1233 results about "Modified zeolite" patented technology

The modified octahedral zeolite is prepared through the once exchange reaction of octahedral zeolite, phosphorus compound and ammonium compound, the further reaction inside exchange slurry with introduced RE solution, filtering, washing and roasting in vapor. The catalyst contains the modified octahedral zeolite 5-45 wt%, clay 15-85 wt% and heat resistant inorganic oxide 15-85 wt%. The catalyst is prepared through mixing the zeolite component, clay and the precursor of the heat resistant inorganic oxide, spraying to form and washing. The catalyst has high activity stability, high gasoline yield, low coke yield, strong heavy oil cracking capacity and high heavy metal pollution resistance.

An acidic amorphous silica-amumina has a large specific surface area and a large pore volume. A carrier complex and a hydrotreating catalyst containing acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing acidic amorphous silica-alumina in combination with a modified zeolite-Y, treats petroleum hydrocarbon materials to produce middle distillates. The amorphous silica-alumina has a SiO2 content of 10-50 wt. %, a specific surface area of 300-600 m2 / g, a pore volume of 0.8-1.5 ml / g and an IR acidity of 0.25-0.60 mmol / g. The catalyst shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates with a higher yield.

The invention discloses a catalyst for preparing aromatic hydrocarbon through methanol conversion. The catalyst comprises a component A and components B, wherein the mass ratio of component A to components B is 0.25-4; the component A is a modified zeolite molecular sieve and comprises 80-99wt% of molecular sieves and 1-20wt% of molecular sieve modifiers; the components B are oxide loaded metallic elements and halogen and comprise 85-95wt% of oxide, 0.5-10wt% of total metallic elements and 0.1-5wt% of halogen; and the component A and the components B are formed through squashing or extruding after being mixed uniformly. The catalyst has the following characteristics that: (1) the total recovery of benzene, toluene and xylene is higher and selectivity is high; (2) the raw material treatment capacity is large; (3) the non-aromatic hydrocarbon liquid product can serve as the solvent oil or gasoline component; (4) C4 hydrocarbon and non-aromatic hydrocarbon liquid phase products in the gas phase product can circularly enter into the catalyst bed layer, thus not only balancing the reaction heat but also improving the total recovery of the aromatic hydrocarbon; and (5) the catalyst has high activity and long life.

The invention provides a catalyst for high-selectivity preparation of light aromatic hydrocarbon by using synthesis gas and a preparation method thereof and belongs to the field of catalysts. The catalyst is prepared from, by mass, 20%-60% of modified zeolite molecular sieve and 40%-80% of zirconium-containing composite oxide. The preparation method comprises the steps that the zirconium-containing composite oxide is added to a solvent, and ultrasonic dispersion is performed to obtain a solution A; the modified zeolite molecular sieve is added into the solution A; the mixture obtained after ultrasonic dispersion is subjected to suction filtration, and the obtained filter cake after washing is dried; the sample obtained after drying is grinded into powder; the powdery sample is calcinated, and the obtained sample is the catalyst for high-selectivity preparation of the light aromatic hydrocarbon by using synthesis gas. The light aromatic hydrocarbon can be prepared in a high-selectivity mode, and the stability is good. The preparation method of the catalyst for high-selectivity preparation of the light aromatic hydrocarbon by using the synthesis gas is simple and low in cost and has good industrial application prospect.

A method for removing arsenic species from an aqueous medium with modified zeolite minerals comprising providing an aqueous medium containing arsenic species in the form of both arsenate and arsenite, contacting the aqueous medium with an iron (II) laden zeolite mineral so that arsenic in the form of at least one of arsenate and arsenite contained in the aqueous medium can be adsorbed onto the iron (II) laden zeolite mineral forming an arsenic adsorbed iron (II) laden zeolite mineral, and separating the arsenic adsorbed iron (II) laden zeolite mineral from the aqueous medium.

The invention relates to a method for hydrogenating naphthenic base distillate to produce lubricating oil basic oil. The naphthenic distillate is used as raw material and a one-stage in series hydrogenation process of hydrotreating-hydrodewaxing-hydrofinishing is adopted to produce the lubricating oil basic oil. Ordinary hydrotreating catalysts are filled in the upper part of a hydrotreating reaction area, and hydrotreating catalysts containing modified zeolites are filled in the lower part of the hydrotreating reaction area. The hydrodewaxing and hydrofinishing reaction areas are the same as those of the prior art, and are filled with hydrodewaxing catalysts and hydrofinishing catalysts. Compared with the prior art, the method disclosed by the invention has the advantages that system energy consumption is reduced, the pour point of a product is properly reduced, and the stability of the product is effectively improved.

The invention discloses a nano-biological water body remediation agent for aquaculture and a preparation method thereof. The nano-biological water body remediation agent comprises a carrier and complex bacteria attached to the carrier, wherein the carrier comprises the following ingredients in percentage by weight: 10-70 wt% of nano tourmaline, 10-70 wt% of nano titanium dioxide, 10-70 wt% of modified zeolite and 10-50 wt% of montmorillonite, and the complex bacteria comprise photosynthetic bacteria, denitrifying bacteria, nitrifying bacteria and phosphorus accumulating bacteria. The nano-biological water body remediation agent for aquaculture, disclosed by the invention, is economical and environment-friendly and is simple and convenient to prepare; the adsorption characteristics of the natural mineral materials are cooperated with the degradation characteristics of the microorganisms, so that organics in a water body can be efficiently adsorbed and degraded, and the remediation efficiency of water quality is higher; and the microorganisms can increase the dissolved oxygen in the water body while harmful substances, such as ammonia nitrogen and hydrogen sulfide, are efficiently decomposed, excellent-quality baits can be supplied to aquatic livestock through the propagation of the microorganisms, and the secondary pollution on the water body cannot be caused.

The present invention relates to a highly active midbarrel hydrocracking catalyst and a process for the preparation thereof. The support of the catalyst comprises a modified zeolite-Y, a modified zeolite-beta, alumina, etc. The composite of the modified zeolite-Y and zeolite-beta exhibits a good synergistically catalytic effect. The catalyst prepared by supporting Group VIB and / or Group VIII metal components is useful in the hydrocacking of heavy oils with high content of sulfur and nitrogen to produce high quality middle distillates with maximum output. The activity of and selectivity to middle distillates of the catalyst are remarkably raised simultaneously. Moreover, the solidifying point of the produced diesel is remarkably lowered.

The invention provides a method for preparing ethylene and propylene and co-producing p-xylene through methanol / dimethyl ether conversion. The method adopts a silanization-modified zeolite catalyst to co-produce p-xylene as a main component in aromatic hydrocarbon while preparing ethylene and propylene through methanol conversion. The overall selectivity of ethylene, propylene and p-xylene in hydrocarbon products is more than 80 percent by weight. The selectivity of p-xylene in xylene isomers is more than 99 percent by weight.

A process for removing heavy metals and the organic substance difficult to degradate from sewage includes proportioning Fe and Cu, adding cationic surfactant modified zeolite, stirring, loading the mixture in filter pool, regulating pH value to 4.5-11, reaction, and regulating pH value to 8-9 to generate Fe(OH)3 as flocculant, which can coagulate the suspended solid and colloid and absorb and soluble pollutants for depositing them. Its advanrtages are high power, effect and high speed.

A hydrocarbon cracking catalyst containing modified octahedra zeolite is prepared from modified octahedra zeolite, one or moke kinds of other modified zeolite, clay and refractory inorganic oxide through proportional mixing, spray shaping, and washing. Its advantages are high activity and stability, high gasoline output rate, low coke output rate, and high resistance to heavy metal pollution.

A method for producing propylene and light aromatic hydrocarbon comprises the steps of contacting heavy hydrocarbons and / or grease with a cracking catalyst containing modified beta zeolite in a first reactor for catalytic cracking reaction, contacting C4 hydrocarbon fraction and / or light gasoline fraction with the cracking catalyst containing modified beta zeolite in a second reactor for catalytic cracking reaction, and then leading the reaction products into a third reactor for reaction. The hydrocarbon-gasoline conversion method provided by the invention has the advantages of higher propylene yield and light aromatic hydrocarbon yield.

The invention relates to a catalyst for a normal paraffin hydroisomerization reaction and a preparation method as well as an application thereof. The catalyst has the characteristics that the activity is high in an n-hexane hydroisomerization reaction, and the selectivity and stability are good for a double-branched-chain product. The catalyst comprises modified zeolite molecular sieve ZSM-12 treated by alkaline solution and noble metal of family VIII, wherein the zeolite molecular sieve ZSM-12 adopts zeolite molecular sieve ZSM-12 containing organic amine template. The preparation method of the catalyst comprises the following steps of: desilication of zeolite molecular sieve ZSM-12 containing template after being treated with alkaline solution to obtain zeolite molecular sieve ZSM-12 with high content of mesoporous, and preparing isomerized catalyst by loading Pt. The catalyst is applied in the normal paraffin hydroisomerization reaction, when the catalyst is applied, the n-hexane hydroisomerization reaction is carried out on a fixed bed miniature reactor, the reacting raw material n-hexane is fed into the reactor by a force pump, and is contacted with the catalyst to react in the reactor after being mixed with hydrogen in a mixer.

The invention relates to a method for preparing hollow cavity type ZSM-5 modified zeolite molecular sieve, and aims to solve the problems that the microcellular structure diffusion admittance is narrow, the modified zeolite molecular sieve has lower relative degree of crystallinity, and the adjustable range of apertures inside molecular sieve is small, thereby facilitating macromolecule reaction limited by diffusion. The invention adopts at least one 0.1-8.5 mol / L acid solution of hydrochloric acid, nitric acid, sulphuric acid or acetic acid to treat ZSM-5 molecular sieve raw powder with the silica alumina ratio SiO2 / Al2O3 being 20-1000 and the particle size being 0.4-10 Mum for 1-8 h; then at least one 0.1-5.0 mol / L aqueous alkali of sodium hydroxide, magnesium hydrate, potassium hydroxide, sodium carbonate or sodium bicarbonate is used for treatment for 1-48 h at 20-90 DEG C; and at least one 0.1-8.5 mol / L acid solution of hydrochloric acid, nitric acid, sulphuric acid or acetic acid is used for treatment for 1-48 h at 20-90 DEG C to obtain the modified ZSM-5 molecular sieve. The problems are well solved, and the invention can be used in industrial production of macromolecule catalysis and transformation catalysts.

The invention discloses an alumina support containing Y zeolite and relative preparing method. The carrier utilizes the Y zeolite and alumina as carriers, while the property of zeolite can be changed via changing the metallic positive ions between the VIB group and / or VIII group to adjust the acid distribution, especially the proportion of B acid and L acid. The invention can be used a carrier of hydro-treating catalyst to fraction prepare the winter cleaning diesel fuel from poor diesel fuel.

The present invention relates to a highly active midbarrel hydrocracking catalyst and a process for the preparation thereof. The support of the catalyst comprises a modified zeolite-Y, a modified zeolite-beta, alumina, etc. The composite of the modified zeolite-Y and zeolite-beta exhibits a good synergistically catalytic effect. The catalyst prepared by supporting Group VIB and / or Group VIII metal components is useful in the hydrocacking of heavy oils with high content of sulfur and nitrogen to produce high quality middle distillates with maximum output. The activity of and selectivity to middle distillates of the catalyst are remarkably raised simultaneously. Moreover, the solidifying point of the produced diesel is remarkably lowered.

The invention discloses a catalyst for preparing paraxylene by methyl alcohol conversion, a preparation method thereof and application. The catalyst provided by the invention is obtained by the method that the surface acidity and the pore structure of a metal modified zeolite molecular sieve are decorated by siloxy group compound; metal content is 0.1-10 wt% of total content of catalyst, and decorated zeolite molecular sieve bearing amount which is accounted by Si is 0.1-8 wt% of total content of catalyst; aromatic hydrocarbon content in obtained hydrocarbon products is more than 60 wt%, the selectivity of paraxylene in aromatic hydrocarbon is more than 85 wt%, and the selectivity of paraxylene in xylene isomers is more than 95 wt%.

The invention relates to a culture method of hericium erinaceus. A culture medium of hericium erinaceus is prepared from the following components in parts by weight: 65-70 parts of saw dust, 12-17 parts of walnut shell, 5-6 parts of solidago decurrens, 1-2 parts of vinegar residue, 12-15 parts of wheat bran, 5-8 parts of bean pulp, 1-2 parts of gypsum powder, 1-2 parts of cicada slough powder, 0.2-0.3 part of potassium dihydrogen phosphate, 1-2 parts of citric acid residues, 1-2 parts of gynostemma pentaphyllum powder, 1-2 parts of japanese metaplexis pericarp powder, 0.5-0.8 part of hawthorn powder, 1-2 parts of poncirus leaf powder and 3-4 parts of modified zeolite powder. The culture method comprises the following steps of: mixing the components in proportion; adding water and uniformly mixing; bagging; sterilizing; inoculating; growing fungi in a fungus growth room; fruiting; and harvesting. The culture medium has a scientific formula; cultured hericium erinaceus has rich nutrition, high content of microelements, vitamins and calcium, a hypertension relieving healthcare function and high anti-infection capacity during a fruiting period, and the yield of hericium erinaceus is high; meanwhile, the waste is changed into an edible substance, and an effect of turning waste into wealth is achieved so as to make contribution to the conservation-oriented society.

A catalyst for cracking the waste plastics to produce fuel oil (gasoline or diesel oil) may be the DeLaZSM-5 prepared by modifying zeolite molecular sieve ZSM-5 or the composite cracking catalyst containing at least two carried metallic oxides as active components. Its advantages are low cracking temp and high output rate and quality of fuel oil.

The invention relates to a composite soil conditioner, comprising biogas residues, pyroligneous acid, mineral powder, soluble chitosan, diethylene triaminepentaacetic acid pentasodium, a surfactant, tobacco powder, trehalose, di-rhamnolipid, a flocculating component, a penetrating agent, enteromorpha powder, modified zeolite, boron-zinc-magnesium-containing fungicide, a nano additive, an accelerant, pentaerythritol triacrylate and ionic liquid, preferably also comprising 4-methyl phenyl valerate which is equal to the ionic liquid in weight. The novel composite soil conditioner has excellent soil improvement and recovery performance, the utilization rate of the fertilizer by the crop is greatly increased, and the composite soil conditioner can significantly increase the yield, simultaneously also can improve the permeability of the soil and avoids side effects of heavy metals such as cadmium; thus, the composite soil conditioner is beneficial to crop growth and has a wide industrial application prospect.

The present invention is one kind of composite zeolite biofertilizer and its preparation process. The zeolite is first modified to loosen its frame structure, raise the content of effective components, such as P2O5 and K2O, in zeolite, and raise its unique chemical and physical performance, ion exchange property, adsorption and catalytic property. The modified zeolite is then compounded with several kinds of organic matter as carrier, inoculated with composite ferment bacteria for fermentation into base fertilizer, and compounded with ammonium humate fertilizer, nitrogen fertilizer, phosphate fertilizer and potash fertilizer and trace element fertilizer, so as to form the composite green fertilizer capable of providing plant with multiple nutrient components to raise the yield and quality of plant.

The invention discloses a preparation method of a magnetic chitosan / cationic surface active agent modified zeolite adsorbent, which comprises preparing the magnetic chitosan / zeolite with ferroferric oxide, the zeolite and the chitosan serving as raw materials; mixing the magnetic chitosan / zeolite with cationic surface active agent solution; and obtaining the magnetic chitosan / cationic surface active agent modified zeolite adsorbent through constant-temperature water-bath oscillation. The prepared adsorbent can be applied to removing organic pollutants such as humic acid and congo red in water and removing heavy metal pollutants such as copper ions. Efficient utilization of cheap natural resources is achieved. The prepared product is suitable for removing soluble organic pollutants in drinking water, anionic dye in printing and dyeing wastewater and the heavy metal pollutants such as the copper ions, and has the advantages of high utilization rate, good separation effect, low price and the like.

The invention discloses bentonite / modified zeolite compound super absorbent cat litter which comprises components of raw materials in percentage as follows: 50%-60% of sodium bentonite, 15%-25% of modified zeolite, 5%-8% of carboxymethylcellulose, 2%-4% of nanocarbon, 10%-15% of bran and 3%-5% of polyacrylamide. According to the cat litter, the zeolite is modified, so that the water-absorbing property of the zeolite can be remarkably improved; and then the bentonite, the nanocarbon and the bran are compounded, so that the cat litter is obtained, and the water-absorbing property and the deodorization function of the zeolite can be improved. After urine is absorbed, the cat litter can be put into a closestool and is pumped away; and the cat litter is convenient to use without polluting the environment.

The invention relates to a catalytic method for the transalkylation / dealkylation of organic compounds, consisting in bringing a supply comprising organic compounds into contact with a catalyst containing a first zeolitic component that is selected from among: a) one or more zeolites having crystalline structure ITQ-13; b) one or more zeolites having crystalline structure ITQ-13, which are modified either by means of selectivation or with the incorporation of one or more metals, or both; and c) a mixture of a) and b). The invention also relates to a catalyst comprising one or more modified zeolites having crystalline structure ITQ-13.

The invention relates to a slow release material using modified zeolite as a carrier, and a preparation method and application thereof. The slow release material is prepared from the following components in percentage by mass: 94-98% of modified zeolite, 1-3% of chitosan and 1-3% of acrylamide. The preparation method of modified zeolite comprises the following steps: treating natural zeolite at the high temperature of 200-400 DEG C for 1.5-3 hours, crushing, screening, and soaking with 0.5-2 mol / l hydrochloric acid for 0.5-2 hours to carry out framework dealuminization; and drying zeolite subjected to acid treatment, grinding with a powder device to obtain 200-300 mesh fine powder, thereby obtaining the modified zeolite. 1-3% of chitosan and 1-3% of acrylamide are added and evenly mixed with 94-98% of modified zeolite to obtain the slow release material. The slow release material can be added into a fertilizer to obtain the environment-friendly slow release fertilizer, wherein the slow release material accounts for 5-20% by mass of the fertilizer. The slow release fertilizer has the advantages of lower nutrient release rate in soil, long fertilizer effect period, and less pollution to the environment and water body, and has favorable functions of holding water, loosening soil, keeping soil from packing together and the like.

The invention relates to a preparation method of nano-iron modified zeolite, which comprises the steps of firstly mixing natural zeolite or artificially synthesized zeolite with an alkali solution so as to obtain hydrogel, or mixing natural zeolite or artificially synthesized zeolite with an alkali solution in a certain proportion through a silicon source and an aluminum source so as to obtain hydrogel; uniformly mixing the hydrogel with nano iron so as to obtain a modified zeolite synthesized material; crystallizing the modified zeolite synthesized material under appropriate conditions so as to obtain a nano-iron modified zeolite product. Compared with the existing zeolite, in the aspect of ammonia nitrogen adsorption, the adsorption capacity of the synthesized modified zeolite is greatly increased. The synthesized modified zeolite also can be applied to the technical field of catalytic cracking, sewage treatment, and the like.

The invention discloses a preparation method of acrolein, taking biological glycerol as the raw material and the modified zeolite supported heteropolyacid as catalyst, the method prepares acrolein directly by dehydration reaction. 18 to 30 catalyst are put in the middle section of a normal pressure continuous fixed bed reactor, with the volume space velocity of 1 to 10 h<-1>; under the protection of N2, the catalyst bed raises the temperature to 180 to 540 DEG C, and the biological glycerol solvent which is added with inhibitor is put into the fixed bed reactor from a micro pump; after gasified, the glycerine solution reacts by the catalyst bed. After reaction, the product is absorbed by acetone, then is separated and purified, thus obtaining acetone. The invention adopts the alkali metal, phosphoric oxides, alkali metal compound improved catalyst as carrier to carry heteropoly acid catalyst which is green and environmental catalyst and has the advantages of high activity, regeneration property, no pollution, simple reaction, operation process, low production cost, high mole selectivity of acrolein and high conversion rate of biological glycerol.

The current invention refers to the LNT and the SCR catalysts designed for combined LNT-SCR applications. LNT catalysts are based on proton-conducting oxides of fluorite structure, namely Ca (Sr)—La—Ce (Zr, Pr) mixed oxides in which up to 40 mol-% of lanthanum is replaced by calcium and / or strontium, and up to 66 mol-% of cerium is replaced by zirconium and / or praseodymium, further combined with Pt—Pd or Pt—Pd—Rh precious metal components. SCR catalysts are Cu / zeolite modified by citrate treatment or Cu—Ce, Mn—Ce or Co—Ce / modified zeolite.

The invention relates to an adsorbent for removing organic chlorides in a hydrocarbon-containing substance flow and a preparation method thereof. The adsorbent comprises a modified zeolite molecular sieve, an inorganic macroporous material and a clay component. The zinc ion-modified zeolite molecular sieve contained in the adsorbent shows remarkably high reaction activity on organic chlorides; compared with the prior art, the adsorbent has relatively high selective adsorption capacity on organic chlorides; moreover, with wide temperature range and low reaction activity, the adsorbent is suitable for removing at least one organic chloride from a hydrocarbon-containing substance flow containing hydrogen, hydrocarbons and chlorides, and particularly suitable for deeply removing organic chlorides in the oil generated by a catalytic reforming reaction as well as the byproduct hydrogen.