143 results about "Methyl acetate" patented technology

The application discloses a catalyst for preparing methyl acetate or ethanol by hydrogenation of dimethyl oxalate and a preparation method thereof. The catalyst comprises an active component, an auxiliary component and a carrier. The active component is a single substance or an oxide of Cu, the auxiliary component is a single substance or an oxide of W, the high active site is a Cu-W alloy interface and single Cu and W metals, and the carrier is one or more than two of silicon dioxide, aluminum oxide, zirconium oxide, zinc oxide, magnesium oxide and cerium oxide. The copper-tungsten alloy catalyst provided by the application has the advantages of structural stability, high mechanical strength, good heat conduction performance, high substrate conversion rate and high product selectivity. The preparation method is simple in steps, easy in raw material acquisition, low in cost, green in pollution, good in preparation repeatability and easy in scale production. The catalyst has extremely high stability and catalytic activity in the reaction of preparing methyl acetate or ethanol by hydrogenation of dimethyl oxalate, high ethanol or methyl acetate yield and high active component utilization rate.

The invention provides a polymer framework ink, a polymer framework and cell-loaded gel collaborative 3D printing method and a structural body. The polymer framework ink contains a high-molecular polymer, an organic solvent and organic modified synthetic flaky silicate, wherein the organic solvent comprises a first solvent and a second solvent, the first solvent is an ethanol aqueous solution and / or absolute ethyl alcohol, and the second solvent is methyl acetate and / or isoflurane. The polymer framework ink provided by the invention is rapidly cured through direct volatilization of the organic solvent; the flake silicate is synthesized through organic modification, so that higher fidelity is obtained, and the effect of rapid shaping is achieved while curing is carried out; different sizes of pores in the polymer filaments can be obtained by controlling the temperature difference between the polymer frame ink and the environment; finally, collaborative printing of the polymer framework and the cell-carrying gel can be realized under mild conditions, and the activity of cells is ensured.

The invention provides a white flower salvia miltiorrhiza composition and application thereof in medicines for preventing and treating atherosclerosis, and belongs to the technical field of traditional Chinese medicines. According to the technical scheme, the composition is characterized by comprising 3-5 parts of white flower salvia miltiorrhiza root slices, 1-2 parts of white flower salvia miltiorrhiza dried leaves and 1-2 parts of white flower salvia miltiorrhiza extract. Mixing the white flower salvia miltiorrhiza leaf powder with a malic acid aqueous solution, carrying out ultrasonic treatment, filtering, and carrying out alcohol precipitation on filtrate to obtain an alcohol precipitate; extracting the white flower salvia miltiorrhiza root powder by using supercritical carbon dioxide to obtain a supercritical extract; mixing the alcohol precipitate and the supercritical extract according to the weight ratio of (7-9): (1-3) to obtain a white flower salvia miltiorrhiza extract; the alcohol used in the alcohol precipitation is methanol; methyl acetate is used as an entrainer in the supercritical carbon dioxide extraction. The white flower salvia miltiorrhiza composition provided by the invention has the beneficial technical effect of remarkably improving atherosclerosis.

This invention provides a flavoring agent for enhancing the honey-sweet aroma of tobacco, comprising the following raw materials and their mass percentages: 0.2-0.3% 2,3-pentanedione, 0.45-0.55% phenylacetic acid, 0.45-0.55% phenethyl acetate, 0.25-0.4% phenylethanol, 0.45-0.6% methyl phenylacetate, 0.45-0.6% ethyl phenylacetate, 0.5-0.6% menthyl acetate, 0.15-0.25% geraniol, and the balance being propylene glycol. This invention belongs to the field of tobacco flavoring technology. By combining 2,3-pentanedione, phenylacetic acid, and phenethyl acetate in a specific mass ratio and conducting testing and evaluation, a flavoring agent suitable for enhancing the honey-sweet aroma of tobacco has been successfully developed. The composition is clearly defined, significantly improving the honey-sweet aroma of tobacco products, with a rich and long-lasting aroma, and good taste harmony.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

The invention discloses a catalyst for preparing methyl acetate through carbonylation of dimethyl ether as well as a preparation method and application of the catalyst, and belongs to the technical field of industrial catalysis. A preparation method of a catalyst for preparation of methyl acetate through carbonylation of dimethyl ether comprises the following steps: placing a template agent-containing sodium mordenite molecular sieve in low-temperature plasma, and carrying out modification treatment under a first preset condition to obtain a modified sodium mordenite molecular sieve; performing ammonium ion exchange treatment on the modified sodium-type mordenite molecular sieve to obtain an ammonium-type mordenite molecular sieve; and placing the ammonium type mordenite molecular sieve in low-temperature plasma, and carrying out modification treatment under a second preset condition to obtain the catalyst, wherein the first preset condition comprises that modification treatment is carried out under gradient voltage; the second preset condition comprises modification treatment under a constant voltage. According to the preparation method disclosed by the invention, the acid density, the micropore specific surface area and the micropore volume of the mordenite can be improved, and the mordenite shows higher catalytic activity and stability in a reaction for preparing methyl acetate through dimethyl ether carbonylation.

The invention relates to a preparation method of a trifloxystrobin intermediate (E)-2-(2-bromomethyl phenyl)-2-methoxyimino methyl acetate, and belongs to the technical field of organic chemistry. The method comprises the following steps: by taking a trifloxystrobin intermediate (E)-2-(2-bromomethyl phenyl)-2-methoxyimino methyl acetate containing dibromo impurities as a raw material and an organic solvent I as a reaction medium, carrying out debromination reaction at 5-60 DEG C by using phosphite, desolventizing and extracting a reaction solution, and crystallizing to obtain the high-purity (E)-2-(2-bromomethyl phenyl)-2-methoxyimino methyl acetate. According to the method disclosed by the invention, the dibromo impurity of the trifloxystrobin intermediate is subjected to debromination treatment by adopting the phosphite, so that the dibromo impurity is converted into the trifloxystrobin intermediate. By adopting the method provided by the invention, the conversion time of the dibromo impurity can be obviously shortened, the content and the yield of the trifloxystrobin intermediate obtained by conversion are both higher than 95%, and the reaction efficiency and the quality of the intermediate are greatly improved.

The invention discloses a method for purifying methyl isobutyrylacetate, which comprises the following steps of: introducing a concentrated material obtained at the front end into the middle part of a continuous rectifying tower T1 for rectifying to obtain light components at the top of the tower, and removing dichloromethane, methanol and 3-methyl-2-butanone; a tower kettle substrate of the continuous rectifying tower T1 enters the middle part of a continuous rectifying tower T2 to be rectified, and diethyl methyl ester with the purity of 90% is obtained at the tower top; a tower kettle substrate of the continuous rectifying tower T2 enters the middle part of a continuous rectifying tower T3 to be rectified, and an isobutyryl methyl acetate product is produced at the tower top; the method has the advantages that the methyl isobutyrylacetate is purified by adopting a continuous rectification method, and rectification parameters are optimized, so that the yield of the methyl isobutyrylacetate can reach 85% or above under the condition that the purity of the methyl isobutyrylacetate is not lower than 99%; and the continuous rectification is continuous feeding and continuous extraction, the retention time is short, and the energy consumption is low.

This invention provides a method for preparing and purifying methyl isoglycyrrhizate. The preparation method includes reacting isoglycyrrhizic acid (of formula I) or its salt in a mixed solvent of methanol and methyl acetate in the presence of acetyl chloride. The purification method involves adding crude methyl isoglycyrrhizate to a mixed solvent of organic solvent and water after the reaction, heating and stirring to dissolve; then adding water dropwise, cooling to allow crystallization, and filtering to obtain a solid. This invention, by adding a certain amount of methyl acetate during the reaction, can ensure the conversion rate, control the acidity of the reaction environment, reduce the degradation of methyl isoglycyrrhizate, and greatly improve the product yield and material utilization. The purification method for methyl isoglycyrrhizate provided by this invention can efficiently remove impurity A from the product, is simple to operate, uses little solvent, has a high yield, and is environmentally friendly.

The application discloses a device capable of switching production of refined methyl acetate or acetate and methyl alcohol products, which comprises a fourth rectifying tower capable of switching for separating an aqueous solution of acetate or for rectifying and extracting crude methyl acetate, an eighth rectifying tower capable of switching for removing low-boiling impurities or for evaporating and purifying an extractant and a first rectifying tower capable of switching for extractive rectification of methyl acetate or for removing light components; the fourth rectifying tower is connected with the first rectifying tower, a fifth rectifying tower for refining acetate and a decomposition tower for hydrolyzing methyl acetate respectively; the first rectifying tower is connected with a second rectifying tower for purifying methyl alcohol and a third rectifying tower for removing light components again respectively, and the third rectifying tower is connected with a seventh rectifying tower for removing light components for the third time. The device has two functions, i.e. production of acetate, methyl alcohol and refined methyl acetate can be adjusted in time according to market conditions.

This invention discloses a method for synthesizing a mordenite molecular sieve-encapsulated metal catalyst for the synthesis of ester compounds, comprising the following steps: 1) mixing a water-soluble metal salt sequentially with an amine ligand and an alkali metal hydroxide to obtain a preliminary mixture solution; 2) mixing the preliminary mixture solution sequentially with an aluminum source and a silicon source to obtain a gel; 3) crystallizing the gel at 160–180 °C, cooling after crystallization, and separating to obtain an initial solid; 4) drying and calcining the obtained initial solid to obtain a preliminary molecular sieve; 5) placing the preliminary molecular sieve in an inorganic ammonium salt solution for ion exchange, separating the reactants after ion exchange to obtain a solid, drying and calcining the solid to obtain a mordenite molecular sieve-encapsulated metal catalyst for the synthesis of ester compounds. The catalyst obtained by this synthesis method can be used for the carbonylation of dimethyl ether to produce methyl acetate, exhibiting a relatively fast reaction rate while maintaining a high conversion rate of dimethyl ether.

The invention discloses a copper-zinc catalyst, a preparation method thereof and application of the copper-zinc catalyst in preparation of ethanol by hydrogenation of methyl acetate. Comprising the following steps: (1) mixing water, a silicon source, an aluminum source and alkali, stirring I, and crystallizing in a closed container to obtain a solution A; (2) mixing the solution A with an alkali solution, and stirring II to obtain a solution B; (3) mixing water, a copper source, a zinc source and an auxiliary agent source to obtain a solution C; and (4) mixing the solution B and the solution C, controlling the pH value to be 6.5-9.5, aging, washing, drying and roasting to obtain the copper-zinc catalyst. And carrying out hydrogen reduction on the copper-zinc catalyst, and carrying out hydrogenation reaction. The specific surface area of the catalyst prepared by the preparation method provided by the invention is increased, the particle size of the active species Cu is relatively small, the thermal stability of the catalyst is favorably improved, the catalytic activity is remarkably improved, and the catalyst has higher methyl acetate conversion rate and ethanol selectivity.

The invention belongs to the technical field of organic synthesis, and particularly relates to a chloroamine synthesis method which comprises the following steps: S1, mixing a hydroxylamine sulfate aqueous solution and methyl acetate, and then dropwise adding a NaOH aqueous solution to react for 1-2 hours; s2, adding trans-1, 3-dichloropropene and the sulfonated niobium-doped TS-1 molecular sieve, uniformly mixing, heating to 60-70 DEG C, and carrying out etherification reaction for 5-6 hours to generate an intermediate product; s3, adding hydrochloric acid into the intermediate product, fully stirring, and carrying out reflux reaction at 60-70 DEG C for 2-3 hours; s4, organic matter is separated through reduced pressure distillation, then a NaOH aqueous solution is added to adjust the pH to be larger than 9, extraction is conducted, the extraction agent is removed through reduced pressure distillation, and chloramine is obtained. According to the synthesis method provided by the invention, the selectivity of the chloro-amine is 99% or above, the yield of the chloro-amine is 98% or above, the production efficiency of the chloro-amine can be effectively improved, and the synthesis method is suitable for industrial application.

The invention discloses a method for producing bio-based dihydric alcohol. According to the method, bio-based methyl 2-tetrahydrofuroate, tetrahydrofurfuryl propionate and methyl 2-(tetrahydrofuran-2-yl) acetate are used as precursors for dihydric alcohol synthesis, Cu-Ga-Mn / SiO2 or Cu-Ga-Mn / SiO2-Al2O3 is used as a hydrogenation catalyst, cyclic ether ester structures are synchronously activated in a fixed bed reactor, ester group hydrogenation and tetrahydrofuran ring opening are synergistically carried out, and the high-purity tetrahydrofuran is obtained. The reaction path is shortened. The hydrogenation catalyst is prepared by combining a sol-gel method and hydrothermal synthesis through roasting and reduction, active components are uniformly distributed, and the hydrogenation catalyst has excellent hydrogenation activity and structural stability.

This invention relates to the field of energy storage electronic components, specifically to a lithium-ion battery. The lithium-ion battery includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on the surface of the current collector. The non-aqueous electrolyte includes a lithium salt, an organic solvent, and a first additive. The organic solvent includes dimethyl carbonate and a low-viscosity solvent, wherein the low-viscosity solvent is composed of at least one of methyl acetate, ethyl acetate, and ethyl propionate. The lithium-ion battery satisfies the following conditions: 0.05 ≤ 4, 0.01 ≤ a ≤ 2, 25 ≤ b ≤ 55, 4 ≤ c ≤ 30, 10 ≤ d ≤ 30. The lithium-ion battery of this invention can fully utilize the advantages of carboxylic acid ester solvents in increasing battery power, while greatly suppressing their degradation of high-temperature performance and thermal runaway, achieving a balance between high power performance and high safety performance.

The application relates to the technical field of fibers, and discloses a long-acting antibacterial fiber and a preparation process thereof. 1,3,5-tri(methyl acetate trimethyl ammonium bromide) benzene and ethylenediamine are subjected to amidation condensation reaction to obtain a quaternary ammonium salt antibacterial agent, then electrostatic spinning is carried out with polyurethane resin to obtain the long-acting antibacterial fiber. The antibacterial agent contains a large number of positive charges, can destroy the negatively charged cell membranes of bacteria, inhibit the growth of bacteria, has a good killing effect, and significantly improves the long-acting antibacterial performance of the fiber. The quaternary ammonium salt antibacterial agent contains a large number of amide bonds, forms hydrogen bond force with urethane groups of the polyurethane, has good compatibility, has little influence on the mechanical properties of the fiber, the polyurethane fiber maintains good breaking strength and breaking elongation, and can have good mechanical properties and antibacterial performance.

The invention discloses a reaction product separation device and a separation method. The reaction product separation device comprises a circulating tower, a pressure pump, a cooler, a water removal tank, a dehydration tower, a feeding pump and a product tower which are connected in sequence, the product tower is connected with the circulating tower; the circulating tower is also connected with the raw material water separation tank; by adopting an operation method of coupling decantation non-sharp separation rectification and variable pressure crushing azeotropy, the separation device can be used for continuously separating reaction products of a process for preparing methyl acrylate from methyl acetate-formaldehyde in industry, and is simple in process, small in equipment number, simple and convenient to operate and suitable for industrial large-scale separation.

This invention discloses a method for producing mixed alcohols using bio-based methyl acetate as a green hydrogen acceptor, relating to the field of biomass energy chemical technology. The method provided by this invention includes at least the following steps: adding green hydrogen and bio-based methyl acetate to a hydrogenation reaction unit; after hydrogenation, a mixture is obtained; adding the mixture to a gas-liquid separation unit; after gas-liquid separation, unreacted green hydrogen and a mixed liquid are obtained; adding the mixed liquid to a distillation unit; after distillation, unreacted bio-based methyl acetate and a mixed alcohol are obtained. The method for producing mixed alcohols provided by this invention achieves efficient green hydrogen carrying capacity and on-site consumption of wind / solar power, while simultaneously enhancing the value of bio-based acetic acid. The product can be directly used as marine fuel, aligning with the "dual carbon" goal and possessing both economic and environmental significance.

The application belongs to the field of chemical industry, and particularly relates to a synthesis method of a substituted pyrazoloquinazoline derivative. The method provided by the application comprises sequentially preparing 2-chloro-5,6,7,8-tetrahydroquinazoline, 2-chloro-6,7-dihydroquinazolin-8(5H)-ketoxime, 2-chloro-6,7-dihydroquinazolin-8(5H)-ketone, 2-(2-methoxy-8-oxo-5,6,7,8-tetrahydroquinazolin-7-yl)-2-oxoacetic acid methyl ester and 1-(2-hydroxyethyl)-8-methoxy-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxylic acid methyl ester, and finally obtaining 1-(2-hydroxyethyl)-8-((5-(4-methylpiperazin-1-yl)-2-(trifluoromethoxy)phenyl)amino)-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxamide. By using the method of the application, three reaction steps are reduced, the total yield is increased by nearly one time, and the method is far higher than the original process route; and the application of dangerous reagents such as hydrazine hydrate and iodine is avoided, and the method is easy to scale up.

The present invention provides a silicone elastomer material. The silicone elastomer comprises a grafted VMQ polysiloxane; and the grafted VMQ polysiloxane is α,ω-divinyl polydimethylvinylsiloxane which is grafted with methyl thioglycolate, has a grafting ratio of >70%, and is end-capped with (CH2=CH)(CH3)2SiO1 / 2. The present invention further provides a preparation method for the silicone elastomer material. The silicone elastomer material has the advantages of low swelling ratio, high retention rate of mechanical properties, etc.

The invention relates to the technical field of batteries, in particular to a wide-temperature-range high-rate lithium battery ester-based electrolyte and application. The electrolyte comprises soluble lithium salt and a liquid component, the liquid component is a solvent; the solvent comprises at least three of propylene carbonate, fluoroethylene carbonate, isopropyl trifluoroacetate, ethyl trifluoroacetate, ethyl acetate, methyl acetate and methyl trifluoroacetate; the lithium salt lithium battery comprises at least two of common lithium salts. The electrolyte developed by the invention is used in the lithium battery and can stably work at 40-60 DEG C, the specific discharge capacity of the battery is still 62.83% of the specific discharge capacity of the battery at room temperature even at 30 DEG C and 4C multiplying power, and the electrolyte has excellent wide-temperature fast charge performance. In addition, the electrolyte effectively inhibits the growth of lithium dendrites and the side reaction of an electrode-electrolyte interface at low temperature, and promotes the formation of a solid interface film which is rich in inorganic matters and low in interface impedance. The invention has the advantages of reasonable component design and excellent product performance, and is convenient for industrial application.

The application discloses a modification method of mordenite molecular sieve and application thereof, and belongs to the technical field of industrial catalysis. The modification method of the mordenite molecular sieve comprises the following steps: placing sodium type mordenite molecular sieve containing a template agent in a low-temperature plasma, and modifying and treating the sodium type mordenite molecular sieve under preset conditions to obtain modified sodium type mordenite molecular sieve; performing ammonium ion exchange treatment on the modified sodium type mordenite molecular sieve to obtain ammonium type mordenite molecular sieve; and performing calcination treatment on the ammonium type mordenite molecular sieve to obtain hydrogen type mordenite molecular sieve; wherein the preset conditions comprise the following steps: using a gas containing oxygen as a plasma generation gas; performing the modification treatment under a gradient voltage; and the time for the modification treatment is 1-120 min. The modification method can improve the acid density of the mordenite, and the mordenite has higher catalytic activity and stability in a reaction of dimethyl ether carbonylation for preparing methyl acetate.

The application discloses a method for continuously synthesizing 2-methyl acetoacetate, which comprises the following steps: continuously synthesizing 2-methyl acetoacetate by sequentially feeding raw materials into a micro-channel continuous reactor, a liquid-liquid separator and a fixed bed reactor with a catalyst, wherein the raw materials comprise material A composed of methyl acetoacetate and acetic acid, and material B composed of formaldehyde and an alkaline catalyst. In the method, the continuous double-feeding mode is used, the characteristics of precise dosing of the micro-channel, step-by-step promotion without back mixing and fast reaction are combined, and hydrogenation is carried out after the reaction of the raw materials is completed, so that the problem of reduction of formaldehyde can be effectively solved, the possibility of generation of impurities is reduced from the source, and then the product content and the yield can be improved. The method has the advantages of simple operation, safety and convenience, suitability for industrial production, small equipment investment, high product purity, high yield and the like. The content of the obtained product is more than 98%, the yield is more than 97%, and the product has good market competitiveness.

The utility model discloses a kind of determination device of carbonyl iron in coal-based methyl acetate, including ultraviolet light source controller, the ultraviolet light source controller is connected to multiple ultraviolet lamp light sources by signal line, ultraviolet light source controller can simultaneously adjust control wattage, wavelength and luminous flux of multiple ultraviolet lamp light sources;Ultraviolet lamp light source is used to irradiate high-transmittance analysis dish, and special coating mirror surface passes reaction image in high-transmittance analysis dish to high-speed camera, and high-speed camera is connected with computer image analysis system.The utility model can realize multiple sample parallel detection, with the characteristics of small error, accurate control.

The application provides a continuous production device and method of methyl cyanoacetate, which comprises a feeding unit, a reaction unit and a post-treatment unit connected in sequence, the reaction unit comprises a tubular reactor, the lower part of the tubular reactor is provided with a methanol feeding port and a sodium cyanide feeding port, the top of the tubular reactor is provided with a methyl chloroacetate feeding port, and the bottom of the tubular reactor is provided with a methyl cyanoacetate crude product discharging port; the feeding unit comprises a methanol feeding device, a sodium cyanide feeding device and a methyl chloroacetate feeding device, and the methanol feeding device, the sodium cyanide feeding device and the methyl chloroacetate feeding device are connected with the methanol feeding port, the sodium cyanide feeding port and the methyl chloroacetate feeding port respectively. The tubular reactor is used for continuous production, compared with the traditional batch production mode of the reaction kettle, the problem of sodium cyanide solid feeding is solved, the occurrence of the reverse reaction is effectively inhibited, and the yield of methyl cyanoacetate is greatly improved.

A cleaning composition may include about 20 wt % to about 90 wt % dimethyl carbonate; 0 wt % to about 40 wt % methyl acetate and / or t-butyl acetate; and 0 wt % to about 10 wt % of one or more hydrocarbons of general formula (I): CnH2n+x (I); wherein n is in a range of 5 to 8; and wherein x is 0 or 2. The cleaning composition may be a low VOC content brake cleaning composition useful for removing oil and particulate contamination from braking system components of vehicles such as automobiles.

The application discloses a kind of fast screening method of solvent residual quantity in food contact packaging material, sample is sent into gas chromatograph by headspace sampler and separates out the gas to be measured, and the gas to be measured is detected using hydrogen flame ion detector, and the chromatogram of sample is obtained;Add mixed standard intermediate liquid of known content in blank matrix to obtain the standard reference sample of the limited concentration to be measured, and the peak area of methyl acetate, benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene is measured respectively;By comparing the sum of the peak area of all detected substances in sample chromatogram with the chromatographic peak area of methyl acetate in standard reference sample, judge whether the total amount of residual solvent meets the limit requirement, and by comparing the peak area of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene in sample with the peak area of corresponding substance in standard reference sample, judge whether each benzene solvent meets the limit requirement.

The utility model discloses a safe type storage tank for methyl acetate production, including charging end, the middle part fixed connection baffle of charging end, is equipped with a groove body respectively at the both sides of baffle, and groove body slidingly connects in charging end, and the top surface of charging end is embedded and sets up the pump body, and the input fixed connection of pump body divides the shunt pipe, and the two input fixed connection of shunt pipe divides the solenoid control valve, and the end of solenoid control valve is connected with the connecting pipe, and the end fixed connection of connecting pipe stores the jar body, and the sealing element is equipped in connecting pipe, and the jar body elevating connection is in groove body, and the top wall fixed connection probe of charging end. The utility model discloses through setting up probe in the top wall of charging end, can real -time monitoring the gas leakage condition at jar body and connecting pipe place, and probe signal linkage solenoid control valve, and the solenoid control valve of automatic closing leakage storage tank corresponds, and the material passageway is cut off simultaneously, and the cylinder drives support platform to drop, makes jar body and connecting pipe separate.

This invention relates to a methyl chloroacetate synthesis system, belonging to the technical field of chemical production. The methyl chloroacetate synthesis includes an esterification tower, which comprises a tower body A. The top of tower body A has a first discharge point connected to a phase separator via a pipe A. A first condenser is mounted on pipe A. The bottom of tower body A has a second discharge point connected to the inlet of a first reboiler via a pipe. The middle section of tower body A is an esterification zone, and the outer wall of the middle section of tower body A has a first feed point and a second feed point communicating with the esterification zone. This invention has the following advantages: the methyl chloroacetate synthesis system of this invention achieves methyl chloroacetate production at a relatively low cost, reducing methyl chloroacetic acid consumption and improving product quality and yield.