Invention Application
US20170029434A1 PHOSPHONIC ACID CATALYST IN DEHYDRATIVE CYCLIZATION OF 5 AND 6 CARBON POLYOLS WITH IMPROVED COLOR AND PRODUCT ACCOUNTABILITY
审中-公开
具有改进颜色和产品责任性的5和6碳多元醇脱水循环中的磷酸催化剂
- Patent Title: PHOSPHONIC ACID CATALYST IN DEHYDRATIVE CYCLIZATION OF 5 AND 6 CARBON POLYOLS WITH IMPROVED COLOR AND PRODUCT ACCOUNTABILITY
- Patent Title (中): 具有改进颜色和产品责任性的5和6碳多元醇脱水循环中的磷酸催化剂
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Application No.: US15302400Application Date: 2014-12-12
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Publication No.: US20170029434A1Publication Date: 2017-02-02
- Inventor: Kenneth Stensrud , Alexandra Sanborn , Stephen Howard , Erik Hagberg
- Applicant: Archer Daniels Midland Company
- International Application: PCT/US14/70050 WO 20141212
- Main IPC: C07D493/04
- IPC: C07D493/04 ; B01J27/053 ; B01J31/02 ; B01J27/16
Abstract:
A process for preparing cyclic dehydration products from sugar alcohols is described. The process involve using a mixed-acid catalyst reaction mixture containing a reducing acid, having a pKa of about 1.0-1.5, and at least a strong Brønsted acid or a Lewis acid, having a pKa≦0, or both acids in a solution to dehydrate and ring close said sugar alcohol. Synergistically, the mixed-acid catalysis can produce greater amounts of the desired product at similar levels of compositional accountability than either of the component acid catalysts acting alone.
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