Exxon Research and Engineering Company

Neville L Cull

Willard H Sawyer

Lloyd A Pine

Dale D Maness

Martin O Gernand

Warren M Smith

Paul E Eberly

John M Longo

A phosphorus-containing low alkali metal content zeolitic catalyst made from a clay starting material is provided. The catalyst is obtained by contacting a partially cation exchanged calcined zeolite-containing catalyst with a dihydrogen phosphate anion or a dihydrogen phosphite anion. A hydrocarbon catalytic cracking process utilizing the phosphorus-containing catalyst is also provided.

Phosphorus-containing catalyst and catalytic cracking process utilizing

Phosphorus-containing catalyst

A catalyst comprising Group VIB and Group VIII metal components and a support prepared by treating alpha alumina monohydrate with an acid solution comprising a hydrolyzable metal salt, such as zirconium nitrate.

Hydroprocessing catalysts

A catalyst is provided which comprises an ultrastable Y-type crystalline aluminosilicate zeolite, an alumina-aluminum fluorophosphate and a hydrogenation component. Hydrocarbon hydroprocessing processes utilizing the catalyst are also provided.

Hydrocracking over alumina-aluminum fluorophosphate-containing catalysts

The disclosed invention embodies both catalyst and process. The catalyst is comprised of a Group VIII metal, preferably a noble metal, especially platinum, or copper composited with a low acidity inorganic oxide base, preferably alumina. A bed of the catalyst is contacted at elevated temperature with nitrogen oxide containing gas at net reducing conditions to convert the nitrogen oxide to non-corrosive, innocuous by-products to render the gas useful for reservoir pressure maintenance injection needs. In all embodiments, the base with which the metal, or metals, is composited is one having an acidity ranging from about +6.8 to about +0.8 Ho (Hammet acid function), preferably from about +6.8 to about +1.5 Ho. Inorganic oxide bases, especially alumina, which exhibit a weakly acidic Hammet acidity function, Ho.gtoreq.+0.8, when impregnated with a noble metal, or copper, show a marked improvement in NO.sub.x removal vis-a-vis catalysts prepared by impregnating more strongly acidic aluminas with said metal species.

Treatment of reducing gas for suppression of corrosiveness

Alumina-aluminum fluorophosphate-containing catalysts

A catalyst comprising an ultrastable Y-type crystalline aluminosilicate zeolite, alumina, zirconia and a hydrogenation component is prepared by specified methods. The catalysts are suitable as hydrocarbon hydroprocessing catalysts.

Zirconia-containing catalysts

A combination process is provided in which a gaseous mixture comprising SO.sub.x and NO.sub.x is reacted with cerium oxide at a temperature ranging from about 500.degree. C. to about 700.degree. C. to form cerium oxysulfate and a gas which is at least partially desulfurized. The latter is contacted with cerium oxysulfate at a temperature ranging from about 500.degree. C. to about 700.degree. C. in the presence of ammonia at net oxidizing conditions to reduce the NO.sub.x content of the gaseous mixture. The process may be conducted in one reaction zone or in a plurality of reaction zones. The cerium oxide reactant may be regenerated by reacting cerium oxysulfate with a reducing gas such as hydrogen.

Process for the removal of SO.sub.x and NO.sub.x from gaseous mixture

High surface area aluminum phosphate-alumina compositions are prepared by reaction of a mixture comprising an aluminum alkoxide and an organic phosphate such as trialkyl or triaryl phosphate, in the presence of moist air to form a precipitate, separating the precipitate from the mixture, drying and calcining the precipitate and recovering a high surface area aluminum phosphate-alumina product which can be used as catalyst support or catalyst component, especially for hydrocarbon treating and conversion processes.

Aluminum phosphate-alumina compositions and catalysts comprising the same

High surface area, low bulk density silica-titania materials which are particularly effective as catalysts or catalyst supports are prepared by mixing a silicon alkoxide, a titanium alkoxide and an organic diluent, adding the resulting premixed alkoxides to a hydrolysis medium comprising water and a solvent to form a silica-titania precipitate, separating the silica-titania precipitate from the hydrolysis medium, drying and calcining the precipitate and recovering the resulting high surface area silica-titania product.

Process for the preparation of silica-titania and catalysts comprising

Process for preparing shaped base materials for use in solid catalysts for commercial processes. The solid contact material is prepared by pre-soaking a porous solid particulate carrier material in an organic liquid, immersing the carrier without drying in a dilute acid solution for a given time interval, washing, drying and calcining the impregnated carrier. After calcination, the carrier is impregnated with an active material.

Method for treating sulfur dioxide with sorbent

Method for acid treating solid supports

Process for preparing surface impregnated catalysts and sorbents, and flue gas desulfurization process using the same. The sorbent is produced by pre-soaking a porous solid particulate carrier material in a polar organic liquid such as a C.sub.5 -C.sub.10 alcohol, immersing the carrier without drying in an impregnating solution for a time sufficient to permit the impregnating solution to penetrate to a controlled depth without totally impregnating the carrier, and drying and calcining the impregnated carrier, whereby a contact material having an inner zone of substantially unimpregnated carrier and an outer zone of carrier impregnated with active material is produced. Sulfur dioxide is removed from flue gas by contacting the flue gas with a sorbent thus prepared. The preferred carrier for flue gas desulfurization is alumina and the preferred active material is copper oxide.

Sorbent preparation and process using same

Sulfur dioxide is removed from flue gases by contacting the flue gas at elevated temperature with a sorbent comprising a shaped refractory substrate of low surface area and an adherent oxide film impregnated with a transition metal or metal oxide which is selective for the removal of sulfur oxide from gas mixtures on the external surface of the substrate. A technique for laying down the adherent oxide film on the refractory substrate is also disclosed.

Flue gas desulfurization sorbent and process

Hydrogen sulfide is removed from a gaseous mixture by reaction with tellurium dioxide. After the reaction, the resulting tellurium can be reoxidized.

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Baker, LA, United States of America

Neville L Cull