884 results about "Tartaric acid" patented technology

A forest fire retardant composition contains a retardant compound that includes a potassium salt. The potassium salt may include a potassium salt of an organic acid, a potassium salt of an inorganic acid, or mixtures thereof. The organic acid may include formic acid, acetic acid, propanoic acid, butanoic acid, lactic acid, oxalic acid, malic acid, gluconic acid, tartaric acid, uric acid, malic acid, or citric acid. The inorganic acid may include sulfuric acid, phosphoric acid, carbonic acid, or hydrochloric acid. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention discloses a pharmaceutical composition containing melogabalin besylate with good stability and a preparation method of the pharmaceutical composition. The pharmaceutical composition comprises an active component melogabalin besylate, one or more excipients, an adsorbent, a lubricant, a coating agent and an antioxidant, the antioxidant is a combination of L-ascorbyl palmitate and tartaric acid. The invention also provides a preparation method of the melogabalin besylate tablet, and the stability of the melogabalin besylate tablet prepared by the method is obviously improved.

The invention relates to the technical field of fertilizers, and discloses a coating material, a preparation method and application of the coating material in a trace element coating for potassium chloride particles. The preparation method comprises the following steps: reacting isophorone diisocyanate with polycaprolactone diol, tartaric acid and dimethylglyoxime to prepare a polyurethane prepolymer, continuously reacting the polyurethane prepolymer with chitosan oligosaccharide Schiff base to obtain chitosan oligosaccharide modified polyurethane, and mixing the chitosan oligosaccharide modified polyurethane, a cross-linking agent, silane modified isocyanate and a trace element solution to obtain the coating material. The coating material is good in mechanical property, contains trace elements, has a controlled release effect on the potassium chloride granulated fertilizer, and can be applied to the potassium chloride granulated fertilizer as a trace element coating.

The preparation method comprises the following steps: S1, crushing cordate houttuynia rhizomes, adding the crushed cordate houttuynia rhizomes into a mixed acid aqueous solution, and carrying out immersion treatment to obtain a cordate houttuynia mixed solution; s2, adjusting the pH value of the herba houttuyniae mixed solution to 4-5, adding pectinase, carrying out primary enzymolysis and enzyme deactivation, adjusting the pH value to 6-7, adding compound enzyme, carrying out secondary enzymolysis and enzyme deactivation, so as to obtain an enzymatic hydrolysate; s3, menthol is added into the enzymatic hydrolysate, water extraction is conducted, and water extract and filter residues are obtained; s4, the filter residues are added into ethyl alcohol, then salicylic acid and diacetyl tartaric acid ester of mono (di) glycerides are added, alcohol extraction and filtering are conducted, and an alcohol extraction solution is obtained; s5, mixing the water extract with the alcohol extract, and performing reduced pressure distillation to obtain the herba houttuyniae extract. According to the method, the extraction rate of polysaccharide and flavone in houttuynia cordata can be effectively increased, and meanwhile, the prepared houttuynia cordata extract has better oxidation resistance and has a good application prospect.

The invention discloses an environment-friendly electrolyte for anodic oxidation of titanium and titanium alloy workpieces and an electrolytic coloring method. The electrolyte comprises 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water. The electrolytic coloring method comprises the steps of pretreatment, anodic oxidation coloring and aftertreatment. The pretreatment comprises alkali washing oil removal, water washing and laser treatment; and an electrolyte mixed by 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water is used for anodic oxidation coloring. The post-treatment comprises sealing treatment and drying. According to the technical scheme, the technical problems that the anodic oxidation coloring technology is completely free of fluorine, low in toxicity and safe to operate, and the oxidation waste liquid is free of pollution and easy to treat can be solved, existing pretreatment steps can be simplified, and meanwhile uniform coloring is achieved.

The production device comprises a base, a reaction barrel is fixedly arranged on the base, a mounting frame is fixedly arranged on the outer side of the reaction barrel, a motor is fixedly connected to the top end of the mounting frame, and a stirring device for stirring basic zirconium sulfate and tartaric acid is arranged in the reaction barrel. The feeding parts are sequentially added into the reaction barrel, and a discharging part for discharging reacted liquid is arranged in the reaction barrel; through the staggered and periodic coincidence design of discharging grooves of the inner barrel and the outer barrel in the feeding part, the rotating rod is matched to drive the outer barrel to spirally move downwards, accurate and quantitative adding of the basic zirconium sulfate solution is achieved, meanwhile, the adding time and flow of the tartaric acid solution are automatically controlled through magnetic ring adsorption of the upper barrel and the outer barrel and stored energy release of the first spring, and the feeding efficiency is improved. Manual intervention is reduced, efficiency loss caused by step-by-step feeding is avoided, and the preparation efficiency of the water repellent agent is remarkably improved.

The invention provides milky tea base milk and a preparation method thereof and fruity milky tea, the milky tea base milk comprises, by weight, 30-80 parts of a cow milk raw material, 0.1-3 parts of an emulsifier, 0.01-3 parts of a stabilizer, 0.2-3 parts of buffer salt and the balance of water, the cow milk raw material comprises raw cow milk or a mixed emulsion of raw cow milk and grease, and the emulsifier is an emulsifier. The emulsifier is selected from one or more of sodium stearoyl lactylate, diacetyl tartaric acid ester of mono (di) glycerides, fatty acid ester of mono (di) glycerides, polyoxyethylene (20) sorbitan monostearate and polyglycerol fatty acid ester, and the emulsifier further comprises sodium caseinate. The milk tea base milk starts from a milk product, free matching of the milk product and different acidic fruits is realized by constructing a stable system of the acidic milk beverage, the problem of flocculation and denaturation caused by matching of neutral milk and different acidic fruits is practically solved, and the obtained fruit tea is mellow in taste and has good flavor and quality, and the product is easy in raw material obtaining and low in cost. The process is simple and convenient and has the advantage of large-scale production.

The invention provides high-performance silver powder suitable for TOPCon battery fine grid silver paste, a preparation method of the high-performance silver powder and the silver paste, and belongs to the technical field of photovoltaic materials. The preparation method comprises the steps that a silver salt solution and a composite reducing agent are mixed, a first-stage hydrothermal reaction is carried out at the first temperature, a second-stage hydrothermal reaction is carried out at the second temperature, and silver powder is obtained after centrifugation, washing and drying; wherein the composite reducing agent is selected from a mixture of two of potassium tartrate, sodium sulfite and ferrous sulfate. According to the method, gradual growth and crystallinity improvement of silver crystal nucleuses are achieved through two-stage heating, particle aggregation or uneven morphology caused by rapid reduction is avoided, in addition, the adopted composite reducing agent combination is remarkably superior to a single reducing agent (such as ascorbic acid), and the morphology and particle size distribution of the silver powder can be more accurately regulated and controlled.

The invention discloses an acne-removing essence and a preparation method thereof, and particularly relates to the technical field of skin care products, the acne-removing essence comprises the following components by mass: 0.5-5% of salicylic acid; 1%-5% of tartaric acid; 2%-6% of nicotinamide; 0.5%-2% of colloidal sulfur; 1.5%-3% of tea tree essential oil; 1%-2% of hyaluronic acid; 0.5%-1% of ceramide; 1%-3% of glycerol; 1%-2% of trehalose; the salicylic acid is used for penetrating into skin, helping to relieve dead skin cells, reducing inflammation and accelerating skin renewal; the tartaric acid is used for realizing a stripping effect, can remove aged cuticles on the surface of the skin and promote the generation of new cells, so that the problem of acnes is helped to be improved. The acne-removing essence prepared by the invention has a relatively good moisturizing effect, so that skin barrier can be well maintained, keratin metabolism is promoted, grease secretion is inhibited, acne is effectively prevented, inflammatory response of the acne is relieved, and the actual use effect of the acne-removing essence is relatively good.

The invention discloses melogabalin besylate tablets and a preparation method thereof, a tablet core comprises melogabalin besylate, a filler, a disintegrating agent, a lubricant, a flow aid and a stabilizer, the disintegrating agent is sodium carboxymethyl starch, and the stabilizer is tocopherol and tartaric acid; on the basis of selecting sodium carboxymethyl starch as a disintegrating agent, the melogabalin besylate tablet of which the stability (especially the quality control of impurities I) is superior to that of a reference preparation is prepared by investigating the variety and the dosage of a stabilizing agent and selecting a specific stabilizing agent combination; the technical prejudice that the stability of calcium carboxymethyl cellulose is superior to that of sodium carboxymethyl starch in the prior art is overcome.

The invention relates to a super-absorbent paper diaper and a preparation method and application thereof.The super-absorbent paper diaper comprises a bottom film, a core layer, a surface layer and elastic side seals and is characterized in that the core layer is prepared from, by weight, 50-60 parts of acrylic water-absorbent resin, 20-30 parts of polyacrylamide microspheres, 20-30 parts of quaternized chitosan, 10-15 parts of modifier and 1-5 parts of catalyst; wherein the modifier is a composition of tartaric acid, 2-acrylamide-2-methylpropanesulfonic acid and N, N '-bis (acryloyl) cystamine in a mass ratio of 1: (2-3): (1-1.5). Wherein the acrylic water-absorbent resin provides basic water-absorbent capacity, the polyacrylamide microspheres enhance adsorption and prevent gel blockage, the quaternized chitosan improves antibacterial property and electrolyte adsorption capacity, the catalyst ensures that the reaction is fully carried out, and all the components of the modifier cooperate with one another to enhance hydrophilicity; the water absorption performance, the structural stability and the salt tolerance of the core layer are jointly improved.

The invention relates to the field of metal powder material preparation, in particular to silver-coated copper powder with low-temperature sintering activity and a preparation method and application thereof.The preparation method comprises the following steps that copper powder, a reducing agent, a complexing agent composition and a silver plating solution are mixed and react, and the silver-coated copper powder is obtained; the complexing agent composition comprises at least two of ammonia water, triethylene tetramine, ethylenediamine, diethanol amine, benzimidazole, tartaric acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, disodium ethylene diamine tetraacetate, tetrasodium ethylene diamine tetraacetate and glycine. The preparation method disclosed by the invention is short in process flow, relatively low in cost, capable of keeping good batch stability and easy for industrial production; according to the obtained silver-coated copper powder, under the condition that the silver content is low, the completeness and compactness of a silver layer on the surface of the copper powder are good, the oxidation resistance is high, the service reliability of the silver-coated copper powder is improved, the production cost is saved, and the silver-coated copper powder further has good low-temperature sintering activity.

The invention discloses a collateral-dredging and pain-relieving gel plaster and a preparation method thereof. The collateral dredging and pain relieving ointment is prepared from the following raw materials in percentage by mass: camphor, borneol, menthol, absolute ethyl alcohol, collateral dredging and pain relieving volatile oil, a surfactant, collateral dredging and pain relieving extract, tartaric acid, purified water, partially neutralized sodium polyacrylate, a cross-linking agent, an adhesive, glycerol, EDTA-2Na (Ethylene Diamine Tetraacetic Acid) and a filling agent. The plaster disclosed by the invention is high in application comfort, breathable, free from aching feeling after being uncovered, free from residue on skin and not sticky when being in contact with sweat; the use of an organic solvent is basically avoided in the production process; the matrix contains components such as water and glycerol, has the effects of moistening the skin and promoting skin hydration, and is free of irritation and sensitization to the skin; repeated uncovering and pasting can be achieved, and the viscosity influence is small.

The present invention is directed to the tartrate salt of a FAK inhibitor defined by formula I below, and the use of that inhibitor for treating a proliferative disease:

The invention discloses a neutral organic chelating cleaning agent for a boiler, and belongs to the field of chemical cleaning of boiler superheaters of thermal power plants. The cleaning agent is prepared from the following components in percentage by weight: 0.5%-5% of ethylenediamine tetraacetic acid ammonium, 0.1%-4% of acetic acid or ammonium acetate, 0.1%-3% of glycollic acid ammonium or glycollic acid, 0.1%-5% of a pH regulator, 0.1%-1% of a cosolvent, 0.2%-0.8% of a corrosion inhibitor SH369, 0.1%-0.6% of a reducing agent, 0.0%-0.3% of a defoaming agent, 0.0%-0.2% of a surfactant and 84%-93% of water, wherein the pH value of the cleaning agent is 6-8; the cosolvent is tartaric acid and / or hydroxybutyl diacid, the surfactant is nonylphenol polyoxyethylene ether, and the reducing agent is hydrazine. The cleaning agent disclosed by the invention has good dissolving capacity on oxide skin, does not generate precipitates to cause pipe blockage, is a neutral solution, is very small in corrosivity, does not generate intergranular corrosion, is beneficial to protecting various pipes of superheaters and reheaters, and is a safe and efficient superheater cleaning agent.

The invention provides a lime-sand polymerized building material for inhibiting saltpetering and a preparation method thereof, and belongs to the technical field of novel building materials, the material comprises a composite matrix material, a composite alkali activator, a slow-release organic acid microcapsule, a modified layered double-metal hydroxide and an saltpetering inhibiting auxiliary agent; the composite base material is formed by compounding fly ash and slag; the composite alkali activator is compounded by water glass and a NaOH aqueous solution; the slow-release organic acid microcapsule is prepared by coating a compound acid formed by mixing citric acid and tartaric acid with hydroxypropyl-beta-cyclodextrin and sodium alginate; the modified layered double hydroxide is prepared by calcining MgAl-LDH, then carrying out surface modification by a silane coupling agent, and then loading nano SiO2; the saltpetering inhibition auxiliary agent is compounded by phytic acid modified lignin microcapsules and thermal response carbonate; the phytic acid modified lignin microcapsule is prepared by modifying sodium lignin sulfonate with phytic acid and then coating with ethyl cellulose and polyvinyl alcohol; the thermal response carbonate is prepared by coating calcium carbonate with stearic acid.

The invention discloses an aspirin enteric-coated micro-tablet capsule and a preparation method thereof. The micro-tablet core auxiliary materials of the enteric-coated micro-tablet capsule comprise an excipient, a disintegrating agent, a stabilizer, a flow aid and a lubricant. Tartaric acid is adopted as a stabilizer of aspirin, gel silicon dioxide is adopted as a flow aid, a moisture absorption agent and a swelling agent, and a direct powder tabletting method is adopted to prepare a micro-tablet core; the invention provides the aspirin enteric-coated micro-tablet capsule which is good in powder flowability, stable and easy to control in process, good in stability, uniform in dissolution and release characteristics, stable in blood concentration and high in bioavailability.

The invention discloses construction and application of an Escherichia coli engineering strain capable of synthesizing tartaric acid by using ethylene glycol, establishes a new way for synthesizing tartaric acid by using ethylene glycol, and generates tartaric acid by using ethylene glycol as a substrate.

The present invention relates to the technical field of the preparation of polyols. Disclosed are a method for preparing a bio-based polyol and a use of the bio-based polyol. In the present invention, a tartrate is selected as a first ring-opening reagent to carry out a first ring-opening reaction on an epoxy group, a second ring-opening reagent containing a secondary alcohol is then used to carry out a second ring-opening reaction, and finally, a primary alcohol is used to carry out a third ring-opening reaction on the rest epoxy group to obtain a bio-based polyol product having an epoxy value close to 0. The bio-based polyol prepared in the present invention is moderate, has a uniform distribution and a relatively low viscosity, and can replace traditional petrochemical polyols. A polyurethane coating prepared from the bio-based polyol prepared by the method of the present invention has remarkably improved performance.

The invention relates to an atherosclerosis animal model feed. The atherosclerosis animal model feed comprises the following raw materials in parts by weight: 20-30 parts of casein, 0.2-0.4 part of sulfur-containing amino acid, 15-25 parts of corn starch, 5-10 parts of maltodextrin, 10-15 parts of fructose, 4-6 parts of cellulose, 15-30 parts of a high-fat substance, 0.2-0.3 part of choline tartrate, 1-2 parts of cholesterol, 3-6 parts of a mineral premix and 0.1-0.2 part of a vitamin premix, the raw material components can be directly mixed, or part of grease is pre-emulsified by adopting vitamin D3, and then the emulsified grease is mixed with other raw materials. According to the invention, the formula components of the feed are optimized, the lard oil and the anhydrous cream are used as high-fat components, and the fructose is used as a main carbon-water source; in addition, the step of adding high-fat substances is optimized, a process of pre-emulsifying part of grease is adopted, an animal model prepared from the feed is closer to the occurrence and development process of human atherosclerosis in the aspects of heredity, lipid metabolism and the like, and the animal model is more suitable for screening drugs for treating atherosclerosis.

The invention discloses a self-leveling capillary crystalline waterproof coating and a preparation method thereof, the waterproof coating comprises a component A and a component B, the component A comprises water and polyvinyl alcohol, the component B comprises cement, quartz sand, an active crystalline chemical substance and tartaric acid, and the component A and the component B are respectively prepared during preparation; uniformly mixing the components in the component A to obtain the component A; uniformly mixing the components in the component B to obtain the component B, and mixing the component A and the component B during use; the waterproof coating can independently complete sufficient permeation of active crystalline substances through self-water-locking without a maintenance process, can improve the waterproof performance of a concrete base layer, can form a self-waterproof layer, can seal a ventilation channel between concrete and the outside, prevents construction bubbles of a next waterproof or decorative coating from being generated, and improves the waterproof performance of the concrete base layer. In addition, the leveling agent has excellent self-leveling performance and can easily achieve the leveling function on a concrete foundation, for example, waterproof coiled materials can be directly laid on the leveling agent, and extra operations such as polishing and leveling are not needed.

The invention relates to a fully-synthetic cleaning agent as well as a preparation method and application thereof. The fully-synthetic cleaning agent comprises a chelating agent, a pH regulator, a surfactant, a solubilizer and pure water, the chelating agent comprises a combination of magnesium citrate, tetrasodium glutamate diacetate, tartaric acid, nitrilotriacetic acid and 1-hydroxyethylidene-1, 1-diphosphonic acid. The total synthesis cleaning agent provided by the invention can effectively remove residual cutting fluid on an aluminum alloy workpiece, especially zinc stearate or lubricating grease on a pure aluminum workpiece in a short time, does not corrode an aluminum pipe, is easy to rinse, is beneficial to keeping the original gloss and chromatic aberration of the product workpiece, is good in safety, does not harm human health, and is suitable for industrial production. Sewage treatment is simple, and cost is low.

The invention discloses a reagent combination, an analyzer and a detection method for detecting beryllium element content in a water sample. The reagent combination is composed of a color developing agent, a masking agent, a buffer solution and a catalytic solution. The color developing agent comprises chrome cyanine R; the masking agent comprises EDTA (Ethylene Diamine Tetraacetic Acid), ascorbic acid, tartaric acid and ethylene glycol amine; the buffer solution comprises ammonium acetate and hydrochloric acid; the catalytic liquid comprises hexadecylpyridinium chloride. Compared with a standard method, the adopted reagents have the advantages that the reaction steps are simplified, the stability of the reagents is better, the shelf life is longer, the reagents such as ammonia water and hexamethylenetetramine used in the standard method not only have pungent smell and larger environmental pollution, but also are easy to volatilize and deteriorate, and are not beneficial to long-term storage, so that the long-term measurement result is deviated, and the accuracy of the detection result is improved. Reagents used in the method do not have the defects, and can be stored for a long time at normal temperature, so that the method can be suitable for unattended automatic instruments and automatic water quality monitoring stations.

The invention discloses a low-value plant fiber material recombined fireproof door core and a preparation method thereof, and relates to the field of fireproof materials. Comprising a plurality of veneers which are laminated and compounded, inorganic flame-retardant adhesive layers are arranged between every two adjacent veneers and on the surface of the veneer located on the outer side, and each inorganic flame-retardant adhesive layer comprises trisodium phosphate, a magnesium chloride solution, starch glue, boric acid, magnesium oxide, silicon dioxide, tartaric acid and an emulsifier. According to the fireproof door core, the inorganic flame-retardant adhesive and the veneers are subjected to multi-layer cross compounding, the heat-insulating fireproof layers are formed between the boards, and the surface inorganic flame-retardant adhesive layers can effectively prevent flame from directly burning the fiber veneers, so that the fireproof door core reaches a relatively high fireproof grade, the door core has high impact resistance and deformation resistance, the fiber materials are low-carbon and environment-friendly, and the fireproof door core is suitable for being popularized and used. The material has the advantages of light density, excellent sound insulation and heat insulation effects, no emission of harmful substances or harmful gases in the manufacturing process, and conformity to national industrial policies.

The invention discloses a fermented feed prepared from traditional Chinese medicine residues as well as a preparation method and application of the fermented feed. The fermented feed is prepared by mixing and fermenting a mixed bacteria solution formed by fermenting bacillus subtilis, bacillus coagulans, phaffia rhodozyma and lactobacillus plantarum with bran, soybean meal, rice husks, zeolite powder and honeysuckle dregs. The fermented feed disclosed by the invention increases the contents of microbial protein, lactic acid, ethanol, tartaric acid, acetic acid and lactic acid bacteria, contains various fermentation substances, can improve the appetite of animals and improve the palatability, and is high in nutritional value. Honeysuckle herb residues are used as main raw materials, so that the preparation method has the characteristic of low production cost, and the problem of environmental pollution caused by random discarding of herb residue wastes is solved.

The invention discloses a hydrogel patch for promoting blood circulation to remove meridian obstruction and a preparation method thereof. The formula of the hydrogel patch for promoting blood circulation to remove meridian obstruction comprises a traditional Chinese medicine concentrated solution for promoting blood circulation to remove meridian obstruction, an oil-in-water emulsion for promoting blood circulation to remove meridian obstruction, sodium polyacrylate, polyacrylic acid, glycerol, azone, dihydroxyaluminum aminoacetate, tartaric acid, disodium ethylene diamine tetraacetate, methylparaben and deionized water. The traditional Chinese medicine concentrated solution for promoting blood circulation to remove meridian obstruction is 70% ethanol extract of vinegar-processed rhizoma corydalis, ligusticum wallichii, philippine flemingia root, safflower, frankincense, myrrh, radix angelicae and liquorice; the oil-in-water emulsion capable of promoting blood circulation to remove meridian obstruction is prepared from a vinegar rhizoma corydalis sesame oil extract, wintergreen oil, methyl glucose sesquistearate, stearate, cetostearyl alcohol, polydimethylsiloxane and deionized water; the blood-activating collateral-dredging hydrogel patch has no skin irritation, belongs to weak sensitization, and has the function of assisting in relieving pain.

The invention relates to a method for removing heavy metal complexes in wastewater, which comprises the following steps: S1, preparing a PMS composite agent which is prepared by ball-milling the following raw materials in percentage by weight: 50-90% of persulfate, 5-30% of sulfite and 5-20% of pypocholoride; s2, the PMS composite agent obtained in the S1 is added into industrial wastewater containing a heavy metal complex, heavy metal in the heavy metal complex is Cu and one or more of Co, Cr, Ni, Pb and Zn, complex in the heavy metal complex is one or more of EDTA, NTA, citric acid, oxalic acid, tartaric acid and sorbic acid, the mixture is stirred and dissolved, alkali liquor is added to maintain the pH of the industrial wastewater to be 9.5-11.0, and the PMS composite agent is obtained after the reaction is completed. Carrying out Fenton-like oxidation complex breaking reaction, and carrying out post-treatment after the reaction is finished, so as to obtain the reclaimed water. According to the method, the purpose of removing the heavy metal complex in the wastewater by the in-situ activation of the persulfate is achieved under the condition of not additionally adding a catalyst or applying energy sources such as electricity, ultraviolet and the like.

The invention relates to the technical field of power electronic components, and discloses a fast charge-discharge aluminum electrolytic capacitor and a preparation method thereof. The fast charge and discharge aluminum electrolytic capacitor comprises a high-purity aluminum foil subjected to aluminum chloride-hydrochloric acid etching and oxalic acid-tartaric acid oxidation treatment, a porous electrolyte layer with the thickness of 0.015-0.020 mm, a composite organic-inorganic electrolyte and an aluminum shell packaging structure, the preparation method comprises the steps of aluminum foil processing, electrolyte cutting, winding and assembling, vacuum infusion under-0.09 to-0.095 MPa, staged aging charging under the condition of 70-90 DEG C, and finally packaging and forming. According to the method, a compact oxidation film is formed through anodic oxidation, the proportion of gamma-butyrolactone in the electrolyte is optimized, the staged voltage aging and vacuum infusion process is implemented, and the fast charging performance, high-temperature stability and overall reliability of the aluminum electrolytic capacitor are synergistically improved from the material level and the process level.

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 field of detection of release substances in tea leaves, and particularly relates to a method for detecting release kinetics of tea polyphenol in tea soup based on a near infrared spectrum. The method comprises the following steps: preparing tea soup samples at different time points through a gradient sampling method, determining the content of tea polyphenol as a reference value by adopting a national standard ferrous tartrate colorimetric method, and collecting spectral transmission data by utilizing a near infrared spectrometer. Preprocessing the spectrum data, constructing a machine learning model, and establishing a mapping relation between the spectrum variable and the tea polyphenol content; and evaluating model performance through a decision coefficient and a root-mean-square error, and screening an optimal prediction model. And based on a high-precision result predicted by the optimized model SVM, carrying out dynamic fitting analysis, and determining that the optimal dynamic model of tea polyphenol release is a Higuchi model. According to the method, non-invasive real-time monitoring of the tea polyphenol content is achieved, the accuracy rate of the prediction model reaches 0.99 or above, and rapid and accurate technical support is provided for tea quality evaluation and brewing process optimization.