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:
Aug. 29, 1978
Filed:
Dec. 30, 1976
Applicant:
Inventors:
James C Drummond, Bridgeton, MO (US);
Lawrence J Hughes, St. Charles, MO (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568729 ;
Abstract
A process is described for preparing 4,4'-dihydroxydiphenylethane by reacting phenol with a 1,2-dihaloethane in which the halogen is chlorine, bromine or iodine, in at least the stoichiometric proportions of 2:1 in contact with a catalyst comprising lanthanum oxide supported on an inorganic material such as silica at a temperature from about 125.degree. to about 225.degree. C. and in the presence of a hydrogen halide as a promoter.