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:
Dec. 06, 1977
Filed:
Apr. 01, 1975
Evgeny Vasilievich Bart, Leningrad, SU;
Oleg Efimovich Batalin, Leningrad, SU;
Andrian Petrovich Troitsky, Moscow, SU;
Nina Andreevna Skachkova, Moscow, SU;
Vladimir Mikhailovich Lebedev, Khimiki Moskovskoi oblasti, SU;
Rimma Petrovna Trifonova, Moscow, SU;
Other;
Abstract
A method of processing high-boiling byproducts of isoprene production obtained at the first stage of isoprene production by the dioxane method into isoprene, isobutylene and formaldehyde which comprises the catalytic splitting of said products in the vapor phase in the presence of water with a weight ratio therebetween of 1:1/2, respectively, at 250-290.degree. C over aluminum oxide as catalyst. The resulting vapor mixture is catalytically split at 315.degree.-360.degree. C over calcium-phosphate catalyst with the formation of a reaction mixture containing isoprene, isobutylene and formaldehyde.