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210 results about "Triethylamine phosphate" patented technology

Triethyl phosphate is a chemical compound with the formula (C2H5)3PO4 or OP(OEt)3. It is a colorless liquid. It is the triester of ethanol and phosphoric acid and can be called "phosphoric acid, triethyl ester".

Method for in-situ polymerization and modification of polyvinylidene fluoride microporous membrane

The invention relates to a method for in-situ polymerization and modification of a polyvinylidene fluoride microporous membrane. In the method, polyvinylidene fluoride microporous is dissolved in triethyl phosphate at first to prepare membrane-forming precursor solution, active solution is added into the membrane-forming precursor solution for in-situ polymerization under nitrogen protection, the mixture is kept static for 18-36 hours at the reaction temperature after reaction, membrane casting solution is prepared via deaeration and is processed by a membrane forming machine to prepare a primary membrane, the primary membrane is soaked in a coagulating bath for 0-3 hour(s) and is then transferred into an deionized water bath to be immersed for 1-48 hour(s) so as to be cured into a membrane, the membrane is naturally dried in the air at the room temperature, and thus the dry hydrophilic polyvinylidene fluoride membrane is prepared. The method is environmentally friendly, the reaction conditions are mild, the preparation method is simple, modification and preparation are completed simultaneously, the repeatability is good, the method cannot be limited by the type of the microporous membrane, a high-flux separating membrane can be obtained with no needs for external pore-forming agents, and the prepared microporous membrane is a dry hydrophilic membrane.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Production method of triethyl phosphite

The invention relates to a production method of triethyl phosphite, which belongs to the technical field of chemical production. Absolute ethyl alcohol, phosphorous trichloride are taken as main material, pure benzol is taken as solvent, triethylamine is taken as acid-binding agent, liquid ammonia is taken as reducing agent, and the triethyl phosphate is prepared through the processes of three-complex liquor preparing, synthetic reaction, water scrubbing reaction, layering, drying, crude distillation, rectifying, recovering and ammonia recovery and the like. The method adopts continuous production process of triethylamine, the material charging and the product discharging are continuous, the production capacity is strong, and the product quality is stable. With equal equipment and investment, the capacity of the method can be 6 to 7 times as the capacity of intermittent method. The method solves the problems of the prior production method that the production capacity is small, the production cycle of the product is long, the material consumption is large, the quality is unstable, the discharge amount of 'three wastes' is large, and the yield can not be guaranteed. The method has the advantages that the liquid ammonia is taken as reducing agent, the cost is low, the recovery factor of excess ammonia can reach more than 90 percent, the recovered ammonium chloride can be used as the crude product of ammonium fertilizer, the production cost is lowered, and the environmental pollution is reduced.
Owner:荆州三才堂化工科技有限公司

Biological active microsphere and preparation method thereof

The invention discloses a biological active microsphere and a preparation method thereof. Based on molar percentage, the microsphere is composed of 16- 36% of CaO, 4% of P2O5 and 60-80% of SiO2 composition; the particle size of the microsphere 1-5 [mu]m; and the microsphere is in a hollow ball shape. The preparation method of the biological active microsphere comprises the following steps of preparing an acid catalyst polyethylene glycol solution A according to a proportion, adding tetraethoxysilane, triethyl phosphate and calcium nitrate terahydrate into the solution A respectively in order according to a molar ratio of 60-80 : 4 : 16-36 to form a gel B; hydrothermal ageing the gel B at the temperature of 60 DEG C and drying at the temperature of 37 DEG C to obtain a dry gel; grinding the dry gel and performing heat treatment on the grinded dry gel at the temperature of 600 DEG C-800 DEG C to obtain a target product. Compared with a conventional biological active microsphere, the biological active microsphere provided by the invention is in regular sphere shape with a hollow structure and smooth surface; the particle size of the microsphere 1-5 [mu]m; a particle size distribution range is narrow and uniform; and the biological active microsphere has excellent fluidity, syringeability and security and is simple in preparation process.
Owner:佛山今兰生物科技有限公司

Method for preparing aluminum nitride electronic ceramic base plate by using tape casting method and solvent for tape casting method for preparing ceramic

The invention discloses a method for preparing an aluminum nitride electronic ceramic base plate by using a tape casting method. The method comprises the following steps: preparing tape casting slurry, and molding the tape casting slurry by using the tape casting method, thereby obtaining the aluminum nitride electronic ceramic base plate, wherein the tape casting slurry comprises a benzene-free mixed organic solvent, aluminum nitride ceramic powder and sintering aids; the benzene-free mixed organic solvent comprises three or more than three of absolute ethyl alcohol, isopropyl alcohol, n-butyl alcohol, triethyl phosphate and dibasic acid ester; and the solvent accounts for 28-40% of the mass of the aluminum nitride ceramic powder. The invention further provides a method for preparing high-solid content aluminum nitride tape casting by using an organic solvent which is non-toxic, relatively environmentally friendly and low in cost. The aluminum nitride electronic ceramic base plate which is high in density, uniform in microstructure and high in heat conductivity is prepared under a relatively low high temperature condition, and the tape casting production process is green and environmentally friendly and applicable to industrial popularization.
Owner:李军廷

Method for recovering useful constituents in mixed waste solvent during glufosinate ammonium production process

The invention discloses a method for recovering useful constituents such as tetrahydrofuran, methyl diethyl phosphate, triethyl phosphate and trimethylbenzene in a mixed waste solvent during a process of producing glufosinate ammonium by an integrated rectification process. The method comprises the following steps: using an integrated rectification process of discharging and rectifying in a single-tower side line and then connecting a single tower to rectify, directly extracting tetrahydrofuran from the top of the rectification tower in the side line and obtaining trimethylbenzene from the bottom of the tower; extracting the mixed solution of methyl diethyl phosphate and triethyl phosphate from the side line simultaneously, conveying the mixed solution to the rectification tower and carrying out single-tower separation, thereby obtaining methyl diethyl phosphate from the top of the tower and obtaining triethyl phosphate from the bottom of the tower. According to the method disclosed by the invention, the useful constituents in the mixed waste solvent during the glufosinate ammonium production process are recovered by the integrated rectification process, the total recovery rate of the mixed solvent exceeds 98%, and the quality achieves reuse standards. Compared with the conventional three-tower rectification method, the equipment cost and energy consumption of the method disclosed by the invention are obviously lowered.
Owner:江苏威格瑞斯化工有限公司

Preparation method of bioactive glass-wrapping modified zirconium oxide dental ceramic material

The invention discloses a preparation method of a bioactive glass-wrapping modified zirconium oxide dental ceramic material. The method comprises the specific steps that a hydrolysable silicon-containing compound, triethyl phosphate and nitrate are dissolved in a solvent, the pH value is adjusted, the mixed solution is subjected to a hydrolytic condensation reaction, and bioactive glass precursorsol is obtained; a zirconium oxide suspension solution which is evenly dispersed in advance is added to the bioactive glass precursor sol and evenly dispersed, the sol is converted into gel through aging, a layer of extremely-thin bioactive glass wraps the peripheries of zirconium oxide particles, and after high-temperature sintering, the bioactive glass-wrapping modified zirconium oxide dental ceramic material is obtained. The zirconium oxide dental ceramic material has good biological activity and excellent mechanical properties, proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells can also be promoted at the same time, and accordingly the material helps to improve the osseointegration capacity; the effect of repairing the dental material is improved, the wider clinical application of the material is promoted, and the material has high social economic value.
Owner:SOUTH CHINA UNIV OF TECH

Method for preparing triethyl phosphate

ActiveCN102206230AExcess ratio is smallContinuous control of esterification reaction productionGroup 5/15 element organic compoundsDiethyl phosphateAlcohol
The invention discloses a method for preparing triethyl phosphate, which is characterized by comprising: a step of esterification, which is to react phosphorus oxychloride with ethanol according to a molar ratio of the phosphorus oxychloride to the ethanol of 1:(1-5) in a jacket type cooling and stirring container set, obtain the mixture of ethanol and hydrogen chloride which are volatile components, condense the mixture in a reflux condenser, and absorb the incondensable volatile hydrogen chloride component by a washing tower circulating membrane absorption unit; a step of dealcholization and dehydrochlorination, which is to fill the reaction mixture obtained after esterification into a degassing distillation tower, remove the volatile components, namely ethanol and hydrogen chloride, in the reaction mixture, separate the excessive ethanol and hydrogen chloride, which are obtained from esterification materials, from triethyl phosphate, mainly obtain 95-to-98.5-weight-percent triethyl phosphate from the bottom of the degassing distillation tower, and obtain 99.99-percent triethyl phosphate and 67-percent diethyl phosphateby rectifying and separating; and a step of hydrogen chloride absorption, which is to introduce the hydrogen chloride gas obtained in the esterification and the hydrogen chloride gas from dealcholization and dehydrochlorination into a washing tower circular tube falling absorption unit, and producing 31-percent hydrochloric acid.
Owner:吉林市永林化工有限公司

Zanthoxylum dissitum Hemsl medicinal materials discrimination method

The invention relates to a discrimination method of Zanthoxylum dissitum Hemsl medical material, comprising establishing HPLC standard fingerprint of Zanthoxylum dissitum Hemsl medical material; measuring the fingerprint of the measured sample of the Zanthoxylum dissitum Hemsl medical material using the same method and comparing the fingerprint of the measured sample of the Zanthoxylum dissitum Hemsl medical material and the standard fingerprint of Zanthoxylum dissitum Hemsl medical material to screen the qualified Zanthoxylum dissitum Hemsl medical material in line with the standard fingerprint of Zanthoxylum dissitum Hemsl medical material. The process of establishing the HPLC standard fingerprint of Zanthoxylum dissitum Hemsl medical material comprises: preparing the sample solution and acquiring the HPLC standard fingerprint of Zanthoxylum dissitum Hemsl medical material by determing the common fingerprint features by comparing the fingerprintsof 30 batches of the Zanthoxylum dissitum Hemsl medical material at the conditions that: chromatographic column: Kromasil RP-C18 4.6mm*250mm, 5um; mobile phase: acetonitrile-0.2%triethylamine phosphate solution; using gradient elution: 0 min-10min-30min-70min; the ratio by volume of acetonitrile and 0.2%triethylamine phosphate solution is 5:95-10:90-10:90-40:60; detection wave:280nm. The invention provides a new method for quality control and discrimination of the Zanthoxylum dissitum Hemsl medical material.
Owner:ZHUZHOU QIANJIN PHARMA

Method for preparing hydroxyapatite/composite hole bioactive glass

The invention discloses a method for preparing hydroxyapatite/composite hole bioactive glass, relates to a method for preparing bioactive glass; and solves the problems of poor mechanical property, slow bone formation rate, complicated operation and high cost existing in the conventional composite hole bioactive glass material and the problem of low bone formation rate when coral is used as a transplanting material. The method comprises the following steps of: 1, dissolving triblock copolymer P123 in mixed solution consisting of absolute ethyl alcohol and hydrochloric acid, sequentially adding tetraethoxysilane, calcium nitrate and triethyl phosphate and stirring the mixture to obtain solution A; 2, washing the coral, immersing the washed coral in buffer solution, and washing and drying the mixture to obtain macroporous hydroxyapatite; 3, immersing the macroporous hydroxyapatite in the solution A to obtain an amorphous material; and 4, calcining the amorphous material to obtain the bioactive glass. The bone formation time of the material prepared by the method is shortened to be 12 hours; the biocompatibility and mechanical strength of the material both meet the requirements of bone repair materials; and the adopted device is simple and the raw materials have low price.
Owner:HARBIN NORMAL UNIVERSITY
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