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:
May. 02, 1978
Filed:
Dec. 16, 1975
Yakov Abramovich Gurvich, Moscow, SU;
Alexandr Afroimovich Grinberg, Moscow, SU;
Alexandr Grigorievich Liakumovich, Kazan, SU;
Jury Ivanovich Michurov, Sterlitamak Bashkirskoi ASSR, SU;
Olga Fedorovna Starikova, Moscow, SU;
Vladimir Avgustovich Yanshevsky, Novokuibyshevsk, SU;
Simona Tevievna Kumok, Moscow, SU;
Evgeny Lvovich Styskin, Moscow, SU;
Grigory Iosifich Rutman, Sterlitamak Bashkirskoi ASSR, SU;
Other;
Abstract
A method of producing 2,2'-methylenebis(4,6-dialkylphenols) residing in that 2,4-dialkylphenols interact with acetals in the presence of an acid catalyst at a temperature from 30.degree. C to 140.degree. C with the formation of a reaction mixture containing the desired product and with subsequent separation of the desired product from said mixture, the starting reagents being taken in amounts of 1 mole of 2,4-dialkylphenol per 1-10 moles of acetal. The method is technologically simple and accomplished without the formation of waste water.