Effect of aromatic hydrocarbons on conditions for synthesis of low-molecular-weight polybutenes

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Chem. Technol. Fuels Oils (Engl. Transl.); (United States)

OSTI ID:6727723

Yasman, Y B; Grigor'ev, V V; Nel'kenbaum, E M; Prokof'ev, K V; Sangalov, Y A

This article investigates the effects on the individual stages in the polymerization of C/sub 4/ olefins of using reactive aromatic hydrocarbons and high-aromatic cuts as components of catalysts. The effect of aromatic hydrocarbons on C/sub 4/ olefin polymerization is determined by the nature and concentration of the arene and also by the polymerization conditions. C/sub 4/ olefin polymerization in the presence of aromatic hydrocarbons results in a side reaction of alkylation of the aromatic hydrocarbons by the monomer to form a light alkylate (distilling up to 250/sup 0/C at 0.101 MPa). It is demonstrated that a lowering of the isobutene polymerization temperature suppresses the formation of light alkylate. Polybutene synthesized in the presence of aromatic hydrocarbons contains aromatic fragments as end-groups. Depending on the C/sub 4/ olefin polymerization conditions, the aromatic hydrocarbons can promote the formation of light alkylate, modify the catalyst and bind it strongly in the polymer product, and change the composition and properties of the polybutenes. It is concluded that the multiple role of aromatic compounds in cationic polymerization processes must be taken into account when they are used for the synthesis of low-molecular-weight polybutenes. Includes 3 tables.

• Research Organization: Inst. of Chemistry, Bashkir Branch
• OSTI ID: 6727723
• Journal Information: Chem. Technol. Fuels Oils (Engl. Transl.); (United States), Journal Name: Chem. Technol. Fuels Oils (Engl. Transl.); (United States) Vol. 19:8; ISSN CTFOA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALCOHOLS
ALKENES
ALKYLATION
AROMATICS
BUTENES
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
HYDROCARBONS
HYDROXY COMPOUNDS
MOLECULAR WEIGHT
MONOMERS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
POLYOLEFINS
SYNTHESIS
TEMPERATURE DEPENDENCE