Tpc Group LLC

Rex Lawson

Sohel K Shaikh

Sohel Shaikh

Sathy Ponnuswamy

Klaus R Menschig

In one preferred embodiment, the present invention provides a process for the liquid phase polymerization of isobutylene to manufacture highly reactive PIB oligomers having Mn under 1000, using a catalyst composition comprising a Friedel-Crafts catalyst a complexing agent, a chain transfer agent and a polymerization-retarding agent. A chain transfer agent may be selected from: &#x3b1;-DIB and &#x3b2;-DIB and mixtures thereof.  A polymerization-retarding agent may be selected from: 

Production of highly reactive low molecular weight PIB oligomers

A process for production of polyisobutylene includes subjecting a reaction admixture comprising isobutylene, a diluent for the isobutylene, which may be isobutane, and a catalyst composition, that may include a BF/methanol catalyst complex, to reaction conditions suitable for causing at least a portion of the isobutylene to undergo polymerization to form a polyisobutylene product including polyisobutylene molecules. At least a fraction of the polyisobutylene molecules thus produced have alpha position double bonds and the polyisobutylene product has a number average molecular weight (M) and a polydispersity index (PDI). The concentration of the diluent in the reaction admixture may be manipulated to control or change any one or more of (a) the relative size of the fraction, (b) the number average molecular weight of the product, (c) the polydispersity index of the product and (d) the relative size of the portion. The diluent concentration may be held constant to maintain any one or more of such characteristics constant.

Polyisobutylene production process with improved efficiencies and/or for forming products having improved characteristics and polyisobutylene products produced thereby

In one preferred embodiment, the present invention provides a process for the liquid phase polymerization of isobutylene to manufacture highly reactive PIB oligomers having Mn under 1000, using a catalyst composition comprising a Friedel-Crafts catalyst a complexing agent, a chain transfer agent and a polymerization-retarding agent. A chain transfer agent may be selected from: &#x3b1;-DIB and &#x3b2;-DIB and mixtures thereof. A polymerization-retarding agent may be selected from: 

In an embodiment, the present invention provides a process for the liquid phase polymerization of isobutylene to manufacture highly reactive PIB oligomers having Mn under 1000, using a catalyst composition comprising a Friedel-Crafts catalyst and a complexing agent, in the presence of a chain transfer agent. The process advantageously uses short residence times for the isobutylene in the polymerization reaction zone as well as a chain transfer agent selected from: &#x3b1;-DIB and &#x3b2;-DIB and mixtures thereof. 

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Pearland, TX, United States of America

Rex Lawson