Ascend Performance Materials Operations LLC

Solutia Incorporated

Gregory E Bush

Darrick K Elmore

Mikhail I Khramov

Mikhail Khramov

Robert M Lembcke

Chris E Schwier

Steven W Cook

Described herein is an improved conversion of nitrous oxide (NO) present as a by-product in a chemical process to NOwhich can be further converted to a useful compound or material, such as nitric acid.

Process for preparation of nitrogen oxides and nitric acid from nitrous oxide

A process for producing a polyamide from dicarboxylic acid monomer and diamine monomer comprises the steps of: (a) mixing molten dicarboxylic acid monomer and molten diamine monomer in equimolar amounts, thereby producing a molten reaction mixture; (b) flowing the reaction mixture through at least one unvented reaction vessel, the residence time of the reaction mixture in the at least one unvented reaction vessel being between about 0.01 minutes and about 30 minutes, thereby forming a first product stream that comprises polyamide and water of polymerization; and (c) flowing the first product stream through at least one vented vessel, whereby water of polymerization is removed, thereby forming a second product stream that comprises polyamide. The process can operate continuously, and there is no need to add water to the dicarboxylic acid, to the diamine, or to the reaction mixture.

Continuous polyamidation process

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Pensacola, FL, United States of America

Gregory E Bush