MY136121A - Method for removal of mw176 cyclic acetal and solid acid catalyzed reactive stripping of impurities formed during the production of 1, 3-propanediol - Google Patents
Method for removal of mw176 cyclic acetal and solid acid catalyzed reactive stripping of impurities formed during the production of 1, 3-propanediolInfo
- Publication number
- MY136121A MY136121A MYPI20034122A MY136121A MY 136121 A MY136121 A MY 136121A MY PI20034122 A MYPI20034122 A MY PI20034122A MY 136121 A MY136121 A MY 136121A
- Authority
- MY
- Malaysia
- Prior art keywords
- propanediol
- cyclic acetal
- pdo
- production
- mixture
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
THIS INVENTION DESCRIBES IMPROVEMENTS UPON A PROCESS FOR THE PRODUCTION OF 1,3-PROPANEDIOL (PDO) WHEREIN AN AQUEOUS SOLUTION OF 3-HYDROXYPROPANAL (HPA) IS FORMED AND THE HPA IS SUBJECTED TO HYDROGENATION TO PRODUCE A CRUDE PDO MIXTURE. ONE IMPROVEMENT ON THIS PROCESS COMPRISES TREATING THE CRUDE PDO MIXTURE WITH AN ACIDIC ZEOLITE, AN ACID FORM CATION EXCHANGE RESIN, OR A SOLUBLE ACID TO CONVERT THE MW176 CYCLIC ACETAL TO MORE VOLATILE MATERIALS WHICH CAN BE EASILY SEPARATED FROM PDO BY DISTILLATION. ANOTHER IMPROVEMENT INVOLVES REMOVING WATER FROM THE CRUDE 1,3-PROPANEDIOL MIXTURE, CONTACTING THE RESULTING MIXTURE WITH A SOLID ACID PURIFIER AT A TEMPERATURE OF FROM ABOUT 50 TO ABOUT 250 °C TO CONVERT THE MW 132 CYCLIC ACETAL TO MORE VOLATILE CYCLIC ACETALS, AND SEPARATING THE MORE VOLATILE CYCLIC ACETALS FROM THE 1,3-PROPANEDIOL BY DISTILLATION OR GAS STRIPPING.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42309702P | 2002-11-01 | 2002-11-01 | |
US42314002P | 2002-11-01 | 2002-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
MY136121A true MY136121A (en) | 2008-08-29 |
Family
ID=36114224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI20034122 MY136121A (en) | 2002-11-01 | 2003-10-29 | Method for removal of mw176 cyclic acetal and solid acid catalyzed reactive stripping of impurities formed during the production of 1, 3-propanediol |
Country Status (4)
Country | Link |
---|---|
AR (1) | AR041870A1 (en) |
MY (1) | MY136121A (en) |
RU (1) | RU2320634C2 (en) |
TW (1) | TWI280957B (en) |
-
2003
- 2003-10-29 MY MYPI20034122 patent/MY136121A/en unknown
- 2003-10-30 RU RU2005116688/04A patent/RU2320634C2/en not_active IP Right Cessation
- 2003-10-30 TW TW92130164A patent/TWI280957B/en not_active IP Right Cessation
- 2003-10-30 AR ARP030103966 patent/AR041870A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
TWI280957B (en) | 2007-05-11 |
AR041870A1 (en) | 2005-06-01 |
RU2005116688A (en) | 2006-02-27 |
TW200407284A (en) | 2004-05-16 |
RU2320634C2 (en) | 2008-03-27 |
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