摘要:
Alkanes are oxidized in the liquid phase at relatively low temperature using heteropolyacids or polyoxoanions promoted with azide or certain metals. Such azide catalysts are also part of the invention.
摘要:
Catalysts represented by general formula PaMobVcFedCueZfXgYhOi (wherein X represents at least one element selected from the group consisting of potassium, rubidium, cesium, and thallium, Y represents at least one element selected from the group consisting of tellurium, lanthanum, boron, silver, chromium, magnesium, and barium, Z represents either zirconium or antimony, a to i each represents an atomic ratio of each element wherein a = 0.3 - 4, c = 0.01 - 3, d = 0.01 - 4, e = 0.01 - 3, f = 0.01 - 3, g = 0.01 - 3 and h = 0.001 - 5, when b = 12, and i represents the number of oxygen atoms necessary for satisfying the valences of respective atoms) and a process for producing methacrylic acid by contacting methacrolein with the catalyst in a gas phase.
摘要:
A method for making a catalyst composition that includes a reduction catalyst mixture including a first reduction catalyst and a second reduction catalyst, wherein said first reduction catalyst comprises mixed vanadium oxides and phosphorus oxides, wherein said mixed vanadium and antimony oxides comprises V 4 Sb 6 O 8 , and wherein said second reduction catalyst comprises vanadium and antimony oxides; and an oxidation catalyst comprising ferrocene. The method includes selecting an organic petroleum distillate-soluble solvent that is effective to act as a reducing agent; introducing finely ground V 2 O 5 and aqueous H 3 PO 4 into said selected organic petroleum distillate-soluble solvent to make a first mixture; adding finely ground V/Sb oxide catalyst to said first mixture to make a second mixture; bringing the second mixture to a boil; cooling the second mixture; and adding the ferrocene or other organometallic Fe-source material to the cooled second mixture to make the catalyst composition.