719results about How to "Increase cetane number" patented technology

The invention relates to chemical industry and is directed to the production of middle distillate from vegetable oils. In the first step of the production method, the fatty acids or triglycerides of said vegetable oils are hydrogenated to give n-paraffins, and in the second step, the n-paraffins are catalytically converted to paraffins with branched chains. Using this process having two steps, a high-quality middle distillate useful as a component of diesel fuels without any particular specifications may be produced.

Processes for the conversion of hydrocarbons boiling in the temperature range of from about 80° F. to about 1000° F. to diesel boiling range hydrocarbons, and processes for increasing the cetane number and amount of n-C₁₇ hydrocarbon products in such processes. Diesel boiling range hydrocarbons may be produced by contacting a hydrocarbon boiling in the above-mentioned boiling range with a triglyceride-containing compound to form a mixture, and then contacting the mixture with a hydrotreating catalyst under suitable reaction conditions.

The invention is directed to a fuel composition for diesel engines. The fuel composition comprises 0.1-99% by weight of a component or a mixture of components produced from biological raw material originating from plants and/or animals and/or fish. The fuel composition comprises 0-20% of components containing oxygen. Both components are mixed with diesel components based on crude oil and/or fractions from Fischer-Tropsch process.

The combined hydrogenation method of producing diesel oil with high cetane number and low solidifying point includes contacting the raw material oil and hydrogen with hydrogenating upgrading catalystor hydrogenating cracking catalyst first, contacting the unseparated reaction effluent with pour point reducing hydrocatalyst feeding the cooled reaction product into high pressure separator to separate liquid product further flowing to the fractionating system and returning the hydrogen-rich gas to reactor. The said method can raise the cetane number of diesel oil and lower the solidifying pointsimultaneously in the same equipment.

The invention discloses a hydro-upgrading catalyst for inferior diesel and a preparation method thereof. The preparation method comprises the steps of: mixing, forming and roasting silicon oxide-alumina, alumina and/or a precursor of the alumina and Y-shaped molecular sieve, then introducing an effective dose of metallic components selected from at least one Group VII and at least one Group VI into the roasted forming composition; the preparation method is characterized in that the silicon oxide-alumina is selected from at least two the silicon oxide-alumina having different N values, the difference between the N values of the silicon oxide-alumina is 0.02-0.2. Compared with the prior art, the catalyst provided by the invention method has better upgrading performance for the inferior diesel.

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.

A hydrotreating catalyst of inferior diesel consists of alumina 20.0í½80.0wt% and molecular sieve 3.0í½60.0w%. The catalyst is prepared by loading at least one Fe, Co and Ni metal of ó° family and MO and W metal of ó÷B family as metal active component and adding one or above oxide or fluorinated compound of titanium, magnesium, zirconium, lanthanum, iron, phosphorus, silicon and boron as active auxiliaries. It can decrease content of sulfur and arenes and increase cetyl value in products. It can be used for cryogenic hydrogenation desulfurization, denitridation and hydrogenation dearomatization.

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.

The present invention comprises a thermo catalytic process to produce diesel oil from vegetal oils, in refineries which have two or more Catalytic Cracking (FCC) reactors. At least one reactor processes heavy gasoleum or residue in conventional operation conditions while at least one reactor processes vegetal oils in proper operation conditions to produce diesel oil. This process employs the same catalyst employed in the FCC process, which processes conventional feedstocks simultaneously. This process transforms high heat content raw materials into fuel hydrocarbons. It shows excellent efficiency for the obtention of highly pure products and do not yield glycerin, one by-product of the transesterification process. The diesel oil produced by said process presents quality superior and cetane number higher than 40. Once cracking reactions occur at lower temperatures, it forms less oxidized product, which is consequently purer than those obtained by existent technology are.

A process for the conversion of coal into fuel bases comprises two successive direct liquefaction stages in ebullated bed reactors followed by a fixed bed hydrocracking stage. This process can produce excellent quality fuel bases (kerosene and diesel).

A process of the present invention for producing a hydrotreated gas oil has a step for obtaining a product oil having a total aromatic content of 3% by volume or less by hydrogenating a hydrotreated oil including 95% by volume or more of fraction having a boiling point range of 150-380° C., a sulfur content of 2-15 ppm by mass, a total aromatic content of 10-25% by volume, and a naphthene of 20-60% by volume in the presence of a hydrogenation catalyst; and a step for obtaining, by hydrogenating the above-described product oil in the presence of a hydrogenation catalyst containing a crystalline molecular sieve component, a product oil satisfying the conditions that the content of petroleum fraction having a boiling point range of lower than 150° C. is 16% by volume or less, and the sum of the total aromatic content and the total naphthene content is 80% or less relative to the sum of these in the hydrotreated oil.

High energy (e.g., ultrasonic) mixing of a liquid hydrocarbon feedstock and reactants comprised of an oxidation source, catalyst and acid yields a diesel fuel product or additive having substantially increased cetane number. Ultrasonic mixing creates cavitation, which involves the formation and violent collapse of micron-sized bubbles, which greatly increases the reactivity of the reactants. This, in turn, substantially increases the cetane number compared to reactions carried out using conventional mixing processes, such as simple mechanical stirring. Alternatively, an aqueous mixture comprising water and acid can be pretreated with an oxidation source such as ozone and subjected to ultrasonic cavitation prior to reacting the pretreated mixture with a liquid hydrocarbon feedstock.

The invention relates to a production method for ultra-low sulfur diesel oil; wherein, after mixed with hydrogen, straight-run atmosphere 3rd side cut distillate and (or) diesel oil heavy distillate enter(s) a first hydrogenation reaction zone and reacts under the action of hydro-upgrading catalyst and hydrofining catalyst; after mixed with the reaction effluent of the first hydrogenation reaction zone, straight-run atmosphere 2nd side cut distillate and (or) diesel oil light distillate enter(s) a second hydrogenation reaction zone and reacts under the action of the hydrofining catalyst; the reaction effluent of the second hydrogenation reaction zone is cooled, separated and distilled to obtain naphtha fraction and diesel products. The method provided by the invention can treat the diesel distillate with high sulfur, high nitrogen and high final boiling point, and under mild operating conditions, obtain clear diesel products with low content of sulfur and polycyclic aromatic hydrocarbons as well as high cetane number; meanwhile, the product quality can reach the indexes of the IV European emission standard.

Disclosed is a novel synthetic fuel as alternative to diesel, wherein said synthetic fuel comprises branched esters and wherein the fuel having improved fuel properties such as zero aromatic, zero olefin, zero sulphur, low pour, high cetane diesel fuel with improved lubricity and oxidative stability. Further, the present invention provides a method of preparation of said esters.

The invention discloses a method using the washing oil produced by the coal tar to prepare gasoline and diesel with hydrogen, which is essentially characterized in that the washing oil produced during the coal carbonization process is mixed with the hydrogen to obtain the hydrogenation oil through a reactor filled with protective agent, demetalization activator, hydrogenation refined activator and/or hydrogenation modified activator; the hydrogenation oil enters into a high-pressure separator; and the hydrogen obtained at the upper part is recycled to use, and the materials at the lower part are stripped or fractionated to obtain gasoline (naphtha) and diesel. The method can effectively produce high-quality and clean diesel products with washing oil.

The invention provides a hydrocracking method for catalytic cracking diesel. According to the method, a mixture of the diesel material and hydrogen is in contact reaction with a hydrorefining catalyst in a hydrorefining reactor, liquid efflux from the hydrorefining reactor is not separated and then enters a hydrocracking reactor to be in contact and react with a hydrocracking catalyst, the reaction efflux from the hydrocracking reactor is subjected to separation and fractional distillation to obtain hydrogen-rich gas, then light naphtha fraction, gasoline fraction, recycle fraction and diesel fraction are performed, in the distillation range of the recycle fraction, the temperature is 190 DEG C to 300 DEG C, and the recycle fraction returns to an inlet of the hydrocracking reactor. The method provided by the invention improves the composition of feed hydrocarbon of the hydrocracking reaction region, and the yield and the octane value of the gasoline fraction are effectively increased.

The process of the invention concerns a series of steps for preparing a solid lignocellulosic biomass type feed to supply a unit for gasification of that feed.

The process employs at least one step for maturing the feed in the presence of a liquid hydrocarbon phase at a temperature in the range 250° C. to 320° C. for a residence time of at least 10 minutes, and milling the solid fragments which have thus been heat-treated in the presence of liquid hydrocarbon to obtain a suspension of solid in the divided form with a characteristic dimension of less than 150 micrometres.

The invention also concerns a device for carrying out the process.

The present invention relates to a system for producing diesel of high quality and method thereof. The system comprises an extraction unit. The system is characterized in that the top of the extraction unit is connected with a raffinate-oil washing tower via pipes, the top of the raffinate-oil washing tower is connected with a hydrogenation reaction system via pipes, products are extracted from the bottom of the hydrogenation reaction system via pipes, the bottom of the extraction unit is connected with a return washing tower via pipes, the top of the return washing tower is connected with an extract-oil washing tower via pipes, the bottom of the return washing tower is connected with a recovery tower, the top of the extract-oil washing tower is connected with a extract-oil cutting tower via pipes, the top of the extract-oil cutting tower is connected respectively with the bottom of the extraction unit and connected with the bottom of the return tower via pipes, light aromatic hydrocarbon products are directly extracted out from the side lines of the extract-oil cutting tower via pipes, heavy aromatic hydrocarbon products are directly extracted out from the bottom of the extract-oil cutting tower via pipes, the top of the recovery tower is connected respectively with the bottom of the extraction unit and the bottom of the return tower, and the bottom of the recovery tower is connected with the top of the extraction unit via pipes. The hydrogenation unit is only applied to raffinate oil and extract oil with special requirements, so that the scale is small and the cost is low. Moreover, the diversification of raw materials processed by the system is obvious. Not only can straight-run diesel oil can be processed, but also the catalyzed diesel oil and the coking diesel oil can be processed. In addition, the invention separates aromatic hydrocarbon from diesel oil, therefore the cetane number of the diesel oil is improved greatly.

Hydrogenation of low-set point and high-cetyl value diesel oil is carried out by contacting raw material oil with hydrogen and hydrogenation refined catalyst in the first reactive area, entering reactant into the second reactive area to contact with hydrogenation modified catalyst, cooling, separating, returning the hydrogen-enriched gas separated into reactor to reuse, and entering the liquid product into fractional system. It has higher recovery rate, more cetyl of diesel oil and lower set point.

The present invention relates generally to a composition and method for increasing the amount of cetane in fuel. More specifically, it was discovered that the amount of cetane in fuel can be increased by mixing a fuel additive comprising β-carotene that was prepared in an inert atmosphere.