IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0558939
(1975-03-17)
|
| 우선권정보 |
JA-0074014 (1973-06-30); JA-0138691 (1973-12-14); JA-0019933 (1974-02-21) |
|
발명자
/ 주소 |
- Ishimi Kazuo (Takasaki JA)
|
| 출원인 / 주소 |
- Nippon Kayaku Kabushiki Kaisha (Tokyo JA 03)
|
| 인용정보 |
피인용 횟수 :
18 인용 특허 :
0 |
초록
▼
The invention relates to the vapor phase oxidation of methacrolein to methacrylic acid with molecular oxygen or a molecular oxygen-containing gas and a catalyst having the following composition: MoaPbSbcZndXeOf(NH4)g wherein X is at least one of Cr, W, Fe, Co, Ni, Cu, Sn, Mn, V and Bi. The subscript
The invention relates to the vapor phase oxidation of methacrolein to methacrylic acid with molecular oxygen or a molecular oxygen-containing gas and a catalyst having the following composition: MoaPbSbcZndXeOf(NH4)g wherein X is at least one of Cr, W, Fe, Co, Ni, Cu, Sn, Mn, V and Bi. The subscripts a, b, c, d, e, f and g are as defined below.
대표청구항
▼
A method for the manufacture of methacrylic acid comprising: providing a catalyst having the following composition: MoaPbSbcZndXeOf(NH4)g wherein, X denotes at least one element selected from the group consisting of chromium, tungsten, iron, cobalt, nickel, copper, tin, manganese, vanadium and bismu
A method for the manufacture of methacrylic acid comprising: providing a catalyst having the following composition: MoaPbSbcZndXeOf(NH4)g wherein, X denotes at least one element selected from the group consisting of chromium, tungsten, iron, cobalt, nickel, copper, tin, manganese, vanadium and bismuth, the subscripts a, b, c, d, e, and f respectively denote the numbers of molybdenum, phosphorus, antimony, zinc, X and oxygen atoms, the subscript g denotes the number of ammonium groups, with the proviso that the elements are present in a ratio so that a is 12, b is 0.8 to 6, c is 0.1 to 7, d is less than 4 but not 0, e is 0 to 6 and g is 0 to 3.5 and f is 38 to 81; and contacting said catalyst with a gaseous feed comprising methacrolein and molecular oxygen or a molecular oxygen-containing gas to effect oxidation of the methacrolein in the vapor phase.
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