13 results about "Trimethyl phosphite" patented technology

The application provides a reaction device and method for continuously synthesizing trimethyl phosphite, and belongs to the technical field of trimethyl phosphite synthesis. The reaction device comprises a raw material tank group, a composite reaction kettle, a solvent tank, a pre-cooler, a water washing kettle, an alkali liquid buffer tank, a layered system and a rectification system. The raw material tank group comprises a methanol tank and a phosphorus trichloride tank. The raw material tank group and the solvent tank are connected with the composite reaction kettle through pipelines via the pre-cooler, and the composite reaction kettle is connected with the water washing kettle through a pipeline. The phosphorus trichloride drop-like feed is efficiently converted into a uniform liquid film by a centrifugal disc, and then the liquid film is converted into a fine jet flow by a spraying ring. The fine jet flow is instantaneously and highly intensively sheared with a strong vortex-shaped methanol / solvent flow formed through a tangential feeding pipe. The secondary intensified mixing mode replaces the macroscopic mixing limitation of a traditional stirred tank, realizes instant and uniform mixing of materials at a micro level, thereby inhibiting a side reaction and effectively improving a reaction rate.

The invention relates to the field of lithium ion batteries, and discloses a non-aqueous electrolyte, a lithium battery and electric equipment. Three additives including the N-sulfonyl substituted 2-imidazolidinone derivative, the sulfur-containing compound and the trimethyl phosphite are added into the non-aqueous electrolyte, the three additives generate a synergistic effect, volume expansion of a silicon-based negative electrode is inhibited, excessive decomposition of the electrolyte is avoided, consumption of active lithium and excessive generation of an SEI film are slowed down, and the service life of the non-aqueous electrolyte is prolonged. Therefore, the comprehensive performance of the silicon-based negative electrode lithium ion battery is improved. From the non-aqueous electrolyte formula optimization direction, a series of problems of interface damage and the like caused by volume expansion of the silicon-based negative electrode are improved by a simple, economical and effective method, and the application range of the silicon-based negative electrode lithium battery is widened.

The invention provides a method for reducing moisture of an addition liquid in glyphosate synthesis. The method comprises the following steps: carrying out a depolymerization reaction on paraformaldehyde and a catalyst A in methanol to obtain a depolymerization liquid; adding glycine, methanol and triethylamine into the depolymerization liquid for catalytic reaction to obtain addition liquid; trimethyl phosphite is added into the addition liquid, a hydrolysis reaction is carried out, and water in addition is consumed; after reacting for a period of time, supplementing dimethyl phosphite and triethylamine to obtain a condensation solution; and adding hydrochloric acid into the condensation liquid for acidolysis to remove chloromethane, hydrogen chloride, water or other light components, cooling, adding alkali to adjust pH, crystallizing, filtering and drying to obtain glyphosate. Hydrolyzate dimethyl phosphite and methanol can be applied to the next step of reaction, so that the consumption of dimethyl phosphite and methanol in the condensation reaction is reduced; the side reaction is reduced, the glyphosate yield is increased by 6% compared with that of the prior art, and the glyphosate content reaches 98.5% or above.

The invention belongs to the technical field of high polymer material additives, and particularly relates to a composite antioxidant stabilizer composition as well as a preparation method and application thereof, in particular to the composite antioxidant stabilizer composition and a one-pot preparation process thereof. According to the preparation method, 3, 5-methyl ester or meta-3, 5-methyl ester, octadecanol, pentaerythritol, trimethyl phosphite and absolute methanol are taken as raw materials, a zinc-containing compound is added as a catalyst, transesterification is catalyzed, and the composite antioxidant stabilizer composition containing an antioxidant 1076, an antioxidant 1010 and a phosphite antioxidant 618 at the same time can be prepared through a one-pot method. The antioxidant composition prepared by the method has the advantages that the antioxidant effect of the ABS resin can be obviously improved and the comprehensive performance of the ABS resin can be improved when the antioxidant composition prepared by the method is applied to the ABS resin as compared with the antioxidant composition prepared by the traditional method after auxiliaries such as the acid acceptor are added into the composition.

The application provides a finishing flame retardant and a preparation method and application thereof, and belongs to the technical field of functional textiles. The molar ratio of trialkyl phosphite and ethanolamine is 1:1.5-1:2.5, the reaction temperature of the ester exchange reaction is 80-180 DEG C, the reaction time is 4-18 hours, then unreacted trimethyl phosphite is removed by distillation, and the phosphite ester flame retardant is obtained, which is a mixture, the preparation method only needs one-step reaction, does not need to add an organic solvent, and does not need to collect tail gas, and the preparation process is simple, green and environment-friendly. The application provides a flame-retardant and anti-melt-dripping polyester fabric, polyols are introduced as carbon sources to further compound with the phosphite ester flame retardant, the phosphite ester can change the decomposition path of the polyester fabric at high temperature and promote the dehydration of the polyols into carbon, the two components produce a synergistic effect to form a protective layer covering the surface of the polyester fabric to inhibit the melt dripping and falling, and the nitrogen source is compounded to simultaneously play the condensed phase flame-retardant mechanism and the gas phase flame-retardant mechanism.

The invention relates to a synthetic method of methyl diphenyl phosphate, which comprises the following steps: mixing triphenyl phosphite, trimethyl phosphite, phenate and metal oxide, and carrying out transesterification to obtain the methyl diphenyl phosphate. According to the preparation method provided by the invention, by adopting the compound catalyst, the use of alkyl halide can be avoided, the reaction temperature is relatively mild, the purity is not lower than that in the prior art, and the problems of more byproducts, higher reaction temperature and safety risk caused by taking alkyl halide as a catalyst in the existing preparation method are solved.

The invention belongs to the technical field of lithium ion batteries, and provides an aluminum alkoxide-phosphate / phosphite electrolyte as well as a preparation method and application thereof. The aluminum alkoxide-phosphate ester / phosphite ester electrolyte comprises aluminum triethoxide, a phosphate ester / phosphite ester compound, an electrolyte solute and a non-aqueous solvent; the phosphate ester / phosphite ester compound is trimethyl phosphate, triethyl phosphate, triisobutyl phosphate, triphenyl phosphate, tripropargyl phosphate, tris (trimethylsilyl) phosphate, dimethyl methylphosphonate, diethyl ethylphosphonate, trimethyl phosphite, triethyl phosphite and triisopropyl phosphite, and the solvent is a solvent. The catalyst is one or more of triphenyl phosphite and tri (trimethylsilyl) phosphite. The electrolyte has good thermal stability and flame retardance under high voltage, and the safety of the battery is greatly improved; in addition, the electrolyte additive composition can inhibit the corrosion of the aluminum current collector, so that the side effect of the corrosion of the current collector on the battery is reduced.

The utility model relates to the technical field of trimethyl phosphite safety production, in particular to a tail gas treatment device for trimethyl phosphite safety production, which comprises an operation box, a spraying mechanism is mounted at the top end of the operation box, the spraying mechanism comprises a placing box and a spraying part, the spraying part is mounted at the bottom end of the placing box, and the spraying part is mounted at the bottom end of the placing box. The spraying part is installed on the upper side of the interior of the spraying box, an air inlet pipe is arranged at the left end of the spraying box and extends to the outer side of the left end of the operation box, a C-shaped pipe is installed on the right side of the spraying box, a water collecting box is arranged on the bottom side of the spraying box, and a purification mechanism is installed on the bottom side of the interior of the operation box and comprises a purification box and a screen. Primarily treated tail gas can be conveyed through a C-shaped pipe on the right side of the spraying box to be matched with a purification box on the bottom side to be purified, operation can be carried out continuously through the design, resource consumption is reduced, inactivated activated carbon can be taken out through an extension rod to be replaced, and therefore the applicability of the device is improved.

The invention belongs to the field of pesticide synthesis, and particularly relates to a synthesis process and a synthesis system of dichlorvos. The dichlorvos synthesis system provided by the invention comprises a mixer, a synthesis kettle, an inner coil cooler, a condenser, a demister, a purification kettle and a washing tower, wherein silk screen holes with the aperture of 0.5-5 microns are formed in the demister; the synthesis method comprises the following steps: adding trimethyl phosphite and trichloroacetaldehyde into a synthesis kettle through a mixer, reacting at the temperature of 60-90 DEG C and the pressure of-10-0kPa, and condensing, demisting and recovering chloromethane; reaction liquid enters a purification kettle and is vaporized and purified at the temperature of 75-95 DEG C and the pressure smaller than or equal to-80 kPa, and gas-phase dichlorvos is collected after being subjected to reflux impurity removal, secondary condensation and demisting through a washing tower. The dichlorvos crude oil with the content larger than or equal to 99% can be prepared, the raw material conversion rate is larger than or equal to 99.5%, the method is suitable for large-scale production, and economical efficiency and stability are both considered.

This invention relates to the field of deodorization equipment technology, specifically to a deodorization device and method for trimethyl phosphite distillation tail gas. It includes a spray tower, within which spray pipes and nozzles installed at the lower ends of the spray pipes are arranged. A dynamic demisting packing layer is provided at the top inner part of the spray tower. The dynamic demisting packing layer comprises multiple thin plates arranged parallel and at equal intervals at the top inner part of the spray tower. Adjacent thin plates form a tail gas channel for the tail gas to pass through. The spray direction of the nozzles is towards the upper end of the thin plates and the upper port of the tail gas channel. A driving mechanism is also provided within the spray tower to drive the thin plates to reciprocate within the spray tower, periodically changing the flow cross-section of the tail gas channel formed by adjacent thin plates. This invention effectively solves the problems of liquid flow deviation and asynchronous gas-liquid distribution in traditional packing layers by periodically reciprocating the thin plates and alternately changing the cross-sectional shape of the tail gas channel.

The application discloses a nonaqueous electrolyte and a secondary battery; the nonaqueous electrolyte comprises a solvent, a metal salt and an additive; the additive comprises a benzene structure additive with at least one of the following structures and TMP; wherein R1, R2, R3 and R4 are respectively selected from one of H, F, Cl, Br, a hydroxyl group and C1-10 alkyl. Trimethyl phosphite is used in the electrolyte, and a specific structure additive combination is introduced; the NH or =N structure in the benzene structure can be coupled with the -O- structure in the TMP; after benzene dehydrogenation or open bond, the -N-O acid salt or -N-O-P phosphorus nitrogen acid salt is formed with the TMP, can more effectively repair the SEI film for a long time, maintain the long life cycle of the cycle and storage performance, and inhibit the gas production in the long-term use process of the battery; and the overall performance of the battery in the long life cycle is comprehensively improved.

The invention discloses a microencapsulated modified aluminum phosphite and organic phosphorus synergistic flame-retardant epoxy resin composition and a preparation method thereof, and belongs to the technical field of high polymer material modification and flame retardance. The composition comprises the following components in parts by mass: 98-102 parts of epoxy resin, 10-15 parts of microencapsulated modified aluminum phosphite, 5-10 parts of an organophosphorus flame retardant and 25-35 parts of a curing agent, the microencapsulated modified aluminum phosphite is of a core-shell structure formed by coating aluminum phosphite with melamine-formaldehyde resin through in-situ polymerization, and the organophosphorus flame retardant is prepared from trimethyl phosphite, phosphorus oxychloride and pentaerythritol through catalytic condensation. During preparation, all the components are uniformly mixed and then cured and molded. By constructing a synergistic flame-retardant system, the problems that a traditional flame retardant is poor in compatibility and uneven in dispersion are solved, efficient flame retardance is achieved under the condition of low total addition amount, the smoke suppression and heat suppression effects are achieved, and the flame retardant is suitable for the fields of electronic appliances, aerospace and the like and has good practicability and industrial application value.

The invention discloses a ternary positive electrode material of a lithium ion battery, a preparation method of the ternary positive electrode material and the battery. The preparation method comprises the following steps: grinding a hydroxide precursor containing nickel, cobalt and manganese, a lithium salt, nano aluminum oxide and nano cerium oxide into mixed powder; dissolving polyethylene glycol in ethanol, adding paratoluensulfonyl chloride for reaction, extracting reaction liquid, and drying an oily organic phase; trimethyl phosphite is added into the organic oil phase, washing and drying are performed after heating reaction, then the organic oil phase is added into concentrated hydrochloric acid for hydrolysis, and a surfactant is obtained; and adding the mixed powder into a surfactant, treating, and calcining at high temperature to obtain the ternary positive electrode material of the lithium ion battery, according to the invention, the surfactant is used for assisting in synthesis of the single-crystal ternary positive electrode material, and single-crystal particles with good dispersibility and uniform particle size are obtained; and the surface active agent is used for regulating and controlling the crystal face exposure and the particle shape of the single crystal particles, so that the lithium ion diffusion rate is improved, the lithium ion transmission dynamics is improved, and the electrode material has relatively high specific capacity and relatively long cycle life.