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

(12) PATENT APPLICATION PUBLICATION (21) Application No.6253/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :17/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "PROCESS FOR THE PREPARATION OF AN ALKANEDIOL AND DIALKYL CARBONATE"
(51) International classification :C07C 68/06 (71)Name of Applicant :
(31) Priority Document No :06110249.7
1)SHELL INTERNATIONALE RESEARCH
(32) Priority Date :22/02/2006 MAATSCHAPPIJ B.V.
(33) Name of priority country
:EUROPEAN
UNION
Address of Applicant :CAREL VAN BYLANDTLAAN 30,
NL-2596 HR THE HAGUE, THE NETHERLANDS. Netherlands
(86) International Application No :PCT/EP2007/051590 (72)Name of Inventor :
Filing Date
:20/02/2007
1)VAN DER HEIDE EVERT)
(87) International Publication No :WO 2007/096346 2)NISBET TIMOTHY MICHAEL
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
A process for the preparation of an alkanediol and a dialkyi carbonate is provided, which process comprises: (a) contacting an
alkylene carbonate with an alkanol feedstock under transesterification conditions in a reactive distillation column to obtain an
upwardly moving stream comprising dialkyi carbonate and the alkanol and a downwardly moving stream comprising the alkanediol;
(b) recovering the alkanediol at the bottom of the column; (c) withdrawing a dialkyi carbonate- and alkanol-containing product stream
at the upper part of the column, which upper part is below the top of the column; and (d) removing lower-boiling compounds at the
top of the column.
No. of Pages : 14 No. of Claims : 6
The Patent Office Journal 24/10/2008 25758