The Dow Chemical Company

Albert C Tsang

Oliver C Ainsworth

Carl P Strange

Johnny W Masey

Harold B Martin, Jr

Thomas L Holland

Prepare alkylene glycols by hydrolyzing alkylene carbonates under specific conditions, and a reactor specially designed therefor.

Process for producing alkylene glycols

Non-gelling cellulose ethers are purified by mixing same with a dialdehyde under acidic conditions and under high agitation, forming a slurry of the treated cellulose ether, rapidly transferring the slurry to a filter and then dewatering said slurry.

Process for preparing cellulose ethers

In the manufacture of ethylene oxide by the partial oxidation of ethylene in the vapor phase, the effluent gases from the reaction are absorbed in water prior to separation and purification of the ethylene oxide. The present invention is the improvement in which ethylene carbonate is employed as the absorbing medium for the ethylene oxide.

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Baton Rouge, LA, United States of America

Albert C Tsang