WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1996005208) TRANSESTERIFICATION PROCESS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1996/005208    International Application No.:    PCT/GB1995/001883
Publication Date: 22.02.1996 International Filing Date: 09.08.1995
Chapter 2 Demand Filed:    08.03.1996    
IPC:
C07F 9/09 (2006.01), C07F 9/11 (2006.01), C07F 9/12 (2006.01)
Applicants: FMC CORPORATION (UK) LIMITED [GB/GB]; Process Additives Division, Tenax Road, Trafford Park, Manchester M17 1WT (GB) (For All Designated States Except US).
HILL, Jonathan, Simon [GB/GB]; (GB) (For US Only)
Inventors: HILL, Jonathan, Simon; (GB)
Agent: HAMILTON, Ray; FMC Corporation (UK) Limited, Process Additives Division, Tenax Road, Trafford Park, Manchester M17 1WT (GB)
Priority Data:
9416334.2 10.08.1994 GB
Title (EN) TRANSESTERIFICATION PROCESS
(FR) PROCEDE DE TRANSESTERIFICATION
Abstract: front page image
(EN)The production of esters of oxyacids of pentavalent phosphorus by transesterification of such an ester with an alcohol or phenol is carried out using a basic catalyst which has a base strength of less than (11). Such catalysts give improved conversions compared to more strongly basic catalysts. The preferred processes comprise the conversion of triphenyl phosphate to alkyl/phenyl phosphates by reaction with an aliphatic alcohol in the presence of a medium strength hard base such as potassium carbonate or potassium fluoride.
(FR)La production d'esters d'oxyacides de phosphore pentavalent par transestérification d'un tel ester avec un alcool ou un phénol est effectuée au moyen d'un catalyseur basique dont la force de la base est inférieure à 11. On obtient avec de tels catalyseurs de meilleures conversions qu'avec des catalyseurs dont la base est plus forte. Les procédés préférés comprennent la conversion de triphényl-phosphate en alkyl/phényl-phosphates par réaction avec un alcool aliphatique en présence d'une base dure de force moyenne telle que du carbonate de potassium ou du fluorure de potassium.
Designated States: AU, CA, CN, CZ, HU, JP, MX, RU, US.
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)