84results about How to "Slow down inactivation" patented technology

The invention relates to an oxo-synthesis reaction method, particularly a method for preparing pentanal from mixed butylenes by a two-stage hydroformylation reaction. The method comprises the steps that after a first-stage hydroformylation is carried out with mixed butylenes containing 1-butylene and 2-butylene as raw materials, the reaction product containing catalyst in the discharged material is separated; the unreacted material is subjected to a second-stage hydroformylation reaction; catalyst in the two-stage products is separated and returned to two reaction vessels according to a certain proportion. The method solves the problem of reaction difference of two olefins, improves olefin utilization efficiency and reduces production cost; and is applied in a petrochemical field.

The invention discloses a hydrogenation and refining method of gasoline with poor quality, comprising the following steps: the base oil of gasoline contacts and reacts with hydrogenation protective agent at low temperature; after reaction effluent is mixed with circulation oil, the mixture sequentially contacts and reacts with hydrogenation desilication solvent and hyrorefining catalyst at high temperature; the reaction product is cooled and separated to obtain hydrogen-rich gas and refined gasoline fraction; and parts of refined gasoline fraction serves as circulation oil to return to the outlet of a first hydrogenation reaction area. The method can handle coker gasoline with high content of sulphur, nitrogen and olefin, and refined gasoline fraction can satisfy charging requirements of reforming pre-hydrogenation devices and steam cracking ethene preparing devices. The method of the invention can effectively slow coking speed of heating furnace tubes, greatly lowers pressure drop generation frequency of a main hydrogenation reactor, improves the operating severity of the main hydrogenation reactor and retards the deactivation speed of catalyst at the bottom of a refined reactor.

The invention discloses a method for preparing a hydrogenation catalyst. The catalyst contains auxiliary agents of silicon and zirconium, and carries at least one metal element of VIB family and at least one metal element of VIII family. The assistant silicon and the zirconium are added during gelling of aluminum oxide, so that the silicon and the zirconium are evenly dispersed on the surface of the aluminum oxide, and can give full play to the auxiliary agent. Simultaneously, the catalyst has proper acidic property, so the catalyst shows higher activities of hydrodenitrification and hydrodesulphurization, and has higher activity and stability.

The invention discloses a method for preparing aluminum oxide dry glue powder containing silicon and zirconium. The method comprises the following steps: after an solution containing an aluminum compound and precipitating agent are subjected to gel forming reaction, adding a compound solution containing zirconium into the mixture under the condition of controlling proper pH value and the like, adding a compound containing silicon into the mixture before, after or at the same time of adding the compound containing zirconium, and then washing, filtering and drying the mixture to obtain the dry glue containing the silicon and the zirconium. Through optimizing process and condition of adding the silicon and the zirconium as assistant into the aluminum oxide dry glue, the silicon and the zirconium are evenly dispersed on the surface of aluminum oxide, and can give full play of the assistant.

The invention discloses a method for producing L-ascorbyl palmitate through non-aqueous phase enzymatic synthesis. The method comprises the following steps of: (1) mixing L-ascorbic acid with palmitic acid in a non-aqueous medium, adding immobilized lipase for catalytic reaction for 20-50 hours; (2) filtering the reaction liquid obtained in the step (1) to remove the immobilized lipase and undissolved L-ascorbic acid and evaporating the obtained filtrate under reduced pressure to remove a solvent; and (3) dissolving the residue obtained in the step (2) with ethyl acetate, washing with deionized water, separating an ethyl acetate phase out, evaporating under reduced pressure to remove the solvent, dissolving the residue with toluene, recrystallizing, centrifuging, washing the obtained substance with normal hexane and drying the obtained undissolved substance in vacuum to obtain an L-ascorbyl palmitate product. The method relates to non-aqueous enzymatic synthesis, has the advantages of high catalytic efficiency, mild reaction condition, low pollution, simple process, readily-available raw materials, high yield and convenience for large-scale production, and is accordant with the practical situation of the food additive production industry in China.

An iso-butane dehydrogenation catalyst and a preparation method thereof relate to catalytic agents and preparation methods of the catalytic agents in chemical reactions. The catalyst comprises, by weight, 1-30% of vanadic oxide, 0.2-5% of alkali metal oxide, 0.1-10% of Ce containing rare earth elements or La oxide and 55-98.7% of nanometer Al2O3. The preparation method is first preparing an Al2O3 carrier, then mixing the carrier with vandic salt solution, alkali metal solution, the Ce containing the rare earth elements or La salt solution, and then stewing and filtering to obtain a catalyst sample, roasting the catalyst sample for a certain time at certain temperature, and finally preparing the iso-butane dehydrogenation catalyst. The prepared iso-butane dehydrogenation catalyst improves conversion rate of iso-butane and achieves high olefin selectivity on the bases of the vanadic system catalyst at present.

The invention relates to a catalyst for isobutane dehydrogenation production of isobutylene. The catalyst solves the problem that the dehydrogenation catalyst prepared by the prior art has low activity and poor stability. The catalyst provided by the invention comprises, by weight, a) 0.1 to 5 parts of Pt or an oxide thereof, b) 0.1 to 5 parts of an alkaline earth metal or an oxide thereof, c) 0.1 to 5 parts of Sn or an oxide thereof, d) 0.1 to 5 parts of an alkali metal or an oxide thereof, e) 0.1 to 10 parts of AB2O4 having a spinel structure, wherein A represents at least one divalent metal cation and B represents at least one trivalent metal cation, and f) 80 to 99 parts of a carrier Al2O3. The catalyst well solves the problem and can be used for isobutane dehydrogenation industrial production of isobutylene.

The invention relates to a residual oil hydrotreating-catalytic cracking-solvent refining combined process. Residual oil and hydrogen enter a residual oil hydrotreater to perform hydrogenation reaction, hydrogenated residual oil enters a catalytic cracking unit to continue to react, catalytic cracking heavy cycle oil obtained through the reaction and slurry oil are subjected to solvent refining, solvent refining extract oil returns to the residual oil hydrotreater after solid impurities are removed, then the solvent refining extract oil and the residual oil enter the device together to be subjected to hydrotreating, residual refining extract oil returns to the catalytic cracking unit, and then the residual refining extract oil and the hydrogenated residual oil enter the catalytic cracking unit to continue to react. By means of the method, residual oil is converted into light oil products with high added value as far as possible, and the operating condition of the residual oil hydrotreater is improved.

The invention relates to a method for hydro-upgrading coal tar containing heavy distillate. The method comprises the following steps: adding visbreaking hydrocarbon which mainly comprises hydrocarbons with a boiling range of between 250 and 550 DEG C into a preposed catalyst bed which is filled with hydrogenation demetallization agent, wherein the visbreaking hydrocarbon can be hydrocarbons obtained through separating effluent of a coal tar hydrogenation upgrading reaction. The coal tar raw material and other hot feeds of the preposed catalyst bed are directly mixed and enter the preposed catalyst bed so as to reduce high temperature section time before contacting the catalyst. The method can reduce pressure drop of the preposed catalyst bed, slow down coking, prolong operation period, and is particularly applicable to hydro-upgrading of coal tar containing high-viscosity heavy distillate.

The invention provides aluminum oxide as well as a preparation method and application thereof. The method comprises the following steps: 1) mixing polyhydric alcohol, an aluminum source and an initiator I, and reacting to obtain a polyhydric alcohol aluminum solution, 2) mixing polyol, the polyol aluminum solution and water to react, removing water, aging in alcohol, and carrying out solid-liquidseparation to obtain pseudo-boehmite containing polyol, and 3) mixing the pseudo-boehmite containing the polyhydric alcohol with an initiator II, a polymer monomer and water, heating to react, carrying out solid-liquid separation, and roasting the obtained solid to obtain the aluminum oxide. The preparation method provided by the invention is simple in process, low in production cost and easy to operate, and the prepared aluminum oxide has larger pore volume and pore diameter by adopting polyol.

The invention discloses a hydrogenation catalyst composition and a preparation method thereof. The hydrogenation catalyst composition comprises an aluminum oxide carrier, an active metal and an auxiliary agent, wherein the active metal is selected from one or more of VIII family and/or VIB family metallic elements, and the auxiliary agent is selected from one or two of silicon or zirconium; the concentration of silicon and/or zirconium in the catalyst, in the form of oxides, are gradually increased from centers to outer surfaces of catalyst particles, wherein the concentration of silicon and/or zirconium at a position of 1/3R of particles is 0.1-0.5wt%, the concentration of silicon and/or zirconium at a position of 2/3R is 0.5-1.0wt%, the concentration of silicon and/or zirconium at a position of R is 1.0-3.0wt%, and R is the semi-diameter of the catalyst particles by taking the center of the catalyst as an initial point. The catalyst prepared by adopting an impinging stream co-precipitation gel forming mode in the invention is centralized in particle size distribution, and has an ideal pore structure, and the auxiliary agent and the active metal are distributed in the catalyst in a gradient increase mode, so that the deactivation rate of the catalyst can be effectively reduced, and the desulfurization and denitrification capacities of the catalyst are improved.

The invention provides a preparation method and application of a catalyst for solid acid catalysis of C4 alkylation. In the preparation process of ZSM-5 molecular sieves with multi-stage pores, a certain amount of heteropoly acid compound (HPA) and metal components such as Pt and Fe are introduced in situ to make the heteropoly acid compound and the Pt and Fe nanoparticles grow in situ at the porechannel surfaces of the ZSM-5 molecular sieves with the multi-stage pores. According to the method and application provided by the invention, the catalyst (Pt-Fe-HPA/ZSM-5) provided by the inventionis used, a mixture of isobutane and butene is used as a reaction raw material, and under the conditions of the alkane-alkene ratio of 50, the mass space velocity of 4.5 h<-1>, the pressure of 2.5-6.0MPa and the reaction temperature of 80-150 DEG C, high-selectivity conversion of the isobutane and the butene into target product trimethylpentane can be realized; the preparation method is easy to enlarge; and the catalyst can be applied to the field of acid catalysis of the C4 alkylation, and has better industrial application prospects.

The invention relates to a catalyst applied to dehydrogenation of light alkane and a preparation method thereof. The catalyst is prepared from the following components in parts by weight: 1-30 parts of Cu element or oxides thereof, 0.1-5 parts of alkali metal oxides or alkaline earth metal oxides, 0.001-1 part of group VIII elements in the periodic table of elements or oxides thereof, 0.001-1 part of group IIIA elements in the periodic table of elements or oxides thereof, and 54-99 parts of Al2O3 or SiO2. Compared with the prior art, the catalyst has a higher alkane conversion rate which can be up to 60% at low reaction temperature, and high higher olefin selectivity, which is more than 90%, and achieves better technical effect.

The invention discloses a method for processing inferior heavy oil into lubricant base oil with a high viscosity index. The problem that inferior heavy oil with high metal content and high carbon residue content cannot serve as hydrogenation feed of a fixed bed is mainly solved. The method can be realized based on the existing production process of general refinery. The method disclosed by the invention comprises the following steps: performing selective solvent deasphalting and hydrotreatment on inferior heavy distillate or residual oil with high sulfur/nitrogen content, high metal content, asphaltene content or high carbon residue value, thereby obtaining a series of high-quality lubricant base oil products. The method disclosed by the invention has the effects of improving the liquid component yield, improving the product quality and reducing emission of environmental pollutants.

The invention discloses a hydrogenation catalyst composition and its preparation method. The hydrogenation catalyst composition comprises an alumina carrier, active metal and an auxiliary agent, wherein the active metal is one or more metals selected from VIII group and/or VIB group metallic elements; and the auxiliary agent is one or two elements selected from silicon or zirconium. Concentration of silicon or zirconium in the catalyst is metered according to oxide and gradually decreases from the catalyst granule center to the external surface. Content of silicon and/or zirconium at R of granules is 1.0-3.0 wt%; content of silicon and/or zirconium at 1/3 of R is 0.5-1.0 wt%, and content of silicon and/or zirconium at 2/3 of R is 0.1-0.5 wt%, wherein R is radius of catalyst granules with the catalyst center as the starting point. The catalyst prepared by an impinging stream co-precipitation gelling mode has the following advantages: particle size distribution is centralized; the catalyst has an ideal pore structure; contents of the auxiliary agent and the active metal in the catalyst are reduced gradiently; inactivation rate of the catalyst can be effectively reduced; and metal-removal and metal-holding capabilities of the catalyst are enhanced.

The invention provides a tar cracking device and method. The device comprises a cracker, radiant tubes, catalysts, catalyst feeding openings, catalyst discharging openings and catalyst activation pipelines, wherein the cracker is partitioned into thermal cracking chambers and catalytic cracking chambers by partition plates, and the partition plates are provided with through holes; the radiant tubes are arranged in the thermal cracking chambers; the catalysts are arranged in the catalytic cracking chambers; the catalyst feeding openings are formed in the tops of the catalytic cracking chambers; the catalyst discharging openings are formed in the bottoms of the catalytic cracking chambers; the catalyst activated pipelines are connected with the catalyst feeding openings and the catalyst discharging openings respectively. By means of the tar cracking device and method, tar cracking efficiency of the device is improved.

The invention discloses a method for preparing 1,1,1,2,3-pentafluoropropane by using 1,1,1,2,3-pentafluoropropene. The method relates to the following steps that (1) inert fillers and hydrogenation catalysts with different proportions are separately filled into a reactor from bottom to top, the raw material stream flow flows from bottom to top, the proportion of the inert fillers and the hydrogenation catalysts is kept to be gradually reduced along the direction of the material flow, and a heat-exchange fixed-bed reactor is filled in the way; (2) 1,1,1,2,3-pentafluoropropene is mixed and preheated with hydrogen gas, and the obtained mixture enters the heat-exchange fixed-bed reactor from the lower end of the heat-exchange type fixed-bed reactor, and a gas-phase catalytic hydrogenation reaction is performed at a temperature of 50-250 DEG C, and the generated 1,1,1,2,3-pentafluoropropane is discharged from the upper end of the heat-exchange fixed-bed reactor; and (3) heat exchange is performed on the heat generated by the reactor by using a cooling medium. The method has the advantages that the hydrogenation reaction speed and the temperature rise of the catalyst bed layer are bettercontrolled, the deactivation speed of the catalysts is slowed down, and the operation period of the catalysts is prolonged.

The invention provides a light energy blood product preservation device, and relates to the technical field of medical devices. The device comprises a shell temperature adjusting component and a lightemitting component, wherein the temperature adjusting component and the light emitting component are arranged in the shell; the shell is of a structure with a cavity inside and is used for storing anexisting light-transmitting blood bag; the light-emitting component is arranged on the inner wall of the shell, and weak light emitted by the light-emitting component irradiates the light-permeable blood bag stored in the shell. Components in blood can be correspondingly activated to a certain extent or certain quantity, properties and state changes can be obtained according to the biological stimulation effect of the weak light, so that a blood product in the shell can be actively maintained to a certain extent, the activity of the blood components is improved, and the activity of the bloodcomponents can be maintained to a certain extent within a relatively long time period; in other words, the blood has high quality within a long period of time, and even the number, properties and functions of blood components in preservation can be changed and improved according to clinical expectations and requirements.