Process for removing polymeric by-products from acetylene hydrogenation product
US6015933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1998 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Jul 15, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process to remove polymeric by-products from the product of an acetylene selective hydrogenation reactor has been developed. The product is generated by introducing hydrogen and a liquid hydrocarbon stream containing largely butadiene and some acetylenes to a reactor containing a catalyst effective for the selective hydrogenation of acetylenes. The product contains at least hydrogen, butadiene, and polymeric by-products. The pressure of the product is reduced and the product cooled. The cooled product is conducted to a low pressure flash drum to produce a hydrogen enriched stream and a butadiene and polymeric by-product-enriched stream. The hydrogen-enriched stream is removed. The butadiene and polymeric by-product is passed to a knockout drum to produce a stream enriched in butadiene and polymeric by-products having less than about 12 carbon atoms and a stream enriched in polymeric by-products having about 12 or more carbon atoms. The stream enriched in polymeric by-products having about 12 or more carbon atoms is removed from the process. Polymeric by-products containing less than about 12 carbon atoms may be removed from the remaining stream by conducting a solvent and the str…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.