continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6587/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :29/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "PROCESS FOR THE PRODUCTION OF ALKYLENE CARBONATE AND USE OF ALKYLENE
CORBONATE THUS PRODUCED IN THE MACNUFACTURE OF AN ALKANE DIOL AND A DIALKYL CARBONATE"
(51) International classification :C07D 317/36
(31) Priority Document No :06110999.7
(32) Priority Date :13/03/2006
(33) Name of priority country
:EUROPEAN
(86) International Application No
Filing Date
(87) International Publication No
(61) Patent of Addition to Application
Number
Filing Date
(62) Divisional to Application Number
Filing Date
(71)Name of Applicant :
1)SHELL INTENATIONALE RESEARCH
MAATSCHAPPIL B.V.
Address of Applicant :CAREL VAN BYLANDTLAAN 30,
UNION
2596 HR THE HAGUE, THE NETHELANDS. Netherlands
:PCT/EP2007/052270 (72)Name of Inventor :
:12/03/2007
1)VAN DER HEIDE EVERT
:WO 2007/104730 2)VAN KESSEL GERARDUS MARTINUS MARIS
A1
3)NISBET TIMOTHY MICHAEL
:NA
:NA
:NA
:NA
(57) Abstract :
An alkylene carbonate is produced by the reaction of an alkylene oxide with carbon dioxide in the presence of a phosphonium catalyst
in a process in which (a) the alkylene oxide, carbon dioxide and the phosphonium catalyst are continuously introduced into a reaction
zone from which a product stream containing alkylene carbonate and used phosphonium catalyst is withdrawn, (b) alkylene carbonate
and a stream containing used phosphonium catalyst are separated from the product stream, (c) the alkylene carbonate, separated in
step (b), is recovered as product, (d) at least a part of the stream containing used phosphonium catalyst is subjected to purification, to
obtain purified phosphonium catalyst, and (e) purified phosphonium catalyst is recycled to the reaction zone, optionally in
combination with another part of the stream containing used phosphonium catalyst.
No. of Pages : 17 No. of Claims : 10
The Patent Office Journal 24/10/2008 26076