2349 results about "Phosphorus pentoxide" patented technology

Provided is a method for the synthesis of N-protected bis-3,6-[4-aminobutyl]-2,5-diketopiperazine including the step of heating a solution of c-amino protected lysine in the presence of a catalyst selected from the group consisting of sulfuric acid, phosphoric acid, and phosphorus pentoxide.

The invention relates to a preparation method for aromatic series polybenzimidazole resin film, comprising: (1) under function of polyphosphoric acid/phosphorus pentoxide system, condensation polymerization reaction is carried out to aromatic series amine and aromatic series dicarboxylic acids mixed according to mol ratio of 1:1 in nitrogen atmosphere; (2) after cooling, polymer is poured into water and broken down into powder in a resin pulper and washed over and over again by distilled water and soaked for 48 hours in NaHCO3 solution and washed till pH value shows neutral and drawn and filtered for drying in vacuum; (3) the polymer dried is dissolved in even solution prepared by organic solvent with mass percent of 5 percent, and then is dried at temperature of 130 DEG C for 12 hours, and is soaked in hot water for boiling and striping, and is dried in vacuum at temperature of 100 DEG C for 5 hours and then is obtained. The polybenzimidazole prepared by the invention has the advantages of big molecule weight, stable thermal stability, fine solubility and film forming performance, etc. The preparation has simple technology, low cost, convenient operation and can be finished in common equipments through preparation procedure.

The invention relates to a lithium ion battery composite cathode material and a preparation method. The cathode material comprises a hard carbon precursor material containing hetero atoms, and natural spherical graphite, wherein the hard carbon precursor material selects one or more than two of phenolic resin, polyfurfural, furan resin, polyvinyl alcohol, epoxide resin or polyacrylonitrile as raw materials, and accounts for 5 to 45 percent of the natural spherical graphite by mass; modifier of the hetero atoms is boron-containing modifier including boric acid and diboron trioxide, phosphor-containing modifier including phosphoric acid and phosphorus pentoxide, and nitrogen-containing modifier HNO3; and one of the modifiers accounts for 5 to 35 percent of the hard carbon precursor by mass. An analog battery formed by the cathode material which is prepared by the method has the capacity over 350 mAH/g and first coulomb efficiency up to 95.8 percent, and has good circulation performance. The preparation method has the advantages of low cost and simple process.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for monoammonium phosphate. A monoammonium phosphate product is prepared by directly subjecting high pure urea phosphate and ammonia to a double decomposition reaction and reacting for 20-60 min with stirring by controlling a reaction temperature at 40-80 DEG C and a pH value at a reaction endpoint being 4.2-4.6, and through the steps of cooling for crystallization; separating by centrifugation and drying. Measurements of physical and chemical indexes of the produced product show that the physical and chemical indexes of the produced monoammonium phosphate product meet an industrial first level standard. Specifically, the total nutrient content of monoammonium phosphate is higher than 73%; the content of total nitrogen is 12.01-12.23%; the content of phosphorus pentoxide is 61.05-61.25%; the content of moisture is 0.35-0.52%; a pH value is 4.2-4.6; the content of water insoluble materials is 0.090-0.096%; and the content of fluoride is 0.15-0.19%.

A melt processible Polyether Ether Ketone (PEEK) polymer with novel end-group structure is synthesized electrophilically using Methane Sulfonic Acid containing Methane Sulfonic Anhydride or Phosphorous Pentoxide. The product so obtained shows controlled structure with elimination of reactive end group like —COOH and is therefore melt processible by conventional techniques and exhibits high thermal and mechanical properties making it useful high temperature engineering and specialty plastics. It can be extruded into a rod, film and can also be molded into commercially useful products.

An equipment for recovering and utilizing the heat energy generated by burning yellow phosphorus and a system for preparing phosphoric acid by the hot method are disclosed. It is composed of steam manifold and burning tower with heat energy recovering function. The burning tower consists of ring-shaped membrane heat exchanger with fins, heat-insulaitng enclosed casing, P2O5 gas outlet tube, connecting tube of phosphorus sprayer, etc.. Its advantages include low consumption of coal, water and energy, low cost and reduced environmental pollution.

A special controlled-release fertilizer for long-acting corn and its preparation method. The fertilizer core accounts for 80-92% of the total weight of the fertilizer, wherein the weight sum of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer calculated by pure nitrogen, phosphorus pentoxide and potassium chloride is the fertilizer 25%-50% of the total weight, the weight ratio is: 2-4:1-2:1-3; the coating coating accounts for 8-20% of the total weight of the fertilizer, including: 69.5-93% sulfur, 530 % polyethylene wax, 0.5-2% leveling agent. Melt sulfur, add montmorillonite and stir evenly, then add leveling agent, stir evenly to form molten sulfur. The molten sulfur and polyethylene wax are simultaneously sprayed on the surface of the fertilizer core to form a slow-release coating layer. The process occupies less land, requires less investment in equipment, and consumes less energy. It has the characteristics that one fertilization can meet the nutrient needs of corn throughout the growth period. The fertilizer effect is long and safe, and fertilization is simple.

The invention discloses a multi-effect biofertilizer, comprising sarcandra glabra, cortex fraxini, radix stemonae, lightyellow sophora root, pin needles, isatis root, phellodendron, aloe, humic acid and inorganic fertilizers of nitrogen, phosphorus and potassium; the weight percentages of the components are as follows: 1-2.5% of sarcandra glabra extract, 1-2.5% of radix stemonae extract, 1-2.5% of phellodendron extract, 5-10% of aloe extract, 10-15% of pin needles, 7-10% of isatis root, 7-10% of cortex fraxini, 10-15% of lightyellow sophora root, 15-20% of humic acid, 10-20% of available nitrogen, 5-10% of phosphorus pentoxide and 5-10% of potassium oxide. The Chinese medicinal herbs of the invention have the advantages of sterilization and disinfestation, safety without pollution, combined herbs and fertilizers, compound multielements, comprehensive nutrition, long-acting slow release and improved utilization rate. The multi-effect biofertilizer can be widely applied to such cash crops as corn, cotton, rapeseed plants, peanuts, legume, silkworm and mulberry, tea forests, fruit grove and various vegetables.

The present invention relates to an optical glass using silicic acid group as main body, said optic glass has high expansion coefficient, high Young modulus, excellent weatherability and high transmissivity in the infrared wave zone. Said glass composition contains (mole%) 36-66% of silicon dioxide, 0-12% of aluminium oxide, 0-6% of boric oxide, 0-10% of magnesium oxide, 0-16% of calcium oxide, 0-16% of strontium oxide, 0-16% of baria, 0-8% of zinc oxide, 0-32% of lithium oxide, 0-25% of sodium oxide, 0-25% of potassium oxide, 0-20% of cesium oxide, 0-6% of phosphorus pentoxide, 0-8% of scandium oxide and others.

The invention discloses a UV-curable antimicrobial coating, the components of which are as follows: bisphenol A type epoxy acrylate EA; aliphatic PUA; special functional group acrylate PA; TPGDA; TMPTA; photoinitiators; nano acrylate; oxidized silver; and auxiliaries. The preparation method comprises the following steps of: step one, synthesizing special functional group heterocyclic compound PA and later adding phosphorus pentoxide to acrylic acid hydroxy esters so as to react with hydroxyl piperidine and then prepare special functional group heterocyclic compound PA; and step two, taking each component according to the formula, stirring and mixing each component so as to carry out dispersion at the speed of 900 to 1200r per min, then adding silver oxide and photoinitiators after being dispersed evenly, and finally obtaining UV-curable antimicrobial coating through dispersion. The UV-curable antimicrobial coating prepared by the invention has good anti-bacterial effect. As the self-prepared special functional group acrylate PA, the nano acrylate and the silver oxide are added, after UV-curable film-forming, the anti-coli rate can achieve over 99 percent and the anti-staphylococcal rate thereof achieves over 99 percent, and the effectiveness is long.

The invention relates to a method for directly producing high-purity oxygen-free copper by pyrogenic process continuous refining of scrap copper, and belongs to the technical field of non-ferrous metallurgy. The method comprises the following steps: by taking scrap copper as a raw material; analyzing the component characteristics of each batch of raw material, and then preparing into a mixture, wherein the mass percent of a copper element in the mixture is greater than or equal to 93%; adding metaphosphate or phosphorus pentoxide and flux to the mixture; refining by oxidation; stewing and drossing after oxidation is finished, and then orderly carrying out reduction refining and refining agent refining under an agitation state, so as to obtain the high-purity oxygen-free copper of which the copper content is greater than or equal to 99.95% and the oxygen content is smaller than 0.003%, wherein the electrical resistivity of the obtained copper wire after drawing is below 0.017241omega/(mm), and the relative electrical conductivity is over 100% of International annealed copper standard (IACS). The method is strong in flexibility, significant in refining effect, and applicable to different components of scrap copper materials; the scrap copper can be used for directly making a rod after being refined. Compared with the traditional pyrogenic process smelting-electrolytic refining-copper cathode purification process, the method disclosed by the invention has the beneficial effects that the flow is shortened, the cost is reduced, the energy is saved, and continuous operation is achieved.

The invention discloses a preparation method of a catalyst for hydrogenation desulfurization and denitrification of light-weight oil and is characterized in that the composition of the catalyst comprises a carrier, an auxiliary agent and active metals, wherein the carrier contains aluminum oxide, titanium oxide and silicon oxide; the auxiliary agent is phosphorus; the active metals are oxides of nickel, molybdenum and tungsten; and on the basis of the catalyst, the contents of all components in percentage by weight are as follows: 1 to 4 percent of cobalt oxide, 3 to 10 percent of nickel oxide, 2 to 12 percent of molybdenum oxide, 18 to 30 percent of tungsten oxide, 2 to 5 percent of phosphorus pentoxide, 2 to 15 percent of titanium oxide, 2 to 20 percent of silicon oxide, and the balance of aluminum oxide. The catalyst is obtained by the steps of carrier preparation, co-immersion, calcination and the like.

The invention provides a natural gas pipeline drag-reducing agent and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out esterification reaction on fatty alcohol and phosphorus pentoxide to obtain an esterification product; and (2) carrying out hydrolysis reaction on the esterification product to obtain a hydrolysis product, and then adding ethanolamine into the hydrolysis product to carry out neutral reaction, thus obtaining the natural gas pipeline drag-reducing agent. The preparation method of the natural gas pipeline drag-reducing agent has the advantages of direct material source, simple operation, moderate reaction conditions, relatively simple process and low requirements for equipment, and can easily realize the large-scale industrial production. Besides, the natural gas pipeline drag-reducing agent has potential application values in the aspect of natural gas pipeline transport.

The present invention discloses a method for improving the diffusion of a solar cell, comprising the following steps: A. adopting silicon material and P conductive type; B. diffusion: a silicon wafer chemically reacts with oxygen and phosphorus oxychloride at high temperature to produce phosphor, phosphorus pentachloride, phosphorus pentoxide and chlorine; C. feeding oxygen to reallocate: feeding oxygen to continue to react with unexhausted PCl5 to produce phosphorus; D. a phosphor atom Drive in process which is combined with the reallocation; E. the surface block resistance is 28-38 omega after the diffusion, the reallocation and Drive in processes. The method is capable of improving the conversion efficiency of high resistance rate single crystal silicon solar cells, the diffusion of the diffused silicon wafer surface is uniform; the method is easily implemented, the operation is convenient and the cost is low.

The invention relates to a hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and a preparation method thereof. The preparation method comprises the following steps: reacting raw materials phosphorus pentoxide and long-chain alkyl alcohol in a mol ratio of 2:1-4:1 to generate the product mainly comprising long-chain monoalkyl phosphate (MAP); reacting long-chain alkylmethyl dimethoxysilane and the MAP product in a mol ratio of 2:1-2.5:1 to generate an alkylsiloxane-phosphate product mixture, wherein the content of the hexatomic-ring long alkylsiloxane-phosphate is 80-85 wt.%, and the content of the linear alkylsiloxane-phosphate is 15-20 wt.%; and dissolving the obtained alkylsiloxane-phosphate product mixture in n-heptane to form a 30-50 wt.% solution, thereby obtaining the hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer. The invention has the advantages of high corrosion inhibition efficiency, high drag reduction rate and long effective period.

The invention relates to a catalyst for hydrogenation of Fischer-Tropsch synthesis oil, which is characterized in that lanthanide metal lanthanum and/or cerium, and/or non-metallic element phosphorus and/or boron and/or fluorine which are used as cocatalysts are added into active component nickel and tungsten and/or molybdenum, and the catalyst comprises the following components in percentage by weight: 10-18% of nickel oxide, 1-20% of tungsten oxide or molybdenum oxide, 0-15% of silicon oxide and/or titanium oxide; 0-10% of lanthanum oxide and/or cerium oxide; 0-10% of phosphorus pentoxide and/or boron oxide and/or fluorine oxide and 35-89% of aluminum oxide. The preparation method of the catalyst comprises the steps of preparing carriers, soaking active components and adding cocatalyst components. The catalyst of the invention is suitable for the hydrogenation process of oil products having high olefin content and containing a certain amount of oxygen compounds, is especially suitable for hydrogenation of Fischer-Tropsch synthesis oil products, and has the advantages of high hydrogenation activity, good catalyst stability and the like.

A joint preparation method of potassium dihydrogen phosphate, sulfur-based compound fertilizer and polymerize aluminum chloride(PAC), its characteristics include follow steps: dissolution and conversion of ammonium dihydrogen phosphate, filtering and cooling crystallization, double decomposition and neutralization cooling crystallization, prepared sulfur-based compound fertilizer, aluminum powder acid solution, preparation of PAC, and so on. Using this invention, not only can solve the impurities interference problem which caused by using orthophosphoric acid (phosphate) to produce potassium dihydrogen phosphate by wet method, can improve the recovery rate of potassium dihydrogen phosphatea almost to 100%, but also can obtain by-product of no chlorine sulfur-based compound fertilizer and PAC; the invention can make almost all the phosphorus pentoxide be water-soluble finished product, not after granulation and drying, directly through crystallization to obtain whole soluble compound fertilizer. Mother liquor circulation reaction make the eliminating of chlorine problem be simple; therefore, the product is high yield, low energy consumption, good quality.

The invention belongs to fertilizer technical field, more particularly relates to a rice special formula fertilizer, which is characterized in that effective elements of the fertilizer are calculated by weight percent of pure nutrient are nitrogen 25-15, phosphorus pentoxide 15-9, potassium oxide 20-12, silicon dioxide 5-0, calcium 8-0, sulphur 5-1 and zinc 2-1. Compared with the present technique, the rice special formula fertilizer of the invention has reasonable match, accords with the nutrient absorption law of rice, can promote rice growth obviously and raise rough rice output, increase economic benefits and improve rice nutriment quality. In application test, the rice special formula fertilizer of the invention increases the rice yield by 660-820 kg per hectare, increases income 756-146 RMB, increases crude protein, raw fat, crude fiber, nitrogenfree extract and crude ash by 4.1-8.6, 0.14-0.80, 0.4-0.8, 0.1-3.0, 0.4-1.0 percentage points respectively, increases brown rice rate, integral white rice rate, white rice rate of rice processed quality by 1.4%, 1.7% and 1.8% respectively, reduces chalkiness granule rate, chalkiness by 3.2% and 1.9% respectively, reduces content of amylose by 1.0%. In the meanwhile, the fertilizer utilization efficiency is raised by 5.1%-13.8%.

Disclosed is a method for producing graphene functionalized at its edge positions of graphite. Organic material having one or more functional groups is reacted with graphite in reaction medium comprising methanesulfonic acid and phosphorus pentoxide, or in reaction medium comprising trifluoromethanesulfonic acid, to produce graphene having organic material fuctionalized at edges. And then, high purity and large scaled graphene and film can be obtained by dispersing, centrifugal separating the functionalized graphene in a solvent and reducing, in particular heat treating the graphene. According to the present invention graphene can be produced inexpensively in a large amount with a minimum loss of graphite.