481results about "Molecular-sieve compounds" patented technology

The invention relates to a nanometer hole metal-organic frame material in a single-level or multilevel pore canal structure as well as a preparation method and the application thereof. The preparation method comprises the following steps: at least one metal salt and at least one polyfunctional group organic ligand reacts with at least one template agent in at least one solvent under the condition that no hole aid agent exists or only one hole aid agent exist, and single-level or multilevel nanometer holes or channels with the size of 0.5-100 nm exist in at least one direction in the internal space of the obtained metal-organic frame solid. The nanometer hole metal-organic frame material with large hole size and the nanometer hole metal-organic frame material in the layered multilevel pore canal structure can be obtained without the synthesis of the large-size organic ligand and have wide applications.

A nanoparticles-containing composite porous body according to the present invention includes a porous body having a solid skeleton and pores and nanoparticles of an inorganic substance. The nanoparticles are carried on the solid skeleton without coagulating together or being chemically bonded to the skeleton. The nanoparticles may be coated with organic aggregates and carried as composite particles on the solid skeleton. As the organic aggregates, spherical organic aggregates such as a spherical protein or a dendrimer are preferably used. Also, the organic aggregates may be decomposed and removed if necessary.

The invention belongs to the technical field of molecular sieve preparation, and particularly relates to an in-situ preparation method for a microporous-mesoporous molecular sieve containing noble metal. The in-situ preparation method comprises the steps as follows: adding a coupling pore-forming agent, a silicon source, an aluminum source or a titanium source, and an alkali source into a water solution of noble metal nano particles in sequence under the water bath condition; and ageing, drying, crystallizing, drying and carrying out high-temperature calcination to obtain the microporous-mesoporous molecular sieve containing the noble metal. The prepared microporous-mesoporous molecular sieve is provided with a hierarchical pore structure; the noble metal nano particles with high dispersity are covered in situ while a mesoporous structure is generated; and a synthetic method is convenient and simple, saves energy and reduces emission. A multifunctional catalyst prepared with the method integrates the advantages of the microporous channels of the molecular sieve, the transgranular meso pores and the intergranular meso pores of the molecular sieve and the noble metal nano particles, and is more suitable for catalytic reactions of sulfur-containing large molecules such as hydrogen desulfurization and the like.

Mesoscopically ordered, hydrothermally stable metal oxide-block copolymer composite or mesoporous materials are described herein that are formed by using amphiphilic block polymers which act as structure directing agents for the metal oxide in a self-assembling system.

The invention relates to a method for preparing a high silicon molecular sieve. The method comprises the following steps: circulating a molecular sieve along with inert carrier air under the carrying of inert carrier air flow and contacting the molecular sieve with gas-phase SiCl4 in a flowing sate, wherein the contact time of the molecular sieve and the gas-phase SiCl4 is from 10 seconds to 100 minutes. By using the method for preparing the high silicon molecular sieve in the invention, the continuous contact reaction of the molecular sieve and the SiCl4 can be achieved, and the contact time of the molecular sieve and the SiCl4 can be controlled through controlling the flow speed of the carrier air and the length of a tubular reactor, thus the contact reaction of the molecular sieve and the SiCl4 can be fully carried out in the tubular reactor.

A process for treating organic compounds includes providing a composition which includes a substantially mesoporous structure of silica containing at least 97% by volume of pores having a pore size ranging from about 15 Å to about 30 Å and having a micropore volume of at least about 0.01 cc/g, wherein the mesoporous structure has incorporated therewith at least about 0.02% by weight of at least one catalytically and/or chemically active heteroatom selected from the group consisting of Al, Ti, V, Cr, Zn, Fe, Sn, Mo, Ga, Ni, Co, In, Zr, Mn, Cu, Mg, Pd, Pt and W, and the catalyst has an X-ray diffraction pattern with one peak at 0.3° to about 3.5° at 2θ. The catalyst is contacted with an organic feed under reaction conditions wherein the treating process is selected from alkylation, acylation, oligomerization, selective oxidation, hydrotreating, isomerization, demetalation, catalytic dewaxing, hydroxylation, hydrogenation, ammoximation, isomerization, dehydrogenation, cracking and adsorption.

The TS-1 molecular sieve preparing process features that surfactant is added into the mother liquid for synthesizing the molecular sieve, so that most of the silicon source and titanium source after hydrolysis agglomerate into solid grains. After the solid grains are filtered out and crystallized, the filtrate containing small amount of residual silicon source and titanium source is used as the alkali source for hydrolyzing the newly added silicon source and titanium source for synthesizing the next batch of molecular sieve. The process has greatly reduced environmental pollution, lowered preparation cost and raised synthesizing efficiency and benefit.

The present invention relates to a synthesis method of Ti-MWW molecular sieve. Said method includes the following steps: uniformly mixing silicon source, titanium source, boron source, template agent, fluorine source and water to obtain colloidal material, them making hydrothermal crystallization so as to obtain Ti-MWW molecular sieve raw material powder, making said raw material powder reacte with acidic solution, roasting so as to obtain the Ti-MWW molecular sieve.

The invention discloses a preparation method of nanometer molecular sieve. The method is to firstly mix hydrocarbon components and surfactants evenly, then add silica gel and silica-alumina gel, and continue to stir until the raw materials are evenly mixed to obtain a super-solubilizing system of oil-in-melt, and then undergo crystallization, drying and roasting Finally, nano molecular sieves are obtained. The crystallization of the molecular sieve in the present invention is carried out in a supersolubilized micelle system of molten silica gel or silica-alumina gel in oil, and the growth of the molecular sieve crystal is limited in the nano-micelle to avoid excessive growth of the molecular sieve crystal. The surfactant and hydrocarbon components used in the method of the invention are used in small amounts and low in cost. The method has a simple process and can be used for large-scale industrial production.

A mesoporous oxide composition includes, other than oxygen, a major amount of aluminum and lesser amounts of phosphorus and at least one rare earth element. The compositions have high surface area and excellent thermal and hydrothermal stability, with a relatively narrow pore size distribution in the mesoporous range. These compositions may be prepared by a hydrothermal co-precipitation method using an organic templating agent. These mesoporous oxide compositions may be used as catalysts or as supports for catalysts, for example, in a fluid catalytic cracking process.

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.

Provided herein are composites made up of open frameworks encapsulating sulfur, silicon and tin, and mechanochemical methods of producing such composites. Such open frameworks may include metal-organic frameworks (MOFs), including for example zeolitic imidazolate frameworks (ZIFs), and covalent organic frameworks (COFs). Such composites may be suitable for use as electrode materials, or more specifically for use in batteries. For example, sulfur composites may be used as cathode materials in Li-ion batteries; and silicon or tin composites may be used as anode materials in Li-ion batteries.

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.

A porous inorganic membrane comprises at least one inorganic phase having separating properties. Said membrane has a carbon content representing 0.05% to 25% by weight with respect to the mass of said inorganic phase and is selective to non-condensable gases. It is obtained by means of a selectivation treatment of a porous carbon-free inorganic membrane using a hydrocarbon feed. It is used in processes for separating non-condensable molecules such as hydrogen, and in association with a catalyst in a catalytic membrane reactor.

The invention provides a method for removing nitrogen and phosphorus in sewage by zeolite synthesized by coal ash. Low-calcium coal ash and high-calcium coal ash are respectively used as raw materials so as to synthesize zeolite with different removing effects by alkali fusion method. The zeolite synthesized by the low-calcium coal ash is adopted for processing ammonia nitrogen-contained sewage, the zeolite synthesized by the high-calcium coal ash is adopted for processing phosphorus-contained sewage, and the zeolite synthesized by the low-calcium ash coal and high-calcium ash coal with different mixing ratios is adopted for processing mixture sewage with different nitrogen and phosphorus ratios. In the invention, the prepared zeolite has high purity, different types of zeolite can be adopted according to sewage properties, the pollutant absorbing amount is large, and the solid adding amount in the practical application is reduced effectively. After absorbing nitrogen and phosphorus, the sludge can be used as fertilizer, so that not only the environmental pollution problems caused by waste solid coal ash, nitrogen and phosphorus in sewage and the like are solved, but also the reclamation in the pollutant is realized. According to the technology, the operation is simple, the running cost is low, and the method can be applied to industrial point source, plane source and nitrogen and phosphorus treatment in tail water of sewage treatment plants in cities and towns.

Methods for coating a substrate with a coating including an adsorbent material and a binder comprising an organosilica material which is a polymer comprising independent units of Formula [Z³Z⁴SiCH₂]₃ (I), wherein each Z³ represents a hydroxyl group, a C₁-C₄ alkoxy group or an oxygen atom bonded to a silicon atom of another unit or an active site on the substrate and each Z⁴ represents a hydroxyl group, a C₁-C₄ alkoxy group, a C₁-C₄ alkyl group, an oxygen atom bonded to a silicon atom of another unit or an active site on the substrate are provided. Methods of gas separation are also provided.

The invention relates to a method for producing an adsorbent from organometallic framework structures (MOF), in which at least one metal salt is converted together with at least one organic ligand. The conversion occurs at a temperature of greater than 100 degrees centigrade in a solvent mixture which contains DMSO and water. The invention further relates to an absorbent produced by means of the method according to the invention and to a substrate coated with such an absorbent and application possibilities of such an absorbent or substrate.

The present invention relates to vertically oriented LDHs film in nanometer and micron composite structure and its preparation process. By means of in-situ synthesis technology, and using aluminum sheet through surface anode oxidation as substrate and Al3+ source, and through dropping ammonia water to regulate the pH value of the reaction solution, reacting bivalent metal ion M2+ inside solution and ammonium nitrate in alkaline condition to produce metal complex ion to control the slow release of M2+ and the nucleation rate of LDHs on the substrate, the present invention grows oriented LDHs film with crystal face perpendicular to the substrate surface or (00l) direction and controllable density. The present invention is superior to available method, which has poor LDHs crystal orientation and other problems.

An oxygen reduction electrode, e.g., an air cathode, comprising manganese oxides having octahedral molecular sieve structures as active catalyst materials and use of such an electrode as a component of a metal-air cell.