Invention Grant
- Patent Title: Process to produce alkenoic acid esters from lactones
- Patent Title (中): 从内酯生产烯酸酯的方法
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Application No.: US13722241Application Date: 2012-12-20
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Publication No.: US09328052B2Publication Date: 2016-05-03
- Inventor: Anna Maria Cornelia Francisca Castelijns
- Applicant: Anna Maria Cornelia Francisca Castelijns
- Applicant Address: NL Heerlen
- Assignee: DSM IP ASSETS B.V.
- Current Assignee: DSM IP ASSETS B.V.
- Current Assignee Address: NL Heerlen
- Agency: Miles & Stockbridge PC
- Priority: EP11194500 20111220
- Main IPC: C07C67/38
- IPC: C07C67/38 ; C07C67/30 ; C07C67/03 ; C07C67/36 ; C07C51/09 ; B01J38/60 ; B01J38/62 ; B01J29/90 ; B01J21/20 ; B01J21/12 ; B01J29/70
Abstract:
This invention relates to a process for the preparation of alkenoic acid esters comprising contacting a lactone with an alcohol and an acidic heterogeneous catalyst, characterized in that the process is carried out in the presence of at least 20 ppm of an acid having a pKa of 5 or less, relative to the amount of the lactone. The presence of at least 20 ppm of an acid having a pKa of 5 or less may stabilize the catalyst during the reaction and may also be used for reactivating an acidic heterogeneous catalyst. The improved yield advantageously allows energy conservation.
Public/Granted literature
- US20130158286A1 PROCESS TO PRODUCE ALKENOIC ACID ESTERS FROM LACTONES Public/Granted day:2013-06-20
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