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:
Feb. 14, 1978
Filed:
May. 26, 1976
Jury V Kandul, Kiev, SU;
Valery Y Semeny, Kiev, SU;
Mikhail D Pivovarov, Kiev, SU;
Vladlen V Malovik, Kiev, SU;
Ivan K Mazepa, Kiev, SU;
Ninel G Feschenko, Kiev, SU;
Other;
Abstract
The method for producing trialkylphosphine oxides having the general formula R.sub.3 PO, where R is an alkyl having from 1 to 16 carbon atoms, consists in that red phosphorus reacts with an alkyl iodide in the presence of a catalyst -- iodine or hexaalkyliodophosphoranephosphonium pentaiodide -- while gradually adding alkyl iodide to the reaction mixture, and maintaining the reaction temperature at 180.degree. - 230.degree. C., with subsequent isolation of the end product. The proposed method simplifies the process for preparing trialkylphosphine oxides, increases the yield of the end product to 80- 90 per cent by weight, rules out side reactions of dehydrohalogenation of alkyl iodides, and also shortens the process to 8- 10 hours.