Process for the production of cyclohexanedimethanol
US5395986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is described for the production of cyclohexanedimethanol having a trans-:cis-isomer ratio greater than about 1:1 by hydrogenation of a dialkyl (e.g. dimethyl) cyclohexanedicarboxylate having a trans-:cis-isomer ratio less than about 1:1 which comprises: PA1 (a) providing a hydrogenation zone containing a charge of a granular heterogeneous ester hydrogenation catalyst; PA1 (b) supplying to the hydrogenation zone a vaporous feed stream containing hydrogen and a hydrogenarable material comprising a dialkyl cyclohexanedicarboxylate at an inlet temperature which is above its dew point of the mixture; PA1 (c) maintaining the hydrogenation zone under temperature and pressure conditions which are conducive to effecting hydrogenation of esters; PA1 (d) passing the vaporous feed stream through the hydrogenation zone; and PA1 (e) recovering from the hydrogenation zone a product stream containing cyclohexanedimethanol having a trans-:cis-isomer ratio greater than 1:1. In this process it is preferred to use dimethyl 1,4-cyclohexanedicarboxylate to produce 1,4-cyclohexanedimethanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.