91results about How to "Overcome the problems of many processes and heavy workload" patented technology

The invention discloses a low-pressure casing and manufacturing technology of an aluminum alloy cylinder part. Aluminum alloy materials adopted in the technology comprise, by mass, 6.0 percent to 7.0 percent of Si, 0.3 percent to 0.5 percent of Mg, 0.1 percent to 0.2 percent of Ti, 0.05 percent to 0.15 percent of Fe and the balance of Al. After the materials are melted, thinned, metamorphosed and refined, low-pressure cast moulding is carried out on the materials. Through the liquid ascending, mould filling, pressure maintaining and pressure relieving processes of the low pressure casting, a casting is formed in a mould cavity. After solution treatment and non-complete artificial aging heat treatment are carried out on a casting blank, the low-pressure casing and manufacturing technology has the advantages that the structure is compact, casting defects of pores, porosity shrinkage, cavity shrinkage, slag inclusion and the like are solved, the casing quality is improved, meanwhile, the machining allowance of the casting is small, the material utilization rate is improved, and the manufacturing cost is reduced.

The invention discloses a casting method of a pump body. The casting method of the pump body comprises the steps that resin-bonded sand is taken as a raw material; the resin-bonded sand is adopted formanufacturing a sand mould, and a resin-bonded sand mould is manufactured after mould matching and mould assembling; then pouring liquid is prepared, wherein the pouring liquid comprises the following chemical components of 3.0-3.2% of C, 1.8-2.0% of Si, 0.4-0.5% of Mn, 0.08% of P, 0.01% of S, 0.03-0.04% of Mg, 0.01-0.02% of Re, 0.6-0.8% of Cu or 0.04-0.05% of Sn, and the balance Fe; the raw materials in the previous step are heated to a smelting temperature in an electric furnace, an alloy is fully molten into molten iron, and thus the pouring liquid is formed; the pouring liquid is poured into the resin-bonded sand mould, and a casting is formed after the pouring liquid is solidified; and after the casting is cooled wholly, the casting is subjected to sand removal and then heat treatment. With the adoption of the technical scheme, the production efficiency is improved, the production cost is lowered, and the casting quality is effectively ensured.

The invention relates to a casting process for a crankshaft. The casting process comprises the following steps: step S01: producing a sand mould according to the design dimension requirements of the crankshaft, horizontally arranging the axis line of the sand mould, forming a direct gate and an inner gate in the sand mould, connecting the direct gate with the inner gate through a transversal channel, roasting the sand mould for 20 minutes at a high temperature of 750-900 DEG C, and then cooling to 400 DEG C; step S02: smelting a steel material in a circuit, after a temperature rises to 1400-1500 DEG C, adding a refining agent and refining for 20min to obtain molten steel in which a carbon content is 0.1-0.14%, a silicon content is 0.15-0.19%, a nickel content is 0.36-0.45% and a manganese content is 0.46-0.55%; step S03: pouring the molten steel in the step S02 into the direct gate and the inner gate of the sand mould in the step S01, controlling a pouring temperature to be 1560-1660 DEG C and controlling a pouring time to be 40s, and after the pouring is finished, insulating for 30min; and step S04: cooling to normal temperature, talking out the formed crankshaft, cleaning the surface of the crankshaft, and then polishing to obtain the crankshaft.

The present invention discloses a process for preparing polyoxymethylene dimethyl ether through an acetalization reaction. According to the present invention, the process comprises the following two steps that under the catalysis effect of an ionic liquid ILI, a formaldehyde aqueous solution is subjected to a polymerization reaction to obtain a mixed aqueous solution of trioxymethylene and formaldehyde, and under the catalysis effect of an ionic liquid ILII, the mixed aqueous solution of trioxymethylene and formaldehyde and methanol are subjected to an acetalization reaction to prepare the polyoxymethylene dimethyl ether. According to the present invention, the formaldehyde aqueous solution is adopted as the initial reaction raw material, the continuous polymerization and the acetalization reaction are used to prepare the polyoxymethylene dimethyl ether, and the formaldehyde utilization rate is high; the film type evaporator is used, such that the rapid separation and the recycling of the light components are achieved, and the separation efficiency is high; and the catalyst separation is simple, and the catalyst recycling is achieved.

The invention discloses an evaporative pattern casting process for a fuel oil engine cylinder cover. The evaporative pattern casting process comprises the following steps: a mould is manufactured by dividing a real object into multiple mould slices; an evaporative pattern casting raw material is injected into the mould to obtain an evaporative pattern casting slice similar to the real object; the mould slice is dipped with an evaporative pattern casting coating, then placed in a casting sand box, vibrated and poured so as to fuse the evaporative pattern casting slice into carbonic oxide and carbon dioxide both which are discharged to obtain a real object mould; the process can be used for overcoming the problem that an existing diesel engine and gasoline engine cylinder cover molding sand casting process is great in labor intensity, large in raw material consumption, heavy in casting weight, serious in environmental pollution, weak in redundancy degree and large in mechanical processing, and thus the evaporative pattern casting process is environmentally-friendly, the raw material is saved, the labor intensity is reduced and the performance is improved.

The invention discloses a regeneration recycling method of sodium hydroxide. The method is mainly used for regeneration recycling use after usage of sodium hydroxide in metallurgical and chemical engineering process. The technological process is as follows: firstly adding calcium carbonate into a sodium sulfate salt solution, adjusting pH value of the solution by introducing carbon dioxide or adding sulfuric acid to convert sodium sulfate salt to sodium bicarbonate, filtering to obtain gypsum and a sodium bicarbonate solution, causticizing by adding lime into the sodium bicarbonate solution, filtering to obtain a regenerated sodium hydroxide solution and calcium carbonate, and continuously using calcium carbonate by returning calcium carbonate to sodium sulfate salt conversion process. The method of the invention has a simple technology, is convenient to operate and is economic and environmentally friendly.

The invention discloses a preparation method of air-cooling lower bainite/martensite complex-phase wear resistant cast steel. Mn is adopted as a main alloy element; small numbers of such alloy elements as Cr, B and rare earth elements (La, Ce, Nb and Pr) are added; and the balance is Fe. The alloy elements are smelted by a conventional steelmaking process, are cast and molded, are austenitized and air-cooled or forced-air-cooled, are heated and insulated, and are tempered with low temperature. The structure of the produced wear resistant cast steel after the air cooling consists of lower bainite/martensite and a small number of granular bainite. The hardness of the cast steel is higher than 50 (HRC); and the no-gap impact energy AK is higher than 50 J. The wear resistant cast steel has the advantages of low alloy element content, excellent toughness fit and wear resistance, simple process and low cost; the preparation method can be used for manufacturing various low-alloy wear resistant cast steel parts; and in particular, the preparation method has unique advantages for the wear resistant cast steel parts with complex shape structures, large sizes and easy rupture properties in quenching.

The invention discloses a process for synthesizing a methanol catalyst. The process comprises the steps: preparing an aqueous solution, of which the total concentration of copper nitrate, zinc nitrate and aluminum nitrate is 0.5-2.0mol/L, and an aqueous solution, of which the concentration of sodium carbonate/sodium bicarbonate is 0.5-3.0mol/L, controlling the pH value of precipitating mother liquor to 6.5 to 8.5 at the temperature of 50 DEG C to 80 DEG C while carrying out stirring, carrying out a reaction, carrying out aging for 0.5 to 4 hours at the temperature of 60 DEG C to 90 DEG C, then, washing precipitates with deionized water, preparing a suspension, of which the solid content is 5% to 30%, from the washed precipitates by using deionized water, and carrying out spray drying; and finally, roasting the dried precipitates for 1 to 5 hours in an air atmosphere at the temperature of 300 DEG C to 400 DEG C, thereby obtaining the catalyst. According to the process for synthesizing the methanol catalyst, the process is simple, the operating conditions are mild, and particularly, the particle size of the catalyst prepared by adopting spray drying reaches a micron scale; and proven by gas-liquid-solid three-phase slurry-bed reactor tests, the synthesized catalyst is high in activity and good in stability. The bottleneck that a process for synthesis of methanol by a gas-liquid-solid three-phase slurry bed, which has many advantages and very superior economical efficiency, cannot be industrially generalized extensively due to the fact that proper high-stability catalysts capable of being applied to the gas-liquid-solid three-phase slurry-bed methanol synthesis process are absent is thoroughly solved.

The present invention discloses a polycrystalline diamond composite sheet preparation process. According to the present invention, a nanometer catalytic and high-temperature and high-pressure gradient synthesis technology is used; the particle size ratio of the raw material diamond and the catalysis and synthesis process are adjusted to regulate the microstructure and the composition of PDC so as to achieve the regulation and the optimization on the functions of the PDC composite sheet, such that the PDC is further subdivided into three types such as the anti-impact PDC, the wear-resistant PDC and the high-temperature-resistant PDC from the performance so as to obtain the three functional PDC, achieve the functional subdividing on the current market products, and meet the functional requirements of the drilling tool cutting teeth on different working conditions and geological microenvironments; and the stratum adaptability and the performance price ratio of the drilling bit can be significantly improved, the drilling efficiency and drilling bit service life can achieve rational balance, the performances of the PDC can be well provided, and the hard alloy resources can be saved.

The invention discloses a production method of candy-preserved watermelon rind. The production method is characterized by comprising the following steps: treating the raw materials, cutting the watermelon rind, cooking the watermelon rind by sugar, drying, sterilizing, cooling, packing and obtaining the final product. The production method has the following beneficial effects: the watermelon rind is not used in food processing before, so that a problem of resource waste is caused; but the problem is solved by the production method disclosed by the invention. Moreover, the candy-preserved watermelon rind has beautiful color and luster as well as a unique sour-sweet and crispy flavor.

The invention discloses a polyurethane shape memory polymer material synthesis technology. The synthesis technology solves the problem that the shape memory polymer material prepared through the prior art has poor shape memory effects, poor water resistance, ventilating and moisture permeability of the product, produces color change after fabric arrangement and has small practical value. The synthesis technology orderly comprises 1, raw material vacuum dehydration, 2, prepolymerization: adding 2, 4-toluene diisocynate and DMF into a reactor in a N2 protective atmosphere and dropwisely adding polyol into the reactor according to a stoichiometric ratio so that a prepolymer is produced, 3, chain extension reaction: carrying out a chain extension reaction process on 1, 4-BDO and dimethylolpropionic acid (DMPA), and 4, neutralization reaction: completely neutralizing carboxyl of the DMPA through triethylamine (TEA) and simultaneously, adding 300-1000ml of water into the reaction system to obtain a solution with a mass concentration of 15-25%.

The invention relates to a pump machining technology. The production method of the pump machining technology comprises the steps that a fixed mold and a movable mold keep in contact with each other to form a cavity, and a combined mold is locked; the fixed mold is provided with a channel connected with a vacuum pump, the vacuum pump pumps air in the cavity out, and then the cavity is vacuum; molten metal is poured into the cavity, and the poured molten metal sequentially enters a horizontal runner and an inner runner from a sprue and then enters the cavity for bottom pouring; when the poured molten metal reaches the top of a riser from bottom to top, pouring is completed, and then an exothermic compound is added into the riser; after a casting is completely cooled, the mold is opened; after cleaning and de-gating, heat treatment is conducted. The pump machining technology is simple, practicable and reliable, and the quality of the pumps produced according to the pump machining technology is substantially improved.

The invention discloses a process for jointly producing melamine, sodium carbonate and ammonium chloride by using urea. According to the process, a method which comprises seven steps, i.e., carrying out melamine producing, carrying out bittern or brine refining and exhaust gas absorption, carrying out re-carbonatation alkali separating, carrying out sodium carbonate separating, carrying out sodium bicarbonate mother liquor decomposing, rectifying and denitrifying, carrying out evaporation concentration on deaminated liquor so as to separate sodium chloride, and separating ammonium chloride from a salt clear solution is adopted, the overall utilization ratio of the urea reaches 100%, and exhaust gases generated from melamine production are fully utilized; and a great deal of residual heat and a large volume of steam resulting from a melamine preparation process are also fully utilized, so that energy is saved.

The present invention discloses a TBHQ crude product synthesis process, which comprises: 1) pouring 2-5 parts by weight of phosphoric acid and 0.2-0.5 part by weight of water into a stirring jar, adding 4-6 parts by weight of hydroquinone to the stirring jar, and stirring; 2) after the stirring, placing the mixed solution into a reaction kettle, heating to a temperature of 50-69 DEG C, and pouring 7-10 parts by weight of tert-butanol to the reaction kettle; 3) heating to a temperature of 73-83 DEG C, carrying out thermal insulation for 2-3 h, and carrying out a reaction; and 4) carrying out centrifugation separation on the reaction product, carrying out water washing, and dewatering to obtain the TBHQ crude product. According to the TBHQ crude product preparation process of the present invention, the water is adopted as the solvent while the use of the toluene as the solvent is abandoned, such that the pollution is low, the raw material utilization rate is high, and the TBHQ purity in the obtained TBHQ crude product is high.

The invention discloses a grain refining casting method for a high manganese steel casting. The method comprises the following steps: during a smelting process of the high manganese steel, discharging molten steel from a furnace at high temperature, blowing argon and feeding wire for refining after discharging from the furnace, and strictly controlling the content of phosphorus and sulfur in the molten steel; during a pouring process of the high manganese steel casting, adding metallic particles by following the flow, reducing molten metal storage energy and quickening the cooling of the casting, adding the metallic particles into a pouring system of the casting in the middle and later periods of the whole pouring process, uniformly adding at one time or in batches, quickly pouring the casting, and adopting a bottom leakage package for preventing impurities from being involved. According to the method provided by the invention, the defect of the ultrahigh temperature of the molten steel in the prior art is overcome and the nucleation particle refining grains are added, so that the problems of thick grains, loosening, micro-cracks, and the like of the high manganese steel casting are solved, the high manganese steel casting with grain refinement and high strength is produced, and the casting quality is effectively ensured.

The invention discloses a casting process of a high-strength bearing connector, which comprises the following steps: (1) using resin sand as a raw material, (2) using the resin sand to make a sand mold, and forming a resin sand mold after matching a mold box; (3) ) making pouring liquid, (4) heating the above-mentioned raw materials to the smelting temperature in an electric furnace, (5) pouring the casting liquid into the resin sand mold through a centrifugal process, and forming a bearing connector casting after solidification; (6) The casting of the bearing connector in step (5) is processed and formed by machine tool finishing. The casting process of the high-strength bearing connector of the present invention is simple and of high quality.

The invention discloses a high manganese steel casting grain refining casting method. The method comprises: in a smelting process of high manganese steel, molten steel tapping off at high temperature, after tapping, blowing argon out of a furnace, and performing ladle refining with wirefeeder, strictly controlling phosphorus and sulphur contents in molten steel; in a pouring processing of the high manganese steel casting, adding metal particles with flow, to reduce energy storage of molten metal and accelerate cooling of the casting, the metal particles being added from a gating system of the casting, adding time being the middle and the later periods of the whole pouring process, adding in one time or in batches, pouring the casting rapidly, and using a bottom drain bag to prevent inclusion and involvement. The method overcomes the disadvantage in the prior art that temperature of molten metal is too high, and nucleation site refined grains are increased, so as to solve problems of coarse, loose, and microcracks of high manganese steel casting grains, and the high manganese steel casting which is refined in grains and high in strength is produced, and casting quality is effectively ensured.

The present invention discloses a heavy oil emulsifying viscosity reducer synthesis process based on sulfonation degree control. The heavy oil emulsifying viscosity reducer synthesis process comprises: (1) carrying out a condensation reaction of octyl phenol polyoxyethylene ether and formaldehyde; (b) carrying out a sulfonation reaction of a co-polycondensate and concentrated sulfuric acid, and controlling the sulfonation degree during the reaction process at 0.70-0.95; and (c) neutralizing to prepare the heavy oil emulsifying viscosity reducer. According to the present invention, the heavy oil emulsifying viscosity reducer is successfully synthesized, the synthesis efficiency is high, the synthesis cost is low, and by controlling the sulfonation degree during the reaction process, the product stability is improved.

The present invention discloses a leather composite red-brown dye synthesis process, which comprises material preparing, diazotization, first coupling, second coupling, and spray drying. According to the present invention, the two intermediates having the similar molecule structure and the close molecular weight are selected, wherein one can produce the direct dye, and the other can produce the weak acid dye, the diazotization conditions, the coupling conditions and the used coupling components of the two intermediates are the same, and after the two intermediates are mixed, the diazotization reaction can be performed in the same reaction tank.

The present invention discloses a low-chlorine polyphenylene sulfide resin synthesis process. According to the present invention, sodium sulfide and p-dichlorobenzene are adopted as raw materials, N-methyl-2 pyrrolidone is adopted as a solvent, and a molar ratio of the sodium sulfide to the p-dichlorobenzene is 1 :1; and the synthesis process mainly comprises that at a sodium sulfide dewatering treatment stage, a water absorption column of a five-layer 18 cm/layer 5 angstrom molecular sieve is used to carry out thermal insulation water absorption on a sodium sulfide solution to obtain the sodium sulfide solution with a water content of 1.2-1.5 mol/mol Na2S, and the molar mass of added NaOH is 0.1-0.3 mol/mol Na2S, and at a condensation polymerization stage, 0.1-0.05 mol/mol Na2S of Na2SO4 and 0.01 mol/mol Na2S of H2S are added. According to the present invention, the product has characteristics of low total halogen element content, low polydispersity coefficient, narrow molecular weight distribution, high oxygen index and excellent electrical insulation property, and can be used as the packaging material of electronic devices.

The present invention discloses a 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone synthesis process, which is characterized in that isobutyric acid is adopted as a raw material, an acylation reaction, a Friedel-Crafts reaction, and an alkaline hydrolysis reaction are performed to obtain a 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone crude product, and fine steaming is performed to obtain the 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone finished product. According to the present invention, the process is reasonable, no sulfur dioxide gas emits during the production process, the environmental pollution caused by the produced sodium chloride is low, and the product yield is high.

The invention discloses a synthetic process of a coal-series kaolin X-type zeolite molecular sieve. The synthetic process includes the steps of 1) fully dissolving the kaolin and sodium silicate in water in a reaction kettle, slowly adding sodium hydroxide under intensive stirring, adding a crystal seed, and stirring and aging the mixture for 4-6 h at room temperature; and 2) performing stirring crystallization at 60-80 DEG C for 2-4 h, and continuously performing stirring crystallization at 90-100 DEG C for 12-48 h, and washing a crystallized product with water until pH is 11, and drying the product to obtain the X-type zeolite molecular sieve. In the invention, the coal-series kaolin from the Inner Mongolia is employed to replace conventional chemical engineering raw materials, so that the process is low in cost. The X-type zeolite molecular sieve is higher than 32.4 wt% in water absorbency rate. The process also increases utilization rate and additional value of the coal-series kaolin from the Inner Mongolia and also has the advantage of saving energy and reducing emission, and comprehensively utilizing resources.

The present invention discloses a chemical synthesis process for preparing gastrodin and similar phenolic glucoside represented by a formula (I) thereof. According to the present invention, industrial easily-available raw materials such as acetic anhydride and acetyl bromide or PHOSPHORUS TRIBROMIde or phosphorus pentabromide are used to complete the hydroxy protection of glycosyl and the bromination reaction of hemiacetal hydroxy, such that the problems that the use of red phosphorus and bromine during the gastrodin bulk drug production process causes physical and psychological harm on production workers and environment pollution and damage are solved; and the process mainly comprises two steps of key reactions, wherein the first step reaction is synthesis of bromoacetyl glycosyl compound, and the second step reaction is condensation of the bromoacetyl glycosyl compound and a phenolic compound to generate the acetyl-protected phenolic glucoside compound.

The invention discloses a synthetic process for a degradable milk protein fiber blend fabric. The synthetic process is characterized in that the process comprises: firstly, an effective synthetic process is used to obtain high molecular weight nanocrystalline iron oxide combined with poly(butylene succinate), and the nanocrystalline iron oxide combined with poly(butylene succinate) is spun to polyester fibers, then using milk protein fibers and nanocrystalline iron oxide combined with poly(butylene succinate) fibers to blend, the specification of the nanocrystalline iron oxide combined with poly(butylene succinate) fiber is 1.56-1.65 detx x 38 mm, and the specification of the milk protein fiber is 1.56-1.65 detx x 38 mm, to obtain the degradable milk protein fiber blend fabric.

The invention discloses a method for manufacturing an ox-tail chafing-dish food, and mainly aims at solving the problem that meat of an existing ox-tail chafing-dish food is separated from bones or is too raw to chew. The method is characterized by comprising the following steps of (1) putting ox tails in boiling water to remove blood and slime; (2) boiling the ox tails with base materials and condiment; (3) boiling the ox tails with red dates, Chinese wolfberry fruits, well-cooked peanut kernels and soybeans; (4) filling a hot pot with the materials for later use; and (5) uncovering the hot pot for eating after thoroughly burnt charcoal is added for 3-5 minutes, or sterilizing the ox tails prepared in the step (3) and encapsulating the ox tails in food bags. By adopting the method, the ox tails have the characteristics of complete appearance, golden color, tender bones, delicious meat and good taste, and can be taken frequently without boring.

The invention discloses a making method of non-deep-fried highland barley instant noodles. The making technology of the non-deep-fried highland barley instant noodles is characterized by comprising the following steps of performing grinding so as to obtain powder, adding materials, performing dough making, performing shaping, performing steaming, performing drying and the like, wherein in the step of adding materials, the amount of highland barley powder accounts for 50-100% of the total weight of dried raw materials; in the step of dough making, the addition amount of water is 30-35% of the total weight of the dried raw materials, the water temperature is 25-30 DEG C, and the dough making time is 10-20 minutes; in the step of shaping, non-puffing extrusion equipment is used. Through adoption of the technology, the non-deep-fried highland barley instant noodles from full highland barley powder can be made, the scientific and technological content and the added value of highland barley foods are substantially increased, and the non-deep-fried highland barley instant noodles become a healthy instant food which can be accepted by most people.

The present invention discloses a processing technology of potato starch and solves the problem that a processing technology of potato starch which is safe and high in quality is still lacked currently. The specific steps of the processing technology are as follows: washing and grinding; screening; launder separating and cleaning; fermenting: starch liquid and secondary starch liquid are introduced into a tank cylinder, then hot water with amount being1/3 of the total amount of the starch liquid and at a temperature of 80 DEG C is added, and fermentation is carried out for 25 hours; the fermented starch liquid is taken out, after the starch liquid presents a solid state, clean water is added, precipitation is carried out for 15 hours, then diluting is carried out by adding clean water, and the concentration of the starch liquid is adjusted to be 45-67%; and (5) dehydrating and drying: dry starch with a balanced water content of 23% is obtained. The processed starch is high in quality, green and safe, and suitable for industrial production.

The present invention discloses a p-nitro tribromotoluene synthesis process, which is characterized in that in a first-step reaction, p-nitro toluene is added to a reaction kettle, a tail gas absorption device is opened, hydrogen bromide and excess bromine produced from the reaction are absorbed with water, the reaction temperature is controlled at 130-180 DEG C, bromine is added in a dropwise manner, the reaction time is controlled at 3-8 h, p-nitro dibromotoluene is generated through the reaction, and cooling is performed to a temperature of 60-80 DEG C; and in a second-step reaction, carbon tetrachloride, a catalyst BTEAB, sodium hydroxide and water are sequentially poured into the reaction kettle, the temperature is controlled at 40-80 DEG C, bromine is added in a dropwise manner, the reaction time is 2-6 h, filtering is performed to obtain a crude product, the crude product and ethanol are poured into the reaction kettle, stirring and heating reflux are performed for 20-60 min, cooling is performed to achieve a room temperature, and filtering and drying are performed to obtain the finished product. According to the present invention, the whole production process has characteristics of stable operation, easy control, low cost, high yield, and the like.

The present invention discloses a new processing technology of chicken feet with pickled chilies. By studying quality safety controlling means and supporting technologies and optimizing an radiation processing technology, the processing technology conducts a strict fully automated control of material selection, and irradiation doses, time and irradiation box moving method during the irradiation process, improves processing efficiency and utilization of radioactive sources, reduces the economic costs and the use of preservatives, significantly reduces the microbial content of the products, solves the problem of air producing and inflatable products caused by anaerobic bacteria, so that the product quality is improved and people's body health is ensured.

The invention discloses a 2-dimethylaminoethyl chloride hydrochloride synthesis technology. The technology comprises that dimethylethanolamine as a raw material and thionyl chloride directly undergo a chlorination reaction in an ice water bath under control of a temperature in a range of 8-18 DEG C, anhydrous ethanol is added into the reaction product, the mixture undergoes a reflux reaction for 2h, and the reaction product is filtered and dried so that a finished product is obtained. The 2-dimethylaminoethyl chloride hydrochloride synthesis technology has the advantages that 1, the product is free of recrystallization and has a high yield, good quality and a low cost, 2, reaction conditions are mild and are convenient for operation, 3, product purity is high and inorganic salt content is less than 0.5%, and 4, three wastes are reduced, hydrogen chloride and sulfur dioxide gas in the reaction are absorbed and the mother liquor subjected to pumping filtration is free of after treatment and is subjected to waste liquid delegation treatment so that environmental protection is promoted.