A catalyst for production of methacrylic acid, said catalyst being molded in a ring-like shape having an outside diameter of 3.0 to 10.0 mm, an inside diameter 0.1 to 0.7 times the outside diameter and a length 0.5 to 2.0 times the outside diameter, said catalyst comprising a catalytically active ma
A catalyst for production of methacrylic acid, said catalyst being molded in a ring-like shape having an outside diameter of 3.0 to 10.0 mm, an inside diameter 0.1 to 0.7 times the outside diameter and a length 0.5 to 2.0 times the outside diameter, said catalyst comprising a catalytically active material having the composition represented by the following general formula ##EQU##Mo a P b A c B d C e D f O x wherein Mo is molybdenum, P is phosphorus, A is at least one element selected from the group consisting of arsenic, antimony, germanium, bismuth, zirconium and selenium, B is at least one element selected from the group consisting of copper, iron, chromium, nickel, manganese, cobalt, tin, silver, zinc and rhodium, C is at least one element selected from the group consisting of vanadium, tungsten and niobium, D is at least one element selected from the group consisting of alkali metals, alkaline earth metals and thallium, and O is oxygen, and a, b, c, d, e, f and x represents the atomic ratios of Mo, P, A, B, C, D and O provided that when a is 12, b is 0.5 to 4, c is 0 to 5, d is 0 to 3, e is 0 to 4 and f is 0.01 to 4 and x is a number determined by the oxidation states of the individual elements.
대표청구항▼
1. A catalyst for production of methacrylic acid, said catalyst being molded in a ring-like shape having an outside diameter of 3.0 to 10.0 mm, an inside diameter of 0.1 to 0.7 times the outside diameter and a length of 0.5 to 2.0 times the outside diameter, said catalyst consisting essentially of a
1. A catalyst for production of methacrylic acid, said catalyst being molded in a ring-like shape having an outside diameter of 3.0 to 10.0 mm, an inside diameter of 0.1 to 0.7 times the outside diameter and a length of 0.5 to 2.0 times the outside diameter, said catalyst consisting essentially of a catalytically active material having the composition represented by the following general formula ##EQU##Mo a P b A c B d C e D f O x wherein Mo is molybdenum, P is phosphorus, A is at least one element selected from the group consisting of arsenic, antimony, germanium, bismuth, zirconium and selenium, B is at least one element selected from the group consisting of copper, iron, chromium, nickel, manganese, cobalt, tin, silver, zinc and rhodium, C is at least one element selected from the group consisting of vanadium, tungsten and niobium, D is at least one element selected from the group consisting of alkali metals, alkaline earth metals and thallium, and O is oxygen, and a, b, c, d, e, f and x represent the atomic ratios of Mo, P, A, B, C, D and O provided that when a is 12, b is 0.5 to 4, c is 0 to 5, d is 0 to 3, e is 0 to 4 and f is 0.01 to 4 and x is a number determined by the oxidation states of the individual elements. 2. The catalyst of claim 1 which has an outside diameter of 4.0 to 8.0 mm, an inside diameter of 0.2 to 0.6 times the outside diameter and a length 0.7 to 1.3 times the outside diameter. 3. The catalyst of claim 1 wherein the catalytically active material is selected from the group consisting of Mo 12 P 1 .09 V 1 .09 Cs 1 .0, Mo 12 P 2 Cu 0 .3 K 1 V 1 As 0 .5, Mo 12 P 2 Bi 0 .5 Sb 0 .5 Cs 2 .0 Cr 0 .5 Se 0 .5, Mo 10 P 1 V 1 K 0 .1 Cu 0 .2 Fe 0 .2 Sn 0 .1, Mo 12 P 1 .09 V 1 .09 Ba 0 .5, Mo 12 P 1 .09 W 1 .09 Rb 1 .0 Zr 0 .2 Co 0 .5, Mo 10 P 1 Nb 1 Sr 0 .5 Mn 0 .5 Zn 0 .5, Mo 12 P 1 .09 V 1 .09 Ca 0 .5 Ge 0 .2 Ni 0 .2, Mo 12 P 1 .09 V 1 .09 Mg 0 .5 Rh 0 .1 Ag 0 .5, Mo 12 P 1 .09 V 1 .09 Cs 1 .0 Cu 0 .2, Mo 12 P 1 .5 V 0 .6 Cu 0 .2 K 1 .0 As 0 .6, and Mo 12 P 1 .5 V 0 .6 Cu 0 .2 Cs 1 .0 As 0 .6.
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이 특허에 인용된 특허 (14)
Kirch Lawrence S. (Huntingdon Valley PA) Kennelly William J. (Newtown PA), Catalyst compositions and their use for the preparation of methacrolein.
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Kennelly William J. (Newton PA) Kirch Lawrence S. (Huntington Valley PA), Catalyst compositions and their use for the preparation of unsaturated carboxylic acids.
Stevenson, Scott A.; Liang, Wugeng; Kauffman, James W.; Cai, Lixia; McGuffey, Angie; Linzer, Joseph R., Catalyst for methacrolein oxidation and method for making and using same.
Liang, Wugeng; Stevenson, Scott A.; McGuffey, Angie; Linzer, Joseph R., Catalyst for the oxidation of a mixed aldehyde feedstock to methacrylic acid and methods for making and using same.
Kauffman, James W.; Sullivan, David L.; Dostal, Joe D., High molybdenum mixed metal oxide catalysts for the production of unsaturated aldehydes from olefins.
Miyatake, Toshiaki; Shibata, Junji; Shiraishi, Eiichi, Method for producing catalyst for preparation of methacrylic acid and method for preparing methacrylic acid.
Bremer Noel L. (Kent OH) Brazdil Linda C. (Highland Hts. OH) Brazdil James F. (Highland Hts. OH) Cavalcanti Fernando A. P. (South Euclid OH), Method of improving catalyst activity, improved catalysts and their use.
Kondo,Masahide; Kawato,Seiichi; Kuroda,Toru, Method of producing catalyst for synthesis of unsaturated aldehyde and unsaturated carboxylic acid and catalyst prepared by this method.
Stevenson, Scott A.; Liang, Wugeng; Kauffman, James W.; Cai, Lixia; McGuffey, Angie; Linzer, Joseph R., Methods for making unsaturated acids using catalysts for methacrolein oxidation.
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