Title:
【発明の名称】ポリアミドウレタンの逆浸透膜
Document Type and Number:
Japanese Patent JPH0722689
Kind Code:
B2
Abstract:
Chloroformyloxy-substituted isophthaloyl chlorides are made by forming a mixture of hydroxy-substituted isophthalic acid, or salt thereof, catalyst, phosgene and solvent, heating the mixture in a pressure vessel under autogeneous pressure, treating the mixture to remove the solvent, and distilling the mixture to yield the chloroformyloxy-substituted isophthaloyl chloride. The preferred chloroformyloxy-substituted isophthaloyl chloride is 5-chloroformyloxyisophthaloyl chloride and the preferred catalyst is imidazole.
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Inventors:
Samuel David Arthur
Application Number:
JP23888191A
Publication Date:
March 15, 1995
Filing Date:
August 27, 1991
Export Citation:
Assignee:
E.I.DU PONT DE NEMOURS AND COMPANY
International Classes:
B01D69/12; B01D71/54; B01J31/02; B01D71/56; C07B61/00; C07C67/00; C07C67/14; C07C68/02; C07C69/96; C08G71/00; (IPC1-7): B01D71/54; B01D71/56
Domestic Patent References:
| JP5926101A |
Attorney, Agent or Firm:
Heiyoshi Odashima (1 person outside)
Next Patent: 芳香族ポリスルホン中空糸膜およびその製法