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Methacrylic acid prodn. - from oxidative dehydrogenation of isobutyric acid in the presence of a catalyst and carrier
Methacrylic acid prodn. - from oxidative dehydrogenation of isobutyric acid in the presence of a catalyst and carrier
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机译：甲基丙烯酸产品-在催化剂和载体存在下异丁酸的氧化脱氢反应
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摘要
Methacrylic acid is produced by subjecting isobutyric acid to oxidative dehydrogenation in a gaseous phase in the presence of a catalyst contg. heteropoly-acid of formula: H3+xMo12-x-yWyVxPO40, (where x is 0,1,2 or 3; and y is 0,1,2 or 3; anx x + y 5) and/or its reduced type, and a carrier contg. a relatively large amt. of silicic acid so that the water absorption is =60% is employed. Examples of carriers contg. relatively large amt. of silicic acid are silica-gel, diatomaceous earth. The ratio of isobutyric acid to oxygen = 0.1-10, concentration of isobutyric acid = 0.1-10 vol. %, temp. is 200-450 degrees C and LHSV - 100-8000 hr-1. The isobutyric acid conversion rate is 56.0-60.2%, methacrylic acid selectivity rate is 70.0-65.0%.
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机译：甲基丙烯酸是通过在催化剂存在下将异丁酸在气相中进行氧化脱氢而制得的。分子式为：H3 + xMo12-x-yWyVxPO40的杂多酸（其中x为0,1,2或3; y为0,1,2或3; anx x + y 5）和/或其还原型，和承运人续订。相对较大的amt。使用10％的硅酸，使得吸水率≥60％。承运人的例子续相对较大的amt。硅酸是硅胶，硅藻土。异丁酸与氧气的比率＝ 0.1-10，异丁酸的浓度＝ 0.1-10vol。 ％，温度是200-450摄氏度和LHSV-100-8000 hr-1。异丁酸的转化率为56.0-60.2％，甲基丙烯酸的选择性率为70.0-65.0％。
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