Process and compositions for Mn containing catalyst for carbo-metallic hydrocarbons
First Claim
1. In a process for improving the gasoline selectivity, conversion, olefin hydrogenation and/or coke-make for the conversion of hydrocarbons to lower molecular weight products comprising gasoline by contacting said hydrocarbons with a circulating zeolite-containing cracking catalyst in a riser containing hydrogen, which is thereafter regenerated to remove at least a portion of carbon-on-catalyst, the improvement comprising in combination the steps of:
- a) maintaining a catalyst;
oil weight ratio of at least about 3; and
b) adding to at least a portion of said cracking catalyst at least 2400 ppm of manganese and/or chromium, based on the weight of the catalyst;
whereby gasoline selectivity is increased by at least 1.0 wt. % (measured at 75 weight % conversion) and conversion is increased by at least 2 wt. %;
both as compared to said process without said manganese or chromium.
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Accused Products
Abstract
An improved "magnetic hook"-promoted catalytic process, catalyst and method of manufacture for heavy hydrocarbon conversion, optionally in the presence of nickel and vanadium on the catalyst and in the feed stock to produce lighter molecular weight fractions, including more gasoline, lower olefins and higher isobutane than normally produced. This process is based on the discovery that two "magnetic hook" elements, namely manganese and chromium, previously employed as magnetic enhancement agents to facilitate removal of old catalyst, or to selectively retain expensive catalysts, can also themselves function as selective cracking catalysts, particularly when operating on feeds containing significant amounts of nickel and vanadium, and especially where economics require operating with high nickel- and vanadium-contaminated and containing catalysts. Under such conditions, these promoted catalysts are more hydrogen and coke selective, have greater activity, and maintain that activity and superior selectivity in the presence of large amounts of contaminant metal, while also making more gasoline at a given conversion.
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Citations
41 Claims
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1. In a process for improving the gasoline selectivity, conversion, olefin hydrogenation and/or coke-make for the conversion of hydrocarbons to lower molecular weight products comprising gasoline by contacting said hydrocarbons with a circulating zeolite-containing cracking catalyst in a riser containing hydrogen, which is thereafter regenerated to remove at least a portion of carbon-on-catalyst, the improvement comprising in combination the steps of:
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a) maintaining a catalyst;
oil weight ratio of at least about 3; andb) adding to at least a portion of said cracking catalyst at least 2400 ppm of manganese and/or chromium, based on the weight of the catalyst; whereby gasoline selectivity is increased by at least 1.0 wt. % (measured at 75 weight % conversion) and conversion is increased by at least 2 wt. %;
both as compared to said process without said manganese or chromium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 39, 40)
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- 9. An improved selectivity, improved activity, reduced coking process for conversion of hydrocarbon feed containing more than 1 ppm of nickel and 1 ppm of vanadium comprising contacting said hydrocarbons with a circulating cracking catalyst containing at least 2400 ppm of manganese under cracking conditions to produce products having lower average molecular weight than said feed.
- 25. A process for conversion of hydrocarbons containing more than 1 ppm of nickel and 1 ppm of vanadium comprising contacting said hydrocarbons with a circulating cracking catalyst which is gasoline-, coke-, and hydrogen-selective containing 2400 ppm to 20 wt % manganese, having a selectivity advantage as compared to an equivalent catalyst without manganese.
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35. A process for conversion of hydrocarbons containing more than 1 ppm of nickel and 1 ppm of vanadium utilizing a circulating equilibrium cracking catalyst comprising 2000 ppm to 20 wt. % chromium.
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38. In a process for improving conversion, gasoline selectivity, increasing coke selectivity, reducing the sulfur in gasoline, and promoting the direct hydrogenation of olefins while converting hydrocarbons to lower molecular weight products by contacting hydrocarbons to be converted in the riser with a circulating zeolite-containing cracking catalyst, which is thereafter regenerated to remove at least a portion of carbon-on-catalyst;
- the improvement comprising utilizing a catalyst which has been impregnated (during manufacture) with about 9200 ppm to 20 wt. % of manganese, based on the weight of the catalyst;
whereby gasoline selectivity is increased by at least 0.2 wt. % (measured at 75 wt. % conversion) as compared to said process utilizing a catalyst without said manganese.
- the improvement comprising utilizing a catalyst which has been impregnated (during manufacture) with about 9200 ppm to 20 wt. % of manganese, based on the weight of the catalyst;
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41. In a process for improving the gasoline selectivity, conversion, coke selectivity, the sulfur in gasoline, and/or direct hydrogenation of olefins while converting hydrocarbons to lower molecular weight products by contacting hydrocarbons to be converted in the riser with a circulating zeolite-containing cracking catalyst, which is thereafter regenerated to remove at least a portion of carbon-on-catalyst;
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a) the improvement comprising utilizing a catalyst which has been impregnated (during manufacture) with about 9200 ppm to 20 wt. % of manganese or manganese compound, based on the weight of the catalyst; and b) maintaining a sodium content of more than of about 0.5% by weight, based on the weight of the catalyst; whereby gasoline selectivity is increased by at least 0.2 wt. % (measured at 75 wt. % conversion) as compared to said process utilizing a catalyst without said manganese.
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Specification