The present invention provides catalysts, methods, and reactor systems for converting oxygenated hydrocarbons to oxygenated compounds. The invention includes methods for producing cyclic ethers, monooxygenates, dioxygenates, ketones, aldehydes, carboxylic acids, and alcohols from oxygenated hydrocarbons, such as carbohydrates, sugars, sugar alcohols, sugar degradation products, and the like, using catalysts containing Group VIII metals. The oxygenated compounds produced are useful in the production of liquid fuels, chemicals, and other products.

The invention relates to the preparation of a catalyst containing: a mainly aluminum oxide calcined support; a hydro-dehydrogenating active phase containing at least one metal of group VIB,
the process including:
a) a first precipitation step of at least one basic precursor and at least one acidic precursor,
b) a heating step,
c) a second precipitation step by addition to the suspension of at least one basic precursor and at least one acidic precursor,
d) a filtration step;
e) a drying step,
f) a moulding step,
g) a heat treatment step;
h) an impregnation step of the hydro-dehydrogenating active phase on the support obtained in the step g).

The invention relates to the preparation of a catalyst containing: a mainly aluminum oxide calcined support; a hydro-dehydrogenating active phase containing at least one metal of group VIB,
the process including:
a) a first precipitation step of at least one basic precursor and at least one acidic precursor,
b) a heating step,
c) a second precipitation step by addition to the suspension of at least one basic precursor and at least one acidic precursor,
d) a filtration step;
e) a drying step,
f) a moulding step,
g) a heat treatment step;
h) an impregnation step of the hydro-dehydrogenating active phase on the support obtained in the step g).

Process of preparing hydroconversion catalyst comprising: a calcined, predominantly alumina, oxide support; a hydrogenating-dehydrogenating active phase comprising group VIB metal, the catalyst having: specific surface area ?100 m.sup.2/g, total pore volume ?0.75 ml/g, median mesopore diameter by volume ?18 nm, mesopore volume ?0.65 ml/g, macropore volume 15-40% of total pore volume; comprising: a) dissolving acidic aluminum precursor; b) adjusting pH with basic precursor; c) co-precipitating acidic and basic precursors, at least one containing aluminum, to form suspension of alumina gel with a targeted alumina concentration; d) filtration; e) drying to a powder; f) forming; g) thermal treatment to an alumina oxide support; h) impregnating of the hydrogenating-dehydrogenating active phase on the alumina oxide support. Catalyst prepared by this process and use thereof for hydrotreating or hydroconverting heavy hydrocarbon feedstocks.

Process of preparing hydroconversion catalyst comprising: a calcined, predominantly alumina, oxide support; a hydrogenating-dehydrogenating active phase comprising group VIB metal, the catalyst having: specific surface area ?100 m.sup.2/g, total pore volume ?0.75 ml/g, median mesopore diameter by volume ?18 nm, mesopore volume ?0.65 ml/g, macropore volume 15-40% of total pore volume; comprising: a) dissolving acidic aluminum precursor; b) adjusting pH with basic precursor; c) co-precipitating acidic and basic precursors, at least one containing aluminum, to form suspension of alumina gel with a targeted alumina concentration; d) filtration; e) drying to a powder; f) forming; g) thermal treatment to an alumina oxide support; h) impregnating of the hydrogenating-dehydrogenating active phase on the alumina oxide support. Catalyst prepared by this process and use thereof for hydrotreating or hydroconverting heavy hydrocarbon feedstocks.

The invention discloses a binder-free high strength and low steam-to-oil ratio ethylbenzene dehydrogenation catalyst, which is characterized by comprising the following components in percentage by weight: (a) 60-85% Fe.sub.2O.sub.3; (b) 3-25% K.sub.2O; (c) 0.1-5% MoO.sub.3; (d) 3-20% CeO.sub.2; (e) 0.1-5% CaO; (f) 0.1-5% Na.sub.2O; (g) 0.1-5% MnO.sub.2, wherein the weight ratio of sodium oxide to manganese dioxide is 0.1-10; (h) 0.1-100 ppm of at least one element or oxide of Pb, Pt, Pd, Ag, Au, Sn; and no binder is added during the preparation of the catalyst. The low steam-to-oil ratio ethylbenzene dehydrogenation catalyst provided by the present invention contains no binder and maintains high strength, and has high activity and stability at low steam-to-oil ratio.

The invention discloses a binder-free high strength and low steam-to-oil ratio ethylbenzene dehydrogenation catalyst, which is characterized by comprising the following components in percentage by weight: (a) 60-85% Fe.sub.2O.sub.3; (b) 3-25% K.sub.2O; (c) 0.1-5% MoO.sub.3; (d) 3-20% CeO.sub.2; (e) 0.1-5% CaO; (f) 0.1-5% Na.sub.2O; (g) 0.1-5% MnO.sub.2, wherein the weight ratio of sodium oxide to manganese dioxide is 0.1-10; (h) 0.1-100 ppm of at least one element or oxide of Pb, Pt, Pd, Ag, Au, Sn; and no binder is added during the preparation of the catalyst. The low steam-to-oil ratio ethylbenzene dehydrogenation catalyst provided by the present invention contains no binder and maintains high strength, and has high activity and stability at low steam-to-oil ratio.

A hydroprocessing catalyst or catalyst precursor has been developed. The catalyst is a transition metal tungstate material, or the decomposition product thereof. The hydroprocessing using the crystalline transition metal molybdotungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

A hydroprocessing catalyst or catalyst precursor has been developed. The catalyst is a transition metal tungstate material, or the decomposition product thereof. The hydroprocessing using the crystalline transition metal molybdotungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

A hydroprocessing catalyst or catalyst precursor has been developed. The catalyst is a unique crystalline ammonia transition metal molybdotungstate material. The hydroprocessing using the crystalline ammonia transition metal molybdotungstate material or a decomposition product thereof may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.