摘要:
Maleic acid, maleic anhydride or other hydrogenatable precursor are catalytically hydrogenated to 1,4-butanediol and tetrahydrofuran. It has been discovered that high yields of 1,4-butanediol are achieved when the hydrogenation catalyst comprises palladium, silver and rhenium on a carbon support and is prepared by the steps of(i) impregnating a carbon support with a source of palladium, silver and rhenium, wherein the source of palladium, silver and rhenium is at least one solution,(ii) after each impregnation step, drying the impregnated carbon support to remove solvent,(iii) heating the impregnated carbon support at a temperature of about 120.degree. C. to about 350.degree. C. under reducing conditions.The palladium in the catalyst is present in the form of crystallites having a particle size of less than 10 nm.
摘要:
A process is provided for the production of aliphatic acetate esters and gaseous alkanes comprising contacting acetic acid and synthesis gas in the vapor phase at elevated temperature and pressure in the presence of a catalyst containing the mixed oxides of ruthenium and nickel, and optionally an alkali metal oxide and the oxides of cobalt, cadmium, zinc or mixtures thereof. Other carboxylic acids may be substituted for acetic acid as desired.
摘要:
The present invention relates to a process for the conversion of tertiary-butyl-containing compounds to methacrylic derivatives, and more particularly to a process for the conversion of tertiary-butyl-containing compounds selected from the group consisting of alkyl tertiary-butyl ethers, tertiary-butyl alcohol, isobutylene dimer (2,2,4-trimethylpentene) and isobutylene trimer, to methacrolein, methacrylic acid or methacrylonitrile.
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 method of preparing a V.sub.a Sb.sub.b M.sub.m N.sub.n O.sub.x catalyst useful in the ammoxidation of a C.sub.2 -C.sub.5 hydrocarbon to its corresponding .alpha., .beta. unsaturated nitrile comprising heating an aqueous mixture comprising V.sub.2 O.sub.5 and Sb.sub.2 O.sub.3 at a temperature above about 100.degree. to 250.degree. C., preferably 110.degree. to 175.degree. C., most preferably 120.degree. to 160.degree. C., under autogenous pressure with agitation to form a catalyst precursor, drying the catalyst precursor and calcining the catalyst precursor to form the finished catalyst.
摘要翻译:制备可用于将C2-C5烃氨氧化成其相应的α,β不饱和腈的VaSbbMmNnOx催化剂的方法,包括在高于约100℃至250℃,优选110℃的温度下加热包含V 2 O 5和Sb 2 O 3的含水混合物 至175℃,最优选120℃至160℃,在自生压力下搅拌以形成催化剂前体,干燥催化剂前体并煅烧催化剂前体以形成最终催化剂。
摘要:
Certain multiply promoted Sn-Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolefins.
摘要:
Molybdenum-promoted antimony phosphates also containing at least one of tellurium and bismuth have been found to exhibit significant catalytic activity in various oxidation-type reactions.
摘要:
An oxydehydrogenation process for producing indene and substituted indenes from indene precursors more saturated than indene is described and comprises contacting said precursor with oxygen and a catalyst comprising cobalt oxide and molybdenum oxide at an elevated temperature above about 300.degree. C. Preferably the reaction is conducted at a temperature of about 500.degree.-650.degree. C. for a period of from 0.1 to about 30 seconds.