利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

112 条记录 (耗时 0.019 秒)

    Process for producing methacrolein
    2.
    发明授权
    Process for producing methacrolein 失效
    生产异丁烯醛的方法

    公开(公告)号：US4217309A

    公开(公告)日：1980-08-12

    申请号：US15903

    申请日：1979-02-28

    申请人： Sumio Umemura ,  Kyoji Ohdan ,  Kenichi Suzuki ,  Yasuo Bando ,  Terumi Hisayuki

    发明人： Sumio Umemura ,  Kyoji Ohdan ,  Kenichi Suzuki ,  Yasuo Bando ,  Terumi Hisayuki

    IPC分类号： B01J23/887 ,  B01J23/89 ,  C07C5/48 ,  C07C45/35 ,  C07C45/04

    CPC分类号： C07C5/48 ,  B01J23/8877 ,  B01J23/8993 ,  C07C45/35 ,  B01J2523/00

    摘要： Methacrolein is produced in a high yield by catalytically oxidizing isobutylene at a temperature of from 250.degree. to 500.degree. C. by using a catalyst represented by the formula:Mo.sub.a Co.sub.b Fe.sub.c Bi.sub.d Cs.sub.e X.sub.f Y.sub.g O.sub.hwherein X is either both vanadium and palladium, Y is at least one member selected from titanium, nickel, tin and zirconium, a=12, b=2-12, c=0.5-7, d=0.1-5, e=0.0005-0.5, f=0.01-2, g=0-5 and h is a positive number proportional to the number of oxygen atoms satisfying the average valency of the metal atoms stated in the formula, which catalyst has a high resistance to compression and abrasion and exhibits a high catalytic efficiency, mechanical strength and durability.

    摘要翻译： 通过使用由式MoaCobFecBidCseXfYgOh表示的催化剂，在250℃至500℃的温度下催化氧化异丁烯，以高产率生产甲基丙烯醛，其中X既是钒又是钯，Y是至少一种选自 钛，镍，锡和锆，a = 12，b = 2-12，c = 0.5-7，d = 0.1-5，e = 0.0005-0.5，f = 0.01-2，g = 0-5，h为 与氧原子数成比例的正数，其满足式中金属原子的平均价，该催化剂具有高抗压缩和耐磨性，并且具有高催化效率，机械强度和耐久性。

    Oxidation of olefins
    4.
    发明授权
    Oxidation of olefins 失效
    烯烃的氧化

    公开(公告)号：US4186152A

    公开(公告)日：1980-01-29

    申请号：US821315

    申请日：1977-08-02

    申请人： Haruhisa Yamamoto ,  Shinichi Akiyama

    发明人： Haruhisa Yamamoto ,  Shinichi Akiyama

    IPC分类号： C07C27/14 ,  B01J23/88 ,  B01J23/89 ,  B01J27/198 ,  B01J27/199 ,  B01J37/02 ,  C07B61/00 ,  C07C27/00 ,  C07C45/00 ,  C07C45/35 ,  C07C47/22 ,  C07C51/00 ,  C07C57/055 ,  C07C67/00 ,  C07C45/04

    CPC分类号： B01J23/887 ,  B01J23/8993 ,  B01J37/0236 ,  C07C45/35 ,  B01J2523/00

    摘要： A catalyst for oxidation of olefins which has a composition of the general formulaMo.sub.a Bi.sub.b Fe.sub.c Co.sub.d Ni.sub.e Be.sub.f Q.sub.g R.sub.h X.sub.i O.sub.jwherein Q is at least one element selected from K, Rb, Cs and Tl; R is at least one element selected from P, As and B; X is at least one element selected from Ce, Ti, Te, Zn, Ge, Sn, Cr, Ga, La, In, Al, Cd, Pd, Mn, V, Pb, Nb, Ag, Zr, Cu, Nd and U; a, b, c, d, e, f, g, h and i respectively represent the numbers of Mo, Bi, Fe, Co, Ni, Be, Q, R and X atoms, and when a is 12, b is 0.1-10, c is 0.5-40, d is 0-12, e is 0-12 with the proviso that the sum of d and e is 0.5-15, f is 0.1-35, g is 0.01-5, h is 0-5, i is 0-12; and j is the number of oxygen atoms which satisfies the atomic valences of the other elements.Unsaturated aldehydes can be prepared in a high selectivity and a high one-pass yield by oxidizing olefins containing 3 carbon atoms in the straight chain in the vapor phase in the presence of the aforesaid catalyst at a temperature of 250.degree. to 700.degree. C.

    摘要翻译： 用于烯烃氧化的催化剂，其具有通式为MoaBibFecCodNieBefQgRhXiOj的组成，其中Q为选自K，Rb，Cs和T1中的至少一种元素; R是选自P，As和B中的至少一种元素; X是选自Ce，Ti，Te，Zn，Ge，Sn，Cr，Ga，La，In，Al，Cd，Pd，Mn，V，Pb，Nb，Ag，Zr，Cu，Nd中的至少一种元素， U; a，b，c，d，e，f，g，h和i分别表示Mo，Bi，Fe，Co，Ni，Be，Q，R和X原子的数，当a为12时，b为0.1 -10，c为0.5-40，d为0-12，e为0-12，条件是d和e的和为0.5-15，f为0.1-35，g为0.01-5，h为0 -5，我是0-12; 并且j是满足其它元素的原子价的氧原子数。 在上述催化剂存在下，在250〜700℃的温度下，通过在蒸气相中在直链中含有3个碳原子的烯烃进行氧化，可以高选择性和高一次收率制备不饱和醛。

    Process for producing methacrylic acid from isobutylene by two step oxidation
    7.
    发明授权
    Process for producing methacrylic acid from isobutylene by two step oxidation 失效
    通过两步氧化从异丁烯生产甲基丙烯酸的方法

    公开(公告)号：US4124634A

    公开(公告)日：1978-11-07

    申请号：US775427

    申请日：1977-03-08

    申请人： Isao Gotoh ,  Junji Endoh ,  Tohru Ueno

    发明人： Isao Gotoh ,  Junji Endoh ,  Tohru Ueno

    IPC分类号： C07C45/35 ,  C07C51/25 ,  C07C51/44 ,  C07C45/04 ,  C07C51/32

    CPC分类号： C07C51/252 ,  C07C45/35 ,  C07C51/44 ,  Y02P20/582

    摘要： In a process for producing methacrylic acid by two step oxidation comprising a first oxidation step of producing methacrolein by reacting isobutylene with molecular oxygen in the presence of a diluent gas and a catalyst, and a second oxidation step of producing methacrylic acid by reacting methacrolein with molecular oxygen in the presence of a diluent gas and a catalyst, the improvement comprises using nitrogen as the diluent gas in the first oxidation step and nitrogen and steam as the diluent gas in the second oxidation step, mixing the reaction products obtained in the first and second oxidation steps, separating and recovering methacrolein and methacrylic acid from the mixture and feeding the recovered methacrolein back into the second oxidation step as a starting material.

    摘要翻译： 在通过两步氧化制备甲基丙烯酸的方法中，包括在稀释气体和催化剂的存在下使异丁烯与分子氧反应制备甲基丙烯醛的第一氧化步骤，以及通过使甲基丙烯醛与分子反应生产甲基丙烯酸的第二氧化步骤 在稀释气体和催化剂存在下的氧气，改进包括在第一氧化步骤中使用氮气作为稀释气体，在第二氧化步骤中使用氮气和蒸汽作为稀释气体，将在第一和第二氧化步骤中获得的反应产物混合 氧化步骤，从混合物中分离和回收甲基丙烯醛和甲基丙烯酸，并将回收的甲基丙烯醛反馈回第二氧化步骤作为起始原料。