51results about How to "Strong anti-coking ability" patented technology

The present invention relates to catalyst for alkylating ethanol and ethyl benzene into p-diethylbenzene and its preparation process. The industrial catalyst for efficient synthesis of p-diethylbenzene is prepared with the H-ZSM-5 molecular sieve with Si / Al ratio of 50 as basic matter and through surface acidity and tunnel regulation with B, Mg and Co, and has ideal pore size distribution and in-tunnel acidity distribution and strong coking resisting capacity. The precursor of B is boric acid, that of Mg is magnesium nitrate and that of Co is cobalt nitrate. The mass ratio between B and H-ZSM-5 molecular sieve is 1-3 %, that between Mg and H-ZSM-5 molecular sieve is 0.1-1 % and that between Co and H-ZSM-5 molecular sieve is 1-3 %. Compared with available similar catalyst, the present invention has the features one simple preparation process, low cost, high selectivity and yield of p-diethylbenzene, etc.

Preparation of micro-size particle zeolite catalyst for aromatization and its application in complete fractional FCC gasoline hydrogenation-aromatization composite process are disclosed. The catalyst consists of: transition metal oxide and lanthanide metal oxide is 1.0wt% - 10.0wt%, micro-size particle zeolite of 20nm-800nm 50.0wt% - 90.0wt%, and balanced inorganic oxide binder. Its advantages include low total and L acidity, unblocked pore canal, good stability and strong anticoking ability, low antiknock index ((R+M) / 2) loss of gasoline product with reduced S and olefin contents of FCC gasoline.

The catalyst for co-producing N-methyl morpholine and morpholine with materials including diglycol, liquid ammonia and monomethyl amine consists of carrier of (delta + theta)Al2O3, MgO, CaO or BaO and supported active components of Ni and Cu. Specifically, the catalyst consists of carrier in 78 wt% and active components including Ni 12 wt% and Cu 10 wt%. The preparation process of the catalyst includes soaking cloverleaf formed gamma-Al2O3 in water solution of nitrate of Mg, Ca or Ba, drying and calcining to obtain the carrier, soaking the carrier in mixed solution of nitrate of Cu and Ni, drying, drying and calcining to obtain the catalyst.

The invention discloses a pyrolysis, carbonization and catalysis integrated method, and belongs to the field of biomass pyrolysis. The invention aims to solve the problems of high energy consumption,high cost and low energy utilization rate of an existing method. The pyrolysis, carbonization and catalysis integrated method comprises five processes of sealed feeding, uniform distribution, continuous pyrolysis, tar catalysis and flue gas recycling. Biomass is used as a raw material, feeding and uniform distribution of the processed raw material are realized under a sealed condition, a pyrolyticreaction is carried out, and a pyrolytic oil-gas mixture and biochar are obtained after two main processes of pyrolytic carbonization and carbon-gas separation in sequence; a pyrolysis oil-gas mixture is subjected to a tar catalytic process in a catalytic chamber integrated with a pyrolysis furnace, part of cured biochar is prepared into a new catalyst for being continuously used, and the processes are subjected to stepped heat supply by utilizing waste heat of reflux flue gas. The nickel-based biochar catalyst is high in activity, good in stability, low in preparation cost, environmentally friendly and efficient.

The invention discloses a composite oxide oxygen carrier and a preparation method and application thereof. The oxygen carrier is a composite metal oxide AxA'l-xBO3 with a perovskite structure, wherein A is rare earth metal lanthanum, A' is transition metallic potassium, B is transition metallic cobalt, and 0.7<x<1. The application of the oxygen carrier in chemical looping combustion technology is that the temperature of combustion in an air reactor is 450-850 DEG C, and the temperature of reduction in a fuel reactor is 450-850 DEG C. The preparation method of the oxygen carrier is that cobalt nitrate, lanthanum nitrate and potassium nitrate are used as a precursor, citric acid or ethylene glycol is used as a complexing agent, a solution is prepared and mixed and stirred evenly, then evaporation of water is conducted, the solution is converted into thick gel from transparent sol, finally drying and baking are conducted, and a sample after baking is the composite metal oxide with the perovskite structure. The oxygen carrier is high in oxygen carrying rate and catalytic activity, strong in carbon deposit resistance and good in stability.

The invention relates to a hydrocalumite derived cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, oxidation resistance, carbon deposition resistance, and high activity. The molar composition of the catalyst is (CaO)a(CoO)b(AlO1.5) c, wherein a is1.66-5.19, b is 0.34-0.81 and c is 1.0. The invention adopts coprecipitation method to prepare a catalyst precursor, and then roasting is carried out to obtain the Ca-Co-Al-O mesoporous composite oxide. The catalyst takes calcium oxide as the framework, contains cobalt-alumina spinel phase and a small amount of Ca12Al14O33, inhibits the acidity of the catalyst, improves the carbon deposition resistance and sintering resistance of the catalyst, and improves the activity of hydrogen production by autothermal reforming of acetic acid.

The invention provides a C2-C12 aliphatic carboxylic acid ketone activator. The invention uses gamma-aluminum oxide as carrier and the single, double elements, and ternary elements of lanthanum, cerium, praseodymium and neodymium of light lanthanide series rare earth as active components. While the activating carrier method comprises (1) the heat treatment process while the treatment temperature is 480-800 Deg. C; (2) azotic acid aqueous solution method while the concentration of azotic acid aqueous solution is 5-45%; (3) evacuation method. In addition, the activator is prepared via the immersion method while it can be used to C2-C12 aliphatic carboxylic acid ketone.

The present invention relates to a kind of catalyst that takes diethylene glycol, liquefied ammonia and monomethylamine as raw materials to co-produce N-methylmorpholine and morpholine, which is based on (δ+θ)Al2O3 and MgO, CaO and BaO Any one is a carrier, on which Ni and Cu are supported as two active components to form; in percent by weight, the catalyst is 100 parts, and the carrier is 78%, wherein (δ+θ) Al O375%, MgO, CaO or BaO is 3%; the active component is 22%, of which Ni is 12% and Cu is 10%. The preparation method of the catalyst is as follows: the clover-shaped γ-Al2O3 carrier is impregnated with magnesium, calcium or barium nitrate aqueous solution, dried and calcined to obtain the above carrier, and then impregnated with copper and nickel nitrate mixed solution, dried and calcined. The above catalyst was obtained.

The invention discloses a preparation method of spherical alumina. The preparation method of spherical alumina comprises the following steps: (1) mixing raw materials containing an aluminum source, anacid I solution and an acid II solution, and heating to obtain aluminum sol, wherein the acid II solution is an organic polybasic acid solution; and (2) adding polyethylene glycol and a gelatinizingagent into the aluminum sol to obtain a solution I, dropwise adding the solution I into an oil column to form gel beads, and aging, washing, drying and roasting the gel beads to obtain the spherical alumina. The spherical alumina prepared by the method has the characteristics of high strength, wear resistance and large pore diameter and pore volume, and a propane dehydrogenation catalyst preparedfrom the spherical alumina is strong in carbon deposition resistance, good in stability and high in propylene selectivity.

The invention discloses a modified Y-Beta composite molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps of under a stirring condition, adding a Y-Beta composite molecular sieve into a pressure container full of an organic base solution, sealing a system, pressurizing to 0.2 to 1.0MPa, then heating to 50 to 90 DEG C, treating for 0.5 to 3 hours at constant temperature, depressurizing, carrying out suction filtration, drying, and roasting to obtain the modified Y-Beta composite molecular sieve. The modified Y-Beta composite molecular sieve prepared through the method has mesopore pore size distribution with a larger size, can provide more reaction spaces for macromolecules, and is beneficial to improving a catalytic performance of the molecular sieve, simple in the preparation method, and applicable to industrial application.

A catalyst for pretreatment of inferior reforming raw materials, and a preparing method thereof are disclosed. The catalyst is composed of an active component, an auxiliary agent and a carrier, wherein the active component is composed of a Group VIB element and a Group VIII element; the auxiliary agent is phosphorus; the catalyst comprises, based on oxides, 10-30 wt% of the Group VIB element, and2-10 wt% of the Group VIII element; the weight ratio of the Group VIB element to the P is 0.05 to 0.20; and the weight ratio of the Group VIII element to the P is 0.8 to 2.0. The invention also discloses a pretreatment method for inferior reforming raw materials. The catalyst can remove the sulfur and nitrogen in the inferior reforming raw materials to 0.5 [mu]g / g or below in the pretreatment method, the ultra-deep hydrodesulfurization and denitrification of the inferior reforming raw materials are achieved, and oil formed after hydrogenation can meet material feeding requirements of a reformer.

The invention discloses a composite oxide oxygen carrier and a preparation method and application thereof. The oxygen carrier is a composite metal oxide AxA'l-xBO3 with a perovskite structure, wherein A is rare earth metal lanthanum, A' is transition metallic potassium, B is transition metallic cobalt, and 0.7<x<1. The application of the oxygen carrier in chemical looping combustion technology is that the temperature of combustion in an air reactor is 450-850 DEG C, and the temperature of reduction in a fuel reactor is 450-850 DEG C. The preparation method of the oxygen carrier is that cobalt nitrate, lanthanum nitrate and potassium nitrate are used as a precursor, citric acid or ethylene glycol is used as a complexing agent, a solution is prepared and mixed and stirred evenly, then evaporation of water is conducted, the solution is converted into thick gel from transparent sol, finally drying and baking are conducted, and a sample after baking is the composite metal oxide with the perovskite structure. The oxygen carrier is high in oxygen carrying rate and catalytic activity, strong in carbon deposit resistance and good in stability.

A catalyst for lightening the heavy arylhydrocarbon contains the metal in VIII family and composite carrier including ZSM-5 zeolite, mordenite and alumina. It can increase the transform rate of C9 aryhydrocarbon and output rate of xylene, and decrease the carbon deposit.

The invention discloses a modified Y type molecular sieve and a preparation method thereof. The molecular sieve has the following properties: the total pore volume is 0.76-1.25ml / g, wherein the mesoporous volume is 0.55-1.05ml / g and the mesoporous volume is 65-90% of the total pore volume; the mole ratio of silicon oxide to aluminum oxide is 10-35; and the specific surface area is 680-1050m<2> / g. The preparation method comprises the following steps: under a stirring condition, adding the Y type molecular sieve into a pressure container filled with organic aqueous alkali; closing the system; increasing the pressure to 0.2-1.0MPa, and then increasing temperature to 50-90 DEG C and treating for 0.5-3 hours under constant temperature; and relieving pressure, performing suction filtration, drying and roasting, thereby acquiring the modified Y type molecular sieve. The molecular sieve has larger-size mesoporous distribution and can supply much more reaction space for macromolecules; the catalytic performance of the molecular sieve is promoted; and the preparation method is simple and is suitable for industrial application.

The invention discloses a modified Y-Beta composite molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps of under a stirring condition, adding a Y-Beta composite molecular sieve into a pressure container full of an organic base solution, sealing a system, pressurizing to 0.2 to 1.0MPa, then heating to 50 to 90 DEG C, treating for 0.5 to 3 hours at constant temperature, depressurizing, carrying out suction filtration, drying, and roasting to obtain the modified Y-Beta composite molecular sieve. The modified Y-Beta composite molecular sieve prepared through the method has mesopore pore size distribution with a larger size, can provide more reaction spaces for macromolecules, and is beneficial to improving a catalytic performance of the molecular sieve, simple in the preparation method, and applicable to industrial application.

The invention relates to a hydrocalumite derived cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, oxidation resistance, carbon deposition resistance, and high activity. The molar composition of the catalyst is (CaO)a(CoO)b(AlO1.5) c, wherein a is1.66-5.19, b is 0.34-0.81 and c is 1.0. The invention adopts coprecipitation method to prepare a catalyst precursor, and then roasting is carried out to obtain the Ca-Co-Al-O mesoporous composite oxide. The catalyst takes calcium oxide as the framework, contains cobalt-alumina spinel phase and a small amount of Ca12Al14O33, inhibits the acidity of the catalyst, improves the carbon deposition resistance and sintering resistance of the catalyst, and improves the activity of hydrogen production by autothermal reforming of acetic acid.