Process for producing unsaturated aldehyde and/or unsaturated carboxylic acid
US8969618B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2012 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/252
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A catalyst and a catalyst packing schedule are designed so that a relation between the raw material conversion rate at which the yield of the objective product becomes maximum and the raw material conversion rate at which a high and low correlation between maximum temperature of the catalyst layer present closest to a reaction gas inlet side Zin and maximum temperature of the catalyst layer present closest to a reaction gas outlet side Zout is reversed satisfies a specific condition of 0.5≦Cmax−Ccrs≦5, in which Cmax: a raw material conversion rate at which yield of the objective products becomes maximum; and Ccrs: a raw material conversion rate at which, when maximum temperature of the catalyst layer Zin is regarded as Tin, maximum temperature of the catalyst layer Zout is regarded as Tout, and the raw material conversion rate is changed, a high and low correlation between Tin and Tout is reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.