50results about How to "High yield in one pot" patented technology

The invention provides an H-ZSM-5 zeolite catalyst for preparing propylene from methanol and an application thereof. An H-ZSM-5 zeolite with small crystal grains obtained by directional preparation through the hydrothermal synthesis technology has small crystal grain size and high specific surface area, and can achieve the purpose of shortening the length of a diffusion path of molecules of a product, improving the diffusion performance of the catalyst and reducing the secondary reaction of a low-carbon olefin product. The H-ZSM-5 zeolite catalyst is used in the reaction for preparing the propylene from the methanol, the yield of the propylene and the P/E (propylene/ethylene) weight ratio are greatly improved, and the P/E weight ratio is above 8.

The invention discloses one Y zeolite compound material's synthesizing method, its characteristic lay in this method includes the kleit roasts under 500 - 900 íµ temperatures the dehydration transforms the leaning kleit, the smashing, then made the particle size which is smaller than 230 microns powder, then joined the sodium silicate, the guide medicinal preparation, the sodium hydroxide and the water, the crystallization, filtered, the collection mother liquor, and then collect the mother liquor direct sales commission, which played partial or the complete sodium silicate and the sodium hydroxide role.

The invention discloses a synthesizing method of high crystallinity ZSM-5 molecular sieve without using organic template, comprising the following steps: mixing silicon source and aluminum source with de-ionized water and inorganic base (needless if two silicon source is used) according to a certain proportion, wherein, the silicon source is unbodied solid of silicon dioxide or the mixture of the unbodied solid of silicon dioxide and solid metasilicate, and the aluminum source is aluminate or aluminum compounds; placing the mixture in a stainless steel reaction kettle provided with a teflon lining and performing hydrothermal crystallization under certain condition. The invention is characterized in that the high crystallinity ZSM-5 molecular sieve can be obtained without adding crystal seed into the mixture; and the ratio of water to silicon is small and the solid content is high; the expensive and environment-unfriendly organic template and the corrosive inorganic acid are not used. The invention has the advantages of low production cost, high productivity of single kettle, simple technology and environmental protection.

The invention relates to a preparation method of an H-ZSM-5 molecular sieve based catalyst and a prepared catalyst; preheating is performed before sealed hydrothermal crystallization through hydro-thermal synthesis technology, which reduces the water content of a gel mixture, increases the solid content of the system, thus reaches the target of producing small crystal grains, and greatly improves the yield per single kettle of the molecular sieve; meanwhile the product separation process is avoided, which reduces the discharge of amine-containing waste water, and reduces environment pollution. With the catalyst of the present invention, the length of the product molecular diffusion path is shortened; the diffusion performance of the catalyst is improved; the secondary reaction of low carbon olefins is reduced; thus the propylene selectivity and P/E ratio are increased; and substances above C4 are ensured to be mainly olefins, and especially to be olefins with poor side chains.

The invention relates to a catalyst component used for olefin polymerization and a preparation method thereof as well as a catalyst used for olefin polymerization and application. The catalyst component comprises reaction products of the following components: (1) a solid component and (2) at least one titanium compound, wherein the solid component comprises a magnesium compound shown in Formula (1) (shown in the description) and epoxy alkanes compounds shown in Formula (2) (shown in the description); R1 is linear alkyls or branched alkyls with C1-C12; R2 is the same as or different from R3; R2 and R3 are hydrogen, or linear alkyls or branched alkyls with C1-C5 independently; hydrogen on alkyls is optionally replaced by halogen; X is halogen, m ranges from 0.1 to 1.9, n ranges from 0.1 to 1.9, and m plus n is equal to 2. By adopting the catalyst component in the process of olefin polymerization, relatively high polymerization activity and relatively high stereotactic capability can be acquired.

The present invention is the synthesis process of Ti-Si molecular sieve, TS-1 molecular sieve, and belongs to the field of inorganic chemical synthesis. The materials, including solid silica gel, Ti(SO4)2, organic alkali template and water, are prepared into TS-1 molecular sieve via a three-step reaction process, including the preparation of solid silica gel and Ti(SO4)2 mixture, the preparationof reaction mixture and hydrothermal crystallization, and routine filtering, washing, drying and roasting. Inside the solid silica gel and Ti(SO4)2 mixture, Ti(SO4)2 is single-layer dispersed in thesurface of solid silica gel. The process has the advantages of cheap materials, no need of hydrolysis, less consumption of organic template agent, easy-to-control process, high repeatability, high yield and low cost.

The invention discloses a method for preparing nanoscale boron modified HZSM-5 by seed crystal directing. The method comprises the steps as follows: (1) mixing an aluminum source, a silicon source, an alkali source, a boron source, ZSM-5 molecular sieve seed crystals and water, adjusting the pH of an obtained mixture to 10-12 and mixing the mixture uniformly to form gel; (2) crystallizing the gel in a reactor, and performing solid-liquid separation, washing and drying on a crystallized product to obtain a dried crystallized product; (3) adding the dried crystallized product in an ammonium salt solution for ion exchange to obtain an ammonia type ZSM-5 molecular sieve; (4) roasting the ammonia type ZSM-5 molecular sieve to obtain HZSM-5. The invention further discloses a molecular sieve prepared by the method and application of the molecular sieve in a reaction of methanol to propylene. The boron modified HZSM-5 requires no roasting of a template agent and is environment-friendly, the propylene yield and the service life are greatly increased, the selectivity of propylene reaches 44.0wt% or higher, and the service life reaches 500 h or longer.

The invention relates to a method for synthesizing a granular beta molecular sieve with montmorillonoid, comprising the following steps: acidification treatment and high-temperature roasting are carried out to the montmorillonoid, and the montmorillonoid which is acidified is soaked and heated by template agents, and then the montmorillonoid which is activated is used as raw material to provide total or partial aluminum source, and then the granular beta molecular sieve is prepared by adding template agents and carrying out hydrothermal crystallization; in the invention, the prepared beta molecular sieve grows on the surface of the montmorillonoid closely, so as to form a similar core-shell structure, and the catalytic reaction efficiency is improved by shortening the diffused route of reactants and product molecules in a molecular sieve crystal. The method not only expands the raw material range for synthesizing the beta molecular sieve, but also further reduces the preparation cost of the beta molecular sieve with a crystal seed method.

A mordenite preparation method is characterized in that after being reacted with diluted hydrochloric acid according to molar ratio of HCl/Al203 ranging from 0.04 to0.05 and molar ratio of H2O/Al203 ranging from 70-75, pseudo-boehmite is added into silica gel powder according to silicon to aluminum molar ratio ranging from 11.0 to 12.5 to realize pulping, uniform mixing and drying, then mixture is added into liquor mixture added with crystallized mother liquor, sodium chloride and sodium hydroxide according to molar ratio of Na2O/SiO2 ranging from 0.25 to 0.30, molar ratio of H2O/Na2O rangingfrom 25.0 to 30.0 and molar ratio of Cl/Al203 ranging from 0.4 to 0.5 and is stirred for 1 hour to 8 hours, and then two sections of thermal crystallization are realized at the temperature of 120 DEGC for 8 hours to 14 hours and at the temperature of 200 DEG C for 36 hours to 72 hours; and mordenite with the grain size ranging from 10 micrometers to 20 micrometers, silicon to aluminum molar ratio ranging from 11.0 to12.0 and a pure MOR (mordenite) structure is prepared. Compared with a conventional product, the mordenite prepared by the method has the advantages that crystallinity is improved by 30%, Langmuir specific surface area is larger than or equal to 400 square meters per gram, the mordenite is extremely rich in acid site density, and activity is improved when the mordenite is used in catalyst. In addition, any organic additives are not added in a preparation process, yield of a single kettle is high, the mother liquor can be recycled, emission is reduced, and the mordenite preparation method belongs to clean, high-efficiency, safe and green preparation technology.

The invention relates to a solid composition as well as a preparation method and application thereof. The solid composition comprises a magnesium compound shown in the formula (1) (shown in the description) and an epoxy alkanes compound shown in the formula (2) (shown in the description), wherein R1 is linear or branched alkyl of C1-C12; R2 and R3 are identical or different, and are independently hydrogen or linear or branched alkyl with C1-C5; hydrogen on alkyl is alternately replaced by halogens; X is halogen; m is a number from 0.1 to 1.9, n is a number from 0.1 to 1.9, and m plus 2 is equal to 2; relative to each mole of the magnesium compound shown in the formula (1), the epoxy alkanes compound shown in the formula (2) is 0.01-0.8 mole. When being used for propylene polymerization, a catalyst prepared by the solid composition disclosed by the invention is higher in polymerization activity and higher in stereotactic capacity.

The invention discloses Ba hetero atom-containing LTL molecular sieve and a preparation method thereof. The preparation method of the molecular sieve comprises the following steps: a barium source, inorganic base, an aluminium source, a silicon source, water and alcohol are mixed according to a mol ratio in order to obtain sol, aging and crystallization are carried out in order, obtained solid is separated, washing and drying are carried out, and after roasting, the molecular sieve is obtained. The molecular sieve is advantageous in that: 1. the synthetic method is simple, single kettle yield is high, and synthesis and operation cost are low; 2. the product has good degree of crystallization, purity, and structured morphology; 3. the Ba hetero atom-containing LTL molecular sieve is used in an aromatization reaction of normal paraffins, and can obviously improve yield of aromatic hydrocarbons, especially yield of C8 aromatic hydrocarbons, and the molecular sieve has good application prospects.

The invention relates to an H[beta] molecular sieve preparing method capable of increasing the silicon-aluminum ratio. The preparing method comprises following steps: (1) mixing a silicon dioxide source, an aluminum oxide source, a sodium oxide source and water, wherein molar ratios of the raw materials are described as follows: SiO2/Al2O3=5-25, Na2O/SiO2=0.18-0.5 and H2O/SiO2=1-6, stirring the raw materials to generate initial gel and continuously stirring the gel until the gel is turned into dry gel, adding a [beta]-molecular sieve seed crystal, performing hydrothermal crystallization at 100-180 DEG C for 12-130 h, and filtering and washing a reaction product to obtain Na[beta] zeolite; and (2) adding water to the Na[beta] zeolite sample with pulping, adding an ammonium salt and an acid, performing a reaction at 20-110 DEG C for 0.5-24 h, filtering and washing a reaction product, and drying and roasting the reaction product to obtain an H[beta] molecular sieve. Because that the preparation process is free of organic template agents, a high-temperature roasting for removing the organic template agent is not required, so that the preparing method is reduced in cost effectively and is reduced in pollutant discharge. By means of the method in the invention, the high-quality H[beta] molecular sieve being 6-200 in the silicon-aluminum ratio can be synthesized with a low cost. The H[beta] molecular sieve can be used in conversion of hydrocarbons, and especially can be used as an excellent catalyst component in catalytic cracking, hydroisomerization and hydrocracking.

A preparation method of a ZSM-5 molecular sieve is characterized in that the method comprises the following steps: allowing a first mixture obtained by uniformly mixing a silicon source, an alkali, crystal seeds and water to stay in a closed reaction kettle at a constant temperature of 150-200DEG C for 10h or below, adding a second mixture obtained by uniformly mixing an aluminum source, the alkali and water, carrying out hydrothermal crystallization on the above obtained third mixture in the closed reaction kettle at 140-180DEG C for 5-20h, and recovering the finally obtained product, wherein a molar ratio of M2O/SiO2 of the first mixture is 0.03-0.07, a molar ratio of H2O/SiO2 of the first mixture is 5-10, the addition amount of the crystal seeds is 1-10% of the weight of the silicon source calculated by silica, a molar ratio of SiO2/Al2O3 of the first mixture is 20-100, a molar ratio of M2O/SiO2 of the third mixture is 0.03-0.15, and a molar ratio of H2O/SiO2 of the third mixture is 5-15. The method has the advantages of no use of a template, high yield of a single kettle, and high silicon utilization rate.

A preparation method of ZSM-5 molecular sieve is characterized by comprising the following steps: carrying out hydro-thermal treatment on a first mixture composed of a first silicon source, alkali, seed crystal and water, adding the first mixture which has undergone the hydro-thermal treatment into a second mixture composed of a second silicon source, an aluminium source, alkali and water so as to obtain a third mixture, and carrying out hydrothermal crystallization on the third mixture, wherein the first silicon source is silica gel and the second silicon source is silica sol or water glass. According to the preparation method, the molecular sieve is synthesized without usage of a template and under conditions of low water-to-silicon ratio, controlled heating rate and two-stage crystallization. The preparation method has characteristics of high single-autoclave yield, simple process and high utilization rate of silicon. The prepared ZSM-5 molecular sieve has complete crystal grain, high degree of crystallization and specific hexagon morphology.

The invention relates to an organic-template-free [beta]-molecular sieve synthesizing method which includes following steps: mixing a silicon dioxide source, an aluminum oxide source, a sodium oxide source and water, wherein molar ratios of the raw materials are described as follows: SiO2/Al2O3=5-25, Na2O/SiO2=0.18-0.5 and H2O/SiO2=1-7.6, stirring the raw materials to generate initial gel and continuously stirring the gel until the gel is turned into dry gel, adding a [beta]-molecular sieve seed crystal, and performing hydrothermal crystallization at 100-180 DEG C for 12-130 h to obtain the [beta]-molecular sieve, wherein the ratio of SiO2 to Al2O3 in the [beta]-molecular sieve seed crystal is 11-70 and the addition amount of the [beta]-molecular sieve seed crystal is 0.5-5% by mass of the silicon dioxide source. By means of the method, the high-quality [beta]-molecular sieve crystal can be directly synthesized. Because that the addition amount of the seed crystal is less and the synthetic temperature is low, the synthesizing method is effectively reduced in cost. Because that none organic template free is added, the [beta]-molecular sieve has unobstructed pore channels without roasting, thereby further reducing the energy consumption during the production process. Because that the added water is quite less in amount, the synthesizing method is increased in utilization rate of the silicon source and is greatly increased in yield of single kettle.

The invention relates to a method for preparing fluorocarbon alkyl imidazonline through fixed bed catalytic reaction. The method comprises taking perfluoro-carboxylic acid and polyethylene-polyamine at a mole ratio of acid to amide being 1 to 1.02-1 to1.1; adding the polyethylene-polyamine into a preheater, heating the polyethylene-polyamine to 30-35 DEG C, adding the perfluoro-carboxylic acid under stirring, increasing the temperature to 110-150 DEG C and performing heat preservation for 30-40 minutes; circulating preheated liquid through a fixed bed feeding pump and a fixed bed reflux pump at a reaction temperature of 150-160 DEG C; providing a vacuum degree of 0-0.03 MPa for a fixed bed, pumping out produced water, and after 4-6 hours' reaction, testing whether the content of a product is greater than 96% through the ultraviolet spectrophotometry, if so, determining that the product is qualified, wherein the obtained product is N-aminoethyl (or diethyltoluenediamine)-fluorocarbon alkyl imidazonline. The method for preparing the fluorocarbon alkyl imidazonline through fixed bed catalytic reaction has the advantages of being simple in process, free from solvent, stable in operation and control, short in reaction time, high in single-reactor yield and purity, low in three-waste pollution, environmentally friendly and easy to industrialize.