Process for the production of propylene glycol from lactate ester
US10532967B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Oct 17, 2017 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Oct 17, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of propylene glycol from a lactate ester is disclosed. The process comprises supplying a feed comprising a C3-6 alkyl lactate ester. The feed is contacted with a stream of hydrogen containing gas and subjected to hydrogenation in the vapour phase in the presence of a catalyst at a temperature of from about 130° C. to about 185° C., a pressure of from about 20 bar to about 60 bar, and a weight hourly space velocity greater than about 0.3 h−1. The catalyst is a reduced copper catalyst selected from copper alumina, optionally comprising manganese, copper chromite, copper zinc oxide and Raney copper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.