Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Patent
1991-09-23
1993-10-12
Lilling, Herbert J.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
435136, 435139, 435855, 560179, 560212, 502217, 562598, 562599, 562600, C12P 762, C12P 740, C12P 756, C07C 6966
Patent
active
052524736
ABSTRACT:
Processes are disclosed for producing lactic acid, esters of lactic acid, acrylic acid, and esters of acrylic acid, primarily from fermentable carbohydrate materials. An overall process for producing esters of acrylic acid comprises: a) fermenting carbohydrate material with a lactic-acid-forming organism in the presence of NH.sub.3 to produce ammonium lactate; b) combining the ammonium lactate with an alcohol; c) combining the ammonium lactate and alcohol with an effective catalyzing amount of gaseous CO.sub.2 to catalytically esterify the ammonium lactate and alcohol into a lactic acid ester containing solution; d) recovering purified lactic acid ester; and e) vaporizing the lactic acid ester and passing it through a solid catalyst bed comprised of an effective catalyzing amount of crystalline hydrated and partially calcined calcium sulfate to catalytically convert lactic acid ester into an acrylic acid ester. Step "d" would be useful in a process for making low-cost, purified lactic acid. Similarly, step "e" would be useful in a process for making low cost, purified acrylic acid.
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Eakin David E.
Hallen Richard T.
Rohrmann Charles A.
Walkup Paul C.
Battelle (Memorial Institute)
Lilling Herbert J.
Meller Mike
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