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. 06, 1977
Filed:
Jul. 23, 1975
Applicant:
Inventors:
Robert A Dubois, Framingham, MA (US);
Harold H Freedman, Newton Center, MA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 2606 / ;
Abstract
Symmetrical ethers are prepared in high yield by reacting an alkyl halide, sulfate, or sulfonate with base in the presence of a catalytic amount of both an onium salt and a carboxylate salt. For example, dibenzyl ether is produced in yields exceeding 95 percent by contacting benzylchloride with a 50 percent sodium hydroxide solution in the presence of a catalytic amount of both tetra-n-butylammonium bisulfate and sodium acetate.