The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 1980
Filed:
Oct. 29, 1979
Applicant:
Inventors:
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570206 ;
Abstract
There is disclosed a process for the direct iodination of polyarylidene compounds to provide highly pure para-substituted diiodo derivatives. The polyarylidene compound is reacted with iodine in the presence of an oxidant, unreactive with the aromatic nucleus, in a reaction medium containing a solvent for the polyarylidene compound, a catalyst and water. The reaction medium is recovered for reuse in subsequent reactions by the removal of spent oxidant which, in the preferred embodiment, is based upon the temperature dependent differences in solubility between the diiodo derivative and the spent oxidant.