Process for the production of methacrolein and methacrylic acid
First Claim
1. A process for the production of methacrolein and methacrylic acid comprising the gas phase catalytic oxidation of isobutylene or t-butanol using molecular oxygen in the presence of a catalyst having the composition
wherein Mo, W, Bi, Fe, Ni, Sb, and O are respectively molybdenum, tungsten, bismuth, iron, nickel, antimony, and oxygen;
X is at least one element selected from the group consisting of potassium, rubidium, and cesium;
Y is at least one element selected from the group consisting of phosphorus, boron, sulfur, silicon, selenium, and germanium;
Z is at least one element selected from the group consisting of zinc and lead;
A is at least one element selected from the group consisting of magnesium, cobalt, manganese, and tin; and
a, b, c, d, e, f, g, h, i, j, and k represent the atomic ratios of the respective elements, and a=12, b=0.001-2, c=0.01-3, d=0.01-8, e=0.01-10, f=0.01-5, g=0.01-2, h=0-5, i=0.01-5, j=0-10, and k is the number of oxygen atoms sufficient to satisfy the valences of the above components.
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Abstract
The present invention provides a process for the production of methacrolein and methacrylic acid by the gas phase catalytic oxidation of isobutylene or t-butanol at high temperature using molecular oxygen in the presence of catalyst consisting of molybdenum, tungsten, bismuth, iron, nickel, antimony, and an alkali metal, to which zinc or lead is added, and further phosphorus sulfur, silicon, selenium, germanium or boron, and magnesium, cobalt, manganese or tin are added.
47 Citations
5 Claims
- 1. A process for the production of methacrolein and methacrylic acid comprising the gas phase catalytic oxidation of isobutylene or t-butanol using molecular oxygen in the presence of a catalyst having the composition
- space="preserve" listing-type="equation">Mo.sub.a W.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sb.sub.f X.sub.g Y.sub.h Z.sub.i A.sub.j O.sub.k
wherein Mo, W, Bi, Fe, Ni, Sb, and O are respectively molybdenum, tungsten, bismuth, iron, nickel, antimony, and oxygen;
X is at least one element selected from the group consisting of potassium, rubidium, and cesium;
Y is at least one element selected from the group consisting of phosphorus, boron, sulfur, silicon, selenium, and germanium;
Z is at least one element selected from the group consisting of zinc and lead;
A is at least one element selected from the group consisting of magnesium, cobalt, manganese, and tin; and
a, b, c, d, e, f, g, h, i, j, and k represent the atomic ratios of the respective elements, and a=12, b=0.001-2, c=0.01-3, d=0.01-8, e=0.01-10, f=0.01-5, g=0.01-2, h=0-5, i=0.01-5, j=0-10, and k is the number of oxygen atoms sufficient to satisfy the valences of the above components.- View Dependent Claims (2, 3, 4, 5)
Specification
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- Resources
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Current AssigneeMitsubishi Rayon Company Limited (Mitsubishi Chemical Holdings Corporation)
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Original AssigneeMitsubishi Rayon Company Limited (Mitsubishi Chemical Holdings Corporation)
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InventorsKato, Masaaki, Taniguchi, Yoshiyuki, Kobayashi, Masao, Oh-Kita, Motomu
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Primary Examiner(s)Garner, Vivian
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Application NumberUS06/801,887Time in Patent Office1,218 DaysField of Search562/538, 562/546, 568/471, 568/477, 502/205, 502/212, 502/215, 502/220, 502/242, 502/243, 502/307, 502/308, 502/310US Class Current562/538CPC Class CodesC07C 45/35 in propene or isobuteneC07C 45/37 of >C—O—functional groups t...C07C 47/22 Acryaldehyde; MethacryaldehydeC07C 51/235 of —CHO groups or primary a...C07C 51/252 of propene, butenes, acrole...C07C 57/04 Acrylic acid; Methacrylic acid
