Saudi Basic Industries Corporation

Frederick Merrill Galloway, Jr

Ashim Kumar Ghosh

Peter Loezos

Paulette N Hazin

John S Ledford

Mohammad Shafiei

Andy H Nuyen

Peter N Loezos

The present invention is for a process for the alkylation of aromatic compounds, with a shape-selective zeolite catalyst. The process has reactors in series with Caromatics being separated from the product stream effluents from each reactor before passing the reactor effluent to the next reactor with an additional input of methanol. The Caromatics are separated into para-xylene and other Caromatics. This process is applicable for toluene methylation having a molar excess of toluene:methanol. i.e., greater than 1:1, with a shape-selective catalyst of an aluminosilicate zeolite, such as ZSM-5 which has been modified with phosphorus, to produce para-xylene (p-xylene).

Aromatic alkylation process

A system and process for separating methacrolein (MA) from methacrylic acid (MAA) and acetic acid in the gas phase product from partial oxidation of isobutylene (IB) in two oxidation steps is disclosed. The process and system maximize recovery of all three components at minimum capital and energy cost, under conditions that minimize polymerization conditions and plugging by solids deposition in compressors, columns, etc.

System for producing methacrylic acid

A one-step vapor phase oxidation process produces an unsaturated carboxylic acid, such as acrylic acid or methacrylic acid, from an alkane, such as propane or isobutane, with a mixed metal oxide catalyst and an excess of alkane relative to oxygen. The unreacted alkane and the byproduct alkene are recycled to the reaction zone without separation. Overall yield and productivity of the unsaturated carboxylic improves for such a process. An analogous method for the preparation of unsaturated nitrites is also disclosed.

Process for producing an unsaturated carboxylic acid from an alkane

Process for separating methacrolein from methacrylic acid in a gas phase product from the partial oxidation of isobutene

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Tomball, TX, United States of America

Frederick Merrill Galloway, Jr