摘要:
Acrylonitrile is produced from propylene in an excellent percent conversion of propylene, percent selectivity to acrylonitrile and percent yield of acrylonitrile, by bringing, at an elevated temperature, a reaction feed containing propylene, molecular oxygen and ammonia, each in gas phase, into contact with a catalyst consisting essentially of an oxide composition of the empirical formula:Mo.sub.a Co.sub.b Ni.sub.c Fe.sub.d Bi.sub.e X.sub.d Ti.sub.g O.sub.hwherein X represents at least one atom of an element selected from vanadium and tellurium; the subscripts a, b, c, d, e, f and g respectively denote the numbers of the respective atoms of the elements, the ratio a:b:c:d:e:f:g being in the range of 10:0 to 10:0 to 10:1 to 7:0.08 to 1.1:0.01 to 1:1 to 15, and the ratio of a to the sum of b and c being in a range of 10:3 to 10, and; the subscript h represents the number of oxygen atoms which satisfies the average valency of the elements, the ratio a:h being in a range of 10:36.7 to 84.1.
摘要:
Acrylonitrile can be produced in a high yield by the catalytical ammoxidation of propylene at an elevated temperature, preferably of 330.degree. to 470.degree. C, in the presence of a new type of catalyst consisting of an oxide composition of the empirical formula: Mo.sub.a Co.sub.b Fe.sub.c Bi.sub.d X.sub.e O.sub.f wherein X denotes at least one atom of an element selected from vanadium and tellurium and wherein the ratio a:b:c:d:e:f is in a range of 10:3 to 10:1 to 7:0.1 to 0.7:0.01 to 1:34.6 to 54.1, said catalyst being prepared by providing an aqueous mixture containing molybdenum-, cobalt- and iron-containing compounds, bismuth-containing compound, and vanadium-or tellurium-containing compound, converting the aqueous mixture into a dried solid mixture and calcining the solid mixture at a temperature of at least 500.degree. C.
摘要:
Acrylonitrile can be catalytically produced with a high yield by bringing, at an elevated temperature, preferably of 300.degree. to 470.degree. C., a reaction feed containing propylene, ammonia and molecular oxygen into contact with a catalyst consisting of an oxide composition of the empirical formula: Mo.sub.a Co.sub.b Fe.sub.c X.sub.d O.sub.e wherein X denotes at least one atom of an element selected from phosphorus, arsenic, antimony and bismuth and wherein the ratio a:b:c:d:e is in a range of 12:4 to 9:1 to 5:0.01 to 0.07:39.5 to 52.7, said catalyst being prepared by providing an aqueous mixture containing molybdenum-, cobalt- and iron-containing compounds and a phosphorus-, arsenic-, antimony- or bismuth-containing compound, converting the aqueous mixture into a dried solid mixture and calcining the solid mixture at a temperature of at least 550.degree. C.
摘要:
High-yield catalytic production of acrylonitrile at an elevated temperature, from a reaction mixture containing propylene, ammonia and molecular oxygen, utilizing a catalyst comprising an oxide composition having the empirical formula Mo.sub.a Co.sub.b Fe.sub.c X.sub.d O.sub.e wherein X denotes at least one atom of an element selected from among calcium, tungsten, chromium, zirconium, titanium, zinc, manganese, and tin and the atomic ratio a:b:c:d:e is in the range of 12:4 to 10:1 to 6:0 to 1.0:40 to 70, said catalyst being prepared by providing an aqueous mixture containing compounds of the elements, drying the aqueous mixture, and calcining the dried solid product at a temperature of at least 500.degree. C.
摘要:
Propylene or isobutylene is catalytically oxidized into the corresponding nitrile with improved conversions and yields. The catalyst consists essentially of the metals; (A) Mo, (B) Bi, (C) Co, (D) Fe and (E) Zr in the predetermined atomic ratios.
摘要:
Acrolein or methacrolein is produced in a high percent of yield by a catalytic oxidation of propylene or isobutylene in the presence of a catalyst of the empirical formula:Mo.sub.10 Co.sub.0.about.10 Ni.sub.0.about.10 Fe.sub.0.1.about.5 Bi.sub.0.001.about.3 Al.sub.0.05.about.10 Ti.sub.1.about.15 A.sub.0.about.4 O.sub.33.2.about.99wherein A denotes at least one alkali metal atom and the sum of the numbers of cobalt atoms and the nickel atoms is 1 to 10 per 10 atoms of molybdenum, which catalyst has an excellent crushing strength and exhibits a high catalyst activity.
摘要:
A catalyst for the ammoxidation of propylene to prepare acrylonitrile with a high yield thereof comprising an oxide composition of the empirical formula (I)Mo.sub.a Co.sub.b Ni.sub.c Fe.sub.d Bi.sub.e V.sub.f Ca.sub.g K.sub.h X.sub.i Si.sub.j O.sub.k (I)wherein X is zirconium and/or chromium, the subscripts a, b, c, d, e, f, g, h, i and j respectively denote the number of the respective atoms of the elements, when a=10, b=0 to 8, c=0 to 8, (b+c)=2 to 10, d=0.3 to 7, e=0.01 to 3, f=0.01 to 2, g=0.01 to 5, h=0.05 to 0.5, i=0 to 2, j=10 to 50, and the subscript k denotes the number of oxygen atoms which satisfies the average valency of the elements other than oxygen and the ratio a:k being in a range of 10:30 to 80, which catalyst is prepared by preparing an aqueous slurry containing respective element-containing compounds, by spray drying the aqueous slurry to prepare a dried solid precursory catalyst and, finally, by calcining the precursory catalyst as a temperature of from 500.degree. to 750.degree. C. to provide an activated catalyst.
摘要:
Unsaturated hydrocarbons having 4 to 6 carbon atoms are catalytically oxidized into maleic anhydride by using a catalyst, which consists essentially of oxides of (A) vanadium, (B) phosphorus, (C) titanium and (D) optionally at least one element selected from sodium, calcium, magnesium, iron, zirconium, boron, manganese, silver and molybdenum in the atomic ratios defined by the following formulaVP.sub.a Ti.sub.b X.sub.c O.sub.dwherein X is the element (D) set forth above and a=1.0 to 5.0, b=2.0 to 12.0 and c=0 to 1.0, and which catalyst is prepared by calcining a mixture of a vanadium-containing compound and titanium dioxide at a temperature of 650.degree. C. to 1,500.degree. C., incorporating into the mixture a phosphorus-containing compound and optionally the element "X"-containing compound and, then, heating the resulting mixture.
摘要:
Unsaturated hydrocarbons having 4 to 6 carbon atoms are catalytically oxidized into maleic anhydride at relatively low temperatures in the range of 300.degree. C to 450.degree. C. The catalyst used consists essentially of oxides of vanadium, phosphorus, zirconium, and at least one element selected from manganese, boron, cadmium, silver, bismuth and zinc.
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.