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:
Jun. 02, 1987
Filed:
May. 24, 1985
Tomihiro Kurosaki, Osaka, JP;
Junya Wakatsuki, Wakayama, JP;
Hisakazu Furugaki, Wakayama, JP;
Katsutoshi Kojima, Wakayama, JP;
Kao Corporation, Tokyo, JP;
Abstract
A novel process for producing a phosphoric monoester which comprises reacting per 1 mole of a linear or branched, saturated or non-saturated aliphatic alcohol having from 8 to 36 carbon atoms, from 2 to 10 moles of a polyphosphoric acid at 100 to 116% concetration converted as orthophosphoric acid in (a) one or more solvents selected from the group consisting of linear or branched saturated aliphatic hydrocarbons having from 4 to 8 carbon atoms and saturated cycloaliphatic hydrocarbons having from 5 to 7 carbon atoms, then adding (b) a lower alcohol having from 1 to 4 carbon atoms and water to the reaction mixture, transferring the orthophosphoric acid to the lower alcohol-aqueous phase to separate it from the phosphoric monoester, and concentrating the thus recovered orthophosphoric acid for reuse. The process reaction proceeds smoothly, separation and purification can be carried out readily and very effectively and the recovered phosphoric acid can be re-used.