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| Electrodeionization apparatus |
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| Method of and apparatus for chromatographic analysis |
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| Depletion compartment and spacer construction for electrodeionization apparatus |
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| Apparatus for determination of microconstituents |
| OF PREFERRED EMBODIMENTS Turning to FIG. 2, tanks 11a and 11b are used, respectively, for storing ... |
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| Modified membrane suppressor and method for use |
| OF THE PREFERRED EMBODIMENTS The system of the present invention is useful for determining a large ... |
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| Aqueous carbon dioxide monitor |
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Converting low molecular weight olefins over zeolites
| Details |
Inventors: Givens, Edwin N.; Plank, Charles J.; Rosinski, Edward J.;
Assignee: Mobil Oil Corporation (New York, NY)
Primary Examiner: Coughlan, Jr.; Paul M.
Assistant Examiner:
Attorney, Agent or Firm: Huggett; Charles A., Barclay; Raymond W., Setliff; Claude E.
Gaseous C.sub.2 -C.sub.5 olefins, either alone or in admixture with paraffins, are converted into an olefinic gasoline blending stock with a good research octane number in good yields by passage over a ZSM-5 type zeolite catalyst of controlled acidity. The catalyst must have reduced activity for cracking of n-hexane or aromatization of olefins or paraffins if it is to be useful for the purpose of this invention. |
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DETAILED DESCRIPTION We claim: 1.
A process for producing a gasoline fraction having therein no more than about 20% by weight of aromatics, said process comprising contacting a C.
sub.
2 -C.
sub.
5 olefin, mixtures thereof or mixtures thereof with paraffins having from 1 to 5 carbon atoms with a crystalline aluminosilicate zeolite selected from the group consisting of ZSM-5 and ZSM-11 and having an .
alpha.
-value of from about 0.
1 to about 120, at a WHSV of from about 0.
1 to about 25 and at a temperature of from about 500.
degree.
F to about 900.
degree.
F, whereby said gasoline fraction containing predominantly higher olefins is obtained.
2.
The process of claim 1 wherein the zeolite is ZSM-5.
3.
The process of claim 1 wherein the .
alpha.
-value is from about 0.
1 to about 100.
4.
The process of claim 1 wherein a proportion of the original cations associated with the zeolite are replaced by another cation.
5.
The process of claim 4 wherein the replacing cation is a metal cation.
6.
The process of claim 5 wherein the metal cation is nickel.
7.
The process of claim 1 wherein the catalyst used is in the H-form.
8.
The process of claim 5 wherein the replacing cation is zinc.
9.
The process of claim 5 wherein the replacing cation is chromium.
10.
The process of claim 1 wherein the low aromatization activity is a result of steam treating the zeolite.
11.
The process of claim 1 wherein the zeolite is incorporated in a matrix.
12.
The process of claim 1 wherein the gasoline fraction has a research octane number of 90 or above.
Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention This invention relates to a method of catalytically converting olefins into gasoline fractions, particularly by passing olefins over a ZSM-5 type zeolite having reduced aromatization activity.
2.
Brief Description of the Prior Art It has long been known to contact various hydrocarbon fractions with acidic catalysts generally and, in particular, with solid siliceous acidic catalysts -- including those referred to as crystalline aluminosilicate zeolites
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