1669results about How to "Stable physical and chemical properties" patented technology

The invention discloses a mixed plant culture medium and a preparation method thereof. The culture medium comprises peat and an agricultural and forest residue compositing fermentation medium, wherein the volume proportion of peat to agricultural and forest residue compositing fermentation medium is (30-50):(50-70). The mixed culture medium prepared by the method in the invention has the advantages of balanced nutrition, high nutrition component contents and stable physical property. The mixed culture medium prepared by the method in the invention is reasonable in nutrition structure and convenient for absorption of foliage plants and meets the growth requirement of the foliage plants, thereby improving the culture survival rate and viewing effect of the foliage plants.

The invention provides a composite phase-change thermal storage material. A porous material with high thermal conductivity is used as a supporting framework, and low-melting-point metal or low-melting-point metal with nano-particles is distributed in pores of the porous material, wherein melting point or solidus temperature of the low-melting-point metal is less than or equal to 80 DEG C; and thermal conductivity of the porous material is within 40-400 W / (m.K). The material provided by the invention has high equivalent thermal conductivity and high storage energy density; there is a large contact area between the liquid metal and the porous material; and the material has a wide application temperature range, has good fixability, stable physico-chemical property and good reversibility; and the problem of decreasing heat storage efficiency after multiple times of heat adsorption and release cycles is avoided.

The invention provides a microsphere embolic agent, which is an elastic microsphere formed by the crosslink polymer of the functionalized macromolecules with the biocompatibility, and the particle size of the microsphere ranges from 1 Mum to 1500 Mum. The preparing technology includes the steps as follows: in a covalent link, linking a crosslinkable micromolecules with an acrylic acid structure on the polyvinyl alcohol, polyethylene glycol or polysaccharide macromolecules, forming the functionalized macromolecules; after that, the functionalized macromolecules and the monomer of the 2- acrylamide-2-methyl propanesulfonic acid undertakes opposite suspension polymerization, obtaining the crosslink polymeric microsphere embolic agent. The embolic agent has comparatively large retractility and elasticity, whose particle size is controllable and has perfect dispersiveness; moreover, the raw material is non-toxic and at the same time has good biocompatibility and stability. The preparing technology is a real chemosynthesis technology, whose material and preparing process does not produce any virus pollution, according with various requirements of the international embolic agent, which can replace various import and domestic expensive embolic agent products and is extensively applicable to various surgeries in the interventional radiology field.

The invention relates to an ultrahigh-strength grouting material based on iron tailing sand and cement and a preparation method of the grouting material. The ultrahigh-strength grouting material is composed of the following components in proportion by weight: 30%-45% of cement, 45%-55% of iron tailing sand, 6%-15% of multielement mineral admixtures, 0.35%-1% of water reducing agent, 0.1%-1% of plastic retaining agent, 0.01%-0.1% of plastic expanding agent, and 2%-6% of shrinkage-compensating expanding agent. The preparation method comprises the steps of uniformly mixing all the components and then uniformly stirring the mixed components in water, wherein the ratio of the water to the materials is 0.09-0.11. The grouting material is good in flowability, is good in stability in a plastic stage, is free from shrinkage in the whole course from the plastic stage to a later hardening stage, and is ultrahigh in early strength, final strength and elasticity modulus, the 1d compressive strength of the material reaches up to 50MPa, the 28d compressive strength of the material can exceed 110MPa, and the 28d elasticity modulus of the material exceeds 45GPa, and therefore, the ultrahigh-strength grouting material is suitable for grouting of various important parts or areas with requirements on high strength and high modulus.

The invention discloses technology of preparing aluminium oxide based continuous fibers by a sol-gel process, which is characterized by adding one or more organic acid containing 1-8 carbon atoms into distilled water, adding aluminum powder and a catalyst after the mixture is evenly mixed and ensuring the mixture to react under the conditions of continuous stirring and reflux condensation under certain temperature to obtain transparent aluminum carboxylate solution; evaporating redundant organic acid in the aluminum carboxylate solution and then adding a solvent, a silicon-containing additive and a given quantity of spinning assistants to obtain precursor solution of aluminium oxide based fibers; concentrating the solution to obtain precursor sol of spinnable aluminium oxide based fibers; spinning by a dry or wet method to obtain aluminium oxide based continuous precursor fibers containing organics; and drying and sintering the precursor fibers to obtain the aluminium oxide based fibers. The aluminium oxide based continuous fibers prepared by the technology can be used in reinforcement in the composite, further improve the strength, ductility and heat resistance of the material and are widely applied in the fields of aerospace, automobile and the like.

The invention relates to a method for extracting high-purity squalene by taking olive oil as a raw material. A technological route formed by adopting a secondary molecular distillation and silica gel column chromatography is as follows: an olive oil unsaponifiable substance is taken, squalene is separated and purified by using two stages of molecular distillation, primary molecular distillation is carried out under the conditions of the evaporation surface temperature of 100 to 200 DEG C, the systemic pressure of 0.001 to 0.01mbar and the scraping film rotor speed of 150 to 300rpm, and secondary molecular distillation is carried out to the obtained distillate; the secondary molecular distillation is carried out under the conditions of the evaporation surface temperature of 150 to 300 DEG C, the systemic pressure of 0.001 to 0.01mbar and the scraping film rotor speed of 200 to 350rpm, and the obtained distillate is a squalene crude product; ethyl acetate-normal hexane with different concentrations is used as a mobile phase to carry out gradient elution, the obtained eluent is collected according to time and a solvent is evaporated, the same fractions are merged through chromatographic detection, and the high-purity squalene can be obtained, wherein the content of the raw material olive oil of the squalene is enhanced from 3.6% to about 98%; and especially, by considering the requirement of industrialized production to select an extraction condition especially, the large-scale production of the squalene taking the olive oil as the raw material can be realized.

The invention relates to a glass composition for absorbing ultraviolet ray and infrared ray, which comprises a glass basic composition (weight ratio): 60-75% of SiO2, 8-20% of Na2O, 3-12% of CaO, 0.1-5% of Al2O3, 2-5% of MgO; 0.02-7% of K2O, 0.1-5% of BaO and 0.01-0.4% of SO3; and a glass body coloring coordination part for absorbing ultraviolet ray and infrared ray: 0.22-1.35% of Fe2O3, 0.001-0.8% of ZrO2+HfO2, 0-0.5% of Cl, 0-2% of B2O3, 0.01-0.8% of TiO2, 0.001-0.06% of CuO; 0-2.0% of Br, 0-0.02% of MnO, 0-2.0% of F, 0.001-0.5% of Sr and 0.005-2.2% of CeO2. The redox ratio of Fe2O3 in the glass composition is 0.4-0.8. Rare metals and rare earth metal compound with a certain amount can be added in the glass composition, limitation of the current heat insulation glass can be breakthrough, chemical oxygen demand of the raw materials and the redox ratio can be controlled in a reasonable mode, obstruction to ultraviolet ray, infrared ray and total energy can be effectively realized, visible light transmittance is simultaneously increased, so that heat insulation glass capable of strongly absorbing the ultraviolet ray and near infrared can be obtained.

The invention relates to an inorganic composite heat insulation material, which is prepared from the following raw materials in part by weight: 100 parts of common silicate cement, 10 to 30 parts of quick hardening sulfate aluminum cement, 10 to 30 parts of gypsum powder, 10 to 40 parts of admixture, 20 to 40 parts of mineral fiber, 150 to 200 parts of vitrified micro bubbles, 4 to 8 parts of re-dispersible latex powder, 2 to 4 parts of cellulose ether, 0.1 to 0.3 part of starch ether, 0.2 to 1.0 part of water reducing agent, 0.2 to 0.6 part of retarder, 1 to 3 parts of early strength agent, 0.5 to 3 parts of water repellent, and 0.02 to 0.06 part of air entraining agent. The raw materials are mixed uniformly to prepare dry powder, and the dry powder and water are mixed in a weight ratio of 1: (0.8-1.2) and stirred to form slurry for use. The inorganic composite heat insulation material has good workability, quick strength development, high construction efficiency, good adhesive property, low drying shrinkage, heat insulation, hydrophobic property, fire resistance and durability.

The present invention relates to poisonous waste treating method and apparatus, and belongs to the field of waste treating technology. The poisonous waste treating apparatus is plasma apparatus comprising a furnace body, a main graphite electrode and an auxiliary graphite electrode connected to the cover of the furnace body, carrier gas supplier connected to the main graphite electrode, a feeder, a vitreous body exhausting heat pump, a metal melt heat pump, a crucible inside the furnace body, a lower electrode in the bottom of the furnace body, a liquid level sensor connected to the sensor controller, and a tail gas exhausting system connected to the furnace body. It is used in treating polychlorinated biphenyl and other high dangerous waste through instantaneous high temperature, and has no secondary pollution, capacity of recovering high energy gas, and capacity of recovering metals.

The invention discloses an asphalt recycling agent for hot recycling of asphalt on an asphalt road surface. The recycling agent comprises the following components by weight: 19-70% of an aromatic oil, 20-60% of heavy oil, 5-30% of liquid petroleum resin and 0.2-1% of a stabilizer. The invention also provides a preparation process of the asphalt recycling agent and a method for preparing recycled asphalt by use of the asphalt recycling agent. The recycling agent disclosed by the invention is good in recycling effect, easy for raw materials purchase, stable in quality, low in equipment investment, simple in processing steps, short in processing time of finished products, good in storage stability, stable in physicochemical property, and convenient for on-site operation, and is suitable for on-site hot recycling construction as a special recycling agent.

The invention discloses a magnetic carrier iron ordered mesoporous carbon. The ordered mesoporous carbon is taken as a carrier, the carrier is prepared by a hard template method, and magnetic nanoparticles are loaded onto the carrier by a nano-joint casting method; the magnetic nanoparticles mainly consist of zero-valent iron and oxide of iron, wherein the proportion of the iron element is taken as 1-1.5m mol of each gram of a mesoporous silicon template, and the pore diameter distribution of the mesoporous carbon is mainly concentrated nearby 5nm and 3.8nm. A perpetration method of the magnetic carrier iron ordered mesoporous carbon provided by the invention comprises the following steps of: dissolving iron source materials and cane sugar in sulfuric acid, dipping the mesoporous silicon template, and adopting two-section type heat treatment; secondly, dipping by cane sugar-containing sulfuric acid solution, and adopting two-section type heat treatment; and finally carrying out constant-temperature high-temperature carbonization so as to obtain the silicon template in a demoulding way by hot NaOH solution, and drying to obtain the magnetic carrier iron ordered mesoporous carbon. The magnetic carrier iron ordered mesoporous carbon disclosed by the invention has the characteristics of being large in specific surface area and pore volume, wide in application range, stable in physicochemical property and the like, and the heavy metal hexavalent chromium ions in water body can be removed.

The invention relates to a novel passive targeting nano emulsion with skin whitening effect and a preparation method thereof. The invention uses a novel passive targeting transdermal delivery dosing system TDDS-nano emulsion as a carrier of a function component for whitening or lighting the skin, uses different physical and chemical properties, action mechanism and actual effect of each skin whitening function component, especially the action advantages of certain novel skin whitening function components, and provides skin whitening effect nano emulsion systems with two joint applications in morning and evening matched with each other. The two joint applied nano emulsion systems not only have minimum spherical grains, extremely even distribution of nano-scale grains, remarkable passive targeting function, good transdermal absorption and strong penetrability, but also have extremely even, exquisite, smooth and glossy texture of the nano emulsion, is quite comfortable after coating on the face or the skin, has no stimulus and good stability; and the nano is light yellow, beautiful in appearance, bright and transparent, clear and crystalline, has light opalescence, and is adhesive but not sticky, thick but not heavy, oily but not greasy.

The invention relates to a method for recovering zirconia and yttria from the yttria-stabilized zirconia solid solution waste, which comprises the following steps: mixing the solid solution waste powder, sulfate and salt; acidizing and calcining at 200 to 320 DEG C; leaching the acidizing water and / or mother liquor under self-heating conditions; concentrating the leaching solution to leach zirconium sulfate; dissolving the zirconium sulfate in the water and purifying; neutralizing the zirconium hydroxide with alkali and precipitating; calcining the zirconium hydroxide to obtain zirconia; precipitating zirconium mother liquor to produce by-product of ammonium sulfate; neutralizing yttrium rich mother liquor and precipitating to obtain yttrium; dissolving yttrium rich residue with acid and purifying; precipitating oxalate to obtain yttrium oxalate; calcining to obtain the yttria. The method has the advantages of effectively separating the yttria from the zirconia in stable zirconia solid solution waste with optional yttrium ion under low temperature condition, changing the zirconia solid solution waste into valuables and utilizing the resources.

The invention discloses a method for preparing a polyvinylidene fluoride affinity membrane using amino acid as a ligand. The affinity membrane is prepared by hydrophilically modifying a polyvinylidene fluoride hollow fiber membrane and grafting the amino acid ligand. The grafting amount of the amino acid is 150 to 250mg / g for each membrane. The invention also discloses application of the affinity membrane in removing endotoxin in blood plasma, which removes the endotoxin in the blood plasma by a dynamic absorption means. The polyvinylidene fluoride affinity membrane prepared by the method has stable performance, good bio-compatibility and high endotoxin removing efficiency, and can be used for whole blood perfusion as well as blood plasma perfusion.

The invention relates to a hyaluronic-acid-based double-targeting nano-composite medicament and a preparation method thereof. Hydrophobic group ursodeoxycholic acid is included in a hyaluronic acid nano-polymer structure and can form an amphipathic polymer and automatically generate micelles in an aqueous solution, and polyethylene glycol can be introduced into the micelles to improve the dispersity and stability of a composite. An anti-tumor medicament can enter a nano-carrier through electrostatic adsorption or physical inclusion to generate a nano-medicament composite, wherein the nano-medicament composite is selectively concentrated in a tumor cell under an active targeting effect of hyaluronic acid and a surface CD44 receptor of a tumor cell, and promotes a tumor tissue to absorb the nano medicament-carrying composite by using a passive osmotic accumulation effect (EPR) at the same time. After an anti-tumor medicament is wrapped by a modified hyaluronic acid polymer, the anti-tumor medicament has the advantages of improving the bioavailability of the medicament, improving the targeting property, reducing the toxic and side effects, prolonging the half-life period of the medicament, being stably stored and the like, so that the tumor targeting therapy efficiency is improved in many ways.

The invention relates to a water swelling polyurethane elastomer sealing product material and a preparation method. The material is prepared from the following three components (A), (B) and (C) through polymerization reaction of two steps, the elastomer material has water swelling property, and a main chain structure of material molecules absorbs water, wherein the (A) is hydrophilic polyether type polymer1polyol; the (B) is polyisocyanates; and the (C) is low-molecular polyol and amino chain-extended crosslinker. The molar ratio of the (B) to the (A) in an isocyanate end capping reaction is 1.3 to 2.8; and the molar ratio of a product of the isocyanate end capping reaction of the (A) and the (B) to the (C) in a chain-extended crosslinking reaction is 0.75 to 1.05. In the preparation method for the material, the reaction of the two steps is a reaction process of liquid polymerization, and the production of a product is an elastomer casting-molding process. The material has the characteristics of small mass variation rate and stable physical performance after the material absorbs the water repeatedly to swell, and permanent compression deformation and small stress relaxation.

The invention discloses a circulation tumor cell automatic separation and purification micro-fluidic chip and a separation and purification method thereof. The circulation tumor cell automatic separation and purification micro-fluidic chip comprises a separation and purification chamber, a diversion column and micro columns, wherein a sample inlet, a first outlet from which target cells flow out, and a plurality of second outlets from which non-target cells flow out are formed in the separation and purification chamber; the separation and purification chamber is internally provided with two micro column arrays; each micro column array consists of a plurality of micro column rows; each micro column row comprises a plurality of micro columns; a gap is formed between every two adjacent micro columns of one micro column row; the gap forms a non-target cell channel; a gap is formed between two micro column arrays; the gap forms a target cell channel from which the target cells pass; the width of the target cell channel is greater than that of the non-target cell channel; an acute angle is formed between the micro column rows and the target cell channel; and the acute angle faces to the sample inlet. The circulation tumor cell automatic separation and purification micro-fluidic chip is high in separation and purification degree.

The invention relates to a hollow fiber ultrafiltration composite membrane composed of the components in the following weight percent: 15-25% of membrane material, 5-15% of pore-making agent, 55-75% of organic solvent and 5-10% of lithium chloride; the membrane material is a mixture of chitosan and one of polysulfone, polyether sulfone, polyacrylonitrile, polymethyl methacrylate, or cellulose triacetate, wherein the chitosan accounts for 1-5% of the total weight of the raw material, and the average molecular weight of chitosan ranges from 300,000 to 1,000,000; the pore-making agent is one of polyvinylpyrrolidone, polyethyleneglycol, or polyvinyl alcohol, or a mixture thereof; and the organic solvent is one of N-methyl-2-pyrrolidone, dimethyl fomamide, dimethyl acetamide, or dimethyl sulfoxide. The invention has good bioactivity, biocompatibility, anti-coagulation property and other properties.

The invention relates to a fire-proof and thermal-insulation board and a manufacturing method thereof, and belongs to the technical field of constructional materials. According to the manufacturing method of the fire-proof and thermal-insulation board, modified phenolic resin, reinforcing fibers and inorganic micro bead thermal insulation fillings with the weight ratio of 1:(0-0.05):(0.3-1) are prepared; and after the steps of preparing adhesive, preparing a mixture, foaming, forming and solidifying to form are finished, a foam board is subjected to thermal insulation to be formed, so that the fire-proof and thermal-insulation board in a closed cell foamed structure is obtained. According to manufacturing method, organic materials and inorganic materials are organically combined, so that a novel fire-proof and thermal-insulation material with the fire-proof property of the inorganic thermal insulation materials and the thermal-insulation property of the organic thermal insulation materials is manufactured; and the fire-proof and thermal-insulation board is simple in forming technology, and can practically satisfy the energy saving and safety requirements of wall construction.

The invention relates to a preparation technology for a microspheric embolization agent. The preparation technology is used for preparing elastic microspheres cross-linked and polymerized by functionalized macromolecules with biocompatibility, wherein the grain range of the microspheres is 1-1500mu m. The preparation technology comprises the following steps that: a cross-linkable micromolecule with a crylic acid structure is connected on a polyvinyl alcohol, polyethylene glycol or polyose macromolecule in form of a covalent bond to form a functionalized macromolecule; and reversed phase suspension polymerization is conducted to the functionalized macromolecule and a 2-acrylamide-2-methylpropanesulfonic acid monomer to prepare cross-linked and polymerized microspheric embolization agent. The embolization agent has the advantages that the flexibility and the elasticity are high, the grain is even and is controllable, the dispersity is good, the raw materials are nontoxic and the biocompatibility and the stability are good. The preparation technology is a pure chemical synthesis technology, no virus pollution is caused to the raw materials and the preparation process, the requirements on international embolization agents are satisfied, and the embolization agent can substitute for all kinds of imported or domestic expensive embolization agent products and can be widely used in surgeries in the field of interventional therapy.

The invention provides a compound cesium fluoborate, a nonlinear optical crystal with the cesium fluoborate, methods for preparing the compound cesium fluoborate and the nonlinear optical crystal and application of the compound cesium fluoborate and the nonlinear optical crystal. A chemical formula of the compound is CsB<4>O<6>F, the molecular weight of the compound is 291.15, and the compound is of a crystal structure and is prepared by the aid of solid-phase synthesis processes or vacuum packaging processes. A chemical formula of the nonlinear optical crystal is CsB<4>O<6>F, the molecular weight of the nonlinear optical crystal is 291.15, the nonlinear optical crystal belongs to orthorhombic crystal systems, space groups of the nonlinear optical crystal are Pna2<1>, crystal cell parameters of the nonlinear optical crystal include that an a is equal to 7.9241 , a b is equal to 11.3996 , a c is equal to 6.6638 and an alpha, a beta and a gamma are equal to 90 degrees, and the unit cell volumes of the nonlinear optical crystal are 601.95 <3>. Frequency doubling effects of the nonlinear optical crystal is approximately two times frequency doubling effects of KH<2>PO<4> [KDP (potassium dihydrogen phosphate)], and ultrasonic absorption edges of the nonlinear optical crystal are shorter than 190 nm. The nonlinear optical crystal is grown from the CsB<4>O<6>F by the aid of melt processes, high-temperature solution processes, vacuum packaging processes, hydrothermal processes or room-temperature solution processes. The compound cesium fluoborate, the nonlinear optical crystal, the methods and the application have the advantages that the nonlinear optical crystal is free of deliquescence in air, is good in chemical stability and can be applied to all-solid-state laser devices as an ultraviolet nonlinear optical crystal or deep ultraviolet nonlinear optical crystal.

The invention provides a multivalent pneumococcal capsular polysaccharide composition as well as a preparation method and application thereof. The multivalent pneumococcal capsular polysaccharide composition contains a serotype 6A and at least one extra serotype selected from the group consisting of 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F. The multivalent pneumococcal capsular polysaccharide composition provided by the invention can be used for inducing an organism to generate humoral immunity, can generate a relatively good protecting effect for infectious diseases caused by the 24 common serotype pneumococcuses and is wide in immunity coverage rate and better in effect as comparison with various existing pneumococcal polysaccharide vaccines and conjugate vaccines sold on the market.

The invention relates to the technical field of aquaculture feedstuff. Premix material consists of composite vitamin and composite microelement according to the mass ratio of 5 to 10:15 to 20, wherein the composite vitamin consists of vitamin A, vitamin D, vitamin E, vitamin K3, vitamin B1, vitamin B2, vitamin B6, vitamin B12, nicotinic acid, calcium pantothenate, folic acid, biotin, inositol, vitamin C, beta-glucan, garlicin, DMPT, astaxanthin, topaz, antioxidant, mildew inhibitor and wheat middlings; and the composite microelement consists of ferric citrate, zinc sulfate, magnesium sulfate, methionine, potassium iodate, manganese sulfate, copper sulfate, sodium selenite, potassium chloride, choline chloride, betaine and zeolite. The invention has stable raw material sources and complete nutrition. A cultivated object grows rapidly with a high feedstuff conversion rate and good cultivating benefits. Compared with crabs eating other feedstuff sources such as rough fish, corn, bean pulp, and the like, the quality of Chinese mitten crab is improved. The invention relates to the feedstuff additive premix material for the Chinese mitten crab.

The invention discloses a multi-plant composition and an extract thereof as well as a preparation method and application of a microcapsule. The multi-plant composition comprises the following six natural plants folium ginkgo, mother chrysanthemum, honeysuckle, liquorice, dandelion and oat as natural plant active components at the mass ratio of (0.5-1) to (0.5-1) to (0.5-1) to (1-3) to (2-4) to (4-6); composite plant composition powder is prepared from the six natural plant extracts through a series of separation and purification processes; and in addition, the composition microcapsule is obtained from the composite plant composition powder by a liposome embedding technology. The obtained composite plant composition microcapsule is good in stability, does not change the physical and chemical properties of cosmetics when applied to the cosmetics, is stable in color, has the effects of resisting allergy, relieving the skin, resisting inflammation, resisting irritation and relieving itching, is obvious and lasting in efficiency and has slow-release property.

The invention discloses a process for preparing alumina-based continuous fiber with a sol-gel method. The process comprises the following steps of: adding aluminium nitrate and one or a plurality of kinds of carboxylic acids with the carbon number of 2 to 24 to distilled water; ensuring the mixture to react in the condition of continuous stirring under a certain temperature to obtain transparent carboxylate aluminium gel; adding a certain amount of solvent to the carboxylate aluminium gel, and adding a certain amount of silicon-contained additives and superpolymer spinning additives to obtain an alumina-based fiber precursor solution; concentrating the solution to obtain spinnable alumina-based fiber precursor sol; placing the concentrated sol to a liquid storage tank with a spray head, and spinning by adopting a dry method or a wet method to obtain alumina-based continuous fiber protofilament containing organic matters; and drying and sintering the protofilament to obtain the alumina-based continuous fiber. The alumina-based continuous fiber obtained by adopting the invention can be used for reinforcement of composite materials so as to further enhance the strength and toughness of the materials and improve the heat resistance of the materials, and is widely applied in the fields of aerospace, automobiles, and the like.

The invention relates to a preparation method of rare earth element modified and aldehyde removed resin and an application of the rare earth element modified and aldehyde removed resin in ethylene glycol refining. According to the preparation method, styrene is taken as a monomer, divinylbenzene is taken as a crosslinking agent, benzoyl peroxide is taken as an initiator, polyvinyl alcohol is taken as a suspending agent, water is taken as a reaction medium, and the components react in a suspension polymerization manner at the temperature of 85-95 DEG C; a polymer obtained after reaction is dissolved in dichloroethane for swelling, sulfuric acid is added for a sulfonation reaction, and cation exchange resin is obtained; and a nitric acid solution of the rare earth element is added into the cation exchange resin, and the rare earth element is chemically bonded to the resin to obtain the spherical modified and aldehyde removed resin. A fixed bed reactor is filled with the aldehyde removed resin, ethylene glycol is refined at the temperature of 60-70 DEG C, the density of a resin packing layer heap is 400-600 kg / m<3>, the reaction pressure is 0.4 MPa, under the catalytic action of the modified and aldehyde removed resin, impurity aldehyde and ethylene glycol have a condensation polymerization reaction and produce a product that does not influence an ethylene glycol product, and obtained ethylene glycol has high purity.

A composite transparent ceramic used for white-light LED fluorescence conversion and a preparation method thereof are provided. The composite transparent ceramic is composed of an upper and a lower layer of transparent ceramic bonded; chemical composition of the upper layer of transparent ceramic is (PrxY1-x)3Al5O12, wherein 0.0003<=x<=0.06; and chemical composition of the lower layer of transparent ceramic is (CeyY1-y)3Al5O12, wherein 0.0003<=y<=0.06. When a blue-light LED excites the composite transparent ceramic, yellow light generated by the lower layer of transparent ceramic mixes with red light generated by the upper layer of transparent ceramic and blue light transmitted through the upper layer of transparent ceramic to form high-quality white light, to thereby obtain the characteristics of high color rendering index and mild color temperature. In addition, the inventive composite transparent ceramic has the advantages of high shine quenches temperature, stable physicochemical properties, low cost, etc.