Lyondell Chemical Technology, L.p.

Lyondellbasell Acetyls, LLC

Linn Fang

Daniel F White

Lei Zhang

Chuc T Nguyen

Methods of converting isobutylene to C5+ compounds. The methods may include contacting isobutylene with a skeletal isomerization catalyst to provide a mixture of Colefins, and then contacting the mixture of Colefins with a metathesis catalyst to convert the mixture of Colefins to a product mixture. The product mixture may include Colefins.

Methods for isobutylene conversion to C5+ compounds

Purification methods and systems for working up a crude vinyl acetate stream containing vinyl acetate monomer, acetic acid, water, ethyl acetate, and other impurities. Crude vinyl acetate streams are purified with an azeotropic distillation tower using a side draw to remove ethyl acetate and water, and a bottom stream to remove acetic acid from the crude vinyl acetate. The methods and systems move the side draw to a location on the azeotropic distillation tower that maintains a constant water concentration in the bottom product of about 4 to about 15 wt. % and forms a vapor side product. A second distillation tower is used to further purify the vapor side product to obtain water, VAM, ethyl acetate and AA. The system provides easier disposal of ethyl acetate, and cleaner water that can be recycled in the reactor or purification sections of a VAM plant and full recovery of AA.

Ethyl acetate removal during VAM production

Methods of producing propylene and/or ethylene. The methods can include contacting a mixture of C4+ compounds with a catalyst, such as a fixed bed catalyst, that includes a phosphorus treated zeolite. The mixture of C4+ compounds can include a plurality of C4 olefins, a plurality of C5 olefins, and/or a plurality of C6+ olefins.

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Houston, TX, United States of America

Linn Fang