摘要:
A method for producing an unsaturated nitrile by a propane ammoxidation reaction, the method including: a step of measuring at least one physical property value selected from the group consisting of the normalized UV value and the reduction ratio of a catalyst contained in a reactor, and a step of maintaining or changing a reaction condition based on the measured physical property value.
摘要:
An oxide catalyst composition for use in producing methacrolein or a mixture of methacrolein and methacrylic acid, wherein the oxide catalyst composition is represented by the formula (Mo + W)12 Bia Ab Bc Fed Xe Sbf Og , wherein: A is at least one member selected from the group consisting of Y and the elements of the lanthanoid series exclusive of Pm; B is at least one member selected from the group consisting of K, Rb and Cs; X is Co solely, or a mixture of Co and at least one member selected from the group consisting of Mg and Ni; and a, b, c, d, e, f and g are, respectively, the atomic ratios of Bi, A, B, Fe, X, Sb and O, relative to twelve atoms of the total of Mo and W, wherein the atomic ratios (a to f) of the elements and the relationship between the amounts of the elements are chosen so as to satisfy specific requirements.
摘要:
A method for producing an unsaturated nitrile by a propane ammoxidation reaction, the method including: a step of measuring at least one physical property value selected from the group consisting of the normalized UV value and the reduction ratio of a catalyst contained in a reactor, and a step of maintaining or changing a reaction condition based on the measured physical property value.
摘要:
The present invention provides a composite oxide catalyst comprising a catalyst particle including Mo, V, a component X and a carrier containing silica, wherein the component X is at least one element selected from alkaline earth metal elements and rare earth elements, wherein the composite oxide catalyst is carried by the carrier, and wherein the component X is uniformly distributed in the catalyst particle.
摘要:
A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst system contains at least one solid acid component and at least one metal-based component which consists of (a) oxygen and/or sulfur and (b) a metal combination selected from the group consisting of: i) at least one metal from Group 3 and at least one metal from Groups 4-15 of the Periodic Table of the Elements; ii) at least one metal from Groups 5-15 of the Periodic Table of the Elements, and at least one metal from at least one of Groups 1, 2, and 4 of the Periodic Table of the Elements; iii) at least one metal from Groups 1 and 2, at least one metal from Group 3, and at least one metal from Groups 4-15 of the Periodic Table of the Elements; and iv) two or more metals from Groups 4-15 of the Periodic Table of the Elements, wherein the at least one of oxygen and sulfur is chemically bound both within and between the metals and, optionally, (3) at least one of at least one support, at least one filler and at least one binder. The process is such that the yield of hydrogen is less than the yield of hydrogen when contacting the hydrocarbons with the solid acid component alone. Further, the emissions of NOx from the regeneration cycle of the catalyst system are reduced.
摘要:
It is an object of the present invention to provide a mixed catalyst for a vapor-phase catalytic oxidation or a vapor-phase catalytic ammoxidation reaction of propane or isobutane, capable of providing a corresponding unsaturated acid or unsaturated nitrile at high yield from propane or isobutane. A mixed catalyst for a vapor-phase catalytic oxidation reaction or a vapor-phase catalytic ammoxidation reaction of propane or isobutane comprises: (a) a composite oxide represented by the following composition formula (1): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒMo 1 V a Nb b Sb c W d Z e O n €ƒ€ƒ€ƒ€ƒ€ƒ(1) wherein Z represents at least one element selected from the group consisting of La, Ce, Pr, Yb, Y, Sc, Sr, and Ba; each of a, b, c, d, e, and n represents an atomic ratio of each element based on Mo atom; a is in a range of 0.01 ‰¤ a ‰¤ 1; b is in a range of 0.01 ‰¤ b ‰¤ 1; c is in a range of 0.01 ‰¤ c ‰¤ 1; d is in a range of 0.001 ‰¤ d ‰¤ 1; e is in a range of 0 ‰¤ e ‰¤ 1; and n represents a number determined by the valence of a component metal; and (b) a tungsten compound at a ratio of the following formula (2): 0.001