专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明专利

AU2315092A SELECTIVE SEALING OF DEFECTIVE GAS SEPARATION HOLLOW FIBERS 未知
公开(公告)号：AU2315092A
公开(公告)日：1993-06-07
申请号：AU2315092
申请日：1992-04-10
申请人： HOECHST CELANESE CORPORATION
发明人： MICHAEL HAUBS , WALTER HASSINGER
IPC分类号： B01D53/22 , B01D65/10 , B32B43/00 , C01B13/02
摘要： A process for improving the gas separation efficiency of a bundle or module of hollow gas separation fibers by selectively sealing defective fibers without sealing good fibers through which a gas A passes significantly more readily than a gas B. At the beginning of this process the same atmosphere containing A and B is in the interior and at exterior surfaces of said fibers. A curable sealant is applied to a first open end of the fibers, the opposite end of the fibers is blocked, and the partial pressure of A at the exterior fiber surfaces is increased. The resulting pressure build-up inside the non-defective fibers prevents them from being penetrated significantly by the sealant. When the tip of the fibers is cut cleanly away, the good fibers are open but the defective fibers are plugged with sealant.

3. 发明专利

ES2032294T3 未知
公开(公告)号：ES2032294T3
公开(公告)日：1993-02-01
申请号：ES87302719
申请日：1987-03-30
申请人： CELANESE CORPORATION
发明人： MAURER, CHARLES J.
IPC分类号： C07C67/08 , C07C69/82 , C08G63/78 , C08G63/89
摘要： The invention provides a process for the preparation of a polyester oligomer capable of being further polymerized to a high polymer wherein a glycol-dicarboxylic acid ester feed is treated in a secondary esterification zone under conditions such that the partial vapor pressures of water and glycol are maintained at a cumulative level of less than 740 Torr, with water and glycol vapors being continuously removed from the secondary esterification zone, and free glycol being added to the secondary esterification zone in an amount sufficient to maintain a stable amount of liquid glycol in the secondary esterification zone. In various preferred embodiments of the invention, the secondary esterification zone can be maintained at a pressure substantially below atmospheric and the vapors from secondary esterification can be passed to a reflux column wherein glycol is condensed and returned to the secondary esterification zone, or the secondary esterification can be maintained at a pressure of about atmospheric and an inert gas can be injected into the vapor space thereby lowering the partial vapor pressures of water and glycol.

4. 发明专利

ES2032273T3 未知
公开(公告)号：ES2032273T3
公开(公告)日：1993-02-01
申请号：ES86309339
申请日：1986-12-01
申请人： CELANESE CORPORATION
发明人： GUPTA, BALARAM B.G. , NICOLAU, IOAN , AGUILO, ADOLFO
IPC分类号： B01J29/035 , B01J29/40 , C07C45/46 , C07C45/54 , C07C49/825 , B01J29/18 , B01J29/28

5. 发明专利

AU631936B2 RECOVERY OF ACRYLIC ACID AND/OR ETHYL ACRYLATE FROM BLACK ACID 未知
公开(公告)号：AU631936B2
公开(公告)日：1992-12-10
申请号：AU6473090
申请日：1990-10-19
申请人： HOECHST CELANESE CORPORATION
发明人： BRAD LEE SMITH , ADOLFO AGUILO , CECIL DAVID HOMER JR.
IPC分类号： C07C67/54 , C07C51/44 , C07C51/48 , C07C57/04 , C07C57/07 , C07C67/48 , C07C67/58 , C07C69/54
摘要： Black acid or the sulfuric acid residue obtained in the manufacture of ethyl acrylate by reaction of ethylene and acrylic acid in the presence of sulfuric acid is heated and distilled in a distillation zone in the presence of a solvent to form an overhead mixture comprising an organic phase containing ethyl acrylate and solvent, and an aqueous phase containing water, solvent and acrylic acid. The aqueous phase is recycled to the distillation zone for recovery of additional acrylic acid value from the organic phase.

6. 发明专利

ES2029006T3 未知
公开(公告)号：ES2029006T3
公开(公告)日：1992-07-16
申请号：ES88300617
申请日：1988-01-26
申请人： HOECHST CELANESE CORPORATION
发明人： MOTT, GRAHAM NIGEL
IPC分类号： C07C43/20 , B01J27/12 , C07B31/00 , C07B37/06 , C07B61/00 , C07C27/00 , C07C37/52 , C07C39/06 , C07C39/19 , C07C41/00 , C07C45/00 , C07C49/76 , C07C67/00 , C07C67/317 , C07C67/333 , C07C69/035 , C07C69/76 , C07C69/773
摘要： Alkylenebisphenols and alkyltrisphenols are dearylated under mild conditions of temperature and pressure in the absence of HF to obtain alkyl and/or alkenyl substitute or phenols and other related polymer products.

7. 发明专利

ES2027299T3 未知
公开(公告)号：ES2027299T3
公开(公告)日：1992-06-01
申请号：ES87309013
申请日：1987-10-13
申请人： HOECHST CELANESE CORPORATION
发明人： SCATES, MARK O. , TORRENCE, PAUL G. , WOOD, RONNY G.
IPC分类号： B01J38/74 , B01J23/96 , B01J31/26 , B01J31/40 , B01J39/04 , C07B61/00 , C07C51/00 , C07C51/12 , C07C53/08 , C07C67/00
摘要： A process for treating carbonylation catalyst solutions which contain a rhodium component and a lithium component to remove metallic corrosion products comprises contacting the catalyst solution with a cation exchange resin in the lithium form.

8. 发明专利

ZA873432B LIQUID/LIQUID EXTRACTIONS WITH MICROPOROUS MEMBRANES 未知
公开(公告)号：ZA873432B
公开(公告)日：1987-11-06
申请号：ZA873432
申请日：1987-05-13
申请人： CELANESE CORPORATION
发明人： EDWARD L. CUSSLER , ROBERT W. CALLAHAN , PAUL R. ALEXANDER, JR.
IPC分类号： B01D11/04 , B01D61/00 , B01D61/24 , B01D61/38 , B01D , C08J
摘要： The rate of mass transfer in liquid/liquid extractions can be increased by the appropriate selection of a solubilizing liquid to wet a microporous membrane. A solute is transferred between immiscible liquids across the membrane where an interface between the liquids is immobilized at a surface of the membrane.

10. 发明专利

DK139527C 未知
公开(公告)号：DK139527C
公开(公告)日：1979-08-27
申请号：DK622172
申请日：1972-12-14
申请人： CELANESE CORPORATION
发明人： RUSSO R V
IPC分类号： C08L67/00 , B65G63/00 , C08K3/34 , C08L67/02
摘要： Filled thermoplastic compositions comprising linear crystallizable polybutylene terephthalate with an I.V. of from about 0.2 to 1.5 deciliters/gm and acicular calcium metasilicate (calcium silicate).

你已经成功收藏专利！

检索式保存成功!

IPRDB