102 results about "Combinatorial catalysis" patented technology

The invention relates to a catalyst for preparing acrylic acid from lactic acid dehydration and a reaction technology thereof. The catalyst comprises an inorganic porous material vector and an active metal component with 1wt% to 50wt% (calculated in the form of oxide), wherein, the inorganic porous material vector is one of silica-aluminum molecular sieve, phosphorous-aluminum molecular sieve, silica-phosphorous-aluminum molecular sieve and mesoporous material, and the active metal component is one of or a plurality of materials combined according to the random ratio such as IA, IIA, IIB, VIB, VIIB, VIIIB and rare earth elements. The catalyst is prepared in a way that the inorganic porous material vector is impregnated and loaded into the solution of soluble salt or hydroxide which contains active metal. The reaction of preparing acrylic acid from lactic acid dehydration is carried out in a fixed-bed flow-typed reactor which is filled with the catalyst; lactic acid which has 10-100% of concentration is directly put into the reactor to carry out catalytic dehydration at 280 DEG C to 400 DEG C without preheating gasification, so as to obtain 100% of lactic acid conversion rate and over 63% of acrylic acid selectivity.

The invention discloses a method for preparing organic carboxylic ester by combined catalysis of an aryl bidentate phosphine ligand. The method comprises the following steps: under the action of a palladium compound / aryl bidentate phosphine ligand / acidic additive combined catalyst, carrying out a hydrogen esterification reaction on terminal olefin, carbon monoxide and alcohol so as to generate theorganic carboxylic ester with one more carbon than olefin. According to the invention, by adoption of the palladium compound / aryl bidentate phosphine ligand / acidic additive combined catalyst, good catalytic activity and selectivity for the hydrogen esterification reaction of the olefin are achieved, and olefin carbonylation to synthesize organic carboxylic ester can be efficiently catalyzed. Thearyl bidentate phosphine ligand has a rigid skeleton structure of a rigid ligand and the flexibility of a flexible ligand, so the aryl bidentate phosphine ligand has proper flexibility due to the characteristic that the aryl bidentate phosphine ligand is soft and rigid, and a most favorable coordination mode and a stable active structure in space are favorably formed. In addition, the aryl bidentate phosphine ligand has the advantages of high stability, simple and convenient synthesis method and the like; and a novel industrial technology is provided for production of organic carboxylate compounds.

The invention relates to the technical field of preparation of carbazole compounds, in particular to a method for synthesizing carbazole compounds, which includes: obtaining a product by using 1, 2, 3, 4-tetrahydrocarbazole compound as raw materials by means of catalytic dehydrogenation, and leading cheap catalyst and high-activity catalyst to undergo combinatorial catalysis in the catalytic dehydrogenation process: the cheap and low-activity catalyst is used for catalysis at the first step, and then the high-activity catalyst is used for catalysis at the second step; or the high-activity catalyst is used for catalysis at the first step, and then the cheap and low-activity catalyst is used for catalysis at the second step. The method for synthesizing the carbazole compounds is small in catalyst use amount, low in cost and high in reacting conversion rate and selectivity, the content of carbazole is higher than 99%, solvent and the catalyst can be recovered and used indiscriminately, and the method is suitable for industrial production and has the advantages of simple process, high reacting yield, high product purity and environmental friendliness.

The invention relates to a preparation method and use method of a two-stage bed reaction catalyst used in the coal tar pitch hydrocracking lightening process. The use method of the catalyst comprises the following specific steps: the mixture of coal tar pitch and toluene is used as the raw material and a fixed bed reactor is adopted to perform the efficient combinatorial catalysis through the two-stage bed reaction catalyst under the conditions that the reaction temperature is 380-500 DEG C, the reaction pressure is 5.0-12.0MPa and the reaction air speed is 0.2-5h<-1>, thus realizing the lightening process of the hydrocracking two-stage reaction of coal tar pitch. The two-stage bed combined catalyst in the invention consists of two catalytic components with different functions at a ratio of (1:10)-(10:2). By using the method in the invention in the coal tar pitch hydrocracking lightening reaction process, the reaction activity is higher, the stability is better, the production technology can be effectively simplified, and the production energy consumption, the material consumption and the cost can be reduced.

A process for deactivation of an olefin oligomerization catalyst is described, including contacting a catalyst composition with a catalyst quenching medium to form a deactivated catalyst composition, and recovering excess catalyst quenching medium. The catalyst quenching medium includes an alcohol having at least 6 carbon atoms, an organic amine, an amino alcohol, or a combination comprising at least one of the foregoing. The catalyst quenching medium is present in a molar ratio of catalyst quenching medium to catalyst of at least 3:1. A process for the oligomerization of an olefin is also described, including feeding the olefin, a solvent, and a catalyst composition into a reactor, oligomerizing the olefin in the reactor to form a reaction product stream including linear alpha olefins, solvent, and the catalyst composition, and contacting the reaction product stream with a catalyst quenching medium.

The invention belongs to the technical field of chemistry and chemical engineering and particularly provides a combined catalyst used for preparing light olefins from synthetic gas and a use method thereof, and mainly solves the problem that a catalyst used for preparing light olefins from synthetic gas is low in selectivity in the prior art. In the catalyst, an ZnCr oxide catalyst is coupled witheight-membered ring, ten-membered ring and twelve-membered ring molecular sieve catalysts containing P and Al, wherein the ZnCr oxide catalyst has the molecular general formula of ZnCrXY<c>O<d>. The catalyst achieves direct production of olefins from the synthetic gas in one step, solves the problems well, can be used for preparing C2-C4 olefins high-effectively, continuously and stably, and can be used for industrial production of preparing light olefins from synthetic gas.

The invention relates to a combined catalyst and a method for producing C5 and C6, wherein the combined catalyst comprises a first catalyst and a second catalyst, the first catalyst contains a ten-membered ring molecular sieve M1, the second catalyst contains a twelve-membered ring molecular sieve M2, the first catalyst and the second catalyst respectively and independently contain active metal components Pt and Pd, the first catalyst and the second catalyst are respectively filled in different reactors, and the ten-membered ring molecular sieve M1 and / or the twelve-membered ring molecular sieve M2 has the following characteristics that a molar ratio of silicon oxide to aluminum oxide is 120-300, the catalyst contains a mesoporous structure, a closed hysteresis loop appears at a low-temperature nitrogen adsorption-desorption curve P / P0 of 0.4-0.99, and the initial position of the closed hysteresis loop is P / P0 of 0.4-0.7. According to the invention, with the application of the method to produce C5 and C6, the yield is high, and the octane numbers of the produced C5 and the produced C6 are high.

The invention relates to the technical field of Fischer-Tropsch synthesis product hydro-conversion, and relates to a hydroconversion composition and a Fischer-Tropsch synthesis wax hydroconversion method, and the hydroconversion composition comprises a hydrogenation pretreatment catalyst, a combined catalyst and a hydrofining catalyst. According to the invention, the Fischer-Tropsch synthetic waxfraction of a temperature of 280-660 DEG C is subjected to simple hydrogenation pretreatment, fractionation, hydroisomerization, hydrofining and fractionation processes, such that lubricating oil baseoil with a low pour point and a high viscosity index can be prepared with a high yield. The technical core of the method is a hydroisomerization process based on a combined AEL and ATO structure aluminophosphate molecular sieve catalyst, so that each component in a wide-distillation-range raw material can be highly selectively converted into an isomerization product, and the yield and the performance of the product are improved at the same time.

The invention provides a preparation method of trimethylaluminum, which comprises the following steps: in the presence of a catalyst and a solvent, reacting methyl aluminum dichloride or sesquimethylaluminum chloride or dimethylaluminum chloride with a system of metal M and chloromethane to generate trimethylaluminum and a chloride of metal M; wherein the catalyst is selected from metal or ions thereof which are arranged behind metal aluminum in an electrochemical sequence; the metal M is selected from alkali metals, alkaline earth metals, or combinations thereof. The catalyst can significantly increase the reaction rate, so that the reaction can be carried out under very simple experimental conditions such as near normal pressure, the reaction yield and the product purity are higher, no by-product metal aluminum or unreacted alkali metal or alkaline earth metal is contained in the product, and the product is more convenient to treat.

The invention relates to a combined catalyst and a method for producing lubricating oil base oil from hydrocracking tail oil, wherein the combined catalyst comprises a first catalyst and a second catalyst, the first catalyst contains a ten-membered ring molecular sieve M1, the second catalyst contains a ten-membered ring molecular sieve M2, the first catalyst and the second catalyst are respectively filled in different reactors, and the ten-membered ring molecular sieve M1 and / or the ten-membered ring molecular sieve M2 has the following characteristics that a molar ratio of silicon oxide to aluminum oxide is 120-300, the catalyst contains a mesoporous structure, a closed hysteresis loop appears at a low-temperature nitrogen adsorption-desorption curve P / P0 of 0.4-0.99, and the initial position of the closed hysteresis loop is P / P0 of 0.4-0.7. According to the invention, with the application of the combined catalyst to produce lubricating oil base oil from hydrocracking tail oil, the good pour point depressing effect can be obtained, and the lubricating oil base oil is high in yield and viscosity index.

The invention discloses a catalytic heating coupled methanol hydrogen production process, which belongs to the field of hydrogen production, and specifically relates to the technical field of methanol hydrogen production, in order to solve the problem that the existing methanol hydrogen production process requires external heating to start, additional equipment is required, and energy consumption is high. It covers a large area, including a catalytic oxidation reactor and a methanol hydrogen production system. In the catalytic oxidation reactor, methanol and air in the raw material are oxidized at a temperature above 10°C, and the catalyst layer is oxidized at normal temperature, and the catalytic oxidation reaction occurs. The generated heat provides thermal energy for the start-up of the methanol hydrogen production system. Under the condition of no heat source, the raw material methanol and air undergo a catalytic oxidation reaction in the catalytic oxidation reactor under the action of the combined catalyst layer, and the heat generated provides heat energy for the start-up of the methanol hydrogen production system, making the entire methanol hydrogen production process run at room temperature It starts from the bottom, does not require external heating to start, and does not require additional external heat source equipment. The equipment occupies a small area and consumes low energy.

The invention relates to a method for producing lubricating oil base oil from Fischer-Tropsch wax. The method comprises: injecting Fischer-Tropsch wax into a reaction device for hydrogenation, the catalyst loaded in the reaction device contains a combined catalyst, and the combined catalyst includes the first A catalyst and a second catalyst, the first catalyst contains ten-membered ring molecular sieve M1, and the second catalyst contains ten-membered ring molecular sieve M2; wherein, the ten-membered ring molecular sieve M1 and / or the ten-membered ring Molecular sieve M2 has the following characteristics: the silica / alumina molar ratio is 120-300; it contains a mesoporous structure and a closed hysteresis loop appears at the low-temperature nitrogen adsorption-desorption curve P / P0=0.4-0.99, and the closed hysteresis The starting position of the ring is at P / P0 = 0.4-0.7. By adopting the method of the invention to produce lubricating oil base oil with Fischer-Tropsch wax, better pour point depressing effect can be obtained, and the yield of lubricating oil base oil is high, and the viscosity index is high.

The invention relates to a method for producing a combined catalyst and solvent oil, the combined catalyst includes a first catalyst and a second catalyst, the first catalyst contains a ten-membered ring molecular sieve M1, and the second catalyst contains a twelve-membered ring Molecular sieve M2, the first catalyst and the second catalyst each independently contain active metal components Pt and W; the first catalyst also contains or does not contain twelve-membered ring molecular sieve M3; wherein, the ten-membered ring molecular sieve M1 One or more of the 12-membered ring molecular sieve M2 and the 12-membered ring molecular sieve M3 has the following characteristics: the silicon oxide / alumina molar ratio is 120-300; it contains a mesoporous structure and has a low-temperature nitrogen adsorption-desorption curve P A closed hysteresis loop appears at / P0=0.4-0.99, and the initial position of the closed hysteresis loop is at P / P0=0.4-0.7. By adopting the method of the invention to produce solvent oil, better isomerization effect can be obtained, and the yield is high.