65results about How to "Increased mesopore volume" patented technology

The invention relates to a method for preparing a ZSM (Zeolite Socony Mobil)-5 in a grade structure, and specifically relates to a method for preparing a grade porous ZMS-5 molecular sieve by acid-base coupling. The method comprises the following steps: mixing commercial ZSM-5 and alkali liquor in proportion, and heating and stirring to form a suspension; filtering the suspension; washing the filter cakes by water or acidic liquor; and finally, carrying out ion exchange by using acidic ammonium salt liquor; and then, roasting to obtain the grade porous ZMS-5 molecular sieve. The method provided by the invention aims to prepare the ZSM-molecular sieve rich in secondary mesopores. Firstly, part of aluminum silicon species in the ZSM-5 is removed in an environment-friendly alkali treatment manner to prepare the ZSM-5 molecular sieve with a secondary pore structure. Based on the secondary pore formed, undefined structures on the surface of the ZSM-5 and in the duct are dissolved out by way of acid washing or ion exchange. Meanwhile, the pore volume and the specific surface area of the secondary mesopore-enriching ZSM-5 molecular sieve are improved. Through the acid-base coupling treatment, the distribution state of aluminum outside the framework on the surface of the ZSM-5 is improved, so that the secondary mesopore-enriching ZSM-5 molecular sieve prepared by the method has a huge application potential in catalytic cracking and hydrocracking.

The invention discloses a method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof. The preparation method comprises the steps of pretreatment, nitrogen doping and activating treatment. The nitrogen content of the prepared material is 0.2-16%, the micropore volume is 0.1-0.8 cm3/g, the mesoporous volume is 0.5-3.4 cm3/g, the total specific area is 1000-3300 m2/g, the mesoporous rate is 50-95%, the pore size distribution is 1-5 nm, and the average pore size is 2 to 4 nm. The prepared material involves the fields of electrochemical energy storage, adsorption separation, catalyst carriers and drug carrier and the like and is particularly suitable for electrochemical energy storage. According to the method, green biomass is adopted as a carbon source and is wide in source, low in cost, simple in process, easy to control, environmentally friendly and suitable for large-scale production.

To present a carbon material which provides an electrical storage device not only ensuring a high energy density but also realizing a high output and an excellent low temperature performance.

A negative electrode active material for an electrical storage device employing an aprotic organic solvent electrolyte solution containing a lithium salt as an electrolytes characterized in that it is made of a carbon material having a specific surface area of from 0.01 to 50 m²/g and a total mesopore volume of from 0.005 to 1.0 cc/g, wherein volumes of mesopores having pore diameters of from 100 to 400 Å occupy at least 25% of the total mesopore volume.

The invention relates to a lignin-based hierarchical porous carbon material and a preparation method thereof. The preparation method includes: lignin pretreatment, preparation of a eutectic solvent, eutectic solvent thermal carbonization of lignin, preparation of a solvent thermal carbonization product, activation of the solvent thermal carbonization product, and preparation of the lignin-based hierarchical porous carbon material. The m method provided by the invention adopts the eutectic solvent to dissolve the lignin raw material, is simple in preparation, and is green and non-toxic. The lignin-based hierarchical porous carbon material provided by the invention has abundant macroporous-mesoporous-microporous structures, is uniform and reasonable in distribution, and has good adsorption performance, and can be applied to supercapacitor electrode materials, lithium ion battery negative electrode materials, adsorption materials and other fields.

A preparation method of NaY zeolite. The preparation process comprises the steps of: adding deionized water and an auxiliary agent of polydimethyldiallyl ammonium chloride into a raw material of kaolin; carrying out spray drying on a prepared mixing slurry to obtain kaolin spray microballoons; sintering; mixing the sintered microballoons with a guiding agent; carrying out hydrothermal crystallization; filtering, washing and drying to obtain an in situ crystallization product with a NaY zeolite content of 50-70%, wherein an addition of the polydimethyldiallyl ammonium chloride is 1-10wt% of kaolin.

The invention relates to mesoporous activated carbon and a preparation method thereof. The technical proposal of the invention comprises the following steps: firstly, high sulfate bituminous coal or high sulfur content petroleum fluid coke are taken as raw materials, KOH is taken as an activating agent, the mass ratio of alkali to coal or the mass ratio of alkali to coke is 1.0-5.0:1, the adjustment of a carbon microcrystalline structure is performed in nitrogen atmosphere at a temperature of between 250 and 400 DEG C, the adjustment time is between 0.5 and 5 hours, and then the preheating treatment is performed for 1 to 5 hours at a temperature of between 400 and 700 DEG C to obtain an amorphous carbon stock; then the prepared amorphous carbon stock is subjected to activating treatment for 0.5 to 5 hours at a temperature of between 800 and 950 DEG C; and carbide after the activating treatment is acid-cleaned, water-scrubbed and dried to obtain the mesoporous activated carbon. The method has the characteristics of simple process, higher yield and productivity, low preparation cost and so on. Mesopores of the mesoporous activated carbon have large specific surface area, the mesopore area exceeds 60 percent of the mesoporous activated carbon, and the mesopore volume is high.

The invention provides a preparation method and applications of modified ZSM-5 molecular sieve for high-elective preparation of propylene from methanol and dimethyl ether, and mainly solves the problem of bad stability, which is caused by low propylene selectivity and easy carbon deposition, of ZSM-5 molecular sieve in the high-selective preparation of propylene from methanol and dimethyl ether. The preparation method comprises following steps: burning ZSM-5 molecular sieve original powder with a silicon/aluminum ratio in the range of 20 to 1000 and an average particle size in the range of 60 to 5000 nanometers to remove the organic template agent, then exchanging for 3 to 10 hours at the temperature of 20 to 100 DEG C in an ammonium chloride solution or an ammonium nitrate solution with a concentration of 0.1 to 5.0 mol/L, processing the obtained ammonium molecular sieves with different concentration (0.1 to 5.0 mol/L) ammonium fluosilicate solutions at the temperature of 20 to 100 DEG C for 1 to 48 hours, then fully washing with deionized water, filtering, drying for 12 hours at the temperature of 30 to 150 DEG C, and finally burning for 3 to 10 hours at the temperature of 300 to 550 DEG C so as to obtain series modified HZSM-5 molecular sieves. The processing method of ZSM-5 molecular sieve is simple and easy to operate. The modified HZSM-5 molecular sieve catalyst has high propylene selectivity and stability in the selective preparation of propylene from methanol and dimethyl ether.

The invention provides a Fenton-like oxidation catalyst and application thereof. A preparation process of the Fenton-like oxidation catalyst comprises the following steps of modifying a microporous ZSM-5 molecular sieve by alkaline so as to prepare a porous ZSM-5 molecular sieve; loading Fe (iron) onto the porous ZSM-5 molecular sieve, so as to obtain the Fenton-like oxidation catalyst. The Fenton-like oxidation catalyst is used for treating the organic amine wastewater, the maximum removal rate of COD (chemical oxygen demand) in water can reach 97%, and the removal rate of ammonia nitrogen can reach 90%. Compared with the conventional organic amine wastewater treatment technique, the Fenton-like oxidation catalyst has the advantages that (1) by performing alkaline modifying, a mesoporousstructure is introduced into the microporous structure of the ZSM-5 molecular sieve, so as to solve the problems of difficulty in molecule diffusion, low catalytic degrading rate of macromolecules andthe like, and accelerate the catalytic reaction rate; (2) the cost is low, the catalyzing activity is high, and the stability is good; (3) the better COD and ammonia-nitrogen removal effect can be realized at the normal pressure and the temperature lower than 100 DEG C, the reaction system is mild, and the treatment effect is good.

The invention relates to a method of preparing a hierarchical porous carbon material as a supercapacitor electrode material. Firstly an RF/PAM interpenetrating polymer network is prepared, and then is mixed with an activating agent that is potassium hydroxide, the mixture is put into a tubular furnace and heated and reacted under inert gas protection, and a product is cooled to obtain the target product that is the hierarchical porous carbon material. Compared with the prior art, the method is novel and simple in process, and when the obtained hierarchical porous carbon material is adopted as a supercapacitor electrode material, and under a current intensity of 1 A g<-1>, the highest specific capacitance can reach 261 F g<-1>, the capacity retention ratio after 10000 times of cyclic charging and discharging is 90.8%, and the specific capacitance can still be 216 F g<-1> under a large current intensity of 20 A g<-1>, and therefore the hierarchical porous carbon material shows a high specific capacitance, excellent rate capacity, and good cycle stability.

The invention provides a preparation method of high-mesopore-amount Y type zeolite. The preparation method comprises: carrying out ammonium ion exchange treatment on Y type zeolite at a temperature of50-120 DEG C to obtain NH4Y zeolite; adding the NH4Y zeolite to a buffer solution with a concentration of 0.1-1 M, and beating to a slurry; slowly adding an ammonium fluorosilicate solution with a concentration of 0.01-1 M to the slurry in a dropwise manner, and stirring for 0.1-5 h at a temperature of 20-120 DEG C to obtain a crude product; directly carrying out alkali treatment on the crude product or carrying out alkali treatment after washing and drying, wherein the crude product is treated for 0.1-5 h at a temperature of 30-120 DEG C with an alkaline solution with a concentration of 0.01-3.0 M, and a mass ratio of the alkaline solution to the crude product is 1-50:1, preferably 5-40:1; and carrying out ammonium ion exchange on the obtained crude product at a temperature of 50-120 DEGC, calcining for 1-8 h at a temperature of 300-800 DEG C, washing, and drying to obtain the high-mesopore-amount Y type zeolite.

The invention discloses a slag based mesoporous material and a preparation method thereof; the slag based mesoporous material is prepared by putting raw material slag, sodium hydroxide water and pore increasing agent glucose into a mixing device for mixing, using a die for molding, curing, and burning; and taking the adding quantity of the slag mass as a basis, the adding quantity of the sodium hydroxide is 6% of the slag mass, the adding quantity of the pore increasing agent glucose is 3%-6% of the slag mass, and the ratio of water adding quantity to slag mass is 0.24-0.28. Compared with a sample free of the pore increasing agent, after addition of the pore increasing agent in an optimum adding amount, the mesopore volume of a sample is increased by 102.63%; slag can be completely used in one time, the slag based mesoporous material with high added value can be obtained, the whole process is simple, no slag treatment is needed, no three wastes is discharged, the slag based mesoporous material is green and environmentally-friendly, and controllable preparation of the slag based mesoporous material can be realized.

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 5-65% of natural minerals, 10-60% of an oxide binder, 24-75% of a first molecularsieve, and 0.1-15% of a phosphorus additive, the first molecular sieve is a molecular sieve with the pore size of less than 6.9 angstrom, and a Y type molecular sieve, or comprises more than two selected from molecular sieves with the pore size of less than 6.9 angstrom, and the amount of the mesoporous protonic acid of the catalyst accounts for 20-70% of the total acid amount. The preparation method comprises: forming a slurry containing the first molecular sieve, the natural minerals and the inorganic oxide binder, carrying out spray drying, treating with an alkali and a compound acid, and introducing the phosphorus additive. According to the present invention, the catalytic cracking catalyst has high propylene yield and high BTX yield in the catalytic cracking of petroleum hydrocarbons.

The invention relates to modified mordenite which has a mesopore increment of 0.170-0.200cm<3>g<-1> relative to the unmodified mordenite. The invention also relates to a preparation method of the modified mordenite, which comprises the steps of: a, treating mordenite with an acid solution; b, treating the mordenite subjected to acid treatment by using an alkaline solution; c, carrying out hydrogen ion exchange on the mordenite subjected to alkaline treatment; and d, carrying out steam treatment on the mordenite obtained in the step c. The invention further relates to a method for enabling benzene and phenylcarbinol to be subjected to a Friedel-Crafts acylation reaction. The method comprises the step of using the modified mordenite as a catalyst or catalyst component. According to the method provided by the invention, the modified mordenite with remarkable mesopore increment is obtained through jointly modifying the mordenite simply and mildly, and the modified mordenite can provide more reaction space for the Friedel-Crafts acylation reaction of the benzene and the phenylcarbinol, thus the conversion rate of the phenylcarbinol is increased.

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises: (a) 15-65% of natural minerals; (b) 10-60% of an oxide; and (c) 25-75% of a Y type molecular sieve and a mesopore-rich IMF-structure molecular sieve, wherein the total specific surface area of the mesopore-rich IMF-structure molecular sieve is more than 600 m<2>/g, the matrix areais greater than 200 m<2>/g, and the volume of the mesopores is greater than 0.26 ml/g. The preparation method comprises: carrying out mixing beating on the mesopore-rich IMF-structure molecular sieve, the Y type molecular sieve, the natural minerals and an inorganic oxide binder, and carrying out spray drying. According to the present invention, the catalytic cracking catalyst has the high low-carbon olefin yield in the propylene preparation through the catalytic cracking of petroleum hydrocarbons.

The invention discloses a method for preparing hierarchical pore Y zeolite through oxalic acid-ammonium hydroxide cotreatment. The method comprises the following steps of 1, acid treatment with an oxalic acid solution, wherein NaY zeolite is obtained to be evenly mixed with the H2C2O4 solution to obtain a mixture, and the mixture is put in an oil bath pan and stirred; the mixed liquid obtained after oil bath treatment is subjected to vacuum suction filtration until filter liquor is close to be neutral, a filter cake is put into a drying oven for overnight drying, and an oxalic acid treated sample is obtained; 2, alkaline treatment with a NH3 H2O solution, wherein the oxalic acid treated sample obtained in the step 1 is evenly mixed with the NH3 H2O solution to obtain a mixture, and the mixture is put into an oil bath pan and treated; the mixed liquid obtained after oil bath treatment is subjected to vacuum suction filtration until filter liquor is close to be neutral, a filter cake istaken out, put into a drying oven for drying and calcined by using a muffle furnace, and then the hierarchical pore Y zeolite is obtained. The hierarchical pore Y zeolite is prepared through the oxalic acid-ammonium hydroxide cotreatment, compared with NaY, the outer surface area of the hierarchical pore Y zeolite is increased by 3 times or above, and the mesoporous volume of the hierarchical poreY zeolite is increased by 4 times or above.

The invention discloses a method for removing refractory (biodegradable) organic matters in industrial wastewater, which comprises the following steps: adding a composite oxidant, a composite solublemetal salt and modified activated carbon with developed mesopores into wastewater, and regulating the pH value of the wastewater to be greater than or equal to 4; and synchronously carrying out in-situ oxidation adsorption treatment and activated carbon adsorption treatment on refractory organic matters in the industrial wastewater. According to the method, the removal efficiency of refractory organic matters in the wastewater is high; and the problem that the activated carbon is blocked by macromolecular organic matters is remarkably reduced, and the adsorption removal of the activated carbonon refractory organic matters is promoted; in-situ oxidation adsorption and activated carbon adsorption are mutually assisted; and the method has the advantages of mild process conditions, easy reaction control, low consumption of the oxidant and the active carbon, short reaction time, and saving of the occupied area of equipment.

The invention discloses a preparation method of a hollow ZSM-5 molecular sieve catalyst. The preparation method comprises the following steps of: (1) mixing a silicon source and a template agent; (2) crystallizing the mixture; (3) roasting the mixture; (4) mixing the solid powder with an aluminum source and an alkali source; and (5) roasting the obtained solid to obtain a hollow ZSM-5 molecular sieve. (6) loading metal on the hollow ZSM-5 molecular sieve; (7) roasting; and (8) reducing with hydrogen to obtain the hollow ZSM-5 molecular sieve catalyst. The invention also discloses application of the prepared hollow ZSM-5 molecular sieve catalyst in preparation of high-density aviation fuel by hydrogenation of polycyclic aromatic hydrocarbon.

The invention discloses a method for large-scale preparation of nitrogen and oxygen doped carbon microspheres. The method comprises the following steps of: stirring 2-8 parts of diallyl phthalate, 5-10 parts of acrylonitrile, 5-30 parts of a polymerizable monomer, 70-80 parts of a solvent and 0.2-1 part of azodiisobutyronitrile by weight under 70-80 DEG C for 3-5 hours, and carrying out centrifugal separation to obtain a solid powder product; heating the solid powder obtained in the step A to 800-900 DEG C at a certain speed under the protection of inert gas so as to obtain constant-temperature carbonization, and washing and drying the obtained black solid powder to obtain the nitrogen and oxygen doped carbon microspheres. The carbon microspheres are high in mesoporous content, high in specific area and favorable in capacitive performance, and can be used as a supercapacitor electrode material.

The invention discloses a synthesis method of an SAPO-34 molecular sieve with a large specific surface area. The synthesis method comprises the steps as follows: (1) an aluminum source and water are mixed and pulped, tetraethylammonium hydroxide is added, the mixture is stirred, and a solution A is formed; (2) phosphoric acid, acidic silica sol and water are mixed to form a solution B; (3) the solution A and the solution B are subjected to parallel mixing, a mixed solution formed through parallel mixing is stirred in real time, the pH of the system is adjusted to 5.5-7.5, stirring is performed, and gel is obtained; (4) the gel is dewatered and dried, and a precursor is obtained; (5) the precursor is ground, the ground precursor is placed at the upper part of a reaction kettle, water is putin the lower part of the reaction kettle, and crystallization is performed; and (6) filtration is performed, filter residues are dried and calcined, and the SAPO-34 molecular sieve is synthesized. The prepared SAPO-34 molecular sieve is formed by polymerization of crystal grains of 50-200 nm, has the larger specific surface area and higher mesoporous capacity, contributes to quick access of reaction substances into pores and can improve the catalytic activity.

The invention relates to the technical fields of synthetic resins and plastics, and specifically relates to a preparation method of a palladium carbon catalyst. The preparation method of the palladium carbon catalyst comprises the following steps: (1) pretreating; and (2) preparing the palladium carbon catalyst. After hydrogen peroxide is used for treating an active carbon carrier, the activity of the obtained palladium carbon catalyst is firstly increased and then reduced along the concentration of the hydrogen peroxide; the hydrogen peroxide pretreatment enables the mean pore size and the mesopore volume of the palladium carbon catalyst to be increased; the hydrogen peroxide treatment can introduce an oxygen element to the carrier surface; the hydrogen peroxide pretreatment has no influence to the phase of the palladium carbon catalyst; the hydrogen peroxide pretreatment can increase the effective load area of active carbon and introduces an oxidizing group to promote the dispersion of palladium in the carrier, and the catalytic activity is improved.

The invention relates to a preparation method a lithium ion battery, particularly relates to a conductive agent applicable to a lithium iron phosphate material and a preparation method of the conductive agent, and mainly solves the technical problems in the prior art that the utilization rate of an active material is low, the residual capacity of an electrode is great and the like caused by great inner resistance and not enough discharging depth of the lithium iron phosphate electrode. The method provided by the invention comprises the following steps: under a constant-temperature condition, slowly adding conductive carbon black into a dispersant and a salt solution; heating and agitating to form a rheological phase; putting the rheological phase into a high-temperature furnace and heating; in a heating process, introducing inert gas all the time and cooling the rheological phase to the room temperature along with a furnace; washing with a strong acid and filtering; drying in a vacuum box under a high-temperature condition to prepare the treated conductive carbon black; and mixing a carbon nano tube, the conductive carbon black and conductive graphite according to a mass ratio of (0.1-1) to (0.1-5) to (0.1-1) to prepare the conductive agent.

The invention discloses a TS-1 molecular sieve catalyst with a special structure, and an application thereof in photocatalytic water hydrogen production. The TS-1 molecular sieve with a hierarchical pore structure is adopted as a carrier to load a noble metal, and a photocatalytic hydrogen production reaction is enhanced in the presence of a sacrificial agent and quantum dots CdS. The TS-1 molecular sieve catalyst with the special structure has the characteristics of being wide in photoresponse range, capable of effectively separating photo-induced electrons from hole pairs, high in photocatalytic activity and good in photocatalytic hydrogen production effect in the field of photocatalytic water hydrogen production.