| Patent Number |
Title Of Patent |
Date Issued |
| 6600083 |
Para-xylene production process integrating pressure swing adsorption and crystallization |
July 29, 2003 |
| A pressure swing adsorption process to separate para-xylene and ethylbenzene from C.sub.8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and is operated isothermally in the vapor phase at elevated temperatures and pressures is |
| 6565653 |
Energy efficient process for producing high purity paraxylene |
May 20, 2003 |
| The invention is a novel energy efficient process to produce high purity paraxylene from a feed comprising at least 55 to 60 wt % paraxylene, wherein a first portion of high purity paraxylene product is obtained in a first crystallization step at about 10.degree. F. to about 55.degree. F |
| 6124517 |
Olefin purification by adsorption of acetylenics and regeneration of adsorbent |
September 26, 2000 |
| Processes using heterogeneous adsorbents are disclosed for purification of relatively impure unsaturated hydrocarbons such as olefins, which are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by passing a feed stream, containing acetylenic impurities, and, |
| 6080905 |
Olefin purification by adsorption of acetylenics and regeneration of adsorbent |
June 27, 2000 |
| Processes using heterogeneous adsorbents are disclosed for purification of olefins such as are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by passing a stream of olefin having from 2 to about 8 carbon atoms, containing acetylenic impurities having the same |
| 5863420 |
Unsaturated hydrocarbon separation and recovery process |
January 26, 1999 |
| A process disclosed for the separation, purification and recovery of an unsaturated hydrocarbon from its mixture with at least one other material using a facilitated transport liquid membrane system. |
