11 results about "Diethyl methylphosphonate" patented technology

The invention provides a production process of a flame-retardant insulating hot-melt pressure-sensitive adhesive. The flame-retardant insulating hot-melt pressure-sensitive adhesive comprises the following raw materials in parts by weight: 50-200 parts of matrix resin, 50-100 parts of tackifying resin, 1-10 parts of a plasticizer, 0.1-5 parts of a cross-linking agent, 0.6-6 parts of an initiator, 10-15 parts of a flame retardant and 0.6-6 parts of an emulsifier, the flame retardant is adopted, the flame retardant effect of the pressure-sensitive adhesive is improved, diethyl methylphosphate is used for flame retardant modification, the prepared hot-melt pressure-sensitive adhesive has excellent flame retardant performance, azodiisobutyronitrile is used for catalytic initiation, hydroxylation of an addition product is completed in an acid environment, and then high-pressure and high-temperature reaction is used, so that the flame retardant property of the hot-melt pressure-sensitive adhesive is improved, and the flame-retardant performance of the hot-melt pressure-sensitive adhesive is improved. And a grafting reaction is carried out, so that the continuation of a combustion reaction is prevented.

The utility model discloses a system for synthesizing N, N-bis (2-ethoxyl) aminomethyl diethyl phosphonate with low formaldehyde content, which comprises a reaction kettle I and a reaction kettle II, the reaction kettle I and the reaction kettle II are jacketed reaction kettles, and the reaction kettle I and the reaction kettle II are respectively provided with a top feed port and a bottom discharge port. A bottom discharge port of the reaction kettle I is communicated with a top feed port of the reaction kettle II, a reflux cooling assembly is arranged at the top of the reaction kettle I, and a bottom discharge port of the reaction kettle II is connected with a product storage tank. After diethanol amine and paraformaldehyde are reacted in a reaction kettle I, a water-carrying agent is added for azeotropic reflux water separation so as to realize azeotropic separation of water generated in the reaction, so that the purpose of rapidly and efficiently preparing the MHPZ intermediate is achieved, excessive formaldehyde is removed in the water-carrying process, and synthesis and preparation of N, N-bis (2-ethoxyl) aminomethyl diethyl phosphonate with low formaldehyde content are realized.

PURPOSE: To provide an electrolyte and a battery including the electrolyte.SOLUTION: An electrolyte includes a solvent, a lithium salt, and an additive. The solvent is composed of a fluorinated solvent, the fluorinated solvent includes fluorinated ethylene carbonate (FEC), and the additive includes diethyl 2-thiophene methyl phosphonate (DTYP). A content of DTYP is 0.01% to 1.2% based on a total mass of the electrolyte. The electrolyte of the present invention, on basis of using fluorinated solvent as solvent to provide a battery with good high voltage resistance performance, also through a synergistic effect of FEC and DTYP with specific content, forms SEI and CEI films with excellent thermal stability at positive and negative electrode interfaces, thus enabling the battery to have both good high-temperature storage performance and high-temperature cycling performance.SELECTED DRAWING: None

The invention discloses a preparation method of ramelteon. The preparation method comprises the following steps: 1, reacting tetrahydrofuran, sodium hydroxide and diethyl cyanomethylphosphonate to prepare a ylide solution, and dropwise adding the ylide solution into a solution of an initial raw material 1 to prepare an intermediate 1; 2, reducing the intermediate 1 through sodium borohydride under the action of nickel chloride and di-tert-butyl dicarbonate to obtain an intermediate 2; 3, performing hydrochloric acid deprotection on the intermediate 2 in a methanol solution to obtain an intermediate 3; 4, preparing an intermediate 4 through chiral resolution and recrystallization; 4, the intermediate 4 is subjected to propionylation under the alkaline condition, and ramelteon is obtained. According to the method, the intermediate 3 is resolved by using the organic acid which is low in price and easy to obtain in the market. The resolution process is simple, convenient and safe to operate and suitable for industrial production, the prepared ramelteon is high in yield and high in optical purity, and the market competitiveness of the ramelteon is enhanced.

The present invention relates to a process for the preparation of high purity diethyl hydroxymethyl phosphonate by reacting diethyl phosphite with paraformaldehyde in the presence of 1 to 3 mol% of sodium carbonate.

The present invention relates to a method for preparing diethyl hydroxymethylphosphonate in high purity by reacting diethyl phosphite with an aqueous formaldehyde solution in the presence of a base selected from sodium carbonate and potassium carbonate, wherein the amount of base is from 2 to 4 mol based on the amount of DEPI used.

The present application relates to the technical field of water pollution control, and particularly relates to a waste mine-based water body phosphorus removal agent and a preparation method thereof. The phosphorus removal agent is prepared by mixing, doping with ZrO2, grafting with a PNQE ligand and loading with a ternary metal cluster, with steel slag and red mud as the base body. The PNQE ligand is synthesized by step-by-step reaction of raw materials such as ethylenediamine and chloromethylphosphonic acid diethyl ester. The phosphorus removal agent realizes efficient removal of organic phosphorus and inorganic phosphorus by synergistic adsorption of phosphorus through anthraquinone-based oxidation of organic phosphorus and phosphonic acid groups and metal clusters, and has good cycle stability, wide pH adaptability, low heavy metal dissolution, and both resource utilization and environmental protection benefits.

The present invention provides a system for continuously producing diethyl methylphosphonite, comprising a rapid mixing reactor and a material circulation subsystem. An inlet of the rapid mixing reactor is provided with a rapid mixing component; the rapid mixing component comprises a first liquid inlet and a second liquid inlet; the second liquid inlet is used for feeding a material containing methylphosphonous dichloride; the material circulation subsystem comprises a filter, a material distribution unit, an acid binding agent premixer, and a heat exchanger, which are connected in sequence; the filter is also provided with a solid waste outlet; the material distribution unit is also provided with a diethyl methylphosphonite outlet; the acid binding agent premixer is also provided with a reaction raw material inlet and an acid binding agent inlet; an inlet of the filter is connected to an outlet of the rapid mixing reactor; and an outlet of the heat exchanger is connected to the first liquid inlet. A method for continuously producing the diethyl methylphosphonite by using the system can achieve large-scale continuous production of the diethyl methylphosphonite, and has the advantages of high product yield, stable production, and high production benefit.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of a rucotinib phosphate intermediate 3-cyclopentyl acrylonitrile. The method comprises the following steps: taking chlorocyclopentane as an initial raw material, reacting with magnesium chips to prepare a Grignard reagent cyclopentylmagnesium chloride, reacting with N, N-dimethylformamide to generate cyclopentylformaldehyde, carrying out addition reaction with sodium hydrogen sulfite to generate alpha-hydroxyl-cyclohexane methanesulfonic acid sodium salt, and carrying out reaction with sodium hydrogen sulfite to obtain the cyclopentylmagnesium chloride-alpha-hydroxyl-cyclohexane methanesulfonic acid sodium salt-alpha-hydroxyl-cyclohexane methanesulfonic acid sodium salt. And reacting the 3-cyclopentyl acrylonitrile with diethyl cyanomethylphosphonate to generate the 3-cyclopentyl acrylonitrile. The method has the advantages of simple synthetic route, convenience in operation, low cost, small amount of three wastes, environment friendliness and high product purity, and is more suitable for industrial mass production.

This invention provides a hyperbranched diethyl methylphosphonate derivative and a composite flame retardant containing the same. The hyperbranched diethyl methylphosphonate derivative is prepared by reacting diethyl methylphosphonate with triethanolamine in the presence of a catalyst to obtain a crude product; and purifying the crude product to obtain the hyperbranched diethyl methylphosphonate derivative. The hyperbranched diethyl methylphosphonate derivative of this invention has advantages such as high boiling point, easy uniform dispersion in rigid polyurethane foam, no catalyst deactivation, good flame retardant effect, and compliance with strict international regulations. Furthermore, the composite flame retardant of this invention has advantages such as low additive content and good flame retardant effect.

The invention relates to the field of high-molecular compounds, and discloses a butyronitrile latex glove and a preparation method thereof.The butyronitrile latex glove is prepared from carboxyl butyronitrile latex, modified ammonium polyphosphate, titanium dioxide, zinc oxide, sulfur, an accelerant, a modified anti-aging agent, a dispersing agent and pigment; the modified ammonium polyphosphate is prepared by modifying the surface of ammonium polyphosphate with ethyl silicate and then grafting a modified silane coupling agent; the modified silane coupling agent is prepared by carrying out substitution reaction on 1, 3, 5-tri (2-hydroxyethyl) cyanuric acid and diethyl methylphosphonate, carrying out substitution reaction on the prepared modified component and 1, 3-propane diamine, preparing an aminated modified component, and carrying out substitution reaction on the aminated modified component and 3-chloropropyltrimethoxysilane; the modified anti-aging agent is prepared from 4-nonylbenzene glycidyl ether and an anti-aging agent 6PPD through a ring-opening reaction, and the butyronitrile latex glove prepared by the method is excellent in mechanical property and has good ultraviolet aging resistance, long-acting thermo-oxidative aging resistance and flame retardance.