C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/568.6, 260/5
C07C 45/33 (2006.01) B01J 23/88 (2006.01) B01J 23/887 (2006.01) B01J 27/192 (2006.01) C07C 45/32 (2006.01) C07C 45/35 (2006.01) C07C 45/37 (2006.01) C07C 47/22 (2006.01) C07C 51/21 (2006.01) C07C 51/23 (2006.01) C07C 51/235 (2006.01) C07C 51/25 (2006.01) C07C 57/045 (2006.01)
Patent
CA 2039563
In a process for producing an unsaturated aldehyde or an unsaturated acid by catalytically oxidizing propylene or at least one compound selected from isobutylene, tert.-butyl alcohol and methyl-tert.- butyl ether in a gaseous phase with molecular oxygen or a molecular oxygen-containing gas using a fixed bed multipipe reactor, characterized in that (a) a plurality of composite oxides different in occupied volume, represented by formula MoaWbBicFedAeBfCgDhOx ... (I) wherein Mo denotes molybdenum; W denotes tungsten; Bi denotes bismuth; Fe denotes iron; A denotes at least one element selected from cobalt and nickel; B denotes at least one element selected from an alkali metal, an alkaline earth metal and thallium; C denotes at least one element selected from phosphorus, tellurium, arsenic, boron, niobium, antimony, tin, lead, manganese, cerium and zinc; D denotes at least one element selected from silicon, alminum, titanium and zirconium; O denotes oxygen; a, b, c, d, e, f, g, h and x denote numbers of atoms of Mo, W, Bi, Fe, A, B, C, D and O; when a=2 to 12, b=0 to 10 and a+b=12, c=0.1 to 10, d=0.1 to 10, e=2 to 20, f=0.005 to 3, g=0 to 4, h=0.5 to 30 and x=value determined by an oxidized state of each element, are used as catalysts, (b) a plurality of reaction zones are provided along an axial direction in each reaction pipe of the fixed bed multipipe reactor, and (c) the plurality of the catalysts different in occupied volume are filled in the plurality of the reaction zones such that the occupied volumes become lower from the starting gas inlet side to the outlet side.
Aoki Yukio
Hironaka Hideyuki
Kawajiri Tatsuya
Uchida Shinichi
Nippon Shokubai Kagaku Kogyo Co. Ltd.
Smart & Biggar
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