公开(公告)号：US3769338A

公开(公告)日：1973-10-30

申请号：US3769338D

申请日：1971-11-09

Applicant: ETHYL CORP

Inventor： DAGANI M ,  PEARSON T

IPC: C07C51/04 ,  C07C51/08 ,  C07C59/16

CPC classification number: C07C51/04 ,  C07C51/08 ,  C07C59/21 ,  C07C59/265

Abstract: IT IS DISCLOSED THAT CRITIC ACID AND ITS SALTS ARE PRODUCED BY REACTING A 1-HALO-2-OXO-PROPANE-3-CARBOXYLIC ACID OR A SALT OR ESTER THEREOF WITH CYANIDE TO PRODUCE A 1-HALO-2CYANO-2-HYDROXY-PROPANE-3-CARBOXYLIC ACID OR A SALT OR ESTER THEREOF, THEN CONVERTING THE 1-HALO-2-CYANO-2-HYDROXY-PROPANE-3-CARBOXYLIC ACID, ITS ESTER OR SALT TO A 1HALO-2-HYDROXY-PROPANE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE 1-HALO-2-HYDROXY-PROPANE-2,3DICARBOXYLIC ACID OR ITS ESTER OR SALT TO A PROPANE-2,3EPOXIDE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE PROPANE-1,2-EPOXIDE-2,3-DICARBOXYLIC ACID OR ITS ESTER OR SALT TO A 1-CYANO-2-HYDROXY-PROPANE-2,3DICARBOXYLIC ACID OR ITS ESTER OR SALT, THEN CONVERTING THE 1-CYANO-2-HYDROXY-PROPANE-2,3-DICARBOXYLIC ACID, ESTER OR SALT TO CITRIC ACID OR A SALT OR ESTER THEREOF. OVERALL YIELDS OF CIRTATE FROM DIKETENE ARE 60 PERCENT OR HIGHER.

公开(公告)号：US3763241A

公开(公告)日：1973-10-02

申请号：US3763241D

申请日：1971-09-09

Applicant: ETHYL CORP

Inventor： DAGANI M

IPC: C07C17/093 ,  C07F9/53 ,  C10L1/26 ,  C07F9/02

CPC classification number: C10L1/2616 ,  C07C17/093 ,  C07F9/53 ,  C07C23/10

Abstract: ORGANIC HALIDES AND TERTIARY PHOSPHINE SULFIDES ARE COPRODUCED BY HEATING A THIOL (E.G., ALKANE MONOTHIOL, ALKANE DITHIOL) WITH A TERTIARY PHOSPHINE IN ADMIXTURE WITH A CARBON TETRAHALIDE TO A SUITABLY ELEVATED TEMPERATURE.