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:
Sep. 02, 1997
Filed:
Mar. 27, 1995
Edward J Griffith, Manchester, MO (US);
Toan M Ngo, Eureka, MO (US);
G.D. Searle & Company, Chicago, IL (US);
Abstract
There is disclosed a novel process for preparing products of the reaction of elemental phosphorus and elemental sulfur under reaction conditions wherein the phosphorus and sulfur are combined in a pre-mix at temperatures below the reaction temperature. The pre-mix may contain a diluent which is preferably the product of the reaction. Phosphorus pentasulfide can be prepared by heating the pre-mix to reaction temperatures wherein lower exotherm temperatures and reduced vibration are observed. Organophosphorus and thionated products can be prepared by the reaction of elemental sulfur and elemental phosphorus together with an organic compound wherein the ratio of phosphorus and sulfur generally corresponding to P.sub.2 S.sub.5. The process obviates the need for separately preparing phosphorus pentasulfide to prepare thiohated and organophosphorus compounds.