276results about How to "Low aromatic content" patented technology

A two-way combined process of wax oil hydro-process and catalytic crack is carried out by entering wax oil, catalytic cracking re-circulating oil and catalytic cracking diesel oil into hydro-processor, hydrogenation reacting under existence of hydrogen and hydrogenation catalyst, separating for reactant to obtain gas, hydrogenation naphtha oil, hydrogenation diesel oil and hydrogenation tail oil, entering hydrogenation tail oil into catalytic cracker, crack reacting under existence of catalytic cracking agent, separating to obtain dry gas, liquefied gas, catalytic cracking gasoline, catalytic cracking diesel oil and catalytic cracking re-circulating oil and oil slurry, and circulating for catalytic cracking diesel oil and catalytic cracking re-circulating oil to hydro-processor. It has higher recovery rate and cetyl value, less sulfur content, arene content and coke output.

The invention discloses a hydrocracking method for selective increasing of an aviation kerosene yield. The hydrocracking method comprises that raw oil and hydrogen are mixed and then orderly undergo a hydrofinishing reaction and a hydrocracking reaction; a reaction effluent is cooled and is subjected to separation so that a heavy diesel fraction is obtained; and the heavy diesel fraction having the content of 10 to 100% and a temperature of 320 to 370 DEG C is fed back to a raw material tank and then undergoes a reaction sequentially, wherein the heavy diesel fraction has low aromatic hydrocarbon content and naphthenic hydrocarbon content and is an appropriate fraction for selective increasing of aviation kerosene yield. The hydrocracking method realizes high selectivity of an aviation kerosene fraction. The recycle heavy diesel fraction is fed into the raw material tank and undergoes a hydrofinishing reaction in a hydrofinishing reactor and a hydrocracking reaction in a hydrocracking reactor so that an aromatic hydrocarbon further undergoes a hydrogenation saturation reaction. Therefore, the hydrocracking method is conducive to improvement of a smoke point of aviation kerosene and reduction of aromatic hydrocarbon content of aviation kerosene.

A process for preparing the clean diesel oil by hydromodifying, isomerizing and lowering pour point features that the fractional oil raw material and H2 pass through a catalyst bed to obtain clean high-quality diesel and the naphtha product with low contents of sulfur and nitrogen and high content of arylhydrocarbon. Said catalyst bed contains hydrocatalyst bed containing beta zeolite (0.5-20 wt.%).

The invention discloses a two-stage method coal tar hydro-upgrading method. Coal tar is subject to the atmospheric distillation and/or the reduced pressure distillation and is cut into coal tar light cut and coal tar heavy cut; after the coal tar light cut and optional distillate oil are mixed with hydrogen, the mixture enters a first hydrogeneration reaction zone and performs the contact reaction with hydrorefining catalyst; gas phase impurities of a reaction effluent is removed through an intermediate flash distillation column or a high-pressure stripping tower, and then the reaction effluent enters a second hydrogeneration reaction zone to perform the contact reaction with the hydro-upgrading catalyst or the hydrocracking catalyst; and the obtained reaction effluent is cooled, separated and fractionated to produce diesel fraction and naphtha cut. The invention provides a clean and effective coal tar processing and utilizing method, the coal tar light cut is hydro-upgraded to produce diesel oil for vehicles, the sulfur content of the obtained diesel product is less than 50 mu g/g, the content of polycyclic aromatic hydrocarbon is less than 11 weight percent, and the diesel oil cetane number of the product is improved by not less than 20.

A process for preparing high-quality diesel oil or jet fuel from liquefied coal oil with the highest output includes filtering, stable hydrogenation to obtain diesel oil fraction and tail oil fraction, modifying them by deep hydrogenation, separating its product to obtain gas, naphtha fraction, diesel oil fraction, jet fuel, and tail oil fraction, and cyclic use of hydrogen-enriched gas. Its advantages are high output rate of diesel oil (more than 70 wt.%), low contents of S and N, low density and high hexadecane number.

The invention provides a Fischer-Tropsch jet fuel refining process which has a jet fuel yield in excess of 60% by mass, said process including at least four of the following five conversion processes: a. hydrocracking one or more of a FT kerosene and heavier material fraction and a C9 and heavier FT syncrude fraction; b. oligomerising an FT syncrude fraction including hydrocarbons in the range C2 to C8; c. hydrotreating one or more of an FT syncrude fraction, a product from process b., and an alkylated FT syncrude fraction; d. aromatizing one or more of an FT syncrude fraction including hydrocarbons in the range C2 to C8, a product from process a., a product from process b, a product from process c., and a product from an aromatic alkylation process; and e. alkylating one or more of an FT syncrude fraction including hydrocarbons in the C2 to C6 range, a product from process b., and a product from process d.

The present invention relates to process for producing hydrocarbons, wherein starting material comprising tall oil material and polar co-feed, which polar co-feed comprises fatty acids, is diluted with a non-polar diluent to obtain feedstock, and said feedstock is catalytically hydroprocessed to obtain hydrocarbons, suitable as fuels, fuel blending components and fuel additives.

A hydrocracking process for increasing the output of intermediate fractional oil to maximum features that the hydrorefined heavy petroleum hydrocarbon is contacted first with the beta-zeolite hydrocracking catalyst for cracking the most of raw material and then with the Y-zeolite hydrocracking catalyst for cracking the rest of raw material. Its advantages are high selectivity and low content of olefin in intermediate fractional oil.

Hydrocarbon fluids are produced by hydrocracking a vacuum gas oil stream, fractionating and/or hydrogenating the hydrocracked vacuum gas oil. The fluids typically have ASTM D86 boiling point ranges within the range 100° C. to 400° C. the range being no more than 75° C., they also have a naphthenic content greater than 60%, the naphthenics containing polycyclic materials, an aromatic content below 2% and an aniline point below 100° C. The fluids are particularly useful as solvents, for printing inks, drilling fluids, metal working fluids and as silicone extenders.

The present invention relates to propylene producing catalytically cracking process, and is especially propylene producing process with catalytically cracking aluminum silicophosphate. In fixed bed or fluidized bed reactor and at the conditions of temperature 350-550 deg.c, pressure 0.1-0.3 MPa and space velocity 0.1-300 /hr, dry gas, C4 component and other material are cracked in catalyst containing aluminum silicophosphate molecular sieve SAPO-34. The output hydrocarbon mixture is separated to obtain destination product propylene before the other components are returned to the reactor for circular use. The process of the present invention has low reaction temperature, pressure near normal pressure, simple technological process and high propylene selectivity. The present invention can utilizes dry gas and C4 component effectively.

Hydrocarbon fluids are provided which have ASTM D-86 boiling point ranges within 235° C. to 400° C. and a naphthenic content greater than 60%, the naphthenics containing polycyclic materials, the fluids preferably have an aromatic content below 2% and an aniline point below 100° C. The fluids are particularly useful solvents for printing inks, drilling fluids, metal working fluids and as silicone extenders.

The invention discloses transformer oil with excellent cooling heat-radiating and moisture preventing properties. The transformer oil is mainly prepared from the following raw materials: hydrogenated stock oil, naphthene thickened oil, an antioxidant and a metal passivator, wherein the ratio of the hydrogenated stock oil to the naphthene thickened oil is (72-82):(18-28) in terms of parts by weight, the amount of the used antioxidant accounts for 0.3-0.5% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil, and the amount of the used metal pasivator accounts for 0.1-0.2% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil. The invention further discloses a preparation method of the transformer oil. The transformer oil has excellent cooling heat-radiating and moisture preventing properties, thus being very suitable for being used in southern areas of China.

A carrier of hydrocatalyst for the hydrocracking of heavy oil, hydromodifying of poor diesel oil, etc is prepared from amorphour silicon aluminium, modified beta-molecular sieve and aluminium oxide. Its preparing process is also disclosed. Said catalyst has high catalytic activity.

The invention discloses a process for producing solvent oil by removing aromatic hydrocarbon from raffinate oil, which comprises the following steps of: (1) rectifying raffinate oil, and removing sulfolane, water and colloid substances from the raffinate oil; (2) completely hydrogenating the raffinate oil obtained in the step (1) under the action of a benzene hydrogenation catalyst; and (3) removing excessive hydrogen from the product of the step (2) by separating, rectifying and collecting the product at the top of a rectifying tower to obtain solvent oil No.6 or normal hexane. In the method, all the raw materials are cleaned, hydrogenated and separated, reformed circulating hydrogen can be used, and the distillation range of the product is controllable. The content of aromatic hydrocarbon in the obtained product is trace, and the bromine number is lower than 100 mgBr/100g.

The invention discloses a combined process for delayed coking and hydrotreating, which comprises the following steps that: a coking raw material is heated to enter a coking tower to react, oil gas escapes from the top of the coking tower, gas components and liquid components are separated, and the cycle ratio in a coking process is 0; and the liquid components are mixed with hydrogen to react in ahydrogenation reactor, then the obtained hydrogenated reaction effluent is distilled to obtain hydrogenated naphtha, hydrogenated diesel oil and hydrogenated wax oil, and the hydrogenated wax oil used as a high-quality raw material is fed into a catalytic cracking device or a hydrocracking device. By adopting the process flow of zero circulation of a coking device, the method provided by the invention furthest improves the yield of a liquid product, improves the processing depth of heavy oil, saves a coking fractionating tower, and achieves the aims of optimizing the flow and reducing the investment; and by adopting reasonable graduation of a hydrogenation catalyst, the method can furthest take account of the running period and the refining depth of each coking product fraction.

The present invention discloses a hydrocracking process for raising refined diesel oil quality, and is mainly characterized by that the poor diesel oil is undergone the process of hydrodesulfurization treatment, then the desulfurized refined diesel oil is mixed with the refined hydrocracked raw material oil, and fed into the hydrocracking reactor, and the sulfur and nitrogen contents in the mixed oil of the refined diesel oil and refined hydrocracked raw material oil must meet the feeding requirements of hydrocracking reactor. As compared with existent technology said invention can utilize hydrocracking equipment to raise the quality of refined poor diesel oil and can obtain high-quality clean fuel.

The invention discloses a method for hydrotreating ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protective agent, a hydrogenation refining catalyst, a hydrogenation carbon residue catalyst and a hydrocracking catalyst in turn, reacting to obtain products, and separating the products to obtain gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst in turn to obtain hydro-conversion generated oil, wherein partial hydro-conversion generated oil is circulated to enter a hydrogenation reaction area, and the rest hydro-conversion generated oil is separated to form gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, full fractions of the ethylene tar are fully utilized and the added value of the ethylene tar is improved.

The invention relates to a barium-free soft film antirust oil. In terms of 100% of the total weight of the barium-free soft film antirust oil, the barium-free soft film antirust oil comprises the following components: 10-20% of refined mineral oil, 10-25% of a compound barium-free antirust agent, 2-5% of a film-forming agent, 0.5-1.5% of an antioxidant, 0.1-1.5% of a copper corrosion inhibitor, 0.5-3% of dibutyl phthalate, 0.5-3% of Span 80, and the balance dearomatization solvent oil. Specifically, the compound barium-free antirust agent comprises petroleum calcium sulfonate, calcium dinonylnaphthalene sulfonate and a gemini imidazoline corrosion inhibitor. The soft film antirust oil provided by the invention has low solvent oil aromatic hydrocarbon content, does not contain barium or other heavy metals, while meeting the environmental protection requirements of foreign environmental protection laws and regulations for exported metal product antirust materials, greatly improves the rust-proof performance of products, is applicable to medium and long-term storage and package rust prevention of ferrous metal products and copper-containing metal workpieces, also has excellent storage stability, is free of precipitate after long-term placement, and the oil film is thin and easy to clean, and can achieve assembly with oil.

The invention discloses a process of hydrogenation for coal liquification oil on boiling bed. The process employs hydrogenation catalyst which contains fiber adjuvant, the fiber adjuvant content in catalyst is 3- 10 wt%. The mechanical strength and wearing resistance are strong, so it can remove nitrogen and sulfur from coal liquification oil maximumly, reduces olefin and aromatic hydrocarbons content, increases product stability and provides high performance coal liquification solvent oil.

The invention relates to a method for producing a high-quality low-freezing diesel oil, which is characterized in that a diesel oil raw material is contacted with a Hydrobon catalyst in a first hydrogenation reaction zone for reaction, an effluent is directly introduced in a second reaction zone without separating, and is contacted with a hydrogenation modified pour point depression catalyst for a pour point depression reaction, an effluent in the second reaction zone is introduced in the separating system and the fractionation system, the heavy diesel fuel fraction at the bottom of a fractionate tower is circularly introduced in an inlet of the second reaction zone. According to the invention, the hydrogenation modified pour point depression catalyst is employed for obviously reducing the condensation point of the diesel oil fraction, the heavy diesel fuel component with high condensation point is circularly introduced in the second reaction zone for remodifying the pour point depression reaction, and the target product yield can be increased.