41 results about "Thiodiethylene Glycol" patented technology

A silver and silver alloy plating bath, includes (A) a soluble salt, having a silver salt or a mixture of a silver salt and a salt of a metal such as tin, bismuth, indium, lead, and the like; and (B) a particular aliphatic sulfide compound, such as thiobis(diethyleneglycol), dithiobis(triglycerol), 3,3′-thiodipropanol, thiodiglycerin, 3,6-dithiooctane-1,8-diol, and the like, which contain at least one or more of an ether oxygen atom, a 1-hydroxypropyl group, a hydroxypropylene group, or two or more of a sulfide bond in the molecule, and not containing a basic nitrogen atom. Compared to baths containing aliphatic monosulfide compounds, such as thiodiglycol or beta-thiodiglycol, which do not contain an ether oxygen atom, 1-hydroxypropyl group, a hydroxypropylene group, or two or more of a sulfide bond in the molecule, by having these particular compounds, the plating bath of the present invention has excellent stability over extended time, excellent co-deposition of silver and various metals, and excellent appearance of the electrodeposition coating.

An insulated DC-cable and method for production of an insulated DC-cable with an insulating system comprising an extruded cross-linked polyethylene based insulation disposed around the conductor. The extruded polyethylene based compound comprises additives such as cross-linking agent, scorch retarding agent and antioxidant. The scorch retarding agent comprises a compound (D), 2,4-diphenyl-4-methyl-pentene-1 and the antioxidant comprises a compound (C), a diester of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionicacid and thiodiglycol. The compounded polyethylene based resin composition is extruded and cross-linked at a temperature and for a period of time sufficient enough to cross link the insulation. The temperature and the period of time upon extrusion and cross-linking are limited so as to substantially suppress or essentially avoid undesired polar by-products being formed in the cross-linked composition.

An additive mixture for lubricant oils includes an overbased alkaline earth metal sulfonate, and at least one friction modifier selected from the group consisting of an overbased alkaline earth carboxylate, the reaction product of an alkanolamine with a fatty acid or a fatty acid ester and the reaction product of thiodiglycol or a dialkylene glycol with a fatty acid or a fatty acid ester. The additive mixture, when combined with a lubricant stock, provides a lubricant composition characterized by less sedimentation during storage.

A low-silver-bearing printed circuit board silver paste comprises, by weight, 1 part to 2 parts of glucose, 20 parts to 30 parts of nanoscale sheet cooper powder, 30 parts to 40 parts of 1-micrometer to 20-micrometer sheet silver powder, 13 parts to 16 parts of glass powder, 5 parts to 7 parts of hyperbranched polyester resin, 5 parts to 8 parts of terpilenol, 2 parts to 5 parts of sulfo-diglycol, 2 parts to 4 parts of bisphenol A epoxy resin, 6 parts to 8 parts of butyl carbitol, 7 parts to 9 parts of acetic ether, 1 part to 2 parts of nanometer titania, 1 part to 2 parts of nanometer crystalline cellulose, 3 parts to 5 parts of nanometer tantalum carbide powder and 3 parts to 5 parts of nanometer niobium carbide powder. According to the low-silver-bearing printed circuit board silver paste, the nanoscale sheet copper powder, the nanometer tantalum carbide powder and the nanometer niobium carbide powder are added, so that the good conductive performance is kept, and the use amount of the silver powder is saved; the glass powder does not contain lead and is environmentally friendly and good in caking property, and a circuit is firm; the organic vehicle solvents are sequentially volatilized, the high temperature resistance is good, the printing performance is good, and the circuit yield is high.

The invention relates to a preparation method of a thiophenol compound antioxidant product, relating to the technical field of preparation of antioxidant products. A process technical method of the thiophenol compound antioxidant product comprises the following steps of: taking 3, 5-methyl ester and thiodiglycol as raw materials, performing ester exchange reaction under the actions of a catalyst and a color blocking agent, and generating a reaction product mixed solution containing 2, 2'-thiodiethyl bis(3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate by continuously removing a byproduct, namely methanol during the reaction process; adding an appropriate amount of phosphite ester-like compound into the reaction product mixed solution, and generating a new phosphite ester-like compound by secondary ester exchange reaction; and selecting a recrystallization solvent, performing recrystallization and refining on the reaction product mixed solution, and performing solid-liquid separation to obtain a while granular crystal product.

The invention provides a preparation method of thiodiethanethiol. The preparation method comprises the following steps: a) mixing thiodiglycol, thiourea and hydrochloric acid to carry out a salt forming reaction and then adding an alkaline solution for hydrolysis reaction to obtain a reaction mixture; b) skimming the reaction mixture obtained in the step a) to separately obtain a thiodiethanethiolcoarse product and reaction wastewater; and then washing the thiodiethanethiol coarse product to separately obtain thiodiethanethiol and washing waste water; and c) separately flocculating the reaction waste water and the washing waste water obtained in the step b) to obtain circulating water. Compared with the prior art, the preparation method provided by the invention has relatively high product quality and yield, and can achieve circular use of waste water. Experimental results verify that the content of thiodiethanethiol prepared by the preparation method is stabilized at over 99%, and the yield is over 98%, and zero discharge of the waste water is achieved.

The invention discloses a synthetic method for epoxy end group polythioether liquid rubber. The method comprises the following steps: synthesizing sulphydryl end group polythioether liquid rubber by using thiodiglycol, hydroxyethyl-2-hydroxypropyl thioether and the like as main monomers; then using polyethylene glycol diglycidyl ether resin as a transforming agent so as to transform a sulphydryl end group into an epoxy end group so as to finally generate the end group polythioether liquid rubber. The technology has the advantages that the polyethylene glycol diglycidyl ether resin is adopted as the transforming agent of the end group, the defects that the viscosity of a sulphydryl in traditional epoxy modification technology is high, solvents of toluene, butanone and the like are needed to perform dilution, the reaction exotherm is violent, and a side effect is easy to generate are overcome; reactions are smooth, the product quality is easy to control, the viscosity of the generated epoxy end group polythioether liquid rubber is moderate, and the stability is good; the strength of epoxy resin and the toughness and the heat resistance of polythioether rubber are reserved after the end group is transformed, so that the brittleness of the epoxy resin is improved, and the adhesive property of materials is improved.

The invention discloses an anti-corrosion PE water supply pipe and a preparation method thereof. The pipe is prepared from the following raw materials by weight part: 46-62 of ultra-high molecular weight polyethylene, 22-36 of polyphenylene sulfide, 12-24 of a liquid crystal polymer, 10-15 of terpene resin, 16-22 of precipitated barium sulphate, 10-15 of magnesia, 8-14 of nano-calcium titanate, 2-3 of dibasic lead phthalate, 1.5-2.5 of zinc ricinate, 1-2 of barium ricinate, 2-3 of trimethylolpropane, 1-2 of thiodiethylene glycol bis(beta-aminocrotonic acid)ester, 1.5-2.5 of stearoylbenzoylmethane, 2-4 of docosanamide, 3-5 of glycerol triacetylricinoleate, 4-8 of solid paraffin, 22-28 of filling masterbatch, 10-15 of liquid nitrile rubber, 1-2 of 1, 4-cyclohexanedimethanol dibenzoate, and 1-2 of N, N'-bis[beta-(3, 5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine. The PE pipe provided by the invention has excellent resistance to chemical corrosion, can resist erosion of a variety of chemical mediums, especially acid, alkali, salt and oil, and is free of electrochemical corrosion, has strong adaptability to the environment, does not rot or corrode after long-term use, and is durable in use.

The present invention discloses a comprehensive utilization method of sodium hydrosulfite waste residue. The comprehensive utilization method comprises that: (1) a vacuum distillation method is adopted to remove water in sodium hydrosulfite waste residue and concurrently obtain ethylene glycol; (2) the remaining waste residue obtained from vacuum distillation is washed by using an organic solvent to obtain an organic phase I and a solid A; (3) according to different solubilities of the solid in the solvent, sodium isethionate and sodium formate can be obtained; and (4) the organic phase I is subjected to vacuum distillation to recover the solvent and concurrently obtain thiodiglycol. According to the invention, the waste residue produced in the sodium hydrosulfite production process is subjected to comprehensive utilization and is purified to obtain four organic products, such that enterprise waste emission is reduced while economic benefits and social benefits are brought to enterprises.

The invention relates to a synthesis method of a thioether phenolic antioxidant, which comprises the steps of synthesizing 2,2'-thiodiethyl bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] by taking 3-(3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and thiodiglycol as raw materials and using a supported ester exchange catalyst. The supported transesterification catalyst provided by theinvention is low in dosage, cheap, easy to obtain, efficient and easy to separate, and can be recycled for multiple times, and meanwhile, the problem that the product quality is influenced by catalystresidues in the reaction is solved.

The invention discloses a retarding water-reducing crack arresting agent. The retarding water-reducing crack arresting agent is prepared from the raw materials in parts by weight: 24-36 parts of sodium lignosulfonate, 14-26 parts of calcium propionate, 15-25 parts of bischofite powder, 48-54 parts of UNF-5 type efficient water-reducing agent, 35-45 parts of FDN-II type efficient water-reducing retarder, 10-15 parts of poly(methacrylate hyroxyehthyl ester), 10-15 parts of nano-carbon fiber, 7-11 parts of potassium dihydrogen phosphate, 4-8 parts of wormwood seed powder, 6-9 parts of sodium meta-aluminate, 10-15 parts of manganese slag, 3-6 parts of p-toluene sulfonic acid, 4-7 parts of benzotriazole, 4.5-6.5 parts of dithiodiglycolic acid, 2-4 parts of hydroxyethyl oil acid imidazoline betaine and 4-6 parts of promoter. The retarding water-reducing crack arresting agent has the characteristics of high shrinkage rate, strong crack resistance, strong toughness and strong freezing resistance, can be used for effectively reducing the shrinkage of concrete and preventing dry-shrinkage cracks, and also has the effect of efficient water reduction, and the water-reducing rate can be 15-25%. With the adoption of the retarding water-reducing crack arresting agent, the workability and the fluidity of fresh concrete are obviously improved, the bleeding and segregation phenomena do not occur after the concrete is mixed, the retarding effect is good, the slump loss is little, and the long-distance transportation is facilitated.

A water-based ink for stencil printing, which comprises an unsaturated carboxylic acid-based water-soluble polymer and triethylene glycol. The ink preferably further comprises β-thiodiglycol as an optional component.

The invention discloses a sound-absorbing cotton material and a preparation method thereof. The cotton material comprises the following components in parts by weight: 100-120 parts of polypropylene, 0.05-1 part of a hindered phenolic antioxidant, 0.05-1 part of a phosphite antioxidant, 0.02-0.5 part of an acid absorbing agent, and 0.05-1 part of a combination synergist. According to the invention,combined action of the hindered phenolic antioxidant and the phosphite antioxidant in the components can realize higher stability and oxidation resistance of the component material; and the combination synergist selects thiodiglycol distearate and / or distearyl thiodipropionate, so that synergistic effects produced between the combination synergist and the hindered phenolic antioxidant enhance theoxidation resistance of the material, and enhances the yellowing resistance of the material.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of thiodiethanethiol, wherein the preparation method particularly comprises the steps: introducing thiodiethylene glycol and hydrogen sulfide into a mixer, sufficiently mixing, carrying out pressurized introduction of the thiodiethylene glycol by a pump, and introducing the hydrogensulfide under the reduced pressure by a steel cylinder; enabling the uniformly mixed raw materials to pass through a fixed bed reactor filled with a catalyst from bottom to top, and carrying out a reaction of thiodiethylene glycol with hydrogen sulfide to generate thiodiethanethiol; and enabling the reacted product and unreacted hydrogen sulfide to enter a separator, pressurizing the hydrogen sulfide from the upper part of the separator for recycling, and producing the product from the lower part of the separator. The hydrogen sulfide is adopted to replace thiourea, hydrochloric acid, alkali and other chemicals in the original process, the cost is reduced, no three wastes are generated, the fixed bed reactor is adopted, the device is a continuous reaction device, the operation is simple, the reaction is sufficient, and side reactions are reduced.

The invention relates to a preparation method of N-(4-(2-ethylhexyloxy) phenyl)-1, 1-dioxothiomorpholino. The method is characterized by comprising the following steps of: adding 10 parts by weight of thiodiglycol and 10 parts by weight of water to a reaction kettle, then adding 1-2 parts by weight of quaternary ammonium salt as a catalyst, adding 65-75 parts by weight of hydrogen peroxide dropwisely into the reaction kettle, after dropping, preserving the heat of the mixture and allowing it to stand for one hour so as to generate bishydroxyethylsulfone, adding p-aminophenol to conduct a condensation reaction for 3 hours, then adding bromoisooctane for a further condensation reaction for 3 hours, pouring n-heptane into a product stock solution, stirring the solution and allowing it to stand, taking out the extraction phase and evaporating the solvent to dryness, thus obtaining a finished product. Application of the method provided in the invention can prepare products with an overall yield of over 86% and effective content of more than 98%, so the method is completely applicable to large scale industrial production. With substantial economic benefit, social benefit and ecological benefit, the method provided in the invention fully meets the requirements of safety, environmental protection and high efficiency that are advocated by the nation in developing low carbon economy.

The invention relates to a synthesis method and production technology for bis (2-mercaptoethyl) sulfide. The method uses thiodiglycol and thiourea as raw materials to synthesize target products after two reacting steps of substitute salifying and alkaline hydrolysis, product purity is larger than 99%, total yield of the two steps is improved to more than 98% on the basis of 80% in the existing technology. The synthesis method has the advantages of being free of rigor conditions in production, smooth and safe in operation, less in three wastes, high in product purity, low in production cost and the like and is suitable for being applied to industrial production.

The invention discloses a heteroatom-containing high-barrier biodegradable copolyester and a preparation method and application thereof. The copolyester is mainly prepared by esterification and polycondensation of aliphatic diol and aliphatic dibasic acid, in the polyester synthesis process, aromatic dibasic acid, 2, 2 '-thiodiethylene glycol and a monomer 2-ethyl-2-butyl-propylene glycol containing a side chain group are introduced into a molecular chain of the polyester, the barrier property of the polymer is improved by utilizing the polarity of heteroatoms and the steric hindrance of the side chain group, meanwhile, the hydrophilic property of the copolyester is improved by introducing sulfur atoms; the obtained copolyester has excellent mechanical properties, high barrier property andbiodegradability, and can be widely applied to the fields of food preservation, agricultural film water retention, barrier bottles, textile fibers and the like.

The invention discloses a synthesis method of an inert end group polythioether polymer, which comprises the following steps of: (1) mixing raw materials styrene and mercaptoethanol according to a molar ratio of 1: (1-1.3), adding a catalyst A, reacting under heating conditions to generate a 1-hydroxy-3-thia-5-phenyl pentane crude product, and rectifying the crude product to obtain 1-hydroxy- 3-thia-5-phenyl pentane; (2) mixing the 1-hydroxy-3-thia-5-phenyl pentane obtained by rectification with thiodiethylene glycol according to a molar ratio of 1: (3.0-4.5), adding a catalyst B, and then heating to carry out a hydroxyl dehydration polycondensation reaction; and (3) after solvent extraction, removing low-boiling-point substances under a vacuum heating condition to obtain the inert end group polythioether polymer. The problem that an existing plasticizer for a polythioether sealant is poor in temperature resistance, poor in compatibility and the like is solved, the comprehensive performance of the sealant is improved, and the used raw materials are cheap, easy to obtain and stable in reaction.

The invention discloses zinc-aluminum coating anti-corrosion paint. The paint is composed of two-components of A and B in a mass ratio of 3:1, wherein a component A comprises the following raw materials: zinc aluminum alloy powder, nano-silica, sodium lignosulphonate, benzotriazole, thiodiethylene glycol, amino trimethylene phosphonic acid, sodium carboxymethylcellulose and deionized water; a component B comprises the following raw materials: zircinium fluoride, gamma-aptes, inositol hexaphosphate, cellaburate, ethanol and the deionized water, wherein the zinc aluminum alloy powder is composedof Zn, Al, Ti, Ni, Mg and Mn. According to the zinc-aluminum coating anti-corrosion paint and the preparation method thereof, excellent corrosion resistance and impact resistance are acquired and a deficiency that the production process of triphenylphosphine in the prior art has potential dangers on environmental safety and operators is compensated by means of adjusting mass ratio of each component of the zinc aluminum alloy powder on the basis of replacing the triphenylphosphine with the amino trimethylene phosphonic acid and the sodium carboxymethylcellulose.

The invention discloses a method for continuously synthesizing thiodiglycol. The method is based on a tubular reactor, ethylene oxide and sulfureted hydrogen serve as raw materials, the reaction is performed at 0-40 DEG C, and thiodiglycol is synthesized by liquid phase catalysis at normal temperature and normal pressure. The operation is simple, the conditions are mild, the method is green, environmentally friendly and free of three wastes, and a catalyst can be reused; the reaction standing time is short, no back-mixing occurs, no by-product is generated, slightly excessive ethylene oxide can be recycled, the production cycle is shortened, and the production cost is reduced. The tubular reactor can react continuously, the product purity can reach 98-99.5%, and the yield of thiodiglycol can reach 92-99% according to hydrogen sulfide.

The invention relates to the food and medical industries, medical cosmetics, dermatology, agriculture and the mixed feed industry. According to the invention vicinal dithioglycole (common formula RCH(SH)CH(SH)R−1 (I)) is used as a food additive, a food product, physiologically-active substances and active ingredients of forage additives and of forage, in cosmetic and / or dermatological and skin-therapeutic remedies. The invention comprises methods for producing such additives, products and remedies. The substance of formula (I) stimulates physiological processes, increases human and animal immunity, inhibits undesirable process in organisms and food products, produces curative and preventive action of skin, hair and nails and after vicinal dithioglycole is administered the intoxication effect of alcohol consumption known as hang-over is completely remored.

The invention discloses an oxidation resistance reinforcing strip metallic aluminum pigment. The pigment is prepared from the following raw materials in parts by weight: 70-75 parts of flaky aluminum powder, 14-15 parts of methacryloxy propyl trimethoxyl silane, proper amount of absolute ethyl alcohol, 28-30 parts of trimethylolpropane triacrylate, 1-1.2 parts of acrylic acid, 0.09-0.1 part of azodiisobutyronitrile, 1.75-1.9 parts of polyvinylpyrrolidone, 2.5-3 parts of N,N-ethylidene bisricinoleamide, 17-19 parts of polypropylene, 1.5-2 parts of antioxidant 1010, 3-3.5 parts of thiodiglycol, 2-2.5 parts of lauric acid and 0.05-0.06 part of p-toluenesulfonic acid. The pigment can obviously reinforce the oxidation resistance of the products, can be uniformly dispersed in plastic materials and has high storage stability by preparing an antioxidant through reaction between thiodiglycol and lauric acid, mixing the antioxidant with the antioxidant 1010, then internally mixing the mixture with polypropylene and then adding the mixture to the products.

The invention discloses a synthetic method for epoxy end group polythioether liquid rubber. The method comprises the following steps: synthesizing sulphydryl end group polythioether liquid rubber by using thiodiglycol, hydroxyethyl-2-hydroxypropyl thioether and the like as main monomers; then using polyethylene glycol diglycidyl ether resin as a transforming agent so as to transform a sulphydryl end group into an epoxy end group so as to finally generate the end group polythioether liquid rubber. The technology has the advantages that the polyethylene glycol diglycidyl ether resin is adopted as the transforming agent of the end group, the defects that the viscosity of a sulphydryl in traditional epoxy modification technology is high, solvents of toluene, butanone and the like are needed to perform dilution, the reaction exotherm is violent, and a side effect is easy to generate are overcome; reactions are smooth, the product quality is easy to control, the viscosity of the generated epoxy end group polythioether liquid rubber is moderate, and the stability is good; the strength of epoxy resin and the toughness and the heat resistance of polythioether rubber are reserved after the end group is transformed, so that the brittleness of the epoxy resin is improved, and the adhesive property of materials is improved.

The invention discloses a high-temperature-resistant and ageing-resistant silicone rubber material for a battery heat isolation film frame and a preparing method of the high-temperature-resistant and ageing-resistant silicone rubber material. The high-temperature-resistant and ageing-resistant silicone rubber material is prepared by following raw materials including, by weight, 44-57 parts of phenylene silicone rubber, 13-19 parts of pentaerythritol ester of hydrogenated rosin, 2-4 parts of methyl 2-benzoylbenzoate, 14-22 parts of hollow nano silicon dioxide microspheres, 4-6 parts of iron oxide, 3-5 parts of tungsten oxide, 10-15 parts of glass wool waste, 12-18 parts of tetra-(2-ethylhexyl)pyromellitate, 2-3 parts of 2,4-DCBP, 5-9 parts of hydroxyl-fluoro silicone oil, 4-6 parts of zinc carbonate, 11-17 parts of picrite basalt, 1-3 parts of dithiodiglycol dimyristictate, 1-2 parts of an accelerant DPTT and 1-2 parts of an anti-aging agent KY-405. The hollow nano silicon dioxide microspheres and the like are adopted as filler so that the material heat conduction coefficient can be reduced and meanwhile the materials are reinforced. The iron oxide, the tungsten oxide and the like serve as an oxidizing agent to be matched with pentaerythritol ester of hydrogenated rosin to be used, the high-temperature using temperature of the materials can be increased, the long-term using temperature can reach 250-300 DEG C, the ageing resistance of the materials can be improved as well, and the service life of the materials is greatly prolonged.

The invention relates to a method for synthesizing 9-hydroxy-4-oxa-7-thianonene. The method is characterized by comprising the following steps: A, adding solid caustic soda and thiodiglyco into a reaction kettle, slowly raising the temperature to 30 to 50DEG C, and reacting for 1 to 3 hours to generate thiodiglycolic sodium; B, adding chloropropene into a metering tank, then charging materials into the reaction kettle, and dropwise adding the chloropropene at the temperature of 30 to 50DEG C for 1 to 4 hours; after adding, raising the temperature to 80 to 130DEG C, reacting for 1 to 3 hours, and cooling a reaction solution; C, carrying out acidizing, filtering and desalting treatment on the cooled reaction solution to obtain a crude product of 9-hydroxy-4-oxa-7-thianonene; then rectifying, and collecting fractions to obtain colorless or pale yellow transparent 9-hydroxy-4-oxa-7-thianonene. The method disclosed by the invention has the advantages that the raw materials are low in price and easily obtained, and the yield of a product is high; the method is suitable for industrially producing the 9-hydroxy-4-oxa-7-thianonene.

The invention provides a strong anti-aging cable sheathing material and a preparation method thereof, and relates to the technical field of cable sheath production. The cable sheathing material is prepared from the following raw materials, in parts by weight: 45-55 parts of silicone rubber, 20-25 parts of cis-polybutadiene, 10-15 parts of acrylate rubber, 8-12 parts of distearyl pentaerythrityl diphosphite, 2-3 parts of nano cerium dioxide, 0.6-1.0 part of a cross-linking agent, 6-8 parts of 2,6-tert-butyl-4-methylphenol, 3-5 parts of dithiodinglycol distearictate, 5-7 parts of diaryl p-phenylenediamine, 2-4 parts of diallyl phthalate, 2-4 parts of a vulcanizing agent, and 2-4 parts of a dispersing agent. The method provided by the invention overcomes the deficiencies in the prior art, andcan effectively improve the aging resistance of the sheathing material and prevent a cable from being aged under influence of external light, heat and oxygen, and the cable sheath has excellent overall performance, high safety and a long service life, and is suitable for promotion.

The invention relates to a preparation method of a thiophenol compound antioxidant product, relating to the technical field of preparation of antioxidant products. A process technical method of the thiophenol compound antioxidant product comprises the following steps of: taking 3, 5-methyl ester and thiodiglycol as raw materials, performing ester exchange reaction under the actions of a catalyst and a color blocking agent, and generating a reaction product mixed solution containing 2, 2'-thiodiethyl bis(3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate by continuously removing a byproduct, namely methanol during the reaction process; adding an appropriate amount of phosphite ester-like compound into the reaction product mixed solution, and generating a new phosphite ester-like compound by secondary ester exchange reaction; and selecting a recrystallization solvent, performing recrystallization and refining on the reaction product mixed solution, and performing solid-liquid separation to obtain a while granular crystal product.

The invention provides a preparation method of 1,11-di(1-bispiperdine)-3,9-dioxo-6-thia-hendecane. The preparation method comprises the following steps of: (1) adding N,N-dimethylformamide and sodium hydroxide to a reaction container, adding thiodiglycol under stirring at a room temperature, wherein the mol ratio of the thiodiglycol to the sodium hydroxide is 1: (4-12); adding N-chloroethyl piperidine hydrochloride in batches in 0.5-1 hour, wherein the mol ratio of the thiodiglycol to the N-chloroethyl piperidine hydrochloride is 1: (2-4); and reacting for 3-8 hours at a reaction temperature in the range from 40 to 90 DEG C; (2) cooling after the reaction is completed until the temperature reaches the room temperature, adding water and stirring, extracting by using a solvent, washing with water, drying and concentrating, and then performing reduced pressure distillation, thereby obtaining the 1,11-di(1-bispiperdine)-3,9-dioxo-6-thia-hendecane. The preparation method provided by the invention is simple in steps, short in reaction time, simple in after-treatment process, high in yield, low in cost, and convenient for industrial production.

The invention discloses a method for continuously synthesizing thiodiglycol. The method is based on a tubular reactor, ethylene oxide and sulfureted hydrogen serve as raw materials, the reaction is performed at 0-40 DEG C, and thiodiglycol is synthesized by liquid phase catalysis at normal temperature and normal pressure. The operation is simple, the conditions are mild, the method is green, environmentally friendly and free of three wastes, and a catalyst can be reused; the reaction standing time is short, no back-mixing occurs, no by-product is generated, slightly excessive ethylene oxide can be recycled, the production cycle is shortened, and the production cost is reduced. The tubular reactor can react continuously, the product purity can reach 98-99.5%, and the yield of thiodiglycol can reach 92-99% according to hydrogen sulfide.