The way the joint production of solvents for polymerization purity and high-octane additives for fuels

The invention relates to petrochemistry and oil refining, namely the catalytic hydrogenation of unsaturated and aromatic hydrocarbons

Invention relates to methods of producing liquid hydrocarbons from methane. Disclosed is a method of converting methane into liquid hydrocarbons, in which material containing methane is brought into contact with a dehydrocyclisation catalyst under conditions suitable for conversion of said methane to aromatic hydrocarbons, including naphthalene, and obtaining a first effluent containing hydrogen and at least 5 wt % aromatic hydrocarbons more than said starting material. At least a portion of aromatic hydrocarbons from the first effluent then reacts with hydrogen to form a second effluent having lower content of benzene compared to said first effluent, and at least a portion of hydrogen from the first effluent reacts with carbon monoxide, carbon dioxide or mixture thereof to obtain an additional effluent containing water and a hydrocarbon, and at least a portion of the hydrocarbon in said additional effluent is returned to said contact step.

Invention relates to a method which involves steps of hydrogenating a mixture of secondary gas oil fractions in severe conditions at pressure of 270-300 kg/cm² (hydrogen pressure not lower than 200 kg/cm²), temperature of 300-400°C, volume rate of feeding material of 0.3-1.0 h^-1 and ratio of circulation gas to material of not less than 2000:1 (ratio of hydrogen to material of not less than 1500:1); a diesel fraction is separated from the hydrogenation products by fractionation; the diesel fraction is oxidised by mixing with oxidised diesel fuel to content of peroxide compounds of 3-5 mmol/kg, where aromatic (monocyclic, bicyclic, tricyclic) compounds, as well as paraffin-naphthene compounds are oxidised to form peroxide compounds in amount of 20-350 mmol/kg. The oxidised diesel fraction is compounded with the diesel fraction separated from hydrogenation products (non-oxidised) by fractionation to the required amount based on antiwear and cetane characteristics.

First raw stock comprises mainly hydrocarbons containing at least 4 hydrocarbon atoms and includes at least one unsaturated compound, including benzene, with the property that the above first raw stock is treated in a distillation zone, a zone of impoverishment and a zone of rectification united with a zone of hydrogenation reaction, at least partial, in regard to the zone of distillation, containing at least one catalytic layer. Hydrogenation of at least a part of unsaturated compounds comprising the first raw stock is carried out in the presence of a hydrogenation catalyst and a gas flow containing hydrogen. The first raw stock is extracted from the reaction area, at least at a level of extraction in the distillation zone. The reaction zone effluent, at least partially, is again introduced to the distillation zone, at least at the level of repeated introduction in order to ensure continuity of distillation and to receive the effluent impoverished by the unsaturated compounds in the upper part of the distillation zone, a lateral branch to the distillation zone and in the lower part of the distillation zone. The method includes treatment of at least one second raw stock comprising at least one unsaturated compound, including benzene, at least partially injected to the zone of hydrogenation reaction being external in regard to the distillation zone. At that in the second raw stock benzene content varies from 2 vol.% up to 10 vol. %.

Invention is related to the hydrogenisation of a low-sulphur raw material containing less than 15 mln^-1 of sulphur up to liquids with a very low content of sulphur and aromatic compounds containing less than 5 mln^-1 of sulphur and less than 100 mln^-1 of the aromatic compounds boiling within the range from 150 up to 400°C and having the boiling temperature range less than 80°C. The method includes a stage of the catalytic hydrogenation of the above raw material at a temperature from 80 up to 180°C and pressure from 60 up to 160 bar, consisting of two or three stages of hydrogenisation with a nickel-containing catalyst wherein each stage of hydrogenisation is carried out in a separate reactor, and a stage of hydrogenised products fractionating up to the liquids having certain boiling ranges.

Present invention relates to a sulphur-resistant, noble metal-containing catalyst for hydrogenating aromatic compounds, a method of producing said catalyst and a method of hydrogenating aromatic compounds. Described is a method of preparing a catalyst composition for hydrogenating aromatic compounds which is resistant to the poisonous effect of sulphur, having surface area ranging from 300 m²/g to 600 m²/g, where the said method involves: combined grinding of a zirconium compound and an inorganic oxide selected from a group comprising silicon dioxide, aluminium oxide and silicon dioxide-aluminium oxide to form a mixture; forming a particle agglomarate containing said mixture; calcining said particle agglomerate to obtained calcined particles suitable for use as a catalyst support; and adding a noble metal to said catalyst support, said noble metal being selected from a group comprising platinum, palladium and combination thereof, to obtain an intermediate catalyst composition. Described is a catalyst for hydrogenating aromatic compounds with surface area ranging from 300 m²/g to 600 m²/g, which is resistant to the poisonous effect of sulphur and containing: a noble metal selected from a group comprising platinum, palladium and combination thereof, and a calcined mixture as the catalyst support, in which before calcination, said mixture contains a zirconium compound and an inorganic compound selected from a group comprising silicon dioxide, aluminium oxide, silicon dioxide-aluminium oxide, and in which said noble metal is present in the said catalyst for hydrogenating aromatic compounds in amount ranging from 0.01 wt % to 5 wt %, wherein the wt % is taken relative to the elementary metal, and in which said catalyst for hydrogenating aromatic compounds contains 1-30 wt % zirconium dioxide and 60-99 wt % said inorganic oxide. Described is a method of hydrogenating aromatic compounds of hydrocarbon material containing sulphur compounds using the described catalyst. Described is a composition for hydrogenating aromatic compounds obtained using the method described above.