Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2008-09-30
2008-09-30
Eyler, Yvonne (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S532000, C562S534000
Reexamination Certificate
active
10764852
ABSTRACT:
There are disclosed a catalyst and a process for production of acrylic acid using this catalyst, wherein, even under conditions where hot spots are formed, the catalyst is excellent in activity, selectivity, and catalyst life time and displays stable performances for a long time. The catalyst is shown by the following formula (1):in-line-formulae description="In-line Formulae" end="lead"?MoaVbWcCudAeBfCgOx (1)in-line-formulae description="In-line Formulae" end="tail"?(wherein: A is at least one species selected from among cobalt, nickel, iron, lead, and bismuth; B is at least one species selected from among antimony, niobium, and tin; and C is at least one species selected from among silicon, aluminum, titanium, and zirconium; and further, a, b, c, d, e, f, g, and x are atomic ratios of Mo, V, W, Cu, A, B, C, and O respectively; and, in the case of a=12, the following inequalities are satisfied: 2≦b≦15; 0<c≦10; 0<d≦6; 0<e≦30; 0≦f≦6; and 0≦g≦60; and x is a numerical value as determined by the oxidation state of each element); wherein a supply source of a component A for preparing the catalyst is a composite of the component A and at least one species selected from among Mo, V, and Cu.
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Hirao Harunori
Tanimoto Michio
Cho Jennifer Y
Eyler Yvonne
Nippon Shokubai Co. , Ltd.
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