92 results about "Hexamethyleneimines" patented technology

The present invention relates to a method for synthesizing MCM-22 molecular sieve whose grain size can be effectively controlled by using hexamethylene imine (HMI) and piperidine (PI) as mixed template agent. Said method includes the following steps: uniformly mixing aluminium source, silicon source, alkali source, template agent and water to obtain a colloidal material, then making it undergo the processes of hydrothermal crystalizing, filtering, washing, drying and roasting so as to obtain the invented product.

A method for synthesizing MCM-22 molecular screen, which possesses MWW topological structure, employing silicon, aluminium, alkali, mould agent and deionized water as reacting raw material, blooming under the temperature of 135-185 Deg C for some time, hydrothermal synthesizing the needed molecular screen; the invention is characterized by using diamin liquid mixture (BA) as mould agent to prepare molecular screen, one (SDAI) is hexamethylene amine (HMI), another (SDA2) is any one of the followings: cyclohexylamine (CHA)or buta (BuA) or isopropyl amine (IPA).

The invention is a ZSM-5 molecular sieve synthesizing method, belonging to inorganic chemical synthesis technical field. And it prepares the ZSM-5 molecular sieve by preparing guiding agent and reacting mixed solution, hydrothermal crystallization, and routine filtering, washing, drying and baking, where the guiding agent uses tetrapropyl ammonium bromide or tetrapropyl ammonium hydroxide as the first organic alkali template and the reacting mixed solution uses annular molecular amine- hexamethylene imine or piperidine or their mixture as the second organic alkali template; and it has advantages of omitting ion exchange procedure, short process, low producing cost, not discharging ammonium- and nitrogen- containing waste water, not polluting environment, etc.

Disclosed is a method for synthesizing fine grain MCM22 molecular sieve, wherein the templating agent employs the product yield of hexanolactam hydrogenation, and mainly comprises hexamethyleneimine, water, a small amount of byproduct and hexanolactam (reacted unconcompletely), the method comprises using silicon source, aluminium source, alkali source, templating agent and deionized water as reaction raw material, crystallizing for a finite period of time at 135-185 deg. C, untill completion of the reaction, obtaiting the needed molecular screen through hydrothermal synthesis, the invention is characterized in that organic additives can be charged into the reaction raw material, the organic additive can be sodium dodecylbenzene sulfonate, polyethylene glycol type surface active agent, or their mixture, the molecule ratio of the charged additive and the silicon dioxide in the reaction raw material is 0.01-2.5.

The invention provides a method for preparing an MCM-49 molecular sieve containing rare earth. The molecular sieve comprises the following raw materials: an aluminum source, a base source, a silicon source, hexamethylene imine, cyclohexane, deionized water and salts of the rare earth, wherein the molar ratios of the raw materials comprise: SiO2:Al2O3 is 12-50, OH:SiO2 is 0.05-0.7, (HMI+CHA):SiO2 is 0.08-1.2, H2O:SiO2 is 10-70, and Re2O3:Al2O3 is 0.01- 0.5. The method comprises the following steps: putting the raw materials into a synthesizing kettle according to the ratios, and sealing the kettle; raising programming temperature to a crystallization temperature of between 135 and 180 DEG C; and then crystallizing and cooling the raw materials in self-generated pressure; and obtaining the MCM-49 molecular sieve containing the rare earth after a crystallized product is subjected to filtering, washing and drying. The method can improve the stability of a molecular sieve catalyst by introducing the rare earth into the molecular sieve in synthesizing, and obviously reduce the synthesizing cost by replacing partial or most of the hexamethylene imine by the cyclohexane in organic amine; meanwhile, the preparation method has the characteristics of good repeatability and high degree of crystallinity of the product.

The invention relates to a method for synthesizing a boron-containing molecular sieve, namely a method for synthesizing a B-ZSM-5 molecular sieve, which belongs to the technical field of inorganic chemical synthesis. The method is characterized in that cheap cyclic molecular amine and hexamethylene imine (HMI) or piperidine (PI) or a mixture thereof is taken as an organic alkali template agent, and a directing agent is prepared by the synthesis process of the directing agent; substances such as a silicon source, a boron source, a sodium source and the like are adopted; the mol mixture ratio of SiO2 in the silicon source to the organic alkali template agent to B2O3 in the boron source to Na2O in the sodium source to H2O is equal to 1: (0.5-2): (0.005-0.1): (0-0.15): (10-40), and a mixture solution is prepared; and then a certain amount of the directing agent is added into the solution, and then the boron-containing molecular sieve (B-ZSM-5) is obtained through hydro-thermal crystallization and processes such as filtration, washing, drying, baking and the like.

The invention discloses a synthesis method of an MCM-22 family molecular sieve. The method is characterized by comprising the steps of: adding a dilute acid water solution into a hexamethyleneimine template agent; adding a silicon source, an aluminium source, an alkali source, water and an acidified template agent (R) in proportion so as to prepare gel; conducting hydrothermal crystallization, opening a valve under constant temperature, carrying out pressure reduced evaporation to the molecular sieve slurry, recovering the liquid mixture and the template agent; adding a cold dilute acid water solution into the residual slurry, and opening the kettle when the temperature of the residual slurry drops below 50DEG C, performing filtration so as to obtain a solid product, thus obtaining a MCM-22 family molecular sieve finally. With the method provided in the invention, the template agent no longer volatizes, and damage to the human body can be avoided. Meanwhile, stability of the synthesis formula and quality of the molecular sieve is guaranteed. When the template agent is acidified into a salt, the dispersibility is greatly increased, and the obtained MCM-22 family molecular sieve has a uniform crystal phase as well as a high degree of crystallization. After crystallization, the synthesis slurry is subjected pressure reduced evaporation and the template agent is recovered. After acidification, the recovered template agent can be used for MCM-22 family molecular sieve synthesis again.

The invention relates the method for synthesizing titanium molecular screen, belonging to inorganic chemical synthesized technique field. The method comprises the following steps: using silica gel or silicasol as silicon source, using organic titanium acid ester as titanium source, using hexamethylene diamine or piperidine or the mixture of them as organic form agent, synthesizing the guiding agent, preparing reaction liquid, carrying out thermal crystallization, then filtering, washing, drying, calcining, and getting the TS-1 molecular screen. The method has the advantages of low cost, good repeatability and low pollution emission.

The invention discloses a method for synthesis of an MCM-22 molecular sieve. The method is characterized in that a molecular sieve is synthesized under hydrothermal crystallization conditions; a used template agent contains hexamethylene imine and aniline; and a mole ratio of the hexamethylene imine to the aniline is less than 1.2. The method reduces a hexamethylene imine use amount, reduces a cost, inhibits conversion of the MCM-22 molecular sieve into a ZSM-35 molecular sieve, realizes obvious improvement of a product specific surface area and obviously promotes improvement of a mesitylene saturated adsorption capacity.

The invention provides a method for synthesizing a SAPO-35 molecular sieve, comprising the steps as follows: aluminium source, silicon source, phosphor source and organic template agent are mixed as glue so as to prepare reaction mixture with the mol composition of aR:Al2O3:bP2O5:cSiO2:dh2O under the temperature of 35-100 DEG C; the mixture is hydro-thermally crystallized for 0.5-500 hours under the temperature of 150-210 DEG C and the self-pressure; the SAPO-35 molecular sieve is gained by recovering crystallized product; wherein, the organic template agent is hexamethylene imine; wherein, a is 0.5-1.8; b is 0.5-1.5, c is 0.05-2.5 and d is 10-150; the method can synthesize the SAPO-35 molecular sieve with high crystallinity under wide silicon content range; the structure of the SAPO-35 molecular sieve synthesized by the method is basically unchanged before and after the release agent is baked and deprived under high temperature and the SAPO-35 molecular sieve has high specific surface area. The molecular sieve has extremely low alkane selection when being applied to the olefin preparation reaction from dehydration of carbinol; furthermore, the outcome yield of ethane and propylene is high.

The invention discloses a synthesis method of silicoaluminophosphate (SAPO) molecular sieve with a CHA structure and a catalyst prepared by using the molecular. The synthesis method is characterized in that hexamethyleneimine is adopted as a structure-directing agent, and synthesis of the molecular sieve is carried out in the presence of a little amount of SAPO molecular sieve seed crystal with the CHA structure.

The process of preparing cocrystallized molecular sieve of ZSM-35 accounting for 0-100 wt% and MCM-22 adopts the mixture of hexamethylene imine and cyclohexylamine as template agent. Compound of silicon and aluminum, hydroxide of alkali metal, hexamethylene imine, cyclohexylamine and deionized water as materials are crystallized at 90-200 deg.c for some period and reacted completely to synthesize the molecular sieve hydrothermally. The synthesized molecular sieve is catalyst used widely in the catalytic reaction of converting hydrocarbons, such as hydrocarbon isomerization and aromatization, etc.

A nano-class molecular sieve MCM-49 with MWW topologic skeleton structure is prepared from SiO2, Al2O3, alkali, template agent (hexamethyleneimine) and water through proportioning, crystallizing for 12-240 hrs, washing in water, and drying. Its advantages are short period, and high output rate and high crystallinity.

The present invention discloses a method for preparing Ti-MWW molecular sieve film; the high-catalytic-activity Ti-MWW molecular sieve film is prepared on a porous tubular ceramic support by: applying pure-phase Ti-MWW molecular sieve crystal as seed crystal to the outer surface of a tubular support, carrying out double hydrothermal growth, using tetrabutyl titanate and hexamethyleneimine as a titanium source and a template agent respectively, and carrying out acid treatment and calcining. The double hydrothermal growth is used herein, the Ti-MWW molecular sieve film that grows continuous and dense is prepared on a porous mullite support for the first time, the problems that it is difficult to separate and recycle Ti-MWW molecular sieve and the sieve is low in reuse rate are solved, and theoretical and technic basis is laid for the industrial application of titanium-silicon molecular sieve film in catalytic oxidative reaction systems for hydrogen peroxide.

The invention relates to a preparation method of an H beta / HMCM-49 compound molecular sieve, which comprises the steps of: mixing and dissolving sodium aluminate, sodium hydroxide and potassium hydroxide into distilled water; dissolving tetraethylammonium bromide and ammonia water to prepare hexamethonium ammonia water; at normal temperature, reacting sodium and potassium meta-aluminate alkali liquor and the hexamethonium ammonia water with silicon sol, adding Na beta molecular sieve raw powder for crystallizing; dissolving the sodium aluminate into the distilled water, adding hexamethyleneimine; at normal temperature, dropping the silicon sol; adding NaMCM-49 molecular sieve compound molecular sieve raw powder, mixing and introducing O3 or H2O2 for oxidizing to prepare modified H beta / HMCM-49 compound molecular sieve raw powder; exchanging with an ammonium nitrate solution to prepare H beta / HMCM-49 compound molecular sieve raw powder. A compound molecular sieve has efficacy of an MCM-49 molecular sieve and a beta molecular sieve, and has the characteristics of uniform mixing, large average pore diameter, many through holes and strong total acidity.

The invention relates to a method of producing an MCM-49 molecular sieve. The method includes: dissolving sodium metaaluminate or sodium aluminate, and sodium hydroxide into desalted water to prepare an aqueous sodium metaaluminate / alkali solution or an aqueous sodium aluminate / alkali solution; adding ethyl silicate into silica sol to prepare a silica sol / ethyl silicate emulsion; adding hexamethyleneimine into cyclohexylamine to prepare a hexamethyleneimine-cyclohexylamine binary template agent, adding the binary template agent into the silica sol / ethyl silicate emulsion, fully stirring, adding dropwise the aqueous sodium metaaluminate / alkali solution or the aqueous sodium aluminate / alkali solution, adding a NaMCM-49 molecular sieve, colloidizing and crystallizing to prepare the MCM-49 molecular sieve. According to the method, the binary template agent is adopted, the organosilicone source is increased, the using amount of the seed crystal is increased, the crystallizing time is shortened, and the production cost of the MCM-49 molecular sieve is reduced.

The invention discloses a method for synthesizing an SAPO-35 molecular sieve by a two-mode agent, which is characterized in that the method comprises the steps of mixing aluminum source, phosphorus source, silicon source and an organic template to glue at the temperature of room temperature to 100 DEG C and preparing into the reaction mixture with the molar ratio components of a1R1+a2R2: Al2O3: bP2O5: cSiO2: dH2O, wherein R1 and R2 are the organic templates, the value of a1 is 0.5-1.8, the value of a2 is 0.1-1.0, the value of b is 0.5-1.5, the value of c is 0.05-2.5, and the value of d is 10-150; the reaction mixture undergoes hydrothermal crystallization for 0.5-500 hours at the temperature of 150-250 DEG C and the crystallization product is recovered. The R1 is hexamethylene imine, and the R2 is any of cyclohexane, piperidine, tropine, diethylamine and triethylamine. The method provided by the invention can synthesize the high-crystallinity SAPO-35 molecular sieve in a relatively wide silica content range. The SAPO-35 molecular sieve synthesized by the method of the invention is applicable to the hydrocarbon conversion technology. Applied to the olefin preparation reaction by methanol dehydration, the molecular sieve has very low alkane selectivity and high product yield of ethylene and propylene.

The invention belongs to the technical field of synthesis of a photocatalyst, and especially relates to a Fe2O3 / g-C3N4 composite system and a preparation method and an application thereof, which can be used for catalytic degradation of tetracycline hydrochloride pollutants by visible light. The method comprises the following steps: accurately weighing P123 and hexamethylene imine, dissolving the materials in a mixed solution of absolute ethyl alcohol and ethylene glycol, and stirring the materials to obtain a solution A; accurately weighing tetrahydrate ferrous chloride, and adding tetrahydrate ferrous chloride in the solution A and performing ultrasonic dissolving to form a solution B; adding mesoporous g-C3N4 in the solution B to form a fluid suspension C; performing ultrasonic dissolving and magnetic stirring on the fluid suspension C to obtain turbid liquid D; transferring the turbid liquid D to a reaction vessel, and reacting the materials in a baking oven at the temperature of 200 DEG C for 15 h; naturally cooling the materials to room temperature, and performing centrifugation, washing, and drying to obtain a solid F; and placing the solid F in a crucible, and placing the materials in a muffle furnace for calcining to obtain a sample.

A nano-class molecular sieve MCM-49 with MWW topologic skeleton structure is prepared from SiO2, Al2O3, alkali, template agent (hexamethyleneimine) and water through proportioning, crystallizing for 12-240 hrs, washing in water, and drying. Its advantages are short period, and high output rate and high crystallinity.

The invention relates to a method for synthesizing a ZSM-35 molecular sieve by a composite template agent. The method comprises the following steps: dissolving sodium metaaluminate or sodium aluminateand alkali into desalted water to prepare a sodium metaaluminate-alkali aqueous solution or a sodium aluminate-alkali aqueous solution; adding hexamethylene imine into cyclohexane to prepare a composite template agent, adding the composite template agent into silicon sol, completely stirring, dropwise adding the sodium metaaluminate-alkali aqueous solution or the sodium aluminate-alkali aqueous solution until reaching a thick point, increasing the stirring speed, opening gel and slowly adding the residual sodium metaaluminate-alkali aqueous solution or the sodium aluminate-alkali aqueous solution; adding the ZSM-35 molecular sieve, stirring, gelatinizing and crystallizing, and synthesizing a high-nanoscale ZSM-35 molecular sieve.

The invention discloses a synthesis method of an MCM (Mobil Composition of Matter)-22 molecular sieve. The synthesis method is characterized by comprising the steps of mixing raw materials to obtain a mixture A, wherein the raw materials include a silicon source, an aluminum source, an alkaline source, a template agent and deionized water; treating the obtained mixture A under a hydrothermal crystallization condition to obtain a guiding agent; mixing the guiding agent, the silicon source, the aluminum source, the alkaline source, phenylamine and the deionized water to obtain a mixture B; crystallizing the obtained mixture B under a hydrothermal condition and recovering a product, wherein the template agent is hexamethyleneimine or a hexamethyleneimine and phenylamine mixture containing hexamethyleneimine and phenylamine which are in the molar ratio of at least 0.05:1, and the weight ratio (measured by SiO2) of the silicon source from the guiding agent in the mixture B to the total silicon source in the mixture B is (0.05-1):1. The method can be used for effectively reducing the consumption of hexamethyleneimine, improving the stability of the MCM-22 molecular sieve and inhibiting the crystal transformation of the molecular sieve.

The invention discloses 3-aryl-7H-thiazol[3,2-b]-1,2,4-triazinyl-7-one derivatives and application thereof, particularly 3-aryl-7H-thiazol[3,2-b]-1,2,4-triazinyl-7-one derivatives disclosed as general formula I or pharmaceutically acceptable hydrates and salts thereof, and application in enhancing memory of patients with dementia and Alzheimer's disease. In the general formula I, R1 and R2 are respectively and randomly one or two or three of H, halogens, hydroxy group, methoxy group, methyl group, nitro-group, -O(CH2)n1NR3R4 and -O(CH2)n2CONR5R6; R3, R4, R5 and R6 are respectively selected from methyl group, ethyl group, pyrrolidinyl group formed by the methyl or ethyl group and nitrogen atom connected with the methyl or ethyl, methylpyrrolidinyl group, dimethylpyrrolidinyl group, piperidyl group, morpholinyl group or hexamethylene imino group ring; n1 is a whole number ranging from 2 to 6; n2 is a whole number ranging from 1 to 6; and X is O or S.

The invention provides a preparation method of an MWW structure molecular sieve. The method comprises the following steps: 1, mixing a silicon source, an aluminum source, an alkali agent, a template and water, crystallizing the obtained glue solution, and cooling the crystallized glue solution to obtain a layered system with the upper layer being an organic phase and the lower layer being a molecular sieve slurry, wherein the template contains hexamethyleneimine and aniline; 2, separating the layered system to obtain the organic phase and the molecular sieve slurry; and 3, filtering the molecular sieve slurry, sequentially washing, drying and roasting the obtained filter cake, and distilling or rectifying the obtained filtrate to recover a hexamethyleneimine and water azeotrope and an aniline and water azeotrope. The method allows the superfluous template obtained after crystallization to be fully removed and recovered, and the generation probability of mixed crystals can be reduced when the template is reused; and the method can avoid environment pollution induced by hexamethyleneimine in discharged wastes.

The invention discloses a novel liquid crystal orientation agent, a diamine, and a polyimide precursor. Provided is a liquid crystal orientation agent from which it is possible to obtain a liquid crystal orientation film which has a high voltage retention rate and high rubbing resistance, and is capable of quickly reducing a stored charge, and specifically, is capable of suppressing a shift in the rubbing direction and in the liquid-crystal orientation direction in an in-plane switching device. Provided are: a polyimide precursor obtained by reacting a tetracarboxylic acid derivative component with a diamine component containing a diamine represented by formula (1); and a liquid crystal orientation agent containing one or more types of polymer selected from a group consisting of polyimides obtained by ring-closing the polyimide precursor. (R1 represents hydrogen or a monovalent organic group. Q1 represents a C1-5 alkylene group, Cy is a divalent group comprising azetidine, pyrrolidine, piperidine, or hexamethyleneimine, and a substituent group may be bonded to the ring segment of these groups. R2 and R3 are monovalent organic groups, and q and r each independently represents an integer of 0-4. In addition, when the sum of q and r is 2 or more, the plurality of R2 and R3 are as defined above.) (as shown in the description)

The invention discloses a pillared layered mordenite, and a preparation method thereof. According to the preparation method, silica sol is taken as a silicon source, sodium metaaluminate is taken as an aluminium source, hexamethylene imine is taken as a templating agent, dynamic hydrothermal synthesis is adopted to synthesize a swellable layered mordenite, the swellable layered mordenite is subjected to swelling with hexadecyl polyoxyethylene hexadecyl ammonium bromide, and an obtained swelled layered mordenite is reacted with tetraethoxysilane for pillaring so as to obtain the pillared layered mordenite. The preparation method is capable of obtaining the pillared layered mordenite with a novel structure; swelling and pillaring are carried out under mild conditions; destroy of high temperature and high pH value on molecular sieve skeleton and acid sites is avoided; the adopted swelling agent is cheap and easily available; and industrialized production is realized.

The present invention relates to a HMCM-49 molecular sieve production method, which comprises: adopting silica sol, sodium aluminate or sodium aluminate, hexamethyleneimine, desalted water, hydrogen peroxide and citric acid as raw materials, and carrying out material preparing, gelatinizing and crystallization in a reaction kettle; adopting a plate and frame filter press to separate a mother liquor to be recycled; adding the desalted water to filter cake, adopting hydrogen peroxide to carry out oxidation, cooling, and adopting a 5-20% citric acid aqueous solution to carry out pulping; and adopting a spiral vane type dynamic filter press to carry out washing and exchanging, and carrying out drying and roasting to obtain the HMCM-49 molecular sieve, wherein the liquid portion is subjected to evaporation and condensation to be adopted as the desalted water so as to be recycled. According to the present invention, the wastewater emission amount is 1 / 20 of the wastewater emission amount of the traditional process, the waste gas emission amount is 1 / 2-1 / 3 of the waste gas emission amount of the traditional process, and the solid sodium citrate waste can be used in a degradation manner.

The invention discloses a dynamic hydrothermal synthesis method of an exfoliated type MWW lamellar molecular sieve. According to the method, silica sol is taken as a silicon source, sodium metaaluminate is taken as an aluminum source, HMI (hexamethyleneimine) and CPAB are taken as a structure-directing agent, and the exfoliated type MWW lamellar molecular sieve can be synthesized through dynamic hydrothermal synthesis with one step. The synthesis method is simple, and the structure-directing agent is industrialized, low in cost and suitable for industrial production of the exfoliated type MWW lamellar molecular sieve.

The invention discloses a coating material capable of reducing light reflection of a glass surface. The coating material comprises the components of ethyl orthosilicate, ethanol, water, nitric acid and ammonia water and the auxiliary agents of ethyl orthosilicate, P123, Tritonx-100 and hexamethyleneimine. A film formed after the coating material provided in the invention is coated on a glass surface is composed of cylindrical protrusions which present a certain rule and are vertically arranged, and the top of each of the cylindrical protrusions is semispherical, which enables the refractive index of the glass surface to gradiently vary when only one layer of the film is coated on the glass surface, thereby enabling reflectivity of the glass surface to be reduced.