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661results about How to "Lower synthesis cost" patented technology

Method for preparing hierarchical porous titanium silicalite TS-1

The invention discloses a method for preparing hierarchical porous titanium silicalite TS-1, which is characterized in that: carbon black is replaced by cheap sugar, and materials such as carbon nanotubes and the like are used as a mesoporous/macroporous template, so the synthesis cost of a molecular sieve is greatly reduced. In the process of preparing dry glue by performing heat treatment on sugar-containing TS-1 molecular sieve synthetic sol, the sugar is heated and part of sugar is carbonized and dehydrated to directly form a hard template, so that high-temperature carbonization under the protection of inert gas is avoided, the complicated process of separately preparing a carbon template and a carbon-silicon complex is saved, and the preparation process of a hierarchical porous zeolite molecular sieve is greatly simplified. The product prepared by the method has the advantages of regular shape and microporous channel of the conventional TS-1, mesopores of 4 to 50nm and macropores of more than 50nm which pass through zeolite, and mutually communicated hierarchical porous channels to overcome the limitation of inherent micropores of the zeolite on catalytic reaction, and can be used for olefin epoxidation, aromatic hydrocarbon hydroxylation, cyclohexanone ammoxidation, oxidation removal of different sizes of sulfides in liquid fuel, and the like.
Owner:DALIAN UNIV OF TECH

Method for synthesizing titanium-silicon molecular screen

A method of synthesizing titanium silicate molecular sieve is to hydrothermally crystallize the hydrolytic solution of silicon and titanium in a closed reaction vessel and then recycle the product. The method is characterized in that the hydrolytic solution of silicon and titanium is gotten by any one of the following three methods: A. under ultrasonic agitation, silicon source is first hydrolyzedin organo-alkali compound solution and then the titanium source is hydrolyzed in the solution; B. under the ultrasonic agitation, titanium source is first hydrolyzed in organo-alkali compound solution and then the silicon source is hydrolyzed in the solution; C. under the ultrasonic agitation, silicon source and titanium source are respectively hydrolyzed in organo-alkali compound solution and then mixed together. The synthetic method can eliminate partial uneven concentration, leads the amount of TiO2 generated by self agglomeration after the hydrolysis of titanium source to be as little as possible and reduces the production of extra framework titanium. Compared with the prior art, the TS-1 molecular sieve synthesized by the method not only has better catalytic oxidation activity and selectivity but also has better stability of catalytic activity.
Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of nano zero-valent iron loaded hydrophilic porous biochar composite material

The invention discloses a preparation method of a nano zero-valent iron loaded hydrophilic porous biochar composite material, relates to preparation methods of hydrophilic porous biochar composite materials, and aims to solve the problems that an existing matrix loading metal particles is high cost, and nano zero-valent iron is unstable and prone to agglomeration and is low in performance when being applied to heavy metal adsorption. The method includes the steps of firstly, subjecting biomass to pyrolysis and molten salt activation; secondly, preparing a hydrophilic porous biochar material; thirdly, loading the nano zero-valent iron to obtain the nano zero-valent iron loaded hydrophilic porous biochar composite material. The specific surface area of the prepared nano zero-valent iron loaded hydrophilic porous biochar composite material can reach 603.4m<2>*g<-1>. Due to the fact that corn straw is agricultural waste which is low in cost and wide in source, the cost of the preparation method is lowered by using the pyrolysis product of the corn straw as the matrix material. The prepared nano zero-valent iron loaded hydrophilic porous biochar composite material is applicable to the field of environmental pollution remediation.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY

Copper-based MOF carbonization derived catalytic material and preparation method and application thereof

The invention belongs to the technical field of heterogeneous catalysis and particularly discloses a copper-based MOF carbonization derived catalytic material and a preparation method and applicationthereof in the field of unsaturated hydrocarbon selective hydrogenation. The copper-based MOF carbonization derived catalytic material and the preparation method have the advantages that by controlling pyrolysis conditions and using organic ligands as the self-sacrificial template to reduce copper ions in an in-situ manner, the metal active center of the prepared catalytic material is highly dispersed, the specific surface area of the catalytic material is larger than that of a traditional supported catalyst, and the catalytic material has rich mesoporous and micropore structures and can provide a sufficient place for hydrogenation reaction; nanoscale, sub-nanometer even atomic-scale metal particles in the structure of the catalytic material have extremely high surface energy, so that theactivity and selectivity of the catalytic material are much better than those of common metal catalysts and even can be on a par with those of precious-metal catalysts; the catalytic material is suitable for activity the carbon-carbon double bonds or triple bonds of unsaturated hydrocarbon and can adsorb free hydrogen to perform selective hydrogenation reaction and the like; the catalytic materialis low in synthesizing cost and can provide a brand new thought for an existing catalytic hydrogenation process.
Owner:WUHAN UNIV OF TECH

Preparation method of low-cost ZSM-5 type zeolite molecular sieve, and application thereof

The invention discloses a preparation method of low-cost ZSM-5 type zeolite molecular sieve, and application of the low-cost ZSM-5 type zeolite molecular sieve, belonging to the field of a molecular sieve preparation technology. The method comprises the steps of a. drying pulverized fuel ash raw powder to constant weight, mixing HCl solution with the dried pulverized fuel ash, stirring, centrifuging, washing and drying for later use; b. grinding the pulverized fuel ash treated by the step a, mixing the ground pulverized fuel ash with NaOH for melting, cooling, grinding and screening by a molecular sieve; feeding the ground melt into deionized water, mixing, stirring under the condition of water bath, and carrying out centrifugal separation to obtain liquid supernatant; c. taking the liquid supernatant obtained in the step b, taking tetrapropylammonium hydroxide as a template agent and NH4F as a mineralizer, mixing and carrying out crystallization reaction; after that, taking out the product, quenching to the room temperature, washing, drying and roasting to obtain the zeolite molecular sieve. According to the method, the pulverized fuel ash discharged by a thermal power plant is fully utilized as a silicon-alumininm source and is used for replacing pure chemical reagents Si and Al for synthesizing the molecular sieve, so that the synthesis cost of the molecular sieve is lowered, and the utilization value is high.
Owner:HUAINAN NORMAL UNIV

MCM-22 zeolite molecular sieve containing rare earth heteroatoms in skeleton and preparation method thereof

The invention relates to an MCM-22 zeolite molecular sieve containing rare earth heteroatoms in a skeleton and a hydrothermal synthesis method thereof. The method is characterized by comprising the following steps: regulating the pH value of the mixed solution of a silicon source and a rear earth source to perform co-hydrolysis and obtain a silicone gel precursor containing rear earth; then adding an organic template agent to obtain a solution A; mixing water, an aluminum source and an alkali source uniformly according to a certain proportion to obtain a solution B; slowly adding the solution B in the solution A dropwise to obtain a crystallization liquid; and placing the crystallization liquid in a hydrothermal kettle, sealing and performing the static hydrothermal crystallation for 5-30 days at 140-180 DEG C to obtain the skeleton rare-earth heteroatom molecular sieve MCM-22 with the MCM-22 crystal structure. The method avoids the phenomenon that only rare-earth heteroatoms are hydrolyzed to generate oxide precipitate; the crystallization process uses the static method without the stirring step, thereby simplifying the operating condition and reducing the production difficulty. In addition, the product has high crystallization degree and high hydrothermal stability and the preparation method has good repeatability.
Owner:NANJING UNIV OF TECH

Compound alkali metal hydrate dissolvent synthesis method for metallic sulfide nano crystal material

InactiveCN101112974AFew controllable parametersLower synthesis costAlkali metal sulfides/polysulfidesSolventChemistry
The invention discloses a preparation method for a metal sulfide and a composite metal sulfide nano crystal material, which is suitable for the preparation of the nano crystal materials of cadmium sulfide, cuprous sulfide, zinc sulfide, lead sulfide, bismuth sulfide, and zinc-cadmium sulfide. The method is characterized in that water or organic solvent used in the existing hydrothermal or solvent thermal synthetic methods is replaced with melt composite alkali metal hydroxide which is synthesized through a chemical reaction under the normal atmosphere and a temperature between 100 and 300 DEG C. The raw materials used are soluble inorganic metal salts and sulfide or sulfide compounds, thereby having less controllable parameters and simple art, and being able to amplify manufacturing during the process of synthesis. Metal sulfide crystal produced has the advantages of good crystal, clean surface and even size, and is suitable for the research on the intrinsic properties and the maximum play of the functions of the nano crystal materials. The metal sulfide and the composite metal nano crystal materials have properties of a semiconductor, LED and optoelectronic, thereby being suitable for biomarker and preparation of a nano electronic apparatus, an LED apparatus and an optoelectronic apparatus.
Owner:CHONGQING UNIV

Method for preparing mordenite molecular sieve

The invention relates to a method for preparing a mordenite molecular sieve. The method comprises the following steps of: dissolving an aluminum source in a sodium hydroxide solution, adding silicon sources, stirring at room temperature by strong magnetic force, and dispersing for a period of time; mixing the silicon sources which are dispersed uniformly and an aluminum source solution to form glue, adding a zeolite molecular sieve containing a five-membered ring as a crystal seed, stirring and mixing uniformly by the strong magnetic force at room temperature, and transferring the mixture into a reaction crystallization kettle, and performing crystallization reaction at the temperature of between 150 and 170 DEG C for 0.5 to 3 days; and performing suction filtration, washing and drying conventionally to obtain the mordenite molecular sieve. According to the method, an expensive organic amine template agent is not used as a structure guiding agent, and the zeolite molecular sieve which is wide in using, low in cost and readily available and contains the five-membered ring is used as the crystal seed to synthesize the mordenite molecular sieve with a high silica-alumina ratio directly, so the prepared mordenite molecular sieve has the advantages of high crystallinity and purity, controllable granular sizes and appearance, high yield, convenience for industrial production and the like.
Owner:EAST CHINA NORMAL UNIVERSITY

Synthesis method for betaine-type amphoteric ion compound containing reactive group

The invention discloses a synthesis method for a betaine-type amphoteric ion compound containing a reactive group. The synthesis method comprises two synthesis methods, namely, a synthesis method for a betaine-type amphoteric ion compound containing carbon-carbon double bonds, and a synthesis method for a betaine-type amphoteric ion compound containing hydroxyl group, wherein the synthesis method for the betaine-type amphoteric ion compound containing carbon-carbon double bonds comprises the step of reacting tertiary amine containing carbon-carbon double bonds and having a molar ratio of 1: 0.2 to 1: 1.5 with a carboxylic acid compound or a sulfonic acid compound containing an alpha, beta-unsaturated ketone structure for 1-120 hours at 0-100 DEG C in a condition of the presence of a first solvent and a polymerization inhibitor; and the synthesis method for the betaine-type amphoteric ion compound containing hydroxyl group comprises the step of reacting tertiary amine containing hydroxyl group and having a molar ratio of 1:0.5 to 1:2 with a carboxylic acid compound or a sulfonic acid compound containing an alpha, beta-unsaturated ketone structure for 1-120 hours at 0-100 DEG C in a condition of the presence of a second solvent. The synthesis method is simple, moderate in conditions, few in side reactions, high in product purity, simple in purification process, and high in yield, thus being capable of reducing the synthesis cost for the product.
Owner:SOUTH CHINA UNIV OF TECH
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