Process for the preparation of vinyl acetate catalyst
    3.
    发明授权
    Process for the preparation of vinyl acetate catalyst 失效
    乙酸乙烯酯催化剂的制备方法

    公开(公告)号:US5536693A

    公开(公告)日:1996-07-16

    申请号:US252800

    申请日:1994-06-02

    摘要: A process of producing a fluid bed oxacylation catalyst for olefins and diolefins having the following formula Pd-M-A whereM=Au, Cd, Bi, Cu, Mn, Fe, Co, Ce, U and mixtures thereof,A=an alkali metal or mixture thereof, andM is present in the range of from 0 to 5 wt %, comprising milling a fixed bed oxacylation catalyst precursor comprising Pd-M on a fixed support with a fluid bed catalyst aqueous binder material to form a uniform aqueous slurry, drying the aqueous slurry to remove the water to form microspheroidal particles of solid fluid bed catalyst precursor, impregnating the microspheroidal particles with a solution of alkali metal salt to form the fluid bed catalyst. The catalyst is particularly useful in the manufacture of vinyl acetate from ethylene, acetic acid and oxygen.

    摘要翻译: 制备具有下式Pd-MA的烯烃和二烯烃的流化床氧化催化剂的方法,其中M = Au,Cd,Bi,Cu,Mn,Fe,Co,Ce,U及其混合物,A =碱金属或 M的存在量为0至5重量%,包括在固定载体上用流化床催化剂水性粘合剂材料研磨包含Pd-M的固定床氧化酰基化催化剂前体以形成均匀的含水浆料,干燥 该含水浆料除去水以形成固体流化床催化剂前体的微球形颗粒,用碱金属盐溶液浸渍微球颗粒以形成流化床催化剂。 该催化剂特别可用于从乙烯,乙酸和氧气制备乙酸乙烯酯。

    Catalyst for the manufacture of acrylonitrile
    9.
    发明授权
    Catalyst for the manufacture of acrylonitrile 有权
    用于制造丙烯腈的催化剂

    公开(公告)号:US07348291B2

    公开(公告)日:2008-03-25

    申请号:US10717846

    申请日:2003-11-19

    IPC分类号: B01J23/28 C07C253/24

    摘要: A catalyst comprising a complex of catalytic oxides comprising potassium, cesium, cerium, chromium, cobalt, nickel, iron, bismuth, molybdenum, wherein the relative ratios of these elements is represented by the following general formula AaKbCscCedCreCofNigXhFeiBijMo12Ox wherein A is Rb, Na, Li, Tl, or mixtures thereof, X is P, Sb, Te, B, Ge, W, Ca, Mg, a rare earth element, or mixtures thereof, a is 0 to about 1, b is about 0.01 to about 1, c is about 0.01 to about 1, d is about 0.01 to about 3, e is about 0.01 to about 2, f is about 0.01 to about 10, g is about 0.1 to about 10, h is 0 to about 4, i is about 0.1 to about 4, j is about 0.05 to about 4, x is a number determined by the valence requirements of the other elements present, and wherein the catalyst is substantially free of manganese and zinc. The catalyst is useful in processes for the ammoxidation of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile and mixtures thereof, respectively.

    摘要翻译: 一种催化剂,其包含包含钾,铯,铈,铬,钴,镍,铁,铋,钼的催化氧化物的络合物,其中这些元素的相对比例由以下通式表示: “In-line Formulas”end =“lead”?> A C C H<<<<<< α-in-line-formula description =“In-line Formulas”end =“tail”?>其中A是Rb,Na, Li,Tl或其混合物,X为P,Sb,Te,B,Ge,W,Ca,Mg,稀土元素或其混合物,a为0至约1,b为约0.01至约1, c为约0.01至约1,d为约0.01至约3,e为约0.01至约2,f为约0.01至约10,g为约0.1至约10,h为0至约4,i为约 0.1至约4,j为约0.05至约4,x为由存在的其它元素的化合价要求确定的数, 并且其中所述催化剂基本上不含锰和锌。 该催化剂可用于分别选自丙烯,异丁烯或其混合物的烯烃与丙烯腈,甲基丙烯腈及其混合物的氨氧化反应的方法。

    In situ modification of molybdenum-based catalysts
    10.
    发明申请
    In situ modification of molybdenum-based catalysts 有权
    钼基催化剂的原位改性

    公开(公告)号:US20070260085A1

    公开(公告)日:2007-11-08

    申请号:US11415565

    申请日:2006-05-02

    IPC分类号: C07C253/34

    摘要: A process for the conversion of a hydrocarbon selected from the group consisting of propylene, isobutylene, propane, isobutane or mixtures thereof, to acrylonitrile, methacrylonitrile, or mixtures thereof, the process comprising the step of reacting in the vapor phase at an elevated temperature and pressure said hydrocarbon with a molecular oxygen-containing gas and ammonia, in the presence of a molybdenum-based ammoxidation catalyst and a catalyst modifier, wherein said catalyst modifier comprises a molybdate or a polymolybdate of at least one element M selected from the group consisting of cesium, rubidium, potassium, sodium, thallium, lithium, nickel, cobalt, iron, chromium, copper, magnesium, manganese, cerium and phosporus, and wherein the ratio of the M elements to Mo in the molybdate or polymolybdate is greater than the ratio for these M elements to Mo in the molybdenum-based catalyst. The catalyst modifier is useful in modifying the performance of molybdenum-based catalyst and inhibiting molybdenum oxide loss for such catalysts.

    摘要翻译: 一种将选自丙烯,异丁烯,丙烷,异丁烷或其混合物的烃转化为丙烯腈,甲基丙烯腈或其混合物的方法,该方法包括在升高的温度下在气相中反应和 在钼基氨氧化催化剂和催化剂改性剂的存在下,用含分子氧的气体和氨压力所述烃,其中所述催化剂改性剂包含选自以下的至少一种元素M的钼酸盐或多钼酸盐: 铯,铷,钾,钠,铊,锂,镍,钴,铁,铬,铜,镁,锰,铈和磷,并且其中钼酸盐或多钼酸盐中的M元素与Mo的比例大于 对于这些M元素在钼基催化剂中的Mo。 催化剂改性剂可用于改性钼基催化剂的性能并抑制这种催化剂的氧化钼损失。