METHOD FOR PREPARING POLYOLEFINIC BASES OF SYNTHETIC OILS

The invention relates to a method for the preparation of the polyolefinic bases of synthetic oils by the cationic oligomerization of olefinic feedstock and can be used in the petrochemical industry. A new method for the preparation of the polyolefinic bases of synthetic oils has been developed, whic...

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Main Authors KHANNANOV ROBERT GABDRAKHMANOVICH, DEMIDOV MIKHAIL ALEXANDROVICH, SAVCHENKO VALERY IVANOVICH, ILYASOV GABBAS LUKMANOVICH, YARULLIN RAFINAT SAMATOVICH, SHAMSUTDINOV VLADIMIR GARAFOVICH, ALDOSHIN SERGEI MIKHAILOVICH, MATKOVSKY PETR EVGENIEVICH, TROITSKY VLADIMIR NIKOLAEVICH, STARTSEVA GALINA PAVLOVA
Format Patent
LanguageEnglish
Published 29.08.2007
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Summary:The invention relates to a method for the preparation of the polyolefinic bases of synthetic oils by the cationic oligomerization of olefinic feedstock and can be used in the petrochemical industry. A new method for the preparation of the polyolefinic bases of synthetic oils has been developed, which comprises the steps of conditioning olefinic feedstock, preparing and dosing in a reactor, solutions and suspension of the components of a catalytic system Al(O)-HCI-TBCh, isomerizing alpha-olefins and oligomerizing higher olefins and mixtures thereof under the action of the catalytic system Al(O)-HCI-TBCh, separating spent catalyst, dividing an oligomerizate into fractions and hydrogenating the fractions separated under the action of a catalyst Pd(0.2 % w)/A120 3+NaOH. The invention provides the improvement of all steps of the method elaborated. For the corrosive activity of products to be removed, a method further comprises a step of the dechlorination of oligomerizate present chlorine-containing oligoolefins with metallic aluminum, triethyl aluminum, alcohol KOH solutions or the thermal dehydrochlorination of chlorine-containing polyolefins in the absence or presence of KOH. For improvement of method technico-economic indices owing to an increase in the yield of polyolefin target fractions having a kinetic viscosity of 2-8 cSt at 100°C, the method further comprises a step of the thermal depolymerization of restricted consumable high molecular polyolefins with a kinetic viscosity of 10-20 cSt at 100°C to target polyolefins with a kinetic viscosity of 2-8 cSt at 100°C.
Bibliography:Application Number: KR20077014080