CATALYST FOR SYNTHESIZING ACRYLONITRILE AND PROCESS FOR PRODUCING ACRYLONITRILE

• US 20090234149A1
• Filed: 03/05/2009
• Published: 09/17/2009
• Est. Priority Date: 03/14/2008
• Status: Active Grant

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Dia-Nitrix Co., Ltd. (Mitsubishi Chemical Group Corp.)
• Inventors: Karasuda, Takashi, Watanabe, Hirokazu, Miyaki, Kenichi, Yanagita, Motoo
• Granted Patent: US 8,034,736 B2
• Time in Patent Office: Days
• US Class Current: 558/322
• CPC Class Codes: B01J 21/08 Silica
• CPC Class Codes: B01J 23/002 Mixed oxides other than spinels, e.g. perovskite
• CPC Class Codes: B01J 23/8877 Vanadium, tantalum, niobium or polonium
• CPC Class Codes: B01J 23/8878 Chromium
• CPC Class Codes: B01J 23/8885 containing also molybdenum
• CPC Class Codes: B01J 23/8898 containing also molybdenum
• CPC Class Codes: B01J 2523/00 Constitutive chemical elements of heterogeneous catalysts
• CPC Class Codes: B01J 2523/11 Lithium
• CPC Class Codes: B01J 2523/13 Potassium
• CPC Class Codes: B01J 2523/14 Rubidium
• CPC Class Codes: B01J 2523/17 Copper
• CPC Class Codes: B01J 2523/22 Magnesium
• CPC Class Codes: B01J 2523/27 Zinc
• CPC Class Codes: B01J 2523/305 Boron
• CPC Class Codes: B01J 2523/31 Aluminium
• CPC Class Codes: B01J 2523/3706 Lanthanum
• CPC Class Codes: B01J 2523/41 Silicon
• CPC Class Codes: B01J 2523/48 Zirconium
• CPC Class Codes: B01J 2523/51 Phosphorus
• CPC Class Codes: B01J 2523/53 Antimony
• CPC Class Codes: B01J 2523/54 : Bismuth
• CPC Class Codes: B01J 2523/55 : Vanadium
• CPC Class Codes: B01J 2523/64 : Tellurium
• CPC Class Codes: B01J 2523/67 : Chromium
• CPC Class Codes: B01J 2523/68 : Molybdenum
• CPC Class Codes: B01J 2523/69 : Tungsten
• CPC Class Codes: B01J 2523/72 : Manganese
• CPC Class Codes: B01J 2523/842 : Iron
• CPC Class Codes: B01J 2523/845 : Cobalt
• CPC Class Codes: B01J 2523/847 : Nickel
• CPC Class Codes: B01J 27/0576 : Tellurium; Compounds thereof
• CPC Class Codes: B01J 27/187 : with manganese, technetium or rhenium
• CPC Class Codes: B01J 27/188 : with chromium, molybdenum, tungsten or polonium
• CPC Class Codes: B01J 27/19 : Molybdenum
• CPC Class Codes: B01J 37/0045 : Drying a slurry, e.g. spray drying
• CPC Class Codes: C07C 253/26 : containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
• CPC Class Codes: C07C 255/08 : Acrylonitrile; Methacrylonitrile
• CPC Class Codes: Y02P 20/52 : using catalysts, e.g. selective catalysts

Abstract

A catalyst for synthesizing acrylonitrile that enables acrylonitrile to be synthesized at high yield, and a process for producing acrylonitrile using that catalyst, are provided. A catalyst for synthesizing acrylonitrile is used having a composition represented by Fe_aSb_bC_cD_dTe_eF_fX_xY_yZ_zO_g(SiO₂)_h. In the formula, component C represents at least one element selected from the group consisting of Cu, Ni and Co, component D from the group consisting of Mo, W and V, component F from the group consisting of P and B, component X from the group consisting of Sn, Ti, Zr, Nb, Ta, Cr, Ru, Pd, Ag, Al, Ga, In, Tl, Ge, As, Bi, La, Ce, Pr, Nd and Sm, component Y from the group consisting of Mg, Ca, Sr, Ba, Mn, Zn and Pb, and component Z from the group consisting of Li, Na, K, Rb and Cs, and SiO₂ represents silica, when a=10, b=5 to 60, c=0.1 to 8.0, d=0.1 to 4.0, e=0.1 to 5.0, f=1.3 to 5.0, x=0 to 5, y=0 to 5, z=0 to 2, h=10 to 200 and g is the atomic ratio of oxygen required to satisfy the valence of each of the elements excluding silicon, and f/d=1 to 5.

Claims

1. A catalyst for synthesizing acrylonitrile having the composition represented by the following general formula:

Fe_aSb_bC_cD_dTe_eF_fX_xY_yZ_zO_g(SiO₂)_h

(wherein, Fe represents iron, Sb represents antimony, Te represents tellurium, component C represents at least one element selected from the group consisting of copper, nickel and cobalt, component D represents at least one element selected from the group consisting of molybdenum, tungsten and vanadium, component F represents at least one element selected from the group consisting of phosphorous and boron, component X represents at least one element selected from the group consisting of tin, titanium, zirconium, niobium, tantalum, chromium, ruthenium, palladium, silver, aluminum, gallium, indium, thallium, germanium, arsenic, bismuth, lanthanum, cerium, praseodymium, neodymium and samarium, component Y represents at least one element selected from the group consisting of magnesium, calcium, strontium, barium, manganese, zinc and lead, component Z represents at least one element selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, O represents oxygen, SiO₂ represents silica, a, b, c, d, e, f, x, y, z, g and h represent the atomic ratio of each element (silicon in the case of silica), when a=10, b=5 to 60, c=0.1 to 8.0, d=0.1 to 4.0, e=0.1 to 5.0, f=1.3 to 5.0, x=0 to 5, y=0 to 5, z=0 to 2, h=10 to 200 and g is the atomic ratio of oxygen required to satisfy the valence of each of the elements excluding silicon, and f/d=1 to

     5).

2. The catalyst for synthesizing acrylonitrile according to claim 1, wherein iron antimonate is contained as a crystal phase.

3. A process for producing acrylonitrile, comprising:

producing acrylonitrile by reacting propylene, molecular oxygen and ammonia in the presence of the catalyst for synthesizing acrylonitrile according to claim 1 or 2.