Pilot run,plant design and cost analysis for reductive ozonolysis of methyl soyate |
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Authors: | P E Throckmorton E H Pryde |
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Affiliation: | (1) Research and Development Laboratories, Ashland Oil, Inc., 43216 Columbus, Ohio;(2) Northern Regional Research Laboratory, 61604 Peoria, Illinois |
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Abstract: | Preparation of methyl azelaaldehydate dimethyl acetal (MAzDA) from methyl soyate was investigated on a pilot scale via the
sequence ozonization, hydrogenation, acetalization and fractional distillation. A water-methyl soyate emulsion for the ozonization
step was preferred to methanolic solution or neat methyl soyate for reasons of cost and safety. Ozonization of the water-methyl
soyate emulsion (1.63:1 ratio) in a six-plate sieve tower produced 1271 lb aqueous peroxidic emulsion during 12 days of continuous
operation. Because a continuous hydrogenation facility was not available, reduction was done in 200 lb batches. Since batch
hydrogenation of the peroxidic emulsion in this quantity was difficult to control and optimum conditions were difficult to
maintain, maximum yield of the product was only 56%. The average yield for seven batches was 48.3%. However laboratory hydrogenation
under optimum conditions of periodic samples taken from the sieve tower discharge indicated an overall yield of 74.5% (average
of eight monitor samples). A plant designed to produce 10 million lb annually should be capable of producing MAzDA at a total
manufacturing cost of 39 cents/lb or a net manufacturing cost of 27 cents/lb with byproduct credit conservatively estimated.
Methyl soyate ozonolysis products are not sensitive to detonation, and their exothermic decomposition is greatly moderated
by the presence of water.
Presented in part at the AOCS Meeting, New Orleans, May 1967; see Abstr. 117, JAOCS 44:139A (1967).
ARS, USDA. |
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