摘要:
Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of bismuth, molybdenum, iron, nickel and magnesium, at least one element selected from the group comprising potassium and cesium, and optionally one element selected from the group comprising cobalt, phosphorus, manganese, tellurium, sodium, cerium, chromium, antimony and tungsten wherein the sum of cesium and potassium is at least 0.1 to 0.4.
摘要:
A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum, cobalt, cerium, antimony, at least one of nickel or magnesium, and at least one of lithium, sodium, potassium, rubidium, or thallium, and characterized by the following empirical formula: AaBbCcFedBieCofCegSbhMomOx wherein A is at least one of Cr, P, Sn, Te, B, Ge, Zn, In, Mn, Ca, W, or mixtures thereof B is at least one of Li, Na, K, Rb, Cs, Tl, or mixtures thereof C is least one of Ni, Mg or mixtures thereof a is 0 to 4.0 b is 0.01 to 1.5 c is 1.0 to 10.0 d is 0.1 to 5.0 e is 0.1 to 2.0 f is 0.1 to 10.0 g is 0.1 to 2.0 h is 0.1 to 2.0 m is 12.0 to 18.0 and x is a number determined by the valence requirements of the other elements present. 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:一种催化剂组合物,其包含铁,铋,钼,钴,铈,锑,镍或镁中的至少一种和锂,钠,钾,铷或铊中的至少一种的催化氧化物的络合物,其特征在于 以下经验公式:<?in-line-formula description =“In-line Formulas”end =“lead”?> A b> B b> C < >>>>>>>>>>>>>>>>>>>>>>>>> <<<<<<<<<<<<<<<<<<<<<<<<< 其中A是Cr,P,Sn中的至少一种,其中A是至少一个Cr,P,Sn ,Te,B,Ge,Zn,In,Mn,Ca,W或其混合物B是Li,Na,K,Rb,Cs,Tl或其混合物中的至少一种,或其混合物。C是Ni,Mg或 其混合物a为0〜4.0b为0.01〜1.5c为1.0〜10.0d为0.1〜5.0e为0.1〜2.0f为0.1〜10.0g为0.1〜2.0h为0.1〜2.0μm为12.0〜18.0,x为 一个数字由其他元素的价格要求确定。 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。
摘要:
A process for the substantial or complete elimination of ammonium sulfate generated during the production of acrylonitrile by the direct ammoxidation of propylene/propane, ammonia and an oxygen containing gas (e.g. air) over a fluid bed catalyst wherein the improvement comprises introducing methanol into said reactor in the upper portion of the reactor at a location where the methanol reacts with at least a portion if not substantially all of the excess ammonia without affecting the acrylonitrile yield. Preferably, methanol is introduced into the reactor at below its coking temperature. In particular, when an oxygen lean fluid bed catalyst is utilized, an additional oxygen containing gas is introduced into the reaction at a distance between about 8 to 14 inches from the methanol feed location.
摘要:
A process for the substantial or complete elimination of ammonium sulfate generated during the production of acrylonitrile by the direct ammoxidation of propylene/propane, ammonia and an oxygen containing gas (e.g. air) over a fluid bed catalyst wherein the improvement comprises introducing an organic compound(s) into said reactor at a location where the compound(s) reacts with substantially all of the excess ammonia without affecting the acrylonitrile yield. Preferably, the organic compound is methanol which is introduced into the reactor at below its coking temperature.
摘要:
Disclosed is a method for ammoxidizing C.sub.3 to C.sub.5 mono-olefins to .alpha.,.beta.-mono-unsaturated acyclic nitriles having 3 to 5 carbon atoms and HCN by introducing such mono-olefins molecular oxygen and ammonia into a reaction zone into vapor phase contact with a solid ammoxidation catalyst, wherein the mol ratio of introduced molecular oxygen and ammonia to said introduced mono-olefin is at least 1.5 and 1.0, respectively, wherein said catalyst contains the elements and proportions indicated by the empirical formula:V1Sb.sub.a M.sub.m N.sub.n O.sub.xwherea=0.5 to 2M=one or more of: Sn, Ti, Fe, and Gam=0.05 to 3, usually at least 0.1 and at most 1N=one or more of: W, Bi, Mo, Li, Mg, P, Zn, Mn, Te, Ge, Nb, Zr, Cr, Al, Cu, Ce, Bn=0.0 to 0.5,and wherein the preparation of the catalyst includes contacting in an aqueous dispersion a vanadium compound and an antimony compound while said vanadium is in solution.
摘要翻译:公开了一种通过将这种单烯烃分子氧和氨引入反应区中与C3- C5单烯烃氧化成具有3至5个碳原子的α,β-单不饱和非环状腈和HCN的气相接触方法 固体氨氧化催化剂,其中引入的分子氧和氨与所述引入的单烯烃的摩尔比分别为至少1.5和1.0,其中所述催化剂含有以下经验式所示的元素和比例:V1SbaMmNnOx其中a = 0.5至2 M = Sn,Ti,Fe和Ga中的一种或多种:m = 0.05〜3,通常为0.1以上且1N以下= W,Bi,Mo,Li,Mg,P,Zn, Mn,Te,Ge,Nb,Zr,Cr,Al,Cu,Ce,B n = 0.0〜0.5,其中催化剂的制备包括在水分散体中使钒化合物与锑化合物接触, 解。
摘要:
A process of producing hydrogen cyanide from crude acetonitrile comprising contacting the crude acetonitrile with an ammoxidation catalyst at an elevated temperature in the presence of an oxygen containing gas and ammonia. Preferably, the process is performed in the absence of propylene.
摘要:
Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of bismuth, molybdenum, iron, nickel and magnesium, at least one element selected from the group comprising potassium and cesium, and optionally one element selected from the group comprising cobalt, phosphorus, manganese, tellurium, sodium, cerium, chromium, antimony and tungsten wherein the sum of cesium and potassium is at least 0.1 to 0.4.
摘要:
A catalyst composition comprising a complex of catalytic oxides of iron, bismuth, molybdenum, cobalt, cerium, antimony, at least one of nickel or magnesium, and at least one of lithium, sodium, potassium, rubidium, or thallium, and characterized by the following empirical formula: AaBbCcFedBieCofCegSbhMomOx wherein A is at least one of Cr, P, Sn, Te, B, Ge, Zn, In, Mn, Ca, W, or mixtures thereof B is at least one of Li, Na, K, Rb, Cs, Tl, or mixtures thereof C is least one of Ni, Mg or mixtures thereof a is 0 to 4.0 b is 0.01 to 1.5 c is 1.0 to 10.0 d is 0.1 to 5.0 e is 0.1 to 2.0 f is 0.1 to 10.0 g is 0.1 to 2.0 h is 0.1 to 2.0 m is 12.0 to 18.0 and x is a number determined by the valence requirements of the other elements present. 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:
Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of bismuth, molybdenum, iron, nickel and magnesium, at least one element selected from the group comprising potassium and cesium, and optionally one element selected from the group comprising cobalt, phosphorus, manganese, tellurium, sodium, cerium, chromium, antimony and tungsten wherein the sum of cesium and potassium is at least 0.1 to 0.4
摘要:
Disclosed is a process f9or making an .alpha., .beta.-unsaturated mononitrile by the catalytic reaction of a paraffin containing 3-5 carbon atoms with molecular oxygen and ammonia by catalytic contact of the foregoing reactants in a reaction zone with a metal oxide catalyst composition that has 10-90 weight percent of a diluent/support and 90-10 weight percent of a catalyst containing the elements indicated by the empirical formula,A.sub.a D.sub.d Bi.sub.c Fe.sub.f Mo.sub.12 O.sub.xin the proportions indicated by the said formula, said diluent/support containing 10 to 100 weight percent Al.sub.2 O.sub.3 and zero to 90 weight percent SiO.sub.2 whereinA is one or more of Li, Na, K, Rb, Cs, Tl B, W, Sn and La;D is one or more of Cr, Sb, Pb, P, Cu, Ni, Co, Mn and Mg;a is zero to 10;c is 0.1 to 10;d is zero to 10; andf is 0.2 to 10; andwherein the reactants fed to the reaction zone contain a mole ratio of said paraffin:NH.sub.3 in the range from 2 to 16 and a mole ratio of said paraffin to O.sub.2 in the range from 1 to 10.