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:
Jan. 09, 1979
Filed:
Feb. 04, 1977
Eugene H Uhing, Pleasantville, NY (US);
Francis A Via, Yorktown Heights, NY (US);
Stauffer Chemical Company, Westport, CT (US);
Abstract
Improved yields and a lower accumulation of by-product is obtained in the method for preparing compounds of the formula: ##STR1## wherein R is a C.sub.1 to C.sub.20 alkyl radical, cycloalkyl of 5-6 carbon atoms in the ring and the C.sub.1 -C.sub.4 alkyl substituted derivative thereof, an aralkyl radical of up to two fused rings, the alkyl portion having from 1 to 20 carbon atoms, an aryl radical of up to three fused rings and the C.sub.1 -C.sub.4 alkyl derivatives thereof, and biphenyl and the C.sub.1 -C.sub.4 alkyl derivatives thereof, X is a halogen of chlorine or bromine, and Z is either R or X, by the reaction of a phosphorus halide source, a hydrocarbon source selected from the group consisting of RH, RX and RSaR, wherein a is 1 or 2 and a sulfur source under autogenous pressure in an autoclave at a temperature ranging from about 175.degree. C. to about 450.degree. C. by recycling to successive runs a by-product of the reaction remaining after separation of the RP(S)XZ product fraction selected from the group consisting of: