Standard Oil Company (indiana)

Bp Corporation North America Inc.

Linus K Leung

Thomas Bartos

Chi-Hung Lin

David S Chang

Lawrence J Beck

Gregory E Schmidt

Thomas M Bartos

A process and apparatus for manufacture of aromatic carboxylic acids comprises a liquid phase oxidation of aromatic hydrocarbon feed materials and treatment of a high pressure off-gas from the liquid phase oxidation to separate water and reaction solvent and preferentially apportion liquid phase oxidation by-product species between gas and liquid phase resulting from separation. Processes for making pure forms of aromatic carboxylic acid also are included.

Process and apparatus for manufacturing aromatic carboxylic acids including pure forms thereof

The method is particularly adapted for controlling the molecular weight of a product output from a polybutene reactor. The method includes the steps of: deriving from the operating parameter of a polybutene reactor system a formula which correlates molecular weight as determined by product viscosity or other parameters of the product output with operating variables such as temperature of the reactor and concentration of isobutylene in the reactor, which concentration can be controlled by the amount of catalyst, e.g., aluminum chloride, being fed into the reactor; monitoring (a) the temperature of the reactor, (b) the concentration of isobutylene in the reactor, (c) the flow of coolant supplied to the reactor for controlling the temperature thereof and (d) the feed rate of catalyst into the reactor; calculating with said algorithm the approximate molecular weight of the product output; determining if the desired product molecular weight is higher or lower than the calculated molecular weight; and, if higher or lower, altering, through use of the formula, the temperature and/or the concentration of isobutylene in the reactor to obtain the desired product molecular weight. Also the method can include the step of adding moisture to the feed or the reactor for lowering the molecular weight of the polybutene product output. The apparatus includes a reactor, a computer and various sensing, monitoring and control devices for carrying out the steps of the method.

Method and apparatus for controlling polybutene production

Polyolefin polymer powder containing active catalyst residues is deactivated by (1) purging with an inert gas containing water vapor and (2) then contacting such powder with a gas mixture containing an inert gas, water vapor, and a third component selected from the group consisting of oxygen, carbon monoxide, carbon dioxide, C.sub.1 -C.sub.4 alcohols and C.sub.2 -C.sub.4 alkeneoxides.

Process for reducing polyolefin die smoke

Polymerization performance of organoaluminum reduced, electron donor complexed, brown solid, beta titanium trichloride catalyst component is improved in terms of polymer particle size by contacting said brown solid with at least one aluminum alkyl and at least one alpha-olefin in amounts and under conditions such that a low yield, polyalphaolefin structure is formed around the brown solid.

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Naperville, IL, United States of America

Linus K Leung