| http://www.w3.org/ns/prov#value | - The desired product and a small amount of hydroxy ether by-product withdrawn from the reaction zone is subjected to closely controlled fractional distillation using from 10 to 30 plates, preferably from 12 to 25 plates under vacuum and at a temperature between about 40??? C. and about 100??? C. Close temperature control is particularly important in the production of each of the divinylether produc
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