| Patent Number |
Title Of Patent |
Date Issued |
| 6414205 |
Process for the removal of MAPD from hydrocarbon streams |
July 2, 2002 |
| A process for the selective hydrogenation of the methyl acetylene and propadiene (MAPD) in a propylene rich stream is disclosed wherein the selective hydrogenation is carried out stepwise (a) first in a single pass fixed bed reactor and then (b) in a distillation column reactor containin |
| 5979177 |
Ethylene plant refrigeration system |
November 9, 1999 |
| A refrigeration system for an ethylene plant uses a low pressure demethanizer and a binary refrigerant comprising a mixture of methane and ethylene or methane and ethane. The refrigeration composition may be constant throughout the system or separators may be used to divide the refri |
| 5925799 |
Catalytic distillation and hydrogenation of heavy unsaturates in an olefins plant |
July 20, 1999 |
| In an olefins plant for the production and recovery of ethylene and propylene, the hydrogenation of the C.sub.2 acetylenes, the C.sub.3 acetylenes and dienes and the C.sub.4 and heavier acetylenes, dienes and olefins and the selective separation of the resulting products is carried o |
| 5679241 |
Olefin plant recovery system employing catalytic distillation |
October 21, 1997 |
| The C.sub.2 to C.sub.5 and heavier acetylenes and dienes in a thermally cracked feed stream are hydrogenated without significantly hydrogenating the C.sub.2 and C.sub.3 olefins. Additionally, the C.sub.4 and heavier olefins may be hydrogenated. Specifically, the cracked gas feed in an |
| 5647972 |
Low pressure chilling train for olefin plants |
July 15, 1997 |
| A method of processing a cracked gas feedstream containing hydrogen and C.sub.1 to C.sub.6 and heavier hydrocarbons is described using a relatively low pressure as compared to conventional cryogenic separation processes. At pressures below 27 bars, the feedstream is dried and cooled |
| 5502971 |
Low pressure recovery of olefins from refinery offgases |
April 2, 1996 |
| A low pressure cryogenic process is disclosed for recovering C.sub.2 and heavier hydrocarbons and particularly olefins from a refinery offgas containing hydrogen, methane, nitrogen oxide in addition to the C.sub.2 and heavier hydrocarbons. The conventional high pressures are eliminated |
