177results about How to "Less corrosive" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The invention discloses a cleaning method, a cleaning system and application of a precision filter. The cleaning method comprises the following steps: roughly cleaning the emptied precision filter by adopting an organic solvent; washing the roughly washed precision filter with water to elute the organic solvent; after washing, draining washing water in the precision filter to enable the precision filter to be filled with water, and heating to perform deep hydrolysis treatment on gel impurities attached in the precision filter; after the deep hydrolysis treatment is completed, completely discharging decomposition liquid in the precision filter; and washing with water and drying to complete cleaning of the precision filter. According to the cleaning method, deep decomposition treatment is conducted with water to replace an existing alkali washing procedure, efficient decomposition of GPAN can be achieved, the cleaning effect is good, the solid waste generation amount is small, and corrosivity is small. The invention further improves the process of deep decomposition treatment with water, provides a backflow self-circulation deep decomposition treatment process and a forced circulation deep decomposition treatment process, and further improves the cleaning effect.

The invention relates to the field of battery materials, in particular to a halogen-free electrolyte for a magnesium metal battery and a preparation method of the halogen-free electrolyte. The magnesium salt comprises at least one of bis (trifluoromethanesulfonyl) imide magnesium and magnesium trifluoromethanesulfonate; the additive is prepared from at least one of indole, 3-azaindole, 4-azaindole, 5-azaindole, 6-azaindole, 4-amino indole, 5-amino indole, 6-amino indole and 7-amino indole; the organic solvent comprises ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1, 3-dioxolame or 1, 3-dioxane. The preparation method comprises the following steps: sequentially adding the magnesium salt and the additive into the organic solvent, and stirring and reacting at room temperature for 1 min to 24 h to obtain the halogen-free electrolyte for the magnesium metal battery. And the prepared electrolyte has excellent performances of small overpotential, long service life and wide electrochemical window, and has a good commercial application prospect.

The invention relates to a low-cost composite metal catalyst which is a CuO / ZnO / Al2O3 composite metal catalyst, and the molar ratio of CuO to ZnO to Al2O3 is (6-4): (3-4): (0.5-1). The composite catalyst is prepared by the following steps: adding carbonate into a mixed salt aqueous solution of copper salt, zinc salt and aluminum salt for co-precipitation, grinding a filter cake, and roasting at high temperature. According to the catalyst, 1, 12-dodecanedioic acid dimethyl ester which is low in price and easy to obtain can serve as a raw material, 1, 12-dodecanediol is prepared through catalytic hydrogenation under the milder condition compared with the prior art, high yield and low cost are achieved on the premise that the process condition control difficulty is greatly reduced and the process safety is improved, and the problems that in the prior art, 1, 12-dodecanedioic acid dimethyl ester is synthesized, and the cost is low are solved. The technical problems of high energy consumption, expensive catalyst, harsh reaction conditions and difficult realization of industrial production in the reaction process of 1, 12-dodecanediol in the prior art are solved.

The invention discloses a comprehensive utilization method of high-salinity wastewater produced by hydrometallurgical treatment of bastnaesite, which comprises the following steps: A, mixing alkaline wastewater and acidic wastewater, neutralizing and clarifying to obtain calcium fluoride and sodium chloride wastewater; b, mixing the sodium chloride wastewater with the precipitation wastewater, adding lime water in an aeration manner to adjust the pH value, hydrolyzing heavy metal ions in the wastewater, and performing solid-liquid separation to obtain filter residues and filtrate which is sodium chloride high-salinity wastewater; and C, adding oxalic acid into the sodium chloride high-salinity wastewater, stirring, standing, carrying out solid-liquid separation, pressurizing, concentrating, recovering hydrochloric acid, and crystallizing to obtain a crystal substance, namely a sodium chloride product. According to the method, fluorine in the wastewater is removed firstly, then the wastewater is recovered into wastewater containing sodium chloride, oxalate is dissolved into the high-salinity wastewater to separate out sodium oxalate and recover hydrochloric acid, so that the content of sodium chloride in the system is greatly reduced, and the recovery efficiency of sodium ions in the wastewater is improved.

The invention relates to the technical field of waste battery recovery and regeneration, in particular to a deep eutectic solvent, a waste battery negative electrode graphite recovery and regeneration method and a regenerated graphite material. The deep eutectic solvent is composed of a hydrogen bond acceptor and a hydrogen bond donor, the hydrogen bond acceptor is choline chloride, and the hydrogen bond donor is phytic acid. The method comprises the following steps: pretreating the waste lithium battery to obtain a waste graphite material; leaching the waste graphite material by using a deep eutectic solvent, and then washing and drying to obtain regenerated graphite; the deep eutectic solvent is a combination of choline chloride and phytic acid. The method provided by the invention has the advantages of low toxicity of raw materials, low corrosivity and environmental friendliness; metal in the waste graphite is effectively removed, phosphorus is doped, and the lithium storage performance of the graphite is improved while the graphite is repaired; the regeneration temperature is low, and a low-energy-consumption and low-acidity scheme is provided in the aspects of treatment and regeneration of the waste graphite.

The invention discloses a preparation method of tert-butyl alcohol, and relates to the technical field of chemical raw materials. The method comprises the following steps: pretreatment of a catalyst: activating the solid acid catalyst to remove possible impurities and moisture so as to improve the activity and selectivity of the catalyst; hydration reaction: adding the pretreated catalyst into a reaction tower, introducing isobutene gas and water, stirring, and carrying out hydration reaction under the action of the catalyst; and separation and purification: the reacted mixture enters a separator, tert-butyl alcohol and the raw material are separated out, the unreacted raw material isobutene is circulated back to the reaction kettle to continue to participate in the reaction, the separated crude tert-butyl alcohol product enters a rectifying tower to be rectified and purified, and the tert-butyl alcohol product is obtained. Compared with a traditional liquid acid catalyst, the solid acid catalyst has the advantages of being easy to separate, capable of being repeatedly used, small in corrosion to equipment and the like.

The invention relates to the technical field of copper plate strip rolling liquid, and provides environment-friendly copper plate strip rolling liquid which comprises the following components in percentage by mass: 40%-50% of base oil, 12%-18% of an additive, 5%-10% of triethanolamine, 0.05%-0.15% of graphene and the balance of water, the additives comprise a lubricant, an antioxidant, a corrosion inhibitor, an emulsifier and a bactericide, wherein the lubricant accounts for 2%-5%, the antioxidant accounts for 1%-2%, the corrosion inhibitor accounts for 0.5%-1.5%, the emulsifier accounts for 5%-10%, and the bactericide accounts for 2%-5%; the base oil comprises synthetic oil, vegetable oil and mineral oil, and the synthetic oil accounts for 20%-50%, the vegetable oil accounts for 15%-45% and the mineral oil accounts for 30%-60%. The rolling force and equipment energy consumption can be effectively reduced, the rolling speed stability is improved, the surface quality, hardness and thickness uniformity of the copper plate strip are remarkably improved, corrosion to equipment is lower, and the production quality and efficiency of the copper plate strip can be improved.

The utility model discloses a municipal engineering tubular steam generator, and relates to the technical field of steam generators. The tubular steam generator comprises a tubular steam generator body, a water inlet pipe is fixedly connected to the top of the tubular steam generator body, a steam pipe is fixedly connected to the top of the tubular steam generator body, and a heating pipe is fixedly connected to the bottom of the tubular steam generator body. The top of the tubular steam generator body is fixedly connected with a motor, and an output shaft of the motor is fixedly connected with a reciprocating lead screw. Through cooperation of the spring, the protruding block, the abutting block, the L-shaped knocking block and the arc-shaped scraping ring, resetting of the spring can drive the fixing block, the L-shaped knocking block and the abutting block to reset, so that the L-shaped knocking block knocks the arc-shaped scraping ring, dirt, including hard and stubborn dirt, attached to the inner wall of the tubular steam generator body is more effectively scraped away, and the service life of the tubular steam generator is prolonged. And the operation efficiency of the equipment is ensured.

The invention belongs to the technical field of olefin hydroesterification reaction and catalysts thereof, and particularly relates to a B-L double-acid ionic liquid and a preparation method thereof, and a method for preparing carboxylic ester by adopting the B-L double-acid ionic liquid as an auxiliary agent and a solvent at the same time. The preparation method of the B-L double-acid type ionic liquid comprises the following steps: mixing a zwitterionic precursor A and a zwitterionic precursor B, and after the reaction is completed, carrying out suction filtration, washing and drying to obtain zwitterionic solid powder; dissolving the zwitterionic solid powder in methanol, dropwise adding acid, and reacting to obtain a B acid type ionic liquid; dropwise adding L acid into the B acid type ionic liquid, stirring for reaction, washing and drying to obtain the B-L double-acid type ionic liquid. The B-L double-acid type ionic liquid provided by the invention is also used as an auxiliary agent and a solvent in the preparation of organic carboxylic ester, the dosage is small, the corrosion to equipment is small, the product is easy to separate, and the B-L double-acid type ionic liquid can be reused and has good catalytic activity.

The invention provides a solar cell, a preparation method thereof and a photovoltaic module. The solar cell includes: a substrate; the first tunneling oxide layer is located on the surface of one side of the substrate; the first phosphorus doped layer is located on the surface of one side, far away from the substrate, of the first tunneling oxide layer; the second tunneling oxide layer is located on the surface of the side, away from the first tunneling oxide layer, of the first phosphorus-doped layer; the second phosphorus-doped layer is located on the surface of one side, far away from the first phosphorus-doped layer, of the second tunneling oxide layer; the third tunneling oxide layer is located on the surface of the side, away from the second tunneling oxide layer, of the second phosphorus-doped layer. The third phosphorus-doped layer is located on the surface of one side, far away from the second phosphorus-doped layer, of the third tunneling oxide layer; wherein the doping concentration of phosphorus in the first phosphorus-doped layer is smaller than the doping concentration of phosphorus in the second phosphorus-doped layer, and the doping concentration of phosphorus in the second phosphorus-doped layer is smaller than the doping concentration of phosphorus in the third phosphorus-doped layer. The solar cell has a good passivation effect.

The invention relates to the field of surface treatment of high-pressure heater heat exchange equipment, and discloses a descaling cleaning agent and application thereof. Based on the total weight of the descaling cleaning agent, the descaling cleaning agent is prepared from the following components in percentage by weight: 5 to 40 percent of oxalic acid, 0.5 to 10 percent of tartaric acid, 0.5 to 10 percent of malic acid, 0.05 to 5 percent of a surfactant, 0.05 to 5 percent of a complexing agent, 0.05 to 5 percent of a corrosion inhibitor, 0.1 to 5 percent of an additive and 40 to 93 percent of water, the surfactant is a combination of a nonionic surfactant and an anionic surfactant. The descaling cleaning agent disclosed by the invention takes the organic weak acid as a main body, is matched with the surfactant, the complexing agent and other auxiliaries, has the characteristics of high descaling efficiency, high speed, low corrosivity, no damage to a cleaning surface, low cost and the like, can be applied to surface treatment of high-pressure heater heat exchange equipment, and is particularly suitable for cleaning a scale sample in a U-shaped heat exchange tube of a high-pressure heater.

The invention belongs to the technical field of lead-free solder paste preparation, and discloses a lead-free composite solder paste with a high spreading rate and a preparation method. The lead-free composite soldering paste comprises soldering powder and soldering flux. The soldering flux is prepared from modified rosin, an activating agent, a surface active agent, a thixotropic agent, thermosetting resin, an antioxidant, a corrosion inhibitor and an organic solvent. The activating agent comprises hydroxy acrylic resin, terephthalic acid and ethylene bis stearamide. The prepared lead-free composite soldering paste is good in wettability, good in printability, low in corrosivity and less in residue, can effectively inhibit the occurrence of undesirable welding phenomena such as tin beads, dewetting and collapse, greatly reduces the reject ratio of printing, and improves the reliability of welding; the preparation method of the lead-free composite soldering paste is simple and easy to operate, raw materials are easy to obtain, and the lead-free composite soldering paste is suitable for industrial popularization.

The invention belongs to the technical field of chemical engineering, and particularly relates to a method for preparing 5-hydroxymethylfurfural by degrading cellulose in a FePO4 / SBA-15-SO3H catalytic system, which comprises the following steps: SBA-15 preparation; the preparation method comprises the following steps: preparing a FePO4 / SBA-15-SO3H catalyst; and step 3, preparing the 5-hydroxymethylfurfural in a FePO4 / SBA-15-SO3H catalytic system. According to the method, FePO4 / SBA-15-SO3H is adopted as a catalyst system, cheap cellulose is used as a raw material to prepare the 5-hydroxymethylfurfural with a high additional value, the method has the advantages of low price and easiness in recovery, the corrosion to equipment is small, the pollution to the environment is reduced, the selectivity for generating the 5-hydroxymethylfurfural is higher, and the method is suitable for industrial production. And the yield of the 5-hydroxymethylfurfural is improved.

The invention discloses a catalyst for preparing 5-hydroxymethylfurfural through sugar conversion and a preparation method and application thereof.The preparation process of the catalyst comprises the steps that hydrochloric acid or metal chloride is prepared into an aqueous solution with the concentration being 10-25 wt%, nitrogen-containing organic matter is added, the mixture is stirred for 0.5-3 h at the temperature of 20-50 DEG C, the organic matter and water are evaporated through reduced pressure distillation, and the catalyst is obtained; according to the present invention, the residual crystalline solid is collected so as to obtain the catalyst, the catalyst is used for preparing 5-hydroxymethylfurfural through sugar conversion, and compared with other homogeneous catalysts, the developed catalyst has advantages of low equipment corrosion, high reaction activity and high HMF selectivity.

The invention relates to an environment-friendly process method for improving the surface metal cleaning efficiency of a silicon wafer, and belongs to the technical field of semiconductor silicon wafer processing, and the process method comprises the following operation steps: S1, pre-cleaning and activation: placing the silicon wafer in a first cleaning tank, introducing ozone into ultrapure water, and processing in cooperation with low-frequency ultrasound; and S2, main cleaning and complexing: placing the silicon wafer subjected to pre-cleaning and activating treatment in a second cleaning tank, and treating the silicon wafer in a dilute citric acid solution in cooperation with high-frequency ultrasound. And S3, overflow rinsing: placing the silicon wafer subjected to main cleaning and complexing treatment in a third cleaning tank. And S4, drying: carrying out drying treatment on the silicon wafer subjected to the overflow rinsing treatment. Through the synergistic effect of physical stripping, chemical oxidation and complexing dissolution, under the condition that highly toxic chemicals such as hydrofluoric acid are not used, the cleanliness of metal on the surface of the silicon wafer reaches the ppt level, and the problems that traditional RCA cleaning is serious in environmental pollution and high in operation risk are effectively solved.

The invention belongs to the technical field of photoresist, and particularly relates to photoresist stripping liquid as well as a preparation method and application thereof. The photoresist stripping liquid contains a first amine compound, a second amine compound and an organic solvent I, wherein the first amine compound has a structure as shown in a formula (1) or a formula (2); the second amine compound has a structure as shown in a formula (3). The key point of the invention lies in that the specific first amine compound and second amine compound are adopted as key components of the photoresist stripping liquid, and the obtained photoresist stripping liquid has strong photoresist removal capability and effect, can achieve basically no residue on a base material, and has the advantages of short treatment time, high efficiency, small corrosion to the base material, and low cost. And the substrate at the lower layer is hardly damaged. # imgabs0 #

The invention discloses a method for preparing phenyl acetate with high selectivity. A phosphoric acid solution is added into a magnesium chloride solution, stirring and heating are performed to obtain a suspension, the suspension is dried to constant weight to obtain a white solid, the white solid is ground to obtain powder, and the powder is calcined to obtain the catalyst. Then mixing phenol and a catalyst, placing the mixture in an oil bath for reflux reaction, dropwise adding acetic anhydride, distilling after the reaction is finished, and collecting a fraction at 190-195 DEG C, namely phenyl acetate. According to the magnesium chloride loaded phosphoric acid type catalyst (MgCl2-H3PO4) prepared by the method disclosed by the invention, phenol and acetic anhydride react without a solvent, MgCl2-H3PO4 is a solid catalyst, can be recycled only by filtering and can be repeatedly used after being washed, and MgCl2-H3PO4 also improves the selectivity of phenyl acetate and reduces the production cost.

The invention relates to a preparation method of phenethyl trialkoxysilane, and belongs to the technical field of synthesis of fine chemicals. The method comprises the following steps: adding styrene and a catalyst into a reaction kettle; dropwise adding trialkoxysilane into the reaction kettle, wherein the molar ratio of styrene to trialkoxysilane is (1.8-1.0): 1.0; and rectifying the reaction material to obtain a target product. The phenethyl trialkoxysilane with the purity larger than 98% and the mass yield higher than 85% (with the mol feeding amount of trialkoxysilane as the standard) is generated through the reaction of styrene and trialkoxysilane under the solvent-free condition, and compared with a large amount of hydrogen chloride as a byproduct in the prior art, the phenethyl trialkoxysilane synthesis method is environmentally friendly, small in corrosion to equipment and low in production cost. The method can prolong the service life of equipment, does not need to use a solvent, further reduces the production cost, has fewer byproducts, does not generate waste materials, is high in raw material conversion rate, and can be used for industrial production.

The embodiment of the utility model provides a battery pack protection plate, a battery pack assembly and electric equipment. The battery pack protection plate comprises a protection plate body and a sealing piece, the guard plate body is a titanium alloy guard plate; the sealing piece is connected to one side, close to the battery pack, of the protection plate body so as to seal the part between the protection plate body and the battery pack. The structural strength and the corrosion resistance of the protection plate body are improved by adopting the titanium alloy protection plate, so that the protection plate body has the excellent performance of resisting strong acid and strong alkali, and the risk that the protection plate body is corroded by external gas and liquid is reduced. The connection position of the protection plate body and the battery pack is sealed through the sealing ring piece, so that the sealing ring can realize effective water prevention on the battery pack protection plate, and external gas or liquid is prevented from easily permeating into the battery pack from the connection position of the protection plate body and the battery pack; the risk that liquid is easily retained on one side, close to the battery pack, of the battery pack protection plate is reduced, and the sealing performance and the corrosion resistance of the battery pack protection plate are improved.

The invention relates to the technical field of fish meat freezing and fresh-keeping, in particular to refrigerating fluid capable of remarkably improving the fish meat freezing quality. The refrigerating fluid is prepared from the following components in percentage by mass: 10 to 15 percent of ethanol, 1 to 3 percent of chitosan, 1.0 to 2.5 percent of rhizoma polygoni cuspidati extract, 0.05 to 0.15 percent of spearmint extract, 2 to 5 percent of malic acid and the balance of deionized water. The freezing method is dipping freezing, the fish meat is dipped in a pre-cooled freezing liquid and then is subjected to cryopreservation, and the freezing temperature is-18 DEG C to-38 DEG C. The preparation method of the refrigerating fluid comprises the following steps: adding the chitosan into the malic acid and the deionized water, and uniformly stirring to obtain a solution A; sequentially adding ethanol and spearmint extract into the solution A, and stirring; and adding the polygonum cuspidatum extract, stirring and homogenizing. According to the freezing liquid, the freezing rate of fish meat can be remarkably increased, mechanical damage to muscle fibers caused by repeated formation of ice crystals is greatly reduced, the influence of temperature fluctuation on the quality of the fish meat is reduced, and the influence of freezing on the quality of the fish meat is reduced to the maximum extent.

The invention discloses a method for improving the yield of hydration reaction of myrcene or dihydromyrcene and a synthetic fragrance, belonging to the technical field of deep processing of forest chemical products. The method comprises steps of synthesis reaction, catalyst recovery, solvent recovery, product neutralization, product fractionation, etc. The invention adopts a composite catalyst composed of one or more of zirconium sulfate, titanium sulfate, α-hydroxy acid and divalent copper salt to catalyze the hydration reaction of myrcene or dihydromyrcene, thereby improving the yield of hydration products and reducing side reactions and energy consumption.

The invention relates to the technical field of disinfectants, in particular to a high-stability composite peracetic acid disinfectant and a preparation process thereof, and the high-stability composite peracetic acid disinfectant comprises the following components in percentage by mass: 4-6% of peracetic acid, 10-15% of hydrogen peroxide, 15.0-25% of acetic acid, 0.1-0.3% of terpolymer and the balance of water. The stability of PAA and HO is improved, and the decomposition of PAA and HO in the storage process is reduced, so that the durability of the sterilization efficiency of the disinfectant is ensured.

The invention provides a method for rapidly extracting light-color phenolated lignin, and belongs to the field of biomass refining. The method comprises the following steps: uniformly mixing a lignocellulose raw material with a mixed solution of aromatic sulfonic acid and a phenolic compound according to a certain solid-to-liquid ratio, and carrying out ultrasonic treatment at a certain temperature; and after the treatment is completed, carrying out solid-liquid separation, pouring the obtained extracting solution into water to precipitate lignin, and washing and drying to obtain the light-color phenolated lignin. The method disclosed by the invention is simple in process, low in time consumption and high in yield, and the solvent is easy to recycle; the prepared lignin is extremely light in color and high in phenolic hydroxyl group content, retains most of aryl ether bonds, can adjust the content of phenolic hydroxyl groups and methoxyl groups in the lignin to a certain extent, and solves the problems of dark color, few functional groups and low reaction activity of the existing industrial lignin. The method can be used for producing lignin-based functional products without further color reduction and activation treatment.

This invention discloses a cleaning method, cleaning system, and application for precision filters. The cleaning method includes the following steps: coarsely washing the emptied precision filter with an organic solvent; washing the coarsely washed precision filter with water to remove the organic solvent; after washing, draining the wash water from the precision filter to fill it with water, then heating to perform deep hydrolysis treatment on the gel impurities adhering to the precision filter; after the deep hydrolysis treatment is completed, draining the decomposition liquid from the precision filter; washing with water, and drying to complete the cleaning of the precision filter. This invention's cleaning method uses water for deep decomposition treatment to replace the existing alkaline washing process, achieving efficient decomposition of GPAN, with good cleaning effect, low solid waste generation, and low corrosivity. This invention further improves the water-based deep decomposition treatment process, proposing a reflux self-circulation deep decomposition treatment process and a forced circulation deep decomposition treatment process to further improve the cleaning effect.

The application discloses a preparation method of aluminum dialkyl hypophosphite with different alkyl groups, and comprises the following steps: (1) dispersing aluminum hypophosphite solid in a low concentration in a solvent system containing alkali metal hydroxide and water, the mass ratio of the aluminum hypophosphite solid to water being 1:20-1000; under the initiation of a free radical initiator, making olefin 1 and the aluminum hypophosphite solid to have an addition reaction at 100-150 DEG C and 0.1-0.3 MPa, and controlling the consumption of the olefin 1 to be sufficient for the reaction of the aluminum hypophosphite solid, so as to prepare an aluminum monoalkyl hypophosphite solution, filtering the precipitate, and collecting the filtrate; (2) continuously feeding olefin 2 different from the olefin 1 into the filtrate, and making the aluminum monoalkyl hypophosphite and the olefin 2 to have an addition reaction under the initiation of the free radical initiator at 100-150 DEG C and 0.1-0.3 MPa, so as to obtain aluminum dialkyl hypophosphite with different alkyl groups. The purity of the aluminum dialkyl hypophosphite with different alkyl groups prepared by the application is above 99.5%.

The invention belongs to the technical field of polyether preparation, and discloses a heterogeneous solid catalyst and a method for preparing styrylphenol polyoxyethylene ether by using the heterogeneous solid catalyst. The preparation method comprises the following steps: dispersing a nano inorganic solid material serving as a pore-making hard template into high-molecular resin, and dissolving in acid liquor to remove the nano inorganic solid material, so as to obtain porous polymer microspheres; and swelling and dispersing the perfluorosulfonic acid polymer, and impregnating the porous polymer microspheres to obtain the heterogeneous solid catalyst. The heterogeneous solid catalyst provided by the invention has the advantages of strong acidity, large specific surface area and excellent catalytic performance, is beneficial to the generation of stilbene phenol, and reduces the residue of free phenol, so that the prepared styryl phenol polyoxyethylene ether has high purity and less foam. The heterogeneous solid catalyst provided by the invention is small in corrosion to equipment, high in reusability and beneficial to being directly applied to actual production.

The invention relates to the technical field of nuclear facility radioactive chemical decontamination, in particular to a pressurized water reactor nuclear power station component detergent, a preparation method and a decontamination device.The pressurized water reactor nuclear power station component detergent comprises a rationing assembly, an ultrasonic motor and a frame arranged at the bottom end of the ultrasonic motor, and a water pump is installed at the top end of the frame; the side wall of the water pump is provided with a distribution tank used for containing ingredient raw materials, and the bottom end of the distribution tank is provided with a conveying pipe; the decontamination assembly comprises a water tank arranged at the top end of the frame, a decontamination piece used for containing a decontamination agent is installed at the top end of the water tank, the stirring box can be sealed by moving one half of a protruding plate upwards, at the moment, a cleaning piece is started to clean a workpiece, the workpiece is cleaned up and down at the same time, the cleaning efficiency of the workpiece can be effectively improved, and the cleaning efficiency of the workpiece is improved. The detergent is simple in component, easy to prepare, low in toxicity or non-toxic, and good in compounding performance of the components, and the raw materials are easy to obtain.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

The invention discloses a low-corrosion ternary nitric acid molten salt heat storage material and a preparation method and application thereof.The method comprises the steps that sodium nitrate powder, potassium nitrate powder and sodium nitrite powder are weighed according to the ratio of K < + > to Na < + > being 1: 1.0-1: 1.5 and the ratio of NO3 <-> to NO2 <-> being 1: 1-1.5: 1 and mixed to obtain a ternary nitric acid molten salt mixture, a silicate additive is added, the mixture is evenly mixed and dried, and a ternary nitric acid molten salt phase preform is obtained; and after fully melting and stirring, cooling and crushing to obtain the low-corrosion ternary nitric acid molten salt. The prepared low-corrosion ternary nitric acid molten salt is small in corrosion, low in melting point, high in decomposition temperature and good in heat stability, and can be used as a heat storage material for solar thermal power generation and other related heat storage fields.