Title:
【発明の名称】ヨウ素またはヨウ化物不純物の除去
Document Type and Number:
Japanese Patent JP2820977
Kind Code:
B2
Abstract:
A process for removing iodine or soluble iodide impurities from a carboxylic acid or carboxylic acid anhydride, the carboxylic acid or carboxylic acid anhydride having been produced by a carbonylation process, comprises step (a) treating impure carboxylic acid or carboxylic acid anhydride containing iodine or soluble iodide impurities with an unsupported scavenger at a temperature of between 20 and 250 DEG C and step (b) thereafter separating the treated carboxylic acid or carboxylic acid anhydride from the scavenger characterised in that the scavenger consists of a silver salt in the absence of a trialkyl phosphine, a triaryl phosphine and a heterocyclic aromatic nitrogen compound. The preferred scavenger for acetic acid and acetic anhydride is silver acetate.
Inventors:
Benjamin Patrick Gracie
Application Number:
JP24661789A
Publication Date:
November 05, 1998
Filing Date:
September 25, 1989
Export Citation:
Assignee:
BP Chemicals Limited
International Classes:
C07C51/12; C07C51/487; C07C51/573; C07C53/08; C07C53/12; C07B61/00; (IPC1-7): C07C53/08; C07C51/12; C07C51/487; C07C51/573; C07C53/12
Domestic Patent References:
| JP61209053A | ||||
| JP1110643A |
Other References:
【文献】米国特許3709795(US,A)
【文献】米国特許3658467(US,A)
【文献】米国特許3772156(US,A)
【文献】米国特許4029553(US,A)
【文献】米国特許4664753(US,A)
【文献】欧州公開196173(EP,A)
【文献】西独国特許公開3612504(DE,A1)
【文献】米国特許3658467(US,A)
【文献】米国特許3772156(US,A)
【文献】米国特許4029553(US,A)
【文献】米国特許4664753(US,A)
【文献】欧州公開196173(EP,A)
【文献】西独国特許公開3612504(DE,A1)
Attorney, Agent or Firm:
Haruo Hamada