80results about How to "Good for long-term operation" patented technology

The invention discloses a mixed hydrogenation method for catalytic cracking gasoline and coking diesel oil. The method comprises: subjecting FCC (fluid catalytic cracking) gasoline to alkali-free deodorization, making the deodorized catalytic gasoline enter a prefractionator to be fractionated into light gasoline and heavy gasoline; mixing the heavy gasoline with coking diesel oil, then performing hydrodesulfurization, separating the desulfurization product to obtain hydrogenated heavy gasoline and treated coking diesel oil, and blending the hydrogenated heavy gasoline with the light gasoline to obtain a clean gasoline product. According to the method provided in the invention, when the coking diesel oil and the heavy gasoline are mixed for hydrogenation, the nitride brought in by the coking diesel oil undergoes competitive adsorption at a catalyst hydrogenation center and causes poisoning of the hydrogenation center, thus reducing olefin hydrogenation selectivity and decreasing the octane number loss of hydrogenation. On the other hand, when the mixed feed flows through a heat exchanger and heating furnace, the raw materials are in a gas-liquid mixed phase in the heating furnace and the heat exchanger, so that a coke material can be dissolved and taken away, coking can be avoided in the heat exchanger and the heating furnace, and the operation cycle of the equipment can be prolonged.

The invention discloses a natural gas recovery process. The light hydrocarbon recovery rate can be improved, and energy consumption can be reduced by the natural gas recovery process. The process comprises the following steps of separating and filtering the material gas by a separator and a filter orderly, entering into a compressor to compress, air cooling, and then separating a part of water and heavy hydrocarbon through the separator; deeply dewatering through a dehydration unit until the moisture is smaller than 10ppm; filtering, pre-cooling to -10 DEG C through a heat exchanger, cooling to -35 DEG C by a refrigerator, then cooling and separating, and reheating the separated mixed hydrocarbon to normal temperature through the heat exchanger and then conveying to a mixed hydrocarbon storage tank; returning the separated gas to the heat exchanger to exchange heat; reheating the gas to the normal temperature, and then entering a CNG (compressed natural gas) to compress and store. By adopting the process, the material gas with low air pressure and unstable storage quantity can be collected; and the natural gas recovery process is high in recovery rate, low in recovery cost, simple in recovery equipment, simple and convenient to operate, and low in energy consumption.

The invention discloses a catalyst for preparing ethylbenzene by reacting ethylene with benzene. The catalyst comprises a modified ZSM-5 molecular sieve, a modified ultrastable Y-type molecular sieve and an inorganic oxide, wherein the modified ZSM-5 molecular sieve consists of a ZSM-5 molecular sieve and 0.1wt%-10wt% of rare earth metal oxide which is supported on the ZSM-5 molecular sieve; a mole ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 30-500; the modified ultrastable Y-type molecular sieve consists of an ultrastable Y-type molecular sieve, 0.1wt%-6wt% of alkaline earth metal oxide and 0.1wt%-10wt% of rare earth metal oxide; a mole ratio of SiO2 to Al2O3 in the ultrastable Y-type molecular sieve is 4-15; the alkaline earth metal oxide and the rare earth metal oxide are supported on the ultrastable Y-type molecular sieve; the inorganic oxide is one or a mixture of more than two of aluminium oxide, zinc oxide and silicon oxide; a weight ratio of the modified ZSM-5 molecular sieve to the modified ultrastable Y-type molecular sieve and the inorganic oxide is (35%-85%):(5%-40%):(10%-55%).

The invention relates to an anti-coking gas-solid separation method and equipment and belongs to the technical field of petrochemical engineering and fluidization. The method and the equipment are used for solving the problems of reaction that settlers undergo coking and excessive thermal cracking. The method comprises the processes of rapid gas-solid separation, second-stage separation, second-stage dipleg flutter valve discharge and oil vapor lead-out and is characterized by adopting closed rapid cyclone separation, arranging catalyst diversion facilities, enabling the catalyst diversion facilities to be connected with the closed rapid cyclone separation and the second-stage separation, so as to form a closed separation system, and closely guiding a catalyst, oil vapor and anti-coking steam, which are discharged from second-stage dipleg flutter valves, into the closed separation system. According to the method disclosed by the invention, only steam exists in a settler without oil vapor and a catalyst, so that cleanup is realized, the problem of coking of the settler is thoroughly solved, the reaction of excessive thermal cracking of the oil vapor is reduced, the yield of dry gas is lowered, and the yield of products is increased. The invention further provides a closed rapid cyclone separator and catalyst diversion equipment, which are used for implementing the method disclosed by the invention. The method and the equipment are applied to devices for catalytic cracking, catalytic pyrolysis and the like of heavy oil.

The invention discloses a combined process of hydrotreating and catalytic cracking for inferior oil products. The process comprises the following contents: raw oil and a hydrogen gas are mixed, the mixed material enters a hydrotreating reaction zone, and the obtained effluent of a hydrogenation reaction is subjected to gas-liquid separation, so that hot low-separation oil and cold low-separation oil are obtained; the obtained hot low-separation oil and cold low-separation oil are directly enter a fractionation tower through different material inlets for separation, so that a light catalytic cracking raw material and a heavy catalytic cracking raw material are obtained; a part of the obtained heavy catalytic cracking raw material and a hydrogen gas are mixed, the mixed material enters a hydrogenation residual-carbon removing reaction zone, the reaction product enters a separation unit, and the reaction product and the reaction effluent of the hydrotreating reaction zone are subjected toseparation; and the obtained light catalytic cracking raw material and the rest of the heavy catalytic cracking raw material individually enter a catalytic cracking device or enter the catalytic cracking device after mixing for a catalytic cracking reaction, and the reaction product enters a catalytic cracking product separation system. The combined process provided by the invention can produce amaximum amount of high-value-added products, and can greatly reduce the overall energy consumption of a hydrogenation device.

The present invention relates to an ethylene oligomerization catalyst and a preparation method and application thereof, the structure of the catalyst is shown in the specification, or R1 is selected from-CH2-,-(CH2) 2-,-(CH2) 3-,-(CH2) 4-,-C (CH3) 2-,-C (CH3) 2CH2-, a cyclohexyl linking group or a phenyl linking group, and R2 and R3 are respectively selected from chlorine or methyl. The preparation method of the catalyst comprises the following steps: (1) grafting a ligand on silica gel; and (2) loading an active component Cr. The catalyst disclosed by the invention and an aluminum alkyl cocatalyst form an ethylene oligomerization catalyst system; the catalyst can catalyze an ethylene oligomerization reaction with high activity, the catalytic activity of the carrier catalyst can reach 4.99* 10 < 6 > g product/(mol.Cr.h), the selectivity of 1-hexene and 1-octene with high added values is high, and the catalyst is easy to separate from the product.

The invention relates to a vehicle-mounted mobile volatile organic compound waste gas treatment device, system and method. Residual volatile organic compound waste gas in a container is introduced into a membrane separation component to carry out enrichment concentration treatment; volatile organic compound waste gas at an enrichment side of the membrane separation component is introduced into a heat exchange component by a vacuum pump to carry out primary heat exchange with circulating water by a first heat exchanger, and after primary heat exchange, enters a second heat exchanger to carry out secondary heat exchange with compressed air at a cold end outlet of a vortex tube of a vortex component; after heat exchange, condensate enters a condensate recovery tank of a condensate recovery component to be recovered, and noncondensable gas is returned to the membrane separation component by a first fan; low-concentration volatile organic compound gas at a raffinate side of the membrane separation component is introduced into an adsorption component to be adsorbed by an adsorption tank, and after adsorption, purified gas is discharged into the atmosphere via a second fan at an outlet ofthe adsorption tank. According to the vehicle-mounted mobile volatile organic compound waste gas treatment device, system and method, treatment on the residual volatile organic compound waste gas inopen container equipment can be completed, product waste and atmosphere pollution are reduced, and flexibility is high.

The invention discloses a sealed type water-lubricating bearing system. The sealed type water-lubricating bearing system comprises a shaft sleeve assembly and water sealing bearings which support a tail shaft, wherein the inner peripheries of the water sealing bearings and the outer periphery of the tail shaft are in water lubrication; the front sealing assembly is used for sealing one group of water sealing bearings at one end close to a shaft coupler, and is used for preventing circulating fresh water from leaking towards the shaft coupler; a rear sealing assembly is used for sealing anothergroup of water sealing bearings, close to one end of a propeller, and is used for preventing circulating fresh water from leaking towards the propeller, and preventing seawater from passing through the rear sealing assembly; and the closed type water-lubricating bearing system is further provided with a water supply system for forming flowing fresh water circulation between the shaft sleeve assembly and the water sealing bearings, and cooling the front sealing assembly and the rear sealing assembly. The closed type water-lubricating bearing system provided by the invention is more perfect inintegral function, can provide good sealing requirements and cooling performances during operation, and facilities better maintenance and operation by judging a flowing condition of fresh water through a control system.

The invention discloses a method for producing clean low freezing point diesel oil by treating high nitrogen diesel oil. The method comprises: after mixing a diesel oil raw material with hydrogen, sequentially feeding the mixture through at least two serial hydrogenation reaction regions, wherein each of the hydrogenation reaction regions according a material flowing direction sequentially comprises a hydrogenation refining catalyst bed layer and a compound catalyst bed layer mixed and filled with a hydrodewaxing catalyst and a hydrogenation modified isomerization-visbreaking catalyst; and separating and fractionating a reaction effluent obtained in the last hydrogenation reaction region to obtain the low freezing point diesel oil. According to the method disclosed by the invention, temperature rise in a modified depressing process and temperature drop in a hydrodewaxing process are reasonably utilized,so that the yield and cetane number of the diesel oil are improved while the low freezing point diesel oil is produced, and therefore, the hot-spot temperature is reduced and the operating period is prolonged. In addition, the consumption of cold hydrogen or the gas loss of a heating furance is reduced, and the operating cost is further lowered.

The invention discloses a regular carrier catalyst with a desulfurization effect as well as preparation and application thereof. The regular carrier catalyst comprises a regular carrier and an activecoating attached to the surface of the regular carrier, wherein the active coating comprises a matrix containing IIA and IIB group metal oxides and a modified metal film attached to the outer surfaceof the matrix, the modified metal film comprises a modified metal, and the modified metal comprises one or more of Cr, Mo and W. The preparation method comprises the following steps: forming a mixturefrom metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; after the ultrasonic treatment, separating the mixed solution to obtain suspension; contacting the suspension with matrix particles, carrying out freeze drying to obtain matrix particles containing a modified metal film, andcoating the regular carrier with the matrix particles containing the modified metal film to obtain the regular carrier catalyst. The catalyst is used for hydrocarbon hydro-desulfurization, has high desulfurization activity and good stability, and can reduce the octane number loss of gasoline.

The invention discloses a modified molecular sieve for hydro-desulfurization as well as preparation and application thereof. The modified molecular sieve comprises a molecular sieve and a modifying metal film positioned on the outer surface of molecular sieve particles, wherein the modifying metal film contains one or more first modifying metals selected from Fe, Co, Ni and Mn and optional B. Thepreparation method of the modified molecular sieve comprises the following steps: forming a mixture from metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; separating the mixed solution after the ultrasonic treatment to obtain suspension, mixing the suspension with a molecular sieve, and carrying out freeze-drying to obtain the modified molecular sieve. The modified molecular weight is used for hydro-desulfurization of sulfur-containing hydrocarbons, has high activity and stability, can obviously reduce the olefin content, increase the iso-hydrocarbon content and increase the octane number of gasoline when used for gasoline desulfurization, and has a high gasoline yield.

The invention discloses a regular carrier catalyst with a desulfurization effect as well as preparation and application thereof. The regular carrier catalyst comprises a regular carrier and an activecoating attached to the outer surface of the regular carrier, the active coating comprises a IIA and IIB group metal oxide-containing matrix, a molecular sieve and a modified metal film, and the modified metal film comprises nickel and one or more rare earth metals selected from lanthanum, cerium, praseodymium and neodymium. The preparation method comprises the following steps: forming a mixture from metal powder, a hydroxyl-containing solvent and a surfactant, then treating the mixture under ultrasonic waves to obtain a mixed solution after the ultrasonic treatment; separating the mixed solution after the ultrasonic treatment to obtain suspension; contacting the suspension with matrix particles and/or molecular sieve particles or particles containing a matrix and a molecular sieve, carrying out freeze-drying, and then coating on a regular carrier. The catalyst can be used for hydro-desulfurization of hydrocarbon fuel, has the characteristics of high activity and good stability, is used for gasoline desulfurization, and can increase the octane number of gasoline.

The invention discloses a coarse stalk fuel gas purification process, which comprises the following steps of (1) pretreating the coarse stalk fuel gas; (2) introducing the gas treated in the step (1)into a lower section of a transverse pipe sub condenser to be washed for dust removal; removing carbon particle dust, wood tar and water in the coarse stalk fuel gas; (3) introducing the gas treated in the step (2) into an upper section of the transverse pipe sub condenser to be condensed; removing wood vinegar and rest water; (4) performing further condensation removal on the gas treated in the step (3) through a filter to obtain purified stalk fuel gas. The invention also provides a purification device of the process. The gas effective purification of coarse stalk fuel can be realized; byproducts such as the carbon powder the wood tar and the wood vinegar can be obtained; the requirements of energy saving, environment protection and safety can be sufficiently met.

The invention provides an improved preparation method of a dehydrogenation catalyst containing platinum, tin and aluminum, which is characterized by comprising the following steps of: uniformly stirring and mixing a pseudo-boehmite aqueous solution and a nitric acid aqueous solution according to a certain proportion, standing and layering the solution, and dipping, drying in the shade, drying and roasting a long-chain alkane catalyst by taking the supernate of the solution to obtain an anti-wear catalyst; according to the treatment method, the loss of noble metal elements on the outer layer of the catalyst is reduced, the original dehydrogenation performance of the catalyst is maintained and improved, and the olefin yield is ensured.