Dow Global Technolgoies LLC

Dow Technology Investments LLC

Yujun Liu

Stephen W King

Xue Chen

Hwaili Soo

John G Pendergast, Jr

Junqiang Liu

Edward M Calverley

Mark K Brayden

Albert C Liu

Marcos V Martinez

Manuk Colakyan

Amarnath Singh

Juliana G Serafin

Steven R Lakso

William H Henstock

Robert D Swindoll

Johnny W Masey

Sagar Petkar

Towhid Hasan

James York

Jerrod Ruddick

Albert Liu

Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber.

Process for purification of vent streams

A novel microporous carbon molecular sieve may be used as the basis for carbon adsorbent pellets that have discrete areas of carbonized binder and of carbonized precursor, macropores having an average pore diameter greater than or equal to 1 micrometer and a total macroporosity of at least 30 percent, both as measured by mercury porosimetry, and micropores that are capable of selectively admitting a C2-C3 alkene and excluding a C2-C3 alkane, and a total microporosity ranging from 10 percent to 30 percent. The pellets may be prepared by pyrolyzing a pellet structure comprising a carbon forming, non-melting binder and a non-porous gel type sulfonated polystyrene precursor at a temperature ranging from 500&#xb0; C. to 1000&#xb0; C., under an inert atmosphere and other conditions suitable to form the described pellets. The pellets are particularly useful in pressure swing and temperature swing adsorption processes to separate C2-C3 alkane/alkene mixtures.

Carbon molecular sieve and pellet compositions useful for C2-C3 alkane/alkene separations

A plant and process for producing alkylene oxides to control the production of silver chloride on a high efficiency silver catalyst is disclosed and described. The process involves reacting an alkylene and an organic chloride gas phase promoter with oxygen over the high efficiency silver catalyst. The sulfur concentration in the alkylene oxide reactor feed is controlled to reduce the production of silver chloride which acts as a catalyst poison.

Method of controlling the production of silver chloride on a silver catalyst in the production of alkylene oxides

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Pearland, TX, United States of America

Yujun Liu