94results about How to "Activity does not decrease" patented technology

The invention provides a method for preparing cyclopentanone and/or cyclopentanol by furfural or furfuryl alcohol. The method includes the following steps of firstly, mixing furfural or furfuryl alcohol with solvent according to proportion; secondly, adding catalyst with hydrogenating function into the mixture in the first step; and thirdly, reacting in the reducing atmosphere to obtain cyclopentanone and/or cyclopentanol. The method for preparing cyclopentanone and/or cyclopentanol by furfural or furfural alcohol is high in yield of the cyclopentanone and/or cyclopentanol, and further, is simple in process, convenient to operate, mild in reaction conditions, no carbon deposition is caused during the whole reaction, the catalyst is low in cost and easy to obtain and can be reused without lowering activity.

The invention discloses a ruthenium system ammonia synthesis catalyst using a graphitization activated carbon as a carrier and a preparation method of the catalyst. The ruthenium system ammonia synthesis catalyst is as shown in Ru-X-K/AC, wherein Ru represents that a precursor is a water-soluble chloride-free ruthenium complex or ruthenium chloride; X represents a metal adjuvant and is one or more of nitrate, acetate, carbonate, metallic oxide and hydroxide of rare-earth metal or alkaline-earth metal; AC represents a graphitization activated carbon carrier, and K represents a kalium adjuvant, namely potassium hydroxide, potassium nitrate, potassium acetate and potassium carbonate; the graphitization activated carbon which has the advantages of high specific surface area, high graphitization and low oxygen content is utilized as the carrier, and the ammonia synthesis catalyst is prepared through steps such as secondary graphitization of graphitization activated carbon, preparation of precursor and preparation of catalyst. The ruthenium system ammonia synthesis catalyst has the advantages that the graphitization activated carbon has large specific surface area and pore volume, enough place is provided for metal segregation, the graphitization degree is high, the oxygen content is low, the methanation resisting capacity of the catalyst is strong, and the stability is good.

The invention relates to a bursin extracting method and its application to curing disease and immunity, having important value in application in the aspects of heightening organismal immunity and acting as immunoenhancer, heightening effect of vaccine, etc., and able to heighten body fluid and cell immune functions of mammal at the same time. It can be used to prevent and cure infectious diseases and young animal diseases singly or together with other drugs such as antivirus and antibacterial drugs or immunomodulators, also be applied to animal vaccine as adjuvant or immunoenhancer to strengthen the disease-resistant ability and immunoresponse ability to peculiar antigens, thus heightening the immune effect.

The invention belongs to a chemical technology and the technical field of a renewable energy source, and relates to a method for producing second-generation biodiesel by hydrogenation production of illegal cooking oil. The method comprises the following steps: firstly, carrying out pretreatments such as filtering, dewatering and desalting, on the collected illegal cooking oil; respectively carrying out reaction, such as hydrodeoxygenation, hydrogenation decarboxylation and hydrogenation decarbonylation, in the presence of a transition metal phosphide catalyst so as to obtain the second-generation biodiesel. By adopting the method, the noble metal property and excellent hydrogenation performance of the transition metal phosphide are fully utilized, the illegal cooking oil is directly converted into oxygen-free fat alkanes, no byproduct for polluting the environment is generated, meanwhile, the method has the advantages of simple process, is clean and environmental, low in energy consumption and the like, the obtained diesel is high in cetane number and low in condensation point, has good economic and social benefits, and has important practical significance on growing fuel requirements.

This invention relates to cell fixed microbial preparation, which is a kind of producing method for surface water repair immobilized particles. 1)adding active carbon ,zeolite powder or kieselguhr to premixed PVA-Naí»Alg gel solution, , as well as yeast extract paste; 2)adding gel solution with thallus seed solution,

The invention relates to a preparation method of epoxy silane oligomer and belongs to the field of preparation of polymer organic materials. Epoxy silane and a solvent are added to a flask; after the flask is heated to 40-42 DEG C, a catalyst is dissolved in distilled water, the solution is slowly dropwise added by the aid of a constant-pressure funnel, the mixture reacts at the constant temperature for 0.8-1.2 h, the solvent and alcohol produced through hydrolysis are removed through heating under the normal pressure; a crude product of epoxy silane oligomer is obtained, filtration is performed with a conventional method for precipitation of the catalyst, and a finished product of epoxy silane oligomer is obtained. The prepared organopolysiloxane has the advantages of being colorless, transparent, high impurity, low in volatility, low in VOC emission, convenient to use, environment-friendly and the like. Meanwhile, the used catalyst can be separated through filtration after the reaction and can be reused without activity decrease.

The invention discloses a modified lectin wrapped magnetic macromolecular liposome nano microsphere, a preparation method and an application. The lectin wrapped magnetic macromolecular liposome nano microsphere is macromolecular liposome with a double membrane structure, which is formed by wrapping a magnetic nano particle with modified lectin and lipid after forming a lipid membrane. Different from the traditional magnetic nano microsphere surface grafting modification, the magnetic liposome directly employs a derivative of the active substance lectin, lentil lectin-hexadecyl quaternary ammonium salt to wrap the magnetic nano particle, and the method can control a lectin content of the surface of the magnetic sphere and increase the content of the active substance such as the lectin. The lectin wrapped magnetic macromolecular liposome is applicable to the fields of magnetic resonance imaging (MRI), magnetic marking, magnetic rapid diagnosis, controlled medicine release, genetic vectors, magnetic high-temperature therapy, immunomagnetic microspheres and the like.

The invention discloses the catalytic cleaning method of trichloroethylene. The method comprises the following steps: insufflating the humid air into waste gas containing trichloroethylene to carry out reaction at the existence of catalyst which is composed by carrier, rare metal, rare earth oxide and phosphorus acid; at humid air and low temperature, the trichloroethylene changed to carbon dioxide and hydrochloride, and the catalyst keeping active. The precious metal content in catalyst is few, and there is not polychlorocarbon byproduct, so the method is effective and environmental conservation.

The present invention relates to a ruthenium titanium zirconium catalyst obtained by catalytic combustion of dichloromethane and a preparation method thereof. The preparation process of the catalyst comprises the following steps: according to a general formula TixZr10-x, wherein x is 0-10, using Ti(SO4)2 and ZrOCl2.8H2O as a precursor and ammoniacal liquor as a precipitating agent, using a coprecipitation method to prepare a catalyst carrier, and then using an immersion method for loading RuO2 with mass ratio being 1% to obtain the finished product catalyst. The catalyst is used for catalytic combustion of dichloromethane, air is taken as an oxidizing agent, ignition temperature is low, completing combustion temperature is low, and dichloromethane can be completely combusted at temperature of 280 DEG C. The catalyst has high stability, and can be kept for 10 hours at temperature of 280 DEG C without inactivation. The preparation method is simple and is easy to operate, and the prepared catalyst has activity and stability.

The invention discloses an aluminum-plated metal carrier dehydrogenation catalyst and a preparation method thereof, which belong to the field of catalyst applications. The catalyst consist of a metal carrier layer, a gamma-Al2O3 porous material layer and a catalyst layer, wherein the metal carrier layer is made of an aluminum-plated steel plate or aluminum-plated alloy; and the catalyst layer consists of a precious metal and/or aid with catalytic activity. The preparation method comprises the following steps of: cleaning and drying the metal carrier layer; completely converting an aluminum-plated layer into Al2O3 through anodic oxidation; corroding and broaching; coating or dipping a layer of active Al2O3 on the surface of the broached Al2O3; drying and sintering to obtain a gamma-Al2O3 porous material layer; coating or dipping a catalyst layer; and drying, baking and reducing to obtain the aluminum-plated metal carrier dehydrogenation catalyst. In the catalyst, the bonding strength between the catalyst layer and the metal carrier is high, and the activity of the catalyst layer is high; and the preparation method is simple, and is low in cost.

The invention discloses a sintering desulfurization ash treatment system and method. The sintering desulfurization ash treatment method comprises the following steps that: a high temperature liquid slag iron mixture is discharged into a stokehole slag iron ditch from a furnace to achieve slag and iron separation in the production process of an iron smelting blast furnace, and blast furnace liquid slag flows through a slag ditch to be water-quenched to produce water slag; and when the blast furnace liquid slag flows through the slag ditch, sintering desulfurization ash comprising main components of CaSO3 and CaSO4 is added to the liquid slag in the slag ditch to be oxidized and melted into the liquid slag, and blast furnace water slag is obtained by water quenching treatment. The desulfurization ash difficult to treat generated by sintering desulfurization in production is subjected to high-temperature oxidization and water quenching to generate a similar material of slag powder, and the activity of slag power is not reduced; the similar material of the slag powder conforms to the requirement of national standard in which the chlorine ion content is less than 0.06%, the desulfurization ash is recycled, the environmental pollution is reduced, the resource is saved, and the environment-friendly effect is achieved.

The invention discloses a method for extraction of colistin sulphate. The method comprises the following steps of 1, a fermentation broth preparation process comprising adjusting a pH value to 4.0 by sulfuric acid, 2, a ceramic membrane filtration process comprising filtering the fermentation broth by a ceramic membrane, collecting a filtrate, and adjusting a pH value of the filtrate to 4.5-5, 3, a continuous moving bed absorption-desorption process, wherein through the continuous moving bed absorption-desorption process, a discharged liquid is obtained, 4, a discharged liquid decoloration process, 5, a nanofiltration concentration process, wherein in the nanofiltration concentration process, nanofiltration membrane pore sizes are in a range of 2100-400Da molecular weight cut-off and 10-20 times concentration is realized, and 6 a spray drying process. The method has a total colistin sulphate yield of 86 to 91% and has good energy-saving and emission-reduction effects.

The invention provides a method for preparing alkane fuels through lignin. The method includes the following steps: a, mixing the lignin, a hydrogen peroxide solution and a solvent in proportion, reacting at a certain temperature, and collecting liquid products; and b, adding a metal catalyst into the liquid products obtained in the step a and obtaining alkane with the composition of C6-C9 through reduction reaction in a reducing atmosphere. According to the method, the alkane fuels are prepared by the lignin through two steps including hydrogen peroxide oxidation and catalytic hydrogenation reduction, the reaction condition is mild, the conversion rate and yield are high, the preparation process is simple, and the method is convenient to operate. According to the technical scheme, a novel way for preparing the alkane fuels through the non-fossil lignin, and a quite bright application prospect is provided.

A trigger for stimulating the early-phase activity of the blast furnace slag powder or the mixture of blast furnace slag powder and cinder powder is proportionally prepared from triethanolamine and early strengthening agent (calcined gypsum or bihydrated gypsum or potassium chromium sulfate).

The invention discloses a process for preparing 4, 6-diamino resorcinol comprising the steps of, subjecting 4,6-dinitro-2-chlorin-1,3-dihydroxy benzene to catalytic hydrogenation with hydrogen under normal or medium pressure at normal temperature or heating condition, in organic solvent and at the presence of rare metals and transient metallic oxide catalyst, then collecting 4,6-diamino resorcinol from the reactant through the conventional methods.

The invention discloses a preparation method of a palladium-based polyaniline coated carbon nanotube nano catalyst, wherein the preparation method mainly includes the following steps: purification ofa carbon nanotube (CNT); preparation of a polyaniline (PANI) coated carbon nanotube (PANI@CNT); and preparation of the Pd/PANI@CNT catalyst. The polyaniline coated carbon nanotube is used, and Pd nanoparticles are loaded on the surface of the PANI@CNT; the formed nano catalyst Pd/PANI@CNT has a quite good reuse performance in a Heck reaction; after reaction is carried out for 10 times, the activity is not reduced. In the prepared Pd/PANI@CNT, a large number of nitrogen-containing functional groups form coordination bonds with Pd, the bonds are quite stable and effectively inhibit the loss andagglomeration of Pd nanoparticles, and thus the cost of the catalyst is effectively reduced. In addition, the catalyst can be effectively recovered and separated, and the contamination and repurification process of the product is prevented.

The invention relates to the technical field of biology, and in particular provides a freeze-drying protective agent of a reagent for PCR amplification, a product as well as a preparation method and application of the reagent. The freeze-drying protecting agent of the reagent for PCR amplification comprises trehalose, hydroxypropyl-beta-cyclodextrin, inulin and carrageenan. The freeze-drying protecting agent can significantly prolong the validity period of the reagent for PCR amplification, and at the same time can effectively reduce the possibility of aerosol formation of the PCR amplification reaction system during use, and improve the sensitivity and accuracy of PCR.

The preparation process of 4, 6-diamino resorcinol hydrochloride includes the following steps: dissolving 4, 6-dinitro-2-chloro-1, 3-dihydroxy benzene in water to form water solution, adding dechloronating promoter, and reaction with hydrogen in the presence of rare metal and transition metal catalyst. The process is one economic process with high yield and high quality of 4, 6-diamino resorcinol hydrochloride, with the yield reaching 99 %, and has easy treatment of the reaction waste water. Therefore, the process of the present invention has excellent industrial production application foreground.

The double metal complex catalyst (DMC) consists of Zn3[Co(CN)6]2íñaZnC12íñbH2Oíñc organic small molecular double-alcohol ligand and macro molecular nitric propyl dine ligand. The double alcohol is one of tert-butyl alcohol-tert-propyl alcohol, tert-butyl alcohol-tert-amyl alcohol, tert-butyl alcoho-n-butyl alcohol, tert-butyl alcohol-benzyl alcohol, etc. The double metal complex catalyst product has high activity, high stability, low consumption and long storage life over two years. The double metal complex catalyst is used in synthesizing poly(ether polyol) with great molecular weight, low unsaturation degree and relatively narrow molecular weight distribution, and it is one ideal material for preparing high performance polyurethane.

The invention provides a high-effective concrete water reducing agent and relates to the field of building materials. The water reducing agent includes, by weight, 40-60 parts of a modified polycarboxylate water reducing agent, 30-50 parts of propyl sulfonic acid cellulose, 20-35 parts of a melamine sulfonate formaldehyde condensate, 10-20 parts of calcium lignosulphonate, 5-15 parts of cocoyl glutamic acid disodium, 3-8 parts of guar gum, 0.3-1.5 parts of sodium nitrite, 10-20 parts of volcanic ash, 10-20 parts of calcium hydroxide powder, 4-10 parts of acetone, 50-80 parts of water and 4-8 parts of an additive. The water reducing agent has good slump loss resistance, is low in influence on cement cementing time, and solves the problems of water reduction, air entraining, coagulation retarding and water bleeding, is low in cost and is free of environment pollution.