137results about How to "Moderate operating conditions" patented technology

The invention relates to a selective hydrodesulfurization catalyst contains cobalt and molybdenum as active components. The selective hydrodesulfurization catalyst is characterized in that silicon oxide and aluminum oxide are used as carriers of the catalyst; based on the total weight of 100%, the catalyst comprises 2-6wt% of cobalt oxide, 9-15 wt% of molybdenum oxide, 2-8wt% of alkaline earth metal oxide, 2-6wt% of phosphorus oxide, 3-5wt% of alkali metal oxide, 2-6wt% of silicon oxide and 54-80 wt% of aluminum oxide; and the catalyst has the specific surface area of 200-300m<2>/g and the pore volume of 0.5-0.7mL/g. The catalyst has high hydrogenation activity and selectivity, good stability, low research octane number loss and high liquid yield. The catalyst is suitable for selective hydrodesulfrization of low-quality gasoline and is particularly suitable for selective hydrodesulfrization of low-quality FCC (Family Car China) gasoline.

The invention provides a recovering system and a method of C2 in refinery dry gas by a compound adsorption method. The recovering system comprises a compressor, a pretreatment unit, a refinery dry gas cooling unit, a compound adsorption unit and a rectification unit. The adsorption unit comprises a gas-liquid separating tank, a C2 adsorption tower, and a methane desorption tower. The rectification unit comprises a C2 removing tower and an ethylene rectification tower. The refinery dry gas, after being compressed, pretreated and cooled, is subjected to gas-liquid separation to obtain a gas phase and a liquid phase. The gas phase is fed into the C2 adsorption tower and subjected to C2 adsorption by using a C4 mixture or a C5 mixture as an absorbent. The liquid phase is fed into the methane desorption tower, and subjected to methane desorption through stripping. The mixed adsorption oil at the bottom of the C2 adsorption tower and desorption gas at the top of the methane desorption tower are returned to the gas-liquid separation tank after being mixed and cold with the refinery dry gas. Tower bottom of the methane desorption tower is cooled and fed into the C2 removing tower and the ethane rectification tower to be rectified to obtain an ethylene product and an ethane product. The method provided by the invention adopts moderate operating conditions. The ethylene and the ethane both have the high recovering rate and the high purity.

The invention relates to a method for producing butadiene, which belongs to the technical field of alkenes production. In order to solve the problems that the prior process for producing the butadieneby combining selective hydrogenation alkyne removal and extraction has fluctuation operating pressure for an extracting tower and an uneconomic lightness-removing column, the invention discloses a novel process for producing the butadiene. Apart from the adoption of the process flow in combination of selective hydrogenation and extraction processes, the novel process sets a degassing tower at anextraction position on the top of the extracting tower so as to separate out the residual hydrogen and light components with less than four carbons after the hydrogenation reactions. The method can eliminate the adverse factors which influence the operation of the extracting tower in the prior art, avoids butadiene losses while removing the light components, and improves the yield of the butadiene.

The invention provides a separation and pressure reduction combining system for suspended bed hydrocracking reaction products. The system comprises a heat high-pressure separator, a pressure relief valve bank and a heat low-pressure separator, wherein a feeding hole for the suspended bed hydrocracking reaction products is formed in the upper part of the heat high-pressure separator; a cold hydrogen feeding hole is formed in the lower part of the heat high-pressure separator; a heat high-pressure separating gas outlet is formed in the top part of the heat high-pressure separator; a heat high-pressure separating liquid outlet is formed in the bottom of the heat high-pressure separator; the pressure relief valve bank comprises at least one set of valve bank; each set of valve bank comprises a venturi throttling element and an angle adjusting valve which are communicated with each other; a heat low-pressure feeding hole is formed in the upper part of the heat low-pressure separator; a heat low-pressure separating gas outlet is formed in the top of the heat low-pressure separator; a heat low-pressure separating liquid outlet is formed in the bottom of the heat low-pressure separator; the heat high-pressure separating liquid outlet is communicated with the venturi throttling element of the pressure relief valve bank; and the angle adjusting valve is communicated with the heat low-pressure feeding hole. The invention also provides a pressure reduction and separation method for the suspended bed hydrocracking reaction products by using the separation and pressure reduction combining system.

The invention belongs to the technical field of catalysis, and relates to a preparation method of a catalyst for hexone synthesis by acetone hydrogenation and an application; the catalyst is composed of active component nickel loaded on an alumina carrier modified by transition metal oxides. The preparation method of the catalyst comprises two procedures: the first one is that transition metal oxides and alumina are mixed, molded, dried, roasted, and subject to hydro-thermal treatment, and the active component Ni is immersed to obtain the catalyst; the second one is that an alumina carrier is prepared firstly, then transition metal oxides and Ni are introduced by an immersion method, and finally hydro-thermal treatment is performed to obtain the catalyst. The catalyst of the invention adopts non-noble metal as the main active component, is simple in preparation, low in cost, strong in raw material adaptability, long in service life, and high in activity and selectivity, and combines three catalytic functions of acetone condensation, dehydration, and hydrogenation as a whole, and the reaction process flow is simplified greatly.

This invention has disclosed a method of separating carbon5 by azeotropic rectification and extractive distillation. Its characteristic is it adopts azeotropic rectification to take off light-unit and heavy-unit gained isoprene- n-pentane azeotrope accord with polymerisation grade, then with extractive distillation make isoprene separated from n-pentane to get t polymerisation grade isoprene. Because targets that this invention extracts the distillation and deals with are only mixture of isoprene and n-pentane, but not make up carbon five hydrocarbon, thus greatly alleviated the questions of using solvents, such as solvent toxicity, retrieving , resolving , environmental protection, etc. When producing pure isoprene and n-pentane, this invention also could get 1,3-piperlene of high concentration.

The invention relates to a device for measuring the breakthrough sulphur capacity, which comprises a reactor, a gas supply source connected with one end of the reactor, a wet gas flow meter connected with the other end of the reactor, a valve arranged between the gas supply source and the reactor, and a hydrogen sulfide detector, wherein the hydrogen sulfide detector is arranged between the reactor and the wet gas flow meter and contains solution of silver nitrate. The invention also relates to a method for measuring the breakthrough sulphur capacity of a desulfurizing agent by using the device. The device is simple in design, the method for measuring the breakthrough sulphur capacity is simple, and the accuracy for measuring the breakthrough sulphur capacity is high.

The invention provides an integrated process method of producing low-carbon aromatic hydrocarbons and olefins from gas oil. The method includes: feeding gas oil to a gas oil hydrogenation refining unit to perform a refining reaction to obtain refined gas oil; feeding the refined gas oil to a hydrocarbon adsorption separation unit to prepare a non-aromatic hydrocarbon component and a heavy aromatichydrocarbon component; feeding the non-aromatic hydrocarbon component to a non-aromatic hydrocarbon cracking unit to obtain olefin-rich gas, cracked gasoline and cracked heavy oil through catalytic cracking or vapor cracking; feeding the heavy aromatic hydrocarbon component and the cracked heavy oil into a heavy aromatic hydrocarbon mild-hydrogenation cracking unit to perform a selective crackingreaction, thus obtaining an extract raw material; feeding the cracked gasoline to a cracked gasoline hydrogenation refining unit to perform a refining reaction to obtain the extract raw material; feeding the extract raw material into an aromatic hydrocarbon extract unit to prepare the low-carbon aromatic hydrocarbons. In the invention, firstly, the hydrocarbons in the gas oil are separated, and secondly, a processing technology is selected specifically to maximumly produce the low-carbon aromatic hydrocarbons and olefins. The method has advantages of strong raw material adaptability, high target product yield and mild operation conditions.

A process for preparing high quality diesel oil from poor-qualiry fraction oil includes such steps as hydrorefining, hydro-pour-depressing and arylhydrocarbon saturation. Its advantages are high hexadecame value, low pour point, and low contents of S and arylhydrocarbon.

The present invention discloses a catalytic cracking desulfurization method of low-grade gasoline in the field of petroleum processing technology and its equipment. It is characterized by that the invented gasoline upgrading reactor adopts gasoline fast bed reactor with cylindrical structure, a portion of spent catalyst can be passed through spent catalyst coveying pipeline with flow control valve and fed into catalyst mixer, and is mixed together with regenerated catalyst coming from regenerator under the action of aqueous vapor, then fed into gasoline fast bed reactor and is contacted with low-grade gasoline feed so as to make reaction to greatly reduce sulfur content of low-grade gasoline.

The invention relates to a mild hydrogenation extraction method for direct coal liquefaction oil, which comprises: blending the direct coal liquefaction oil with hydrogen to put into a steady hydrogenation reactor, carrying out desulfurization, denitrification, olefin saturation and aromatics saturation reaction under the action of a hydrotreating catalyst, separating and distilling the reaction product to obtain naphtha cut and diesel distillate, blending the obtained diesel distillate with the hydrogen, putting the mixture into a hydrogenation modification reactor to contact and react with a hydrogenation modification catalyst, separating and distilling the reaction product to obtain the diesel product. The method provided by the invention effectively combines a steady hydrogenation unit with a hydrogenation modification unit, and can product the diesel product with more than 45 of cetane number. The method has the advantages of mild operation condition, simple process, low investment, and low operation expense.

The invention discloses a method for producing epothilone B based on coupling of microbial fermentation and membrane separation techniques. The invention proposes a separation and fermentation coupling method mainly aiming at the problems that toxicity and feedback inhibition on cells are generated due to increase of a product epothilone B in the fermentation process, and bacteria growth in the fermentation process is affected. The method comprises the following steps: fermenting and cultivating, filtering by a micro-filtration membrane, carrying out ultrafiltration and nanofiltration, feeding materials, concentrating and extracting. The concentration of the fermentation liquor product epothilone B is reduced to a lower level, the growth inhibition action on the strain is relieved, the yield of the epothilone B is improved, the production cost is reduced, post-treatment of a fermentation liquor and refining of the product are facilitated, and large-scale production becomes possible, so that the method has a good industrial production prospect.

The invention relates to an asphalt mixture additive and a preparation method thereof. The asphalt mixture additive comprises the following components in parts by mass: 10-20 parts of a polymer, 5-10 parts of a cross linker, 10-20 parts of padding, 0.5-2 parts of a smog inhibitor, 1-2 parts of a plasticizer, 0.1-1 part of an antioxidant and 50-70 parts of matrix asphalt, wherein the matrix asphalt is one of Shell 70#, Shell 90#, SK70# or SK90#. Compared with the prior art, the asphalt mixture additive has the advantages that the anti-rutting performance and water damage resistance of an asphalt mixture can be significantly improved, the low-temperature cracking resistance and ageing resistance of asphalt concrete can be effectively improved, and the service life of asphalt roads is prolonged; meanwhile, the asphalt mixture additive can substitute about 15-25% of asphalt raw materials in the asphalt mixture, so that the production temperature is reduced to 140 DEG C, then the smoking phenomenon in the production and spreading processes is effectively reduced, and the asphalt mixture additive is energy-saving and environment-friendly; and the production method is simple, low in cost and suitable for industrialized production.

The invention discloses a pretilachlor microcapsule suspension and a preparation method thereof. The pretilachlor microcapsule suspension comprises following components in percentage by weight: 10 to30% of pretilachlor, 2 to 6% of capsule wall material, 1.5 to 5% of emulsifier, 1 to 5% of dispersant, 2.5 to 8% of solvent, 0 to 0.3% of thickening agent, and the balance being water. Pretilachlor isthe effective component, isocyanate and matched dispersant and emulsifier are taken as the auxiliary materials; and the prepared high quality pretilachlor microcapsule suspension has the advantages of high encapsulation rate, high dispersibility, and high suspension rate, has a long-lasting and stable effect on killing weeds in rice fields such as barnyard grass, is safe for the paddy rice, can effectively protect crops, and kills multiple weeds in fields such as barnyard grass.

The invention discloses a method for producing environment-friendly rubber oil through blending method. The method provided by the invention comprises the following steps that firstly extracting decompressed residual oil with solvent to obtain deasphalted oil, wherein the solvent for extraction is propane, the ratio by volume of the solvent and the decompressed residual oil is (6-8):1, and the extraction conditions are that the temperature of a tower top is 60-95 DEG C, the temperature of a tower bottom is 50-80 DEG C, and the pressure is 2.8-7.0 MPa, secondly mixing deasphalted oil obtained in the first step with naphthenic oil for 30-120 min with 70-90 DEG C to obtain environment-friendly rubber oil, wherein the mass ratio of the deasphalted oil and the naphthenic oil is (0.2-0.6):(0.8-0.4). The environment-friendly rubber oil produced by the invention accords with the environment-friendly instruction requirement of EU 2005/69/EC, wherein aromatic-carbon rate is 12%-18%, the content of PCA is smaller than 3%, the content of aromatic hydrocarbons is high, and the rubber oil is environment-friendly, nontoxic, and has no carcinogenic effect. The environment-friendly rubber oil can be used as succedaneum of existing aromatic oil, and has great economic values.