Mobil Oil Corporation

Philip D Caesar

William E Garwood

James A Brennan

John J Wise

Julius Ciric

Roger A Morrison

Robert E Holland

Alan W Peters

Roger Allen Morrison

William F Krudewig

A gaseous mixture of carbon monoxide and hydrogen is passed in contact over a first catalyst bed comprising an iron or cobalt containing Fischer-Tropsch catalyst in combination with a crystalline aluminosilicate of the class of crystalline zeolite represented by ZSM-5 so as to obtain a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead and being a predominantly olefinic product. The total products from said contact including said liquid hydrocarbon product are then converted over a second catalyst bed containing HZSM-5 to obtain a highly aromatic product, i.e., greater than 20 weight percent.

Conversion of synthesis gas to hydrocarbon mixtures utilizing a dual

A method is disclosed for the conversion of a syngas to a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead and being a predominantly olefinic product, wherein the olefins have substantially internal double bonds. The method for accomplishing this stated result involves an improvement in the method for the conversion of synthesis gas by contacting the same with a catalyst composite comprising a mixture of a Fischer-Tropsch catalyst and a volume excess of an acidic catalyst, e.g., silica-alumina or a crystalline aluminosilicate zeolite and wherein the activity of the acidic component is balanced with the activity of the Fischer-Tropsch component so as to maximize the yield of desired olefinic product.

Conversion of syngas to high octane olefinic naphtha

An improved processing technique is provided for gas oil pour point reduction and dewaxing. The improved technique comprises contacting an appropriate gas oil feedstock with a catalyst comprising a crystalline aluminosilicate zeolite characterized by a silica/alumina mole ratio of at least 12 and a constraint index, hereinafter defined, within the approximate range of 1 to 12 in the presence of a relatively large amount of co-fed water. The amount of co-fed water is maintained at from about 0.5 to about 15 moles of water/mole of gas oil feedstock.

Gas oil processing

An improved processing technique is provided for conversion of olefins of 2 to 4 carbon atoms to product comprising high octane gasoline components. Embodiments of the present improved processing technique include conversion of light olefins to high octane olefinic gasoline components, and conversion of light olefins to high octane aromatic gasoline components. The improved technique comprises contacting an appropriate light olefin feedstock with a catalyst comprising a crystalline aluminosilicate zeolite characterized by a silica/alumina mole ratio of at least 12 and a constraint index, hereinafter defined, within the approximate range of 1 to 12 in the presence of a relatively large amount of co-fed water. The amount of co-fed water is maintained at from about 0.5 to about 15 moles of water/mole of olefin feedstock.

Light olefin processing

The product of Fischer-Tropsch synthesis is separated to recover a C.sub.5 -400.degree. F liquid fraction which is thereafter upgraded to a higher octane gasoline fraction and a low-pour, high diesel index fuel oil by a 'dense phase' process using HZSM-5 and related zeolites as catalysts.

Method of upgrading a Fischer-Tropsch light oil

Fischer-Tropsch synthol naptha is upgraded to high octane gasoline with minimum yield loss in a multistep process comprising fractionating the synthol naptha to give a C.sub.5 + C.sub.6 fraction and C.sub.7.sup.+ fraction, processing the C.sub.5 + C.sub.6 fraction over a ZSM-5 catalyst under dense phase conditions, pretreating and reforming the C.sub.7.sup.+ fraction under conventional conditions, and blending the C.sub.5.sup.+ products from both the C.sub.5 + C.sub.6 and C.sub.7.sup.+ processing steps.

Combination process for upgrading synthol naphtha fractions

Ethylene is produced by catalytic conversion of a methanol feed in the presence of substantially anhydrous diluent. The catalyst employed is exemplied by HZSM-5, a crystalline aluminosilicate zeolite, and the conversion is conducted at relatively low temperature, e.g. less than about 650.degree. F. The hydrocarbon conversion product contains at least 18 wt.% ethylene.

Process for manufacturing ethylene

Ethylene is produced by catalytic conversion of a methanol feed in the presence of steam or water diluent. The catalyst employed is exemplified by HZSM-5, a crystalline aluminosilicate zeolite, and the conversion is conducted at relatively low temperature, i.e. from about 600.degree. F to about 750.degree. F. The hydrocarbon conversion product contains at least 18 wt.% ethylene.

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Princeton, NJ, United States of America

Philip D Caesar