Claims
- 1. A process for the production of aromatic hydrocarbons from synthesis gas which process comprises contacting synthesis gas at elevated temperature and either atmospheric or elevated pressure with
- a catalyst composition which comprises the essential metals:
- (a) ruthenium and at least one of iron, cobalt and nickel, and
- (b) at least one of lithium, sodium, potassium, calcium and magnesium
- supported on silicalite the metals [(a)+(b)] being present on the silicalite support in an amount in the range from 0.5 to 15% by weight, modified by combination with the hydrogen form of a crystalline zeolite having the composition expressed as mole ratios of oxides:
- 0. 9.+-.0.2M.sub.2/n O:W.sub.2 O.sub.3 :20 to 50 YO.sub.2 :zH.sub.2 O (I)
- wherein M is at least one cation, n is the valence thereof, W is aluminium, or gallium, Y is silicon and/or germanium and z has a value of 0 to 40, said zeolite being characterised by an XRD pattern which is substantially that of an MFI-type zeolite.
- 2. A process according to claim 1 wherein in the formula (I) W is aluminium and Y is silicon.
- 3. A process according to claim 1 wherein the ratio of the silicalite supported portion of the catalyst composition to the hydrogen form of the crystalline zeolite portion is in the range from 10:1 to 1:10.
- 4. A process according to claim 1 wherein the essential metals are ruthenium, iron and potassium.
- 5. A process according to claim 1 wherein the crystalline zeolite is ZSM-5.
- 6. A process according to claim 1 wherein the catalyst combination is obtained by mixing that portion of the catalyst comprising the metals (a) and (b) supported on silicalite with the ammonium ion-exchanged form of the crystalline zeolite and, after mixing, decomposing the ammonium ion-exchanged form of the crystalline zeolite to produce the hydrogen form.
- 7. A process according to claim 10 wherein the elevated temperature is in the range from 200.degree. to 550.degree. C.
- 8. A process according to claim 1 wherein the pressure is in the range from 0 to 100 bars.
Priority Claims (1)
Number |
Date |
Country |
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8220421 |
Jul 1982 |
GBX |
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Parent Case Info
This is a division of application Ser. No. 512,740, filed July 11, 1983, U.S. Pat. No. 4,542,117.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2006819 |
May 1979 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Rao et al., Hydrocarbon Processing, Nov. 1980, pp. 139-142. |
Rao et al., Preprints, Div. of Fuel Chemistry, Amer. Chem. Soc., vol. 25, No. 2, 1980, pp. 119-125. |
Divisions (1)
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Number |
Date |
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Parent |
512740 |
Jul 1983 |
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