51results about How to "Reduce thermal decomposition" patented technology

The invention belongs to the field of petrochemical industry, and relates to a production method of isononyl alcohol and a production device of isononyl alcohol. The production method of the isononyl alcohol comprises the following steps: C8 olefin, synthesis gas and a catalyst enter a raw material reactor to react to obtain a hydroformylation reaction product, the hydroformylation reaction product enters a product separation unit to separate and remove by-products, and then the hydroformylation reaction product enters an aldehyde hydrogenation unit to react to obtain the isononyl alcohol. The invention has the following beneficial effects: the product separation unit removes most of non-condensable steam, light components and water through a low-vacuum flash evaporation-high-vacuum evaporation two-stage process, reduces the load of a high-vacuum system, and saves energy consumption; the circulation path of the catalyst is shortened through the efficient and rapid separation process of the catalyst, and decomposition of the catalyst is reduced; by applying the vacuum evaporator, low-pressure and low-temperature rapid separation of materials is achieved, the catalyst circulation process is short, the separation temperature is low, and meanwhile energy consumption is saved.

The invention provides a preparation method of a fiber composite photovoltaic support material, and belongs to the technical field of composite materials. The fiber composite photovoltaic support material is prepared by adding the modified basalt fiber as a composite reinforcing material and then introducing the polyisocyanurate tripolymer and the modified aluminum nitride, and the support material is high in longitudinal tensile strength and has good flame retardant property and heat-conducting property.

The invention relates to the field of high polymer materials, and provides a preparation method and application of composite halogen-free high-phosphorus-content flame-retardant polyester aiming at the problems of non-uniform component dispersion and poor anti-dripping effect of the composite flame-retardant polyester. The preparation method comprises the following steps: mixing dihydric alcohol, terephthalic acid, a catalyst, esterification liquid of the reaction type phosphorus flame retardant and the reaction type nitrogen flame retardant, sequentially carrying out esterification reaction and polycondensation reaction to obtain a melt, and treating the melt to obtain the composite halogen-free high-phosphorus-content flame-retardant polyester. The invention also provides application of the flame-retardant polyester. According to the invention, the reactive phosphorus flame retardant participates in the polyester polymerization process, so that the influence on the molecular regularity of polyester is small, and the crystallization behavior and post-processing performance of slices are not influenced; the apparent viscosity of the polyester is improved by the modified nitrogen flame retardant, the polycondensation time is greatly shortened, and the polyester with lasting flame-retardant effect and good anti-dripping effect is obtained by compounding multiple halogen-free flame retardants.

The invention discloses a preparation method of a lithium ion battery electrolyte, and relates to the technical field of lithium ion battery electrolytes.The preparation method comprises the following steps that S1, single organic solvents, namely diethyl fluoromalonate, fluoroethylene carbonate and dimethyl carbonate are taken and mixed in proportion, and a mixed organic solvent is prepared; s2, preparing a composite lithium salt; and S3, the mixed organic solvent, the composite lithium salt and an additive are taken in proportion and mixed, the lithium ion battery electrolyte is prepared, and the additive is a sulfonate compound and a fluorine-containing sulfonamide compound. According to the invention, by adding the sulfonate compound and the fluorine-containing sulfonamide compound additive, a stable, uniform and thin interfacial film can be formed, the stability of CEI and SEI films can be improved, and the positive and negative electrode materials of the battery can be protected; and the freezing point of the organic solvent is reduced while the ionic conductivity under the high-temperature condition is improved, so that the low-temperature effect of the electrolyte is improved, and the lithium ion battery electrolyte has a wider temperature range.

The invention relates to the technical field of new materials of conveying belts, and discloses a full-polyester-reinforced scratch-resistant wear-resistant whole-core flame-retardant conveying belt for a coal mine and a preparation method of the whole-core flame-retardant conveying belt. Comprising the following steps: adding ethylene propylene rubber into an open mill for plastifying to obtain plasticated rubber; adding calcium carbonate, aluminum hydroxide and a vulcanizing agent into the plasticated rubber, uniformly stirring, and then mixing to obtain a rubber compound; immersing the modified polyester fabric into the mixed rubber, taking out the modified polyester fabric, taking out the redundant mixed rubber on the polyester fabric by using an extrusion roller, then drying, and then vulcanizing to obtain the product. The conveyor belt not only has good scratch and collision resistance and wear resistance, but also has good flame retardant property.

The invention discloses a light reinforced perovskite solar cell module and a production process thereof, and relates to the technical field of solar cells, and the light reinforced perovskite solar cell module structurally comprises a high-transmittance epoxy resin adhesive protection layer, a substrate, a perovskite cell layer, an adhesive film layer and a back plate which are sequentially stacked. The peripheries of the substrate, the perovskite cell layer, the adhesive film layer and the backboard are sealed. According to the perovskite solar cell module, the epoxy resin adhesive protection layer is arranged on the light incident surface of the perovskite solar cell module, so that the inner-layer substrate can be effectively protected, heat transfer can be effectively blocked by utilizing the heat insulation characteristic of the epoxy resin adhesive protection layer, and the purposes of reducing the overall temperature of the module and relieving the thermal decomposition of perovskite are achieved; therefore, the service life of the perovskite solar cell module is prolonged.

The invention provides a high-heat-resistance copper-clad plate and a preparation process thereof, and belongs to the technical field of copper-clad plates. The preparation process comprises the following steps: pretreating the polyimide film; preparing a mixed glue solution; preparing a prepreg; and hot-pressing and curing. The preparation method comprises the following steps: carrying out a reaction on m-diacetylene benzene, methyl phenyl dichlorosilane and the like used as raw materials to prepare a silicon-containing resin, and carrying out a reaction on isosorbide bis (terephthalate), bisphenol A and dibenzoate used as raw materials under the catalysis of 4-dimethylaminopyridine to prepare a modifier. When the modifier is used for modifying the silicon-containing resin to prepare the modified silicon-containing resin, as the modifier can improve the thermal conductivity of the silicon-containing resin, facilitate uniform distribution of heat and further improve the heat resistance of the silicon-containing resin, after the modified silicon-containing resin is added into a modified glue solution, the heat resistance of the modified glue solution can be effectively improved, and the service life of the modified glue solution is prolonged. Therefore, the effect of improving the heat resistance of the copper-clad plate is achieved.

The invention discloses a biodegradable composite polylactic acid packaging bag and a preparation method thereof, belongs to the technical field of biodegradable materials, and aims to solve the technical problem that the mechanical property, heat resistance and biodegradation rate of a polylactic acid material in the prior art need to be further improved. The material comprises the following components in parts by weight: 90-100 parts of modified polylactic acid, 10-15 parts of modified starch, 15-20 parts of modified nanofiber, 4-8 parts of pigment and 5-7 parts of additive, and is prepared by taking the modified polylactic acid as a basic raw material, the modified starch and the modified nanofiber as reinforcing materials and the pigment and the additive as auxiliary additives. The mechanical strength and high temperature resistance of the packaging bag are effectively improved, and the biodegradability of the packaging bag is improved, so that the packaging bag better meets the requirements of express and logistics industries on biodegradable packaging materials.

The invention belongs to the technical field of thermal insulation materials, and discloses a quartz fiber reinforced phenolic aerogel composite material with a densified surface layer and a preparation method of the quartz fiber reinforced phenolic aerogel composite material. The composite material comprises a densified surface layer and a light inner layer, the densified surface layer takes polycarbosilane modified bismaleimide resin as a matrix and quartz fiber woven cloth as a reinforcement; and the light inner layer takes phenolic aerogel as a matrix and quartz fiber needled felt as a reinforcement body. The preparation method comprises the following steps: connecting the surface layer woven fabric and the inner layer needled felt into a whole through needling, and then sequentially filling the surface layer matrix and the inner layer matrix. The aerogel composite material has the characteristics of ablation resistance, tough surface and heat insulation, the comprehensive density and the comprehensive mechanical property can be regulated and controlled, and the comprehensive requirements of heat insulation, low-speed impact resistance, light weight and certain mechanical strength of a large-area thermal protection structure of the windward side of a hypersonic speed device on the phenolic aerogel composite material can be met.

The invention discloses a high-temperature-resistant adhesive tape for a lithium battery and a preparation method of the high-temperature-resistant adhesive tape, belongs to the technical field of adhesive tape processing, and is used for solving the technical problem that the mechanical strength, high-temperature aging resistance and flame resistance of a high-temperature-resistant adhesive tape for a lithium battery in the prior art need to be further improved. The adhesive tape comprises a base tape layer, an adhesive layer and release paper, wherein one side of the base tape layer is coated with the adhesive layer; the release paper is adhered to the adhesive layer; the base tape layer comprises the following components in parts by weight: 20-30 parts of modified butyl rubber, 30-50 parts of polyisobutene, 7-9 parts of modified siloxane, 3-5 parts of an additive and 35-45 parts of mixed filler; according to the invention, polysiloxane modified nitrile rubber, polyisobutene and modified siloxane are reinforced by a mixed filler composed of modified vermiculite powder and modified calcium carbonate, so that the high-temperature aging resistance of the high-temperature-resistant adhesive tape is effectively improved, and the tensile property and flame resistance grade of the high-temperature-resistant adhesive tape are also improved.

The invention discloses a gradient structure wear-resistant coating and a preparation method thereof. The gradient wear-resistant coating comprises (1) a base coat; (2) preparing a plurality of transition layers, namely NiSi and irregular WC ceramic particle composite coatings; (3) a wear-resistant layer, namely a NiSi and spherical WC ceramic particle composite coating; the gradient coating is prepared on the surface of a metal matrix; irregular WC ceramic particles are added into the NiSi matrix coating to serve as a transition layer to achieve smooth transition between different materials, interface stress is reduced, spherical WC ceramic particles are added into the NiSi matrix coating to serve as a wear-resistant layer, and the wear resistance can be improved while internal stress can be reasonably controlled through the gradient structure coating. Abrasion and other mechanical damage can be effectively resisted, and therefore the service life of parts is prolonged. And the three-layer gradient structure coating improves the wear resistance while reasonably controlling the internal stress.

The invention discloses a preparation method of a silybin meglumine tablet, which comprises the following steps: reacting silybin with meglumine under optimized conditions to generate a liquid reactant, omitting a drying link, and directly adding the liquid reactant into an auxiliary material through spray gun atomization for one-step granulation; the auxiliary materials are screened and premixed, and after liquid reactants and the auxiliary materials are uniformly mixed, the temperature and spraying parameters are controlled to complete particle preparation. And after granulation, drying to a target water content by adopting fluidized bed drying equipment, and carrying out particle mixing, tabletting and coating to finally finish aluminum-plastic subpackaging and outer packaging. The process omits the traditional steps of drying, crushing and granulating, prevents reactants from being exposed to a high-temperature environment for a long time, and effectively improves the utilization rate of raw materials, the content of effective components and the purity of the product. Meanwhile, dust is reduced, the production environment is optimized, and the operation safety and the product yield are remarkably improved.

The invention discloses a VOCs adsorption tower applying a honeycomb type concentration system, and relates to the technical field of waste gas treatment, the VOCs adsorption tower comprises an adsorption tower, a gas inlet, a steam mechanism, a beating mechanism, a second conveying pipe, a one-way valve, a catalytic combustion box, a spraying mechanism, a suction pump, a third conveying pipe, a three-way valve, a connecting pipe, a storage box and a detection mechanism; the left side of the front end of the adsorption tower is fixedly connected with an air inlet, the top of the adsorption tower is fixedly connected with a steam mechanism, and the steam mechanism is arranged, so that cracking and expansion of micro-pore channels in honeycomb-shaped activated carbon are accelerated through steam, the desorption efficiency is improved, and meanwhile, growth of pore walls and formation of pore structures are promoted; the specific surface area and the pore volume of the honeycomb-shaped activated carbon are increased, the adsorption performance of the honeycomb-shaped activated carbon is improved, the steam temperature is reduced through external water, excessive dryness is prevented, the structural integrity of the honeycomb-shaped activated carbon is protected, the heating rod stops working through the first control switch, accidents caused by overheating are prevented, and the safety of operators and equipment is protected.

The invention relates to the technical field of polylactic acid, and discloses a preparation process of high-heat-resistance polylactic acid, which utilizes the advantage of good compatibility between modified cellulose prepared from microcrystalline cellulose and long-chain alkyl olefin and a polylactic acid matrix to prepare a chain segment having both the flexibility of long-chain aliphatic hydrocarbon and the rigidity of cellulose. The polylactic acid is endowed with excellent flexibility; in addition, the modified cellulose can effectively absorb and transfer acting force, and the crystallinity and mechanical property of polylactic acid are improved; the polylactic acid and the alkane modified cellulose are crosslinked through chemical grafting, so that the interaction between molecular chains is enhanced, the interface bonding with the polylactic acid is increased, the compactness of a network structure between the polylactic acid and the cellulose is enhanced, the thermal decomposition of the polylactic acid is delayed, and the tensile property and the heat resistance of the polylactic acid are remarkably improved.

The present invention relates to the technical field of graphene and functional natural rubber composite materials, and in particular to the preparation of a low heat generation, high thermal conductivity and long life solid tire based on high-strength and high-toughness ball-milled thiol-synergistically modified graphene / natural rubber, wherein the graphene is modified by a ball-milled thiol-synergistic modification process, and then a high-strength and high-toughness ball-milled thiol-synergistically modified graphene / natural rubber is prepared by an aqueous phase synergistic coagulation process and a mechanical blending method, thereby obtaining a low heat generation, high thermal conductivity and long life solid tire. By ball-milling modification of graphene oxide slurry, its edge carbon defects are increased, and the free radical content on its surface is increased, while the edge carbon defects can increase the load during subsequent thiol modification, and the surface free radicals can remove the free radicals generated by the molecular chain breakage caused by heat and oxygen attack at the initial stage of tire dynamic driving heat generation, reduce the thermal decomposition of the natural rubber matrix molecular chain, reduce the fatigue compression heat generation value, and thus delay the aging speed of the tire.

The utility model discloses a low-temperature spray drying device, and particularly relates to the technical field of spray drying, the low-temperature spray drying device comprises a low-temperature dryer main body, a flow guide drying assembly is arranged on the low-temperature dryer main body, and the flow guide drying assembly comprises a plurality of limiting plates which are arranged in the low-temperature dryer main body side by side. By arranging the flow guide drying assembly, stock solution is injected into the pump machine through the guide pipe, the pump machine is started to convey the stock solution into the atomizing nozzle and is sprayed out through the atomizing nozzle, liquid substances are atomized into fine particles through the atomizing nozzle, then the fine particles are rapidly dried in a low-temperature environment, and the fine particles pass through the filter screen plates, so that the drying efficiency is improved. And the apertures of the filter screen plates are arranged side by side from large to small, so that the low-temperature dryer main body can reduce thermal decomposition, oxidation and other reactions of heat-sensitive substances, meanwhile, the activity and stability of the substances are kept, in the drying process, the substances are also conveniently classified, and the use convenience of the device is improved.

The invention discloses a mildew-resistant, waterproof and rat-bite-resistant PVC cable and a preparation method thereof, and belongs to the technical field of PVC cables. The PVC cable comprises four groups of wire core layers, the wire core layers are arranged circumferentially, a ground wire layer is arranged in the middle of the wire core layers, a filling layer is arranged outside the wire core layers and the wire core layers, a shielding layer is arranged outside the filling layer, an inner protection layer is arranged outside the shielding layer, an armor layer is arranged outside the inner protection layer, and an outer protection layer is arranged outside the armor layer. An outer protective layer is arranged outside the armor layer, the wire core layer comprises a wire core conductor and a wire core insulating layer arranged outside the wire core conductor, and the ground wire layer comprises a ground wire conductor and a ground wire insulating layer arranged outside the ground wire conductor. According to the present invention, the prepared cable has characteristics of flame retardation, thermal stability, mildew resistance, water resistance and oil stain resistance, the rat biting experiment results show that the prepared cable further has the rat bite prevention function, and further has the rat prevention function after the aging experiment, such that the continuous rat prevention effect is ensured.

The invention relates to the technical field of functional polypropylene fibers, in particular to a polypropylene short fiber for low-foam filtration and a preparation method of the polypropylene short fiber. The polypropylene short fiber for low-foam filtration is obtained by blending and extruding polybutadiene grafted with organic tin alkyl acrylate and polypropylene, and the polybutadiene grafted with the organic tin alkyl acrylate is a hydrolytic carboxyl system. The polypropylene short fiber for low-foam filtration has excellent defoaming performance and thermal stability.

The present invention belongs to the technical field of Chinese patent medicines, and specifically relates to a postpartum rehabilitation granule and a preparation process thereof. The present invention prepares a tartaric acid modified gelatin, and adds it as an auxiliary material in the preparation process of the postpartum rehabilitation granule. The present invention finds that the tartaric acid modified gelatin and the Chinese medicine components are decocted together before the first decoction, and the tartaric acid modified gelatin can effectively improve the retention rate and stability of various components in the process, and finally improve the extraction effect of the medicinal material and the stability of the product.

The invention discloses a preparation method of a modified cardanol aldehyde amine curing agent, and relates to the technical field of epoxy curing agents. According to the invention, bisphenol formed by reaction of cardanol and phenol is mixed with sodium lignin sulfonate intercalated magnesium-aluminum hydrotalcite, and the mixture reacts with polyamine and aldehyde compounds to obtain the modified cardanol aldehyde amine curing agent, so that the high and low temperature resistance, weather resistance and corrosion resistance of the curing agent can be effectively improved; the application range of the cashew phenolic aldehyde amine curing agent in the field of epoxy coatings is favorably expanded.

The invention discloses a VOCs adsorption tower using a honeycomb concentration system, which relates to the technical field of waste gas treatment, and comprises an adsorption tower, an air inlet, a steam mechanism, a flapping mechanism, a second delivery pipe, a one-way valve, a catalytic combustion box, a spraying mechanism, a suction pump, a third delivery pipe, a three-way valve, a connecting pipe, a storage box and a detection mechanism. The air inlet is fixedly connected to the left side of the front end of the adsorption tower, and the steam mechanism is fixedly connected to the top of the adsorption tower. The steam mechanism is arranged to accelerate the cracking and expansion of micro-channels inside the honeycomb activated carbon through steam, thereby improving the desorption efficiency, promoting the growth of the pore wall and the formation of the pore structure, increasing the specific surface area and pore volume of the honeycomb activated carbon, and improving its adsorption performance. Then, the steam temperature is reduced by external water to prevent overdrying and protect the structural integrity of the honeycomb activated carbon. The heating rod is stopped by a first control switch to prevent accidents caused by overheating, thereby protecting the safety of operators and equipment.

The invention relates to the technical field of power cables, in particular to a cross-linked polyethylene insulated flame-retardant power cable and a preparation method thereof, which are used for solving the problems that an existing cable material is extremely easy to damage when facing high temperature and flame, so that a cable insulating layer is exposed, and potential safety hazards exist. According to the insulating layer of the cable, the inner protection layer and the insulating flame-retardant layer are adopted for synergistic effect, the inner protection layer ensures basic electrical insulation and mechanical protection, and the insulating flame-retardant layer serves as an independent functional unit and is filled with a flame retardant, so that the cable has good insulating flame-retardant performance; a multi-layer and active fireproof system is constructed: a multi-layer and synergistic flame-retardant barrier is formed inside the cable by inner and outer modified base materials and a flame retardant in the insulating layer, so that the cable can be quickly self-extinguished during combustion, smoke and molten drops are remarkably inhibited, chemical crosslinking is completed between the inner protective layer and the insulating flame-retardant layer by adopting co-extrusion and synchronous crosslinking processes, an interlayer interface is eliminated, and the flame-retardant performance of the cable is improved; the structural integrity is improved, and the performance is improved.

The invention belongs to the technical field of bean screening, and discloses a bean screening device for bean product processing. Comprising a fixing frame, a defective plate is fixedly connected to the inner wall of the fixing frame, a sieve plate is fixedly connected to the inner wall of the fixing frame, and the sieve plate is arranged at the top end of the defective plate. Through the arrangement of the hot air assembly, hot air can be provided for the feeding box, and the hot air uniformly flows out through the air outlet holes formed in the roller, so that the soybeans can be heated, enzymes in the soybeans can be subjected to thermal denaturation and lose activity after the soybeans are heated, and the quality of the soybeans is improved. Meanwhile, part of aldehydes, other volatile compounds and harmful gases are volatilized or thermally decomposed to be reduced, and the problem that gases such as aldehydes are easily generated after the soybeans are stored is solved.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

The invention relates to a conductive MPPO material based on carbon fibers and a preparation method of the conductive MPPO material, and belongs to the technical field of high polymer materials. The conductive MPPO material based on the carbon fibers comprises the following components in parts by weight: 40-70 parts of PPO resin, 10-30 parts of polystyrene, 5-20 parts of a modified flame retardant, 2-10 parts of a modified flexibilizer, 0.1-5 parts of an antioxidant, 0.5-2 parts of a lubricant and 5-15 parts of the carbon fibers, benzoxazine in the modified flame retardant forms a carbon layer, oxygen and heat are isolated, non-combustible gas is released, combustion is retarded, the high glass transition temperature endows heat resistance, and polydopamine cooperates with phosphorus and nitrogen to interrupt a combustion chain; flexible phenoxy in the modified flexibilizer enhances the toughness, maleimide and silica improve the impact resistance, and a flexible silica chain segment improves the tensile strength; the carbon fiber-based conductive MPPO material prepared by the invention not only has good conductive and impact-resistant effects, but also has excellent heat resistance and flame retardance.

The invention discloses a low-odor PC / ABS alloy and a preparation method thereof, and belongs to the technical field of alloy materials, the alloy material comprises the following components by weight: 65-75 parts of PC resin, 25-35 parts of ABS resin, 2-8 parts of lanthanum modified diatomite, 3-5 parts of a compatilizer, 0.5-2 parts of a POSS-based deodorant, and 0.1-0.5 part of an initiator; the POSS-based deodorant is a polyhedral oligomeric silsesquioxane derivative, the molecular structure of the POSS-based deodorant contains a vinyl group, an epoxy group and a siloxane group at the same time, through the synergistic effect of the POSS-based deodorant and the lanthanum-modified diatomite, a multi-target deodorization system for generation inhibition, chemical capture and physical adsorption is constructed, the mechanical property of the PC / ABS alloy is maintained, and meanwhile the mechanical property of the PC / ABS alloy is improved. Source inhibition and whole-process control of VOC are achieved, the odor grade and the TVOC release amount are greatly reduced, and the long-acting and stable low-odor effect is achieved.

The application discloses a cold-resistant high-voltage cable and a preparation method thereof, and relates to the technical field of polyolefin cables. The cold-resistant high-voltage cable comprises the following steps: step 1, uniformly mixing high-density polyethylene, linear low-density polyethylene, maleic anhydride grafted POE, hydrogenated styrene-butadiene-styrene block copolymer, a crosslinking agent, an antioxidant and a lubricant, and high-temperature stirring to obtain premix; step 2, melt extruding the premix, wherein the melt extrusion process comprises six temperature zones, and high-pressure modified fibers are added in the fourth temperature zone, and then cooling and forming to obtain a cold-resistant high-voltage outer sheath; and step 3, sequentially coating a cable core with the outer sheath, a shielding layer and an insulation layer to obtain the cold-resistant high-voltage cable. The outer sheath of the cold-resistant high-voltage cable prepared in the application has good cold resistance and high-voltage stability, so that cracks of the outer sheath are avoided, and the use of the cable is affected.

The invention discloses a method for improving yellowing of PHA (polyhydroxyalkanoate), which is characterized in that the PHA such as PHB is compounded with an organic peroxide cross-linking agent, an anti-hydrolysis agent and an antioxidant to achieve the effects of inhibiting yellowing and increasing transparency.

The invention relates to an improved synthesis and separation method of dimethyl thio toluenediamine, which comprises the following steps: by taking toluenediamine and dimethyl disulfide as raw materials, cuprous iodide as a catalyst and a phosphorus-containing additive as a protective auxiliary agent, reacting at 130-150 DEG C under normal pressure to synthesize the dimethyl thio toluenediamine, and carrying out extraction separation, alkali neutralization and saturated saline solution washing on the crude product by using dilute phosphoric acid containing phosphorous acid and a hydrochloric acid aqueous solution containing phosphorous acid to finally obtain the dimethyl thio toluenediamine with light color. When the method is used for preparing the dimethyl thio toluenediamine, the color of the diamine can be improved, and the purity of the diamine can be improved.

The invention discloses a micelle, foam containing the micelle, a preparation method and application. The micelle comprises a cationic surface active agent and counter ions, the mass ratio of the cationic surface active agent to the counter ion is (3-6): 1 or 8: 1; the cationic surface active agent comprises alkyl trimethyl ammonium salt; in the alkyl trimethyl ammonium salt, the number of carbon atoms in an alkyl carbon chain is greater than or equal to 20; the counter ions comprise salicylic acid ions; in the micelle, the mass concentration of the cationic surface active agent is 0.1 weight percent to 1.0 weight percent. The micelle system is good in rheological property, simple in process, low in preparation cost and small in environmental pollution. The foam system containing the micelle has good stability and oil displacement efficiency, integration of fracturing and displacement can be achieved, the recovery rate is remarkably increased at the high temperature, the preparation operation steps are simple, and the cost is low.