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Machine translation
1. (WO1981002297) METHOD OF OBTAINING 4,4-DIMETHYL-1,3-DIOXANE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002297    International Application No.:    PCT/SU1980/000020
Publication Date: 20.08.1981 International Filing Date: 13.02.1980
IPC:
C07D 319/06 (2006.01)
Applicants:
Inventors:
Priority Data:
SU80/00020 13.02.1980 WO
Title (EN) METHOD OF OBTAINING 4,4-DIMETHYL-1,3-DIOXANE
(FR) PROCEDE D"OBTENTION DE 4,4-DIMETHYLE-1,3-DIOXANE
Abstract: front page image
(EN)This method is used for production of isoprene which serves as a raw material for synthetic rubber. The method consists in reacting isobutylene with an aqueous solution of formaldehyde within the interval of temperatures of 60 to 90 C, at a pressure of 6 to 18 atm and in the presence of a salt of polysulphonic acid of formula R(SO3H)n as an acid catalyst, where n is an integer equal to 2 or 3, R is a C1-C4 alkyl or unsubstituted phenyl or substituted phenyl, and a metal of groups I and II of the periodic system or a mixture of that salt with sulphonic acid.
(FR)Ce procede est utilise pour produire de l"isoprope servant de materiau brut pour fabriquer du caoutchouc synthetique. Le procede consiste a faire reagir l"isobutylene avec une solution aqueuse de formaldehyde dans une plage de temperature comprise entre 60 et 90 C a une pression de 6 a 18 atm et en presence d"un sel d"acide polysulfonique de formule R(SO3H)n comme catalyseur acide, ou n est un nombre entier egal a 2 ou 3, R est un alkyle de C1 a C4 ou un phenyle non substitue ou un phenyle substitue, et un metal des groupes I et II du systeme periodique ou un melange de ce sel avec l"acide sulfonique.
Designated States:
Publication Language: Russian (RU)
Filing Language: Russian (RU)