139 results about "Dimethyl phosphonate" patented technology

The preparation formula of flame-resisting MAA/AN copolymer foam plastic consists of a monomer 1 (methacrylic acid MAA), a monomer 2 (acrylonitrile AN), an initiator, a cross-linker, a foaming agent, a nucleating agent, a molecular weight regulator and a flame-resisting agent (3-chloro-2-hydroxypropyl dimethyl phosphate or ammonium (3-chloro-2-hydroxyl) propyl phosphate). The preparation procedure is as follows: polymerizing the formula mixed solution into a foamable copolymer plate in a closed die, foaming and post-processing the foamable copolymer plate into a structurally flame-resisting MAA/AN copolymer foam plastic at a high temperature. The flame-resisting agent 3-chloro-2-hydroxypropyl dimethyl phosphate is synthesized by dimethyl phosphate, epoxy chloropropane and sodium alcoholate, and the other flame-resisting agent ammonium (3-chloro-2-hydroxyl) propyl phosphate is synthesized by phosphoric acid, epoxy chloropropane and carbomite or ammonium carbonate or ammonium bicarbonate, respectively. The invention achieves the structural flame resistance of MAA/AN copolymer foam plastic.

The invention relates to a reactive flame retardant and particularly relates to a triazine ring-containing phosphorus-nitrogen-silicon compound and a preparation method thereof. The preparation method comprises the following steps: S1, dissolving paraformaldehyde in methanol; adding a potassium carbonate solid; cooling the solution to 0 DEG C; stirring and adding dimethyl phosphate drop by drop; and S2, rising to room temperature, filtering out potassium carbonate after 1 hour, and decompressing and removing methanol from the filtrate to obtain colorless grease, namely an intermediate I. Compared with the prior art, the triazine ring-containing phosphorus-nitrogen-silicon compound provided by the invention has the beneficial effects that 1, three flame retardant elements phosphorus-nitrogen-silicon are integrated in one molecule, so that the heat stability, the charcoal forming property and the flame retardant synergic effect are improved; 2, the synthetic technological conditions are stable, the reaction process is easy to control and the production cost is low, and the compound has a good flame retardant effect under the condition of a small addition amount and can be used for flame retardant treatment of various fabrics.

The invention provides a new method for preparing a theobromine by a 3-methyl xanthine disodium salt methylation with more production value. The theobromine is prepared by using acetone as a solvent to react with a dimethyl sulfate under the existence of a sodium carbonate and then acidified. The invention uses the acetone as the solvent and decreases the hydrolysis loss of the dimethyl sulfate; the sodium carbonate provides an alkaline condition for the methylation reaction and the Ph value is intermediate. The dimethyl sulfate is dropped to carry out the methylation reaction with the advantages of good selectivity and a yield higher than other methylation technique by more than 10 percent. The acetone is recycled and reused, the reaction is relatively complete and has little caffeine by-product, and the acquired analysis content of theobromine crude product HPLC is larger than 90 percent. The invention is extremely applicable to industrial production.The invention relates to a refining method of santheose, which is characterized in that dissolves liquid alkali into crude santheose solution, decolourizes, fitlers, and adds reduction agent into filter liquor, acidifies at 60-80 DEG C until pH=5-6, filters and dries to obtain santheose final product. The inventive method has refining yield of 90%, standard product color, high product quality, low cost and industrialization suitability.

The invention belongs to the technical field of additives, and in particular relates to a gasoline additive. The gasoline additive consists of the following components in parts by weight: 30-40 parts of methanol, 5-6 parts of isobutanol, 10-15 parts of ethanol, 15-20 parts of methyl tertiary-butyl ether, 20-25 parts of naphtha, 0.1-0.5 part of dimethyl phosphate, 0.8-1.5 parts of tween 80 and 10-30 parts of a mixture of rosin and a camphor extracting solution, wherein the weight percent of rosin is 45% and the weight percent of the camphor extracting solution is 55%. The gasoline additive not only can greatly improve the octane value, but also is environment-friendly and safe, so that the gasoline quality is effectively improved, and the gasoline saving effect is obvious.

The invention belongs to the technical field of nuclear waste treatment and recycling, and relates to a method for extracting and recycling neptunium from spent fuel aftertreatment waste liquid. The method comprises following optional order-replaceable repeatable steps, and water phase back-extraction matte is finally collected. The steps comprise 1, neptunium in a neptunium-containing water phase solution is oxidized to be hexavalent, and an organic solvent containing dimethyl phosphonate (1-methyl heptyl) ester is added under the strong acid condition for extraction; organic phases are collected, a reducing agent is added, reextraction is carried out under the dilute acid condition, and therefore hexavalent neptunium in the organic phases is selectively reduced to be pentavalent and reextracted to enter a water phase; 2, a reducing agent is used for reducing neptunium in the water phase solution to be tetravalent, and an organic solvent containing dimethyl phosphonate (1-methyl heptyl) ester is added under the strong acid condition for extraction; and organic phases are collected, reextraction is carried out under the dilute acid condition, and therefore tetravalent neptunium in the organic phases is reextracted to enter the water phase. By means of the method, a neptunium nitrate solution with standard purity can be prepared.

The invention discloses a calcium sulfate whisker added fireproof coating material. The calcium sulfate whisker added fireproof coating material is prepared from the following raw materials in parts by weight: 8-12 parts of calcium sulfate whiskers, 5-8 parts of talcum powder, 10-12 parts of bentonite, 5-8 parts of pearlite, 3-5 parts of dimethyl phosphate, 10-15 parts of acrylic resin, 15-20 parts of epichlorohydrin resin, 2-4 parts of chlorinated rubber, 3-4 parts of ammonium polyphosphate, 1-3 parts of titanate coupling agent, 5-6 parts of pentaerythritol, 2-4 parts of starch, 3-4 parts of hydrogenated castor oil, 2-3 parts of glass powder, 3-4 parts of zinc borate, 1-3 parts of ferrocene, 6-8 parts of butyl latex, 2-3 parts of sodium fluosilicate, 3-6 parts of carbon black and 3-5 parts of wood fiber. The fireproof coating material disclosed by the invention has the advantages of good fireproofing and heat insulating properties, good adhesion, water resistance, acid/alkali resistance, good salt corrosion resistance, difficulty in shedding, stability in storage, no toxicity, environmental friendliness and the like.

The invention belonging to the technical field of materials, and particularly relates to a polyurethane reinforced grouting material containing a phase change additive and a preparation method of the polyurethane reinforced grouting material. The polyurethane reinforced grouting material containing the phase change additive comprises the following components in percentage by weight: 50-7% of polyurethane, 15-30% of dimethyl methylphosphate, 3-30% of phase change additive, 0.3-1.2% of tin compound, 0.3-1.2% of amine compound, and 0-0.8% of organosilicon defoaming agent. The phase change additive is an inorganic phase-change material, an organic phase-change material or a mixture thereof, and is uniformly distributed in polyurethane base in a dispersion manner; and when polymerization reaction radiates heat, the phase-change material can change from solid state into liquid or vitreous state into rubber state, rubber-like state and the like, absorbs part of heat radiated by the reaction of isocyanate and polyether polyol, and effectively reduces the inside heat accumulation temperature of the polyurethane grouting material.

The invention discloses a flame retarding polyurethane foam and a preparation method thereof. The flame retarding polyurethane foam comprises the following raw materials of premixed polyether polyol, diisocyanate and a composite flame retardant, wherein the weight ratio of the premixed polyether polyol to the diisocyanate is 1: (1-1.5), the usage amount of the composite flame retardant is 10%-20% of that of the premixed polyether polyol, the composite flame retardant comprises graphite and dimethyl phosphate, and the weight ratio of the graphite to the dimethyl phosphonate is (0.8-3):1. According to the flame retarding polyurethane foam and the preparation method thereof, the used graphite and the dimethyl methyl phosphonate are synergetic with each other, the graphite can be rapidly expanded into an efficient heat insulation oxygen barrier which is capable of preventing polyurethane from flaming, and the dimethyl methyl phosphonate is used for catalyzing dehydration and char formation of polyol to achieve the effect of retarding flame. To improve flame retarding performance of rigid polyurethane foams, compared with rigid polyurethane foam oxygen index generated during the usage of the graphite or the dimethyl methyl phosphonate, the rigid polyurethane foam oxygen index generated during the simultaneous usage of the graphite and the dimethyl methyl phosphonate can be increased by 5.

The invention relates to a material used for trace dimethyl methyl phosphate detection and the preparation method which belong to the sensing material for organophosphorus pesticide detection and the preparation method. The material of the invention consists of TPPS and flour. The preparation of the material comprises the processes: firstly, plant esterase is produced with flour on the market as the raw material and TPPS solution is prepared; then the plant esterase and the TPPS solution are sequentially fixed on a K9 glass sheet activated with glutaric dialdehyde; after the K9 glass sheet is dried with air, the finished product is achieved. As the material of the invention has simple components, low cost; the preparation method of the material is simple and the operation of the preparation is simple and convenient; the product prepared according to the invention has the advantages of convenience use, good detecting sensitivity and low detection limit that the product can detect effectively micro-trace DMMP; the invention can be widely used for the detection of trace organophosphorus pesticide residues in vegetables, fruits and other agricultural products, for food and environmental safety assessment, and for the monitor of the organophosphorus pesticide pollution of food and environment.

The invention relates to a synthesizing method for glufosinate-ammonium ammonium salt. The synthesizing method comprises the following steps: 1) synthesizing methyl methoxyphosphoryl propionate by the reaction of methyl phosphite dimethyl phosphate with methyl acrylate and methyl alcohol; 2) synthesizing 2-[(methyl methoxy)phosphoryl]methyl-3-oxo-butyrate dimethyl ester by the Claisen condensation of methyl methoxyphosphoryl propionate and dimethyl oxalate; 3) under the acidic condition, carrying out the hydrolysis reaction to the 2-[(methyl methoxy)phosphoryl]methyl-3-oxo-butyrate dimethyl ester so as to generate 4-hydroxymethylphosphonic oxide butyric acid; and 4) under the catalyst function, successively reacting with ammonia gas and hydrogen by the 4-hydroxymethylphosphonic oxide butyric acid, and preparing the glufosinate-ammonium ammonium salt. The synthesizing method is capable of avoiding using cyanide poisonous materials. The format reaction is not used, the amount of the solvent used in the production process is small, the reaction condition is moderate and easily controlled, the synthesizing method is suitable for industrial production, the production is safe and convenient to operate, the reaction process is short, and the yield is high.

The invention discloses a trifluoromethylthiolation reagent and the application of the trifluoromethylthiolation reagent. The application of the trifluoromethylthiolation reagent comprises the following steps: adding sodium trifluoromethanesulfinate, indole and derivatives of the indole, appropriate amounts of dimethyl phosphate, iodine elements and copper acetate in a reactor containing a toluene solvent, stirring for 12h under the protection of nitrogen at the temperature of 110 DEG C; filtering reaction produced liquid, and distilling off low-boiling point substances; performing ethyl acetate/petroleum ether column chromatography isolation to obtain the product, 3-trifluomethylthio indole. The trifluoromethylthiolation reagent, namely sodium trifluoromethanesulfinate which is low in cost and readily available, is used, so that the synthesizing cost is greatly reduced and the process is simple to operate.

The invention provides 2,4,6-tri(dimethyl phosphate amido)-1,3,5-triazine-tri-melamine salt and a preparation method and an application thereof. The method employs novel processes of dispersing dissolution of an inertia solvent, acidity control, and solvent washing, which solves the problem of easy partial hydrolysis of phosphatide dur to a structure factor. The embodiment result shows that the 2,4,6-tri(dimethyl phosphate amido)-1,3,5-triazine-tri-melamine salt can be successfully prepared by the method of the invention. The product as a fire retardant for being used in materials of PE, PP and PU has excellent flame retardation performance, and the oxygen index is 22.3-28.5%. In addition, with increase of addition of the 2,4,6-tri(dimethyl phosphate amido)-1,3,5-triazine-tri-melamine salt, the oxygen indexes of PE, PP and PU doped with 2,4,6-tri(dimethyl phosphate amido)-1,3,5-triazine-tri-melamine salt during flame retardation are increased.

The invention discloses a fuel additive capable of rapidly removing carbon deposits. The fuel additive is prepared from the following raw materials in parts by weight: 3 to 9 parts of ethanol, 4 to 8 parts of cyclohexanone, 1 to 6 parts of methylbenzene, 15 to 22 parts of methanol, 5 to 9 parts of dimethyl phosphate, 2 to 7 parts of methyl tertiary butyl ether, 4 to 10 parts of fatty acid methyl ester, 2 to 6 parts of C4-C8 straight-chain fatty alcohol, 2 to 9 parts of organic nitrate, 3 to 5 parts of n-heptane, 3 to 8 parts of dimethylbenzene and 6 to 11 parts of polyisobutene amine. The fuel additive capable of rapidly removing the carbon deposits has the benefits that, the carbon deposits of an exhaust pipe, a filter, an exhaust port and a fuel system can be rapidly removed, the utilization rate of a fuel can be increased, and the service life of an engine can be prolonged.

A method for synthesizing dimethyl methylphosphonate. Under protection of inert gas, A raw material trimethyl phosphite and a proper amount of benzene sulfonic acid catalyst are mixed and stirred; and a the mixture is subjected to a rearrangement reaction through a pressurized heating way, so as to synthesize a target product dimethyl methylphosphonate with yield up to 93% and purity higher than 99%. The invention has advantages of easily available raw materials, short synthesis time, simple production control, cheap and recyclable catalyst and little pollutant emission.

The invention discloses a one-component thermal-conductive reactive flame-retardant polyurethane hot melt adhesive and a preparation method thereof. The hot melt adhesive is characterized by comprising the following components: 1-30 parts of a polyether diol, 1-30 parts of a liquid polyester diol, 1-40 parts of a flame-retardant polyether polyol, 1-50 parts of a crystalline polyester diol, 1-30 parts of an isocyanate-containing modified organosilicon acrylate flame-retardant copolymer, 1-40 parts of isocyanate, 0.01-4 parts of a catalyst, 0.01-3 parts of an antioxidant, 20-120 parts of a thermal-conductive filler, and 0.1-6 parts of a silane coupling agent. According to the hot melt adhesive and method provided by the invention, poly(methacryloxypropyl mono-terminated dimethylpolysiloxane-random-dimethyl allylphosphonate-random-methyl acrylate-random-isocyanatoethyl methacrylate) is firstly synthesized and added into a polyurethane prepolymer, the thermal-conductive filler is added, high-efficiency dispersion is performed, an organosilicon acrylate copolymer chain segment and a reactive flame retardant are introduced, and therefore chemical resistance, flame-retardant properties and thermal conductivity of the polyurethane hot melt adhesive are improved.

The invention relates to a cotton reaction type phosphorus-nitrogen-sulfur synergistic flame retardant preparation method. Dichloro-cyanuro sodium sulfanilate salt is added into a three-mouth flask, an appropriate amount of distilled water is poured into the three-mouth flask to serve as a solvent, the three-mouth flask is fixed into a warm water bath of a heat collection type magnetic stirrer byan iron support after uniform stirring, dimethyl hydroxy methylphosphonate water solution is dropwise added into the three-mouth flask, continuous stirring reaction is performed under a certain temperature and pH (potential of hydrogen) condition for 4 hours, and products are dried by condensation and further separated and purified to obtain reaction type phosphorus-nitrogen-sulfur synergistic flame retardants. The reaction type phosphorus-nitrogen-sulfur synergistic flame retardants can be applied to functional finishing of pure cotton fabrics, the cotton fabrics can achieve excellent flame resistance, and the flame retardants are novel functional additives.

The invention relates to a manioc waste anaerobic fermentation residue pretreatment and saccharification method, belonging to the technical field of microbes. The method comprises the following steps: in a 1,3-dimethylimidazole dimethylphosphate ([Mmim]DMP)-hydrochloric acid-water pretreatment system, carrying out dissolution pretreatment on manioc waste anaerobic fermentation residue at 110-130 DEG C for 15-90 minutes, washing with deionized water to regenerate a cellulose raw material; and washing the regenerated cellulose raw material three times, adding an acetic acid-sodium acetate buffer solution to form a mixed system, carrying out enzymolysis with cellulase, and carrying out oscillating reaction on a 50 DEG C constant-temperature oscillating table at 180 rpm, thereby achieving the goal of decomposing the manioc waste anaerobic fermentation residue. The dilute hydrochloric acid is used for assisting the ([Mmim]DMP) to pretreat the manioc waste anaerobic fermentation residue, thereby implementing high-value utilization of the manioc waste anaerobic fermentation residue; and the reducing sugar yield is higher than 40%. The method has the advantages of simple technique, high efficiency, economical process, fewer three wastes and the like.

Production of chlorobenzyl dimethyl ester phosphate is carried out by taking chlorochlor, trimethyl phosphite, benzyl chloride and soda as material, commissioning and synthesizing reacting, separating low boiler, coarse distilling, refining distilling, loading, and obtaining chlorobenzyl dimethyl ester phosphate with purity 70-99.9%. It controls temperature, pressure and time in production, it can be used for insecticide and bactericide. Its advantages include low cost, simple operation, high output, and industrial production.

The invention discloses an environment-friendly anti-crease finishing agent for garment fabrics and a preparation method thereof. The finishing agent is prepared from the following components in parts by weight: butyl acrylate, trimethyl phosphite, styrene, 10 to 20 parts of polyoxyethylene ether, microcrystalline cellulose, sodium carboxymethylcellulose, dimethyl phosphate, dimethicone, N-methylpyrrolidone, citric acid, nano zinc oxide, a thickener, a surfactant, an emulsifier, a bacteriostatic agent, and deionized water. The finishing agent is low in yellowing, does not affect the original whiteness and color light of a textile, is high-temperature-resistant, can be instantaneously dissolved at high temperature, can give the textile a soft, fluffy and smooth hand feel, has no adverse effects on whiteness, color light and color fastness, has good fast water solubility, soft and smooth property and low spumescence, is suitable for soft finishing of various textiles, can give the textile a plump, smooth and soft hand feel and good water absorption, and can give the textile an excellent antistatic property, anti-pilling property and anti-crease property; the production cost is low, and the economic benefit is good.

The present invention relates to a 3D printing chitosan material using an ionic liquid as a medium, and a preparation method and an application thereof. The medium comprises at least an ionic liquid,and the ionic liquid is at least one of 1-allyl-3-methylimidazolium bromide, 1-allyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium dimethylphosphate and 1-carboxymethyl-3-methylimidazolium chloride. The 3D printing chitosan material usingthe ionic liquid as the medium has the advantages of effective realization of the three-dimensional molding of the chitosan material, simple steps, simplicity in operation, and designing and preparation of a three-dimensional chitosan functional material with different forms as needed.

The invention discloses a method for continuously preparing an olaparib intermediate by a microchannel modular reaction device. The method comprises the following steps: performing reaction on a dichloromethane solution of 3-hydroxyisobenzofuran-1(3H)-ketone and a dichloromethane solution of dimethyl phosphate in a first microreactor, and performing liquid separation to obtain effluent of (3-oxo-1,3-dihydroisobenzyfuran-1-yl)dimethyl phosphate; performing reaction on the effluent, a dichloromethane solution of 2-fluorine-5-formyl benzene nitrile and a dichloromethane solution of triethylaminein a second microreactor to generate reaction liquid of 2-fluorine-5-(3-oxo-3H-isobenzofuran-1-yl methylene)benzyl cyanide; and performing reaction on the reaction liquid and a homogenous mixed solution which is obtained by stirring an ethanol solution of sodium hydroxide and hydrazine hydrate in a third microreactor and treating the effluent to obtain the olaparib intermediate 2-fluorine-5-[(4-oxo-3,4-dihydrodiazene-1-yl-)methyl]benzoic acid.