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Izrail M Belgorodsky

Oleg E Batalin

Arkady S Dykman

Vladimir I Nevstruev

Anatoly I Lukashov

Valentin M Belyaev

Jury I Smolin

Mark I Breiman

Vitaly V Orlyansky

Alexandr I Osadchenko

Eduard A Tulchinsky

Nikolai Y Zhirnov

Nikolai V Galibin

Vladimir V Kovalenko

Valery A Radionov

Galina F Balkhanova

Jury Ivanovich Michurov

Yakov Abramovich Gurvich

Vladimir Avgustovich Yanshevsky

Igor Jurievich Logutov

Andrian Petrovich Troitsky

Rufina Alexandrovna Filippova

Izmail Vladimirovich Garmonov

Sergei Gerasimovich Vyborov

Nikolai Fedorovich Kovalev

Vladimir Alexandrovich Krol

Elena Nikolaevna Kropacheva

Vladislav Petrovich Smirnov

Arkady Samuilovich Estrin

Valentin Vasilievich Sazykin

Adrian P Troitsky

Jury Alexandrovich Lvov

Ljudmila V Golovko

Natalya Borisovna Monastyrskaya

Lidia Mikhailovna Pospelova

Ljubov Petrovna Bataeva

Lev Moiseevich Kogan

Efim Moiseevich Sire

Larisa Mikhailovna Davydova

Oleg A Ostroukhov

Semen Moiseevich Kavun

Basia Moiseevna Bolkhovets

Anatoly Sergeevich Lykin

Olga Izrailevna Belgorodskaya

Sofya Alexandrovna Egoricheva

Anatoly Vasilievich Gagin

A catalyst for decomposition of 1,3-dioxanes, comprising calcium oxide, phosphorus pentoxide, chlorine, water and boron oxide, the ratio of the components as expressed in mass percent being as follows:

Catalyst for decomposition of 1,3-dioxanes

The invention relates to a method of preparing a calcium boron phosphate catalyst, comprising the steps of reacting calcium salts with phosphoric acid salts in aqueous ammonia, separating the resulting precipitate from the reaction mixture thus obtained, suitably shaping said precipitate, drying it, and heat treating at an elevated temperature in the presence of steam or steam with an inert gas, mixed with at least one of the components selected from the group consisting of boric acid and, a mixture of boric and phosphoric acids, the molar ratio of boric to phosphoric acids being between 1.0:1 and 10:1. The reaction of calcium salts with phosphoric acid salts in aqueous ammonia is effected with the starting reactants taken in the molar ratio of 1.5:1 if no phosphoric acid treatment is used, or with the starting reactants in a molar ratio of between 1.5:1 to 5.0:1 if the reaction mixture is treated with a phosphoric acid solution to pH of from 5.0 to 7.0.

Method of preparing calcium boron phosphate catalyst

Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting a calcium salt with a phosphoric acid salt in aqueous ammonia, separating the precipitate resulting from the reaction mixture thus obtained, suitably shaping said precipitate, drying it, and subjecting it to heat treatment within a temperature range of 450.degree. to 600.degree. C. in the presence of steam mixed with at least one of the components selected from the group consisting of an inert gas, air, phosphoric an acid, aldehyde, an oxygen-containing heterocyclic compound, an alcohol, and a diene hydrocarbon. The reaction of calcium salts with phosphoric acid salts in aqueous ammonia is effected with the starting reactants taken in the molar ratio of 1.5:1 if no phosphoric acid treatment is used, or with the starting reactants in a molar ratio within the range of 1.5:1 to 5.0:1 if the reaction mixture is treated with a phosphoric acid solution to a pH of from 5.0 to 7.0.

Method of preparing a calcium phosphate catalyst

A method for preparing 2,6-ditert.butylphenol which comprises alkylation of phenol in the presence of monotert.-butylphenol and a catalyst, viz. aluminium dissolved in phenol with gradually lowering the process temperature from 120.degree. to 50.degree. C and reducing the concentration of isobutylene in the mixture of isomeric butenes from 80 to 1.5 mol.%, followed by isolation of the desired product. The method according to the present invention makes it possible to achieve a high degree of conversion of isobutylene without impairing quality of the desired product. The amount of by-products formed in the process is 2-3 times as less as in the prior art methods.

Method for preparing 2,6-ditert.butylphenol

Modified and stabilized synthetic cis-1,4 polyisoprene is a product of chemical interaction between synthetic cis-1,4 polyisoprene containing no less than 95 percent of cis-1,4 units and 0.05 to 1 mass percent of 4-nitrosodiphenylamine. The proposed method of making this product comprises polymerization of isoprene in hydrocarbon solvent in the presence of Ziegler-Natta catalyst, the addition to the polymerization mass of 0.05 to 1 mass percent of, and degassing and drying of the rubber thus produced. The product possesses improved properties, including good stability in the course of storage and machining. Unvulcanized rubber mixed on the basis of this product are marked by a high adhesion strength, whereas the vulcanizates have splendid elastic hysteresis and fatigue characteristics. The quality of the novel product is in no way inferior to that of natural rubber.

Modified and stabilized synthetic cis-1,4 polyisoprene and method for

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Izrail M Belgorodsky