Process for producing methacrylic acid by oxidative dehydration of
isobutyric acid and catalyst therefor
    1.
    发明授权
    Process for producing methacrylic acid by oxidative dehydration of isobutyric acid and catalyst therefor 失效
    通过异丁酸及其催化剂的氧化脱水生产甲基丙烯酸的方法

    公开(公告)号:US4370490A

    公开(公告)日:1983-01-25

    申请号:US297279

    申请日:1981-08-28

    摘要: Isobutyric acid is oxidatively dehydrogenated to methacrylic acid by passing a gaseous mixture of isobutyric acid, oxygen, nitrogen and optionally water vapor at temperatures of 300.degree.-450.degree. C. and pressures of 0.5 to 5 bar over a catalyst comprising molybdenum oxide, which also contains vanadium, phosphorous and a metal selected from the group consisting of alkali metals, alkaline earth metals, zinc, silver, aluminum, titanium, lead, manganese, iron, cobalt, nickel and tin, preferably precipitated on a solid silica support and calcined at 200.degree. to 400.degree. C. At conversion levels of 80 to 100% of the isobutyric acid used, a methacrylic acid selectivity of 60 to 74% is attained.

    摘要翻译: 通过使含有氧化钼的催化剂在300-450℃的温度和0.5-5巴的压力下通过异丁酸,氧气,氮气和任选的水蒸汽的气体混合物将异丁酸氧化脱氢成甲基丙烯酸, 含有选自碱金属,碱土金属,锌,银,铝,钛,铅,锰,铁,钴,镍和锡的钒,磷和金属,优选在固体二氧化硅载体上沉淀并在 200〜400℃。当使用的异丁酸的转化率为80〜100%时,甲基丙烯酸的选择性达到60〜74%。

    Method for making cyanogen chloride
    4.
    发明授权
    Method for making cyanogen chloride 失效
    制造氯化氰的方法

    公开(公告)号:US3976754A

    公开(公告)日:1976-08-24

    申请号:US607599

    申请日:1975-08-25

    IPC分类号: C01C3/00 C01B21/18

    CPC分类号: C01C3/004

    摘要: A method for making cyanogen chloride which comprises passing an approximately equimolar mixture of dicyan and chlorine over a charcoal catalyst at a temperature between 500.degree.C. and 950.degree.C. at a space velocity between 1000 and 10000 liters, measured at room temperature, per liter of catalyst and per hour.

    摘要翻译: 一种制备氯化氰的方法,其包括在500℃和950℃之间的温度下,在室温下测量的空气速度,在室温下测量二氰和氯的大约等摩尔的混合物,在一个木炭催化剂上, 升催化剂和每小时。

    Method for the oxidative dehydrogenation of isobutyric acid
    8.
    发明授权
    Method for the oxidative dehydrogenation of isobutyric acid 失效
    异丁酸氧化脱氢方法

    公开(公告)号:US4081465A

    公开(公告)日:1978-03-28

    申请号:US733326

    申请日:1976-10-18

    CPC分类号: C07C51/377

    摘要: In a method for the oxidative dehydrogenation of isobutyric acid in the gas phase, in the presence of oxygen and water vapor at a temperature from 300.degree. C. - 500.degree. C., and in the presence of a solid catalyst, the improvement wherein said catalyst initially consists essentially of at least one member selected from the group consisting of elemental molybdenum, elemental tungsten, molybdenum trioxide, and tungsten trioxide.

    摘要翻译: 在气相中氧化脱氢异丁酸的方法中,在氧气和水蒸气存在下,在300℃〜500℃的温度下,在固体催化剂存在下,其中所述 催化剂最初基本上由选自元素钼,元素钨,三氧化钼和三氧化钨组成的组中的至少一种组成。