Claims
- 1. A process for producing acrolein which comprises catalytic oxidizing propylene with a gas containing oxygen and steam in the vapor phase, at a temperature of 250 to 450.degree.C, employing a calcined catalyst having the general composition of Mo.sub.a Co.sub.b Fe.sub.c Bi.sub.d A.sub.e O.sub.f, wherein a, b, c, d, e, and f in the above formula are respectively the atomic amounts of each element, and when a is equal to 12, the values of b, c, d, e, and f have the respective ranges, b=7-12, c=0.3-4, d=0.4-2.5, e=0.1-3, f=47-73, and A is composed of tin alone or a composite system of tin and one or more elements selected from a group consisting of aluminum, nickel, tungsten, chromium, indium and niobium, the minimum content of tin in A being in the atomic amount of 0.1.
- 2. The process of claim 1 in which the catalyst is used as a fixed bed, and the feed gas contains 1 to 15 mol percent of propylene, 20 to 90 mol percent of air, and 5 to 50 mol percent of steam.
- 3. The process of claim 2 in which said temperature is 280.degree. to 370.degree. C.
- 4. The process of claim 1 in which A is composed of tin and aluminum.
- 5. The process of claim 1 in which A is composed of tin and nickel.
- 6. The process of claim 1 in which A is composed of tin and tungsten.
- 7. The process of claim 1 in which A is composed of tin and chromium.
- 8. The process of claim 1 in which A is composed of tin and indium.
- 9. The process of claim 1 in which A is composed of tin and niobium.
- 10. The process of claim 1 in which A is composed of tin.
Parent Case Info
This is a division of application Ser. No. 215,906, filed Jan. 6, 1972, now U.S. Pat. No. 3,786,000.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3236782 |
Koch |
Feb 1966 |
|
3522299 |
Takenaka et al. |
Jul 1970 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
873,712 |
Jul 1961 |
UK |
Divisions (1)
|
Number |
Date |
Country |
Parent |
215906 |
Jan 1972 |
|