preparing 1,2-benzoisothiazolin-3-ones

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United States of America Patent

PATENT NO 9067899
APP PUB NO 20140316141A1
SERIAL NO

13868297

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Abstract

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Sodium sulfide hydrate is at least partially dehydrated by heating with N-methyl 2-pyrrolidone. 2-Chlorobenzamide is added to the mixture which is heated further. The mixture is cooled and treated with aqueous hydrogen peroxide to give the sodium salt of 1,2-benzisothiazolin-3-one in good yield. Acidification if desired gives rise to the free 1,2-benzisothiazolin-3-one.

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Patent Owner(s)

Patent OwnerAddress
TITAN CHEMICALS LIMITED3076 SIR FRANCIS DRAKE'S HIGHWAY PO BOX 3463 ROAD TOWN TORTOLA VG1110

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Berg, Carsten Borre, DK 9 8
Marsh, Ian Roger Surrey, GB 12 156
Singh, Sangita Surrey, GB 5 2

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