Oxydehydrogenation of isobutyric acid and its lower alkyl esters
    91.
    发明授权
    Oxydehydrogenation of isobutyric acid and its lower alkyl esters 失效
    异丁酸及其低级烷基酯的氧化脱氢

    公开(公告)号:US4434298A

    公开(公告)日:1984-02-28

    申请号:US319172

    申请日:1981-11-09

    CPC分类号: C07C51/377

    摘要: Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding .alpha.,.beta.-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The catalyst is composed of the calcined mixture of salts of titanium and iron.

    摘要翻译: 异丁酸或其低级烷基酯在气相中被氧化脱氢,通过在分子氧存在下与非均相催化剂接触产生相应的α,β-烯属不饱和衍生物。 催化剂由煅烧钛和铁的混合物组成。

    Oxydehydrogenation of isobutyric acid and its lower alkyl esters
    92.
    发明授权
    Oxydehydrogenation of isobutyric acid and its lower alkyl esters 失效
    异丁酸及其低级烷基酯的氧化脱氢

    公开(公告)号:US4410727A

    公开(公告)日:1983-10-18

    申请号:US355828

    申请日:1982-03-08

    CPC分类号: B01J27/1853 C07C51/377

    摘要: Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase to produce the corresponding alpha, beta-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of oxygen. The catalyst has the empirical formula Fe.sup.II Fe.sub.2.sup.III (PO.sub.4).sub.2.(OH).sub.2 which can exist in the form of Barbosalite and/or Lipscombite.

    摘要翻译: 异丁酸或其低级烷基酯在气相中被氧化脱氢,以在氧的存在下与非均相催化剂接触产生相应的α,β-烯属不饱和衍生物。 催化剂具有经验式FeIIFe2III(PO4)2(OH)2,其可以以Barbosalite和/或Lipscomite的形式存在。

    Oxydehydrogenation of isobutyric acid and its lower alkyl esters
    93.
    发明授权
    Oxydehydrogenation of isobutyric acid and its lower alkyl esters 失效
    异丁酸及其低级烷基酯的氧化脱氢

    公开(公告)号:US4391990A

    公开(公告)日:1983-07-05

    申请号:US319354

    申请日:1981-11-09

    CPC分类号: B01J23/30 C07C51/377

    摘要: Isobutyric acid or a lower alkyl ester thereof is oxidatively dehydrogenated in the vapor phase producing the corresponding .alpha.,.beta.-olefinically unsaturated derivative by contact with a heterogeneous catalyst in the presence of molecular oxygen. The catalyst is composed of the calcined oxides of uranium and tungsten.

    摘要翻译: 异丁酸或其低级烷基酯在气相中被氧化脱氢,通过在分子氧存在下与非均相催化剂接触产生相应的α,β-烯属不饱和衍生物。 催化剂由煅烧氧化铀和钨组成。

    Method of regeneration of an iron phosphate-type catalyst
    95.
    发明授权
    Method of regeneration of an iron phosphate-type catalyst 失效
    磷酸铁型催化剂再生方法

    公开(公告)号:US4359401A

    公开(公告)日:1982-11-16

    申请号:US228303

    申请日:1981-01-26

    CPC分类号: B01J27/285

    摘要: A method of regenerating an iron/phosphate-type catalyst typically used for the oxydehydrogenation of lower molecular weight carboncylic acids comprising the step of subjecting the catalyst to an oxidizing atmosphere, preferably by discontinuing the flow of organic feed through the catalyst bed, followed by the step of subjecting the catalyst to a reducing atmosphere, preferably injecting organic feed in the absence of oxygen over the catalyst. The method is specifically described with respect to the production of methacrylic acid by the oxydehydrogenation of isobutyric acid.

    摘要翻译: 一种通常用于低分子量碳酸的氧化脱氢的铁/磷酸盐型催化剂的再生方法,包括使催化剂经历氧化气氛,优选通过中止通过催化剂床的有机进料流动的步骤,接着是 将催化剂进行还原气氛,优选在不存在氧的情况下在催化剂上注入有机进料的步骤。 关于通过异丁酸的氧化脱氢生产甲基丙烯酸,具体描述了该方法。

    Process for the production of unsaturated acids
    97.
    发明授权
    Process for the production of unsaturated acids 失效
    生产不饱和酸的方法

    公开(公告)号:US4260822A

    公开(公告)日:1981-04-07

    申请号:US956011

    申请日:1978-10-30

    摘要: A process for the direct oxidation of isobutane or propane to methacrylic acid or acrylic acid respectively is disclosed. The process encompasses contacting a feed gas containing isobutane or propane and oxygen with a specific catalyst which is composed of molybdenum, antimony and phosphorus combined with oxygen. The atomic ratio of molybdenum to antimony to phosphorous is from about 9 to about 24; about 0.25 to about 2; and about 0.75 to about 2 respectively. The catalytic oxidation to methacrylic or acrylic acid is accomplished at a temperature of from about 200.degree. C. to about 450.degree. C. The methacrylic or acrylic acid is removed from the feed gases exiting from the reaction zone and the remainder of the exited feed stream may be recycled to again contact the catalyst.

    摘要翻译: 公开了将异丁烷或丙烷直接氧化成甲基丙烯酸或丙烯酸的方法。 该方法包括使含有异丁烷或丙烷和氧气的进料气体与由氧,锑和磷组合的特定催化剂接触。 钼与锑对磷的原子比为约9至约24; 约0.25至约2; 和约0.75至约2。 甲基丙烯酸或丙烯酸的催化氧化在约200℃至约450℃的温度下进行。甲基丙烯酸或丙烯酸从离开反应区的进料气体中除去,剩余的进料流 可以再循环再次接触催化剂。

    Process for producing acrylic acid from propylene
    98.
    发明授权
    Process for producing acrylic acid from propylene 失效
    由丙烯生产丙烯酸的方法

    公开(公告)号:US4147885A

    公开(公告)日:1979-04-03

    申请号:US775286

    申请日:1977-03-07

    CPC分类号: C07C45/35 C07C51/252

    摘要: A process for producing acrylic acid from propylene through acrolein as an intermediate by catalytic vapor phase oxidation, which comprises passing a starting reactant gas mixture containing propylene, a molecular oxygen-containing gas and steam through a first-stage reactor packed with a molybdenum-containing multi-component catalyst, passing the resulting acrolein-containing gas through a second-stage reactor packed with a multi-component catalyst containing vanadium and molybdenum, introducing the resulting acrylic acid-containing gas to an acrylic acid collector thereby to recover acrylic acid in the form of an aqueous solution, and incorporating a part of the exhaust gas from the collector in the starting reactant gas mixture.

    摘要翻译: 一种由丙烯通过丙烯醛作为中间体通过催化气相氧化制备丙烯酸的方法,其包括将含有丙烯,含分子氧的气体和蒸汽的起始反应气体混合物通过填充有含钼的第一级反应器 将所得含丙烯醛的气体通过填充有含有钒和钼的多组分催化剂的第二级反应器,将所得含丙烯酸的气体引入丙烯酸收集器中,从而回收丙烯酸 形式的水溶液,并且在起始反应气体混合物中引入来自收集器的一部分废气。