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:
Mar. 31, 1981
Filed:
Oct. 07, 1977
Yakov A Gurvich, Moscow, SU;
Simona T Kumok, Moscow, SU;
Galina G Latysheva, Moscow, SU;
Anna I Rybak, Moscow, SU;
Evgeny L Styskin, Moscow, SU;
Alexandr G Liakumovich, Kazan, SU;
Jury I Michurov, Sterlitamak Bashkirskaya ASSR, SU;
Rufina A Filipova, Novokuibyshevsk Kuibyshevskoi oblasti, SU;
Vladimir A Yanshevsky, Novokuibyshevsk Kuibyshevskoi oblasti, SU;
Grigory I Rutman, Sterlitamak Bashkirskaya ASSR, SU;
Igor J Logutov, Sterlitamak Bashkirskaya ASSR, SU;
Other;
Abstract
A method for the production of 2,4,6-tri(3,5-ditertiary butyl-4-hydroxybenzyl)mesitylene which resides in treating a mesitylene solution in chloroalkane simultaneously with sulfuric acid used as a catalyst and a solution of 2,6-ditertiary butyl-4-methoxymethylphenol or bis-3,5-ditertiary butyl-4-hydroxybenzyl ether in chloroalkane at a temperature of -20.degree. to +20.degree. C. This results in a reaction mixture consisting of an acid phase and an organic phase including the target product. The phases are separated. The organic phase is subjected to neutralization by the treatment thereof with gaseous ammonia used as an alkaline agent. The precipitate of ammonium sulfate is separated and chloroalkane is removed from the remaining solution. The proposed method makes it possible to obtain the target product with a yield of 88 to 90% and a melting temperature of 239.degree. to 239.5.degree. C. The method prevents the formation of effluents, and the amount of phenol wastes is considerably reduced.