1-Butene prodn. by ethylene dimerisation - with titanium alcoholate-alkylaluminium catalysts

• Main Author: GENNADY PETROVICH BELOV, NELLI DZHAVKHAROVNA KARPOVA, TAIMURAZ SAVELIEVICH DZHABIEV, KHAIM-MORDKHE ARONOVICH BRIKENSHTEIN, FRIDIRKH STEPANOVICH DYACHKOVSKY, MATRENA PETROVNA GERASINA, VYACHESLAV IVANOVICH SMIRNOV, VLADIMIR EVGENIEVICH KUZMIN, PETR EVGENIEVICH MATKOVSKY, LJUDMILLA NICOLAEVNA RUSSIAN, ANATOLY DMITRIEVICH POMOGAILO ET NICOLAI MIKHAILOVICH CHIR
• Format: Patent
• Language: English; French
• Published: 09.01.1976
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

1-Butene is prepd. by dimerisation of ethylene in an org. solvent in the presence of a catalyst system comprising (a) a complex Ti alcoholate of formula (RO)3TiR'.AIR"2OR (where R is 2-4C alkyl; R' = R or H; R" is as defined for R) and a trialkylaluminium or (b) a Ti alcoholate of formula Ti(OR)4, a dialkylaluminium hydride and a modifier comprising dicyclopentadienyltitanium dichloride, O2, m-phenyl-enediamine or N-phenyl-beta-naphthylamine. 1-Butene is used in the prodn. of n-butanol, ethylene/butylene copolymers, isotactic polybutene, butene oligomers and butadiene. Compared with conventional ti alcoholate catalysts, system (a) increases the yield of 1-butene by ca. 25 wt. % and decreases the yield of by-prods. (higher olefins, polyethylene) to 1.7-5.3 wt. % and system (b) increases the yield of 1-butene by 10-20%.