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    • 91. 发明授权
    • Preparation of adipic acid
    • 己二酸的制备
    • US4931590A
    • 1990-06-05
    • US205340
    • 1988-06-10
    • Rudolf KummerFranz MergerWerner BertleffRolf Fischer
    • Rudolf KummerFranz MergerWerner BertleffRolf Fischer
    • B01J31/20C07B61/00C07C51/00C07C51/09C07C55/14C07C67/00C07C67/29C07C67/347C07C67/39C07C69/44C07C69/67
    • C07C67/347C07C51/09C07C67/39
    • Adipic acid is prepared by a process which comprises the following steps:(a) Hydroformylation of a pentenoic ester by reaction with carbon monoxide and hydrogen at elevated temperatures and under superatmospheric pressure in the presence of a cobalt carbonyl or rhodium carbonyl complex with formation of a mixture of 5-, 4- and 3-formylvaleric esters,(b) isolation of the 5-formylvaleric ester from the resulting mixture of 5-, 4- and 3-formylvaleric esters, a mixture essentially consisting of 4- and 3-formylvaleric esters remaining,(c) dehydrocarbonylation of the mixture consisting essentially of 4- and 3-formylvaleric esters in the presence of one or more elements of subgroup 8 of the Periodic Table at from 50.degree. to 400.degree. C. with formation of pentenoic esters, and recycling of the latter to stage (a) for hydroformylation,(d) oxidation of the 5-formylvaleric ester from stage (b) with molecular oxygen or a gas containing molecular oxygen to give a monoester of adipic acid, and(e) hydrolysis of the monoester of adipic acid to give adipic acid.
    • 己二酸通过包括以下步骤的方法制备:(a)在羰基或羰基铑羰基络合物的存在下,在一氧化碳和氢气下,在升高的温度和超大气压下与戊烯酸酯反应,加氢甲酰化形成 5-,4-和3-甲酰基戊酸酯的混合物,(b)从得到的5-,4-和3-甲酰基戊酸酯混合物中分离出5-甲酰基戊酸酯,基本上由4-甲酰基戊酰胺 剩余的酯,(c)在50℃至400℃下在元素周期表第8族的一种或多种元素存在下,基本上由4-甲酰基戊酸酯组成的混合物的脱氢羰基化,形成戊烯酸酯, 并将后者再循环到步骤(a)进行加氢甲酰化,(d)用分子氧或含有分子氧的气体从阶段(b)氧化5-甲酰基戊酸酯,得到己二酸的单酯,和(e) 水解己二酸的单酯得到己二酸。