98 results about "Sodium disulfite" patented technology

The invention provides a method for treating discharge wastewater of a waste lithium battery, which comprises the following steps: S1, pulping a lithium cobalt oxide material by using discharge wastewater, and adding a first oxidant for reaction to obtain primary oxidized slurry; s2, mixing the primary oxidized slurry with high-grade matte nickel, and adding a second oxidizing agent for reaction to obtain secondary oxidized slurry; s3, the secondary oxidation slurry and an iron circulation activating agent are mixed for acid leaching, a liquid phase is taken after solid-liquid separation, and metal leaching liquid containing nickel and cobalt is obtained; wherein the first oxidizing agent comprises persulfate, the second oxidizing agent is selected from hydrogen peroxide, and the iron circulation activating agent is at least one of sodium hydrosulfite or sodium pyrosulfite. According to the method, short-range efficient selective recovery of valuable metals is realized through cooperation of lithium cobalt oxide and high nickel matte, the influence on the environment is greatly reduced, and the economic cost of the process is reduced.

Disclosed herein are pharmaceutical formulations including epinephrine that have increased epinephrine retention over long-term storage, e.g., 30-months. In one aspect, a formulation includes: one or more of 0.1 mg / mL of epinephrine or a pharmaceutically acceptable salt thereof provided without any overage, a tonicity regulating agent including 8.2 mg / mL of sodium chloride, a pH adjusting agent including a mixture of 1.5 mg / mL sodium citrate dihydrate, 3.3 mg / mL of citric acid monohydrate, and, optionally, an as-needed amount of sodium hydroxide to maintain the pH level of the formulation within a range of 3.6 to 4.0, 0.075 mg / mL of sodium metabisulfite, and 4 μg / mL of ethylene diamine tetra-acetate disodium. The formulation has an API recovery of 94.5% or more after at least 30 months of storage at long-term storage conditions defined as 25° C.±2° C. at 1 atmosphere. In addition, in another aspect, a formulation includes 1 mg / mL of epinephrine and other ingredients.

The invention provides a preparation method of an edaravone and dextroborneol injection, the injection comprises edaravone, dextroborneol, propylene glycol and sodium pyrosulfite, in the preparation process, the propylene glycol accounting for 60%-85% of the prescription dosage and water accounting for 5%-25% of the prescription dosage are injected into a liquid preparation tank according to the volume ratio, the mixture is heated to 50-60 DEG C, edaravone is added and stirred to be dissolved, and the edaravone and dextroborneol injection is prepared. The preparation method comprises the following steps: dissolving propylene glycol in the remaining prescription dosage, adding dextroborneol which is dissolved by propylene glycol in the remaining prescription dosage in advance, uniformly stirring, adding water which is close to a constant volume, cooling to 25 DEG C or below, adding sodium pyrosulfite, adjusting the pH value to 4.0-5.0, and fixing the volume to a full volume. According to the preparation method of the edaravone dextroborneol injection, auxiliary materials in a specific proportion are matched with the preparation steps, the problem that raw material medicines are extremely easy to separate out in the preparation process is solved, the requirement of the preparation process for an industrial liquid preparation tank is low, industrial operation is convenient, and the preparation cost is low.

The invention discloses preparation and application of a pH-responsive slow-release hydration heat inhibitor, and belongs to the technical field of concrete admixtures. The inhibitor is slowly released in a cement paste alkaline environment, cement hydration is continuously slowed down, and the temperature cracking risk of concrete caused by hydration heat is reduced. The core component is a pH sustained release microsphere, and the pH sustained release microsphere is composed of octadecyl acrylate, Span 80, Tween 60, white oil, acrylic acid, allyl polyoxyethylene ether 500, N, N-methylene bisacrylamide, deionized water, tert-butyl hydroperoxide, sodium pyrosulfite and the like. The preparation method comprises the steps of mixing an oil phase and a water phase, emulsifying, reacting and the like. The inhibitor further comprises sorbitol and methanol, and is prepared through the steps of stirring, filtering, drying and the like. The inhibitor can effectively reduce the hydration heat of cement, delay the setting time and improve the compressive strength of concrete.

The invention provides a production process of an acute ischemic stroke neuroprotective agent, and particularly relates to a method for preparing an edaravone dextroborneol concentrated solution for injection, and the method comprises the following steps: adding a liquid medicine containing propylene glycol, edaravone, dextroborneol and sodium pyrosulfite into a liquid preparation tank; the temperature of the liquid medicine is controlled to be 0-50 DEG C, the pH value of the liquid medicine is adjusted to be 3.0-7.0, the liquid medicine is conveyed into an ampoule bottle through a conveying pipeline, the conveying pipeline is a pipe, and the ampoule bottle is filled with the liquid medicine through the pipe through a pump. According to the preparation method, the loss of effective components in the production and storage process of the liquid medicine is greatly reduced, the stability of the liquid medicine can be remarkably improved, and the preparation process is good in consistency, repeatable and suitable for industrial production.

Provided is a cosmetic containing ascorbic acid and / or a salt thereof, which has excellent stability and reduced irritation to the skin. The cosmetic according to the present invention contains ascorbic acid and / or a salt thereof, ultrapure water, and an antioxidant, and the salt of ascorbic acid is at least one selected from the group consisting of a trimethylamine salt, a triethylamine salt, a monoethanolamine salt, a triethanolamine salt, a pyridinium salt, an arginine salt, an ammonium salt, a sodium salt, a potassium salt, a calcium salt, a magnesium salt, and an aluminum salt of ascorbic acid. The antioxidant is glutathione or sodium pyrosulfite, the pH of the cosmetic material is adjusted to 5.0-7.0, and the dissolved oxygen content of the cosmetic material is 0-5 mg / L.

A method for increasing the softness and the relaxation of a dough comprising a) adding at least one endopeptidase having at least 60% identity to SEQ ID NO:1 or SEQ ID NO:2 to flour or to a dough comprising a flour, wherein no L-cystein and / or sodium metabisulfite is added to the dough; b) kneading the dough; and c) making the dough into an edible product.

The present disclosure discloses a composition for hair growth comprising Larix europea wood extract, Camellia sinesis leaf extract, Pisum sativum sprout extract, Curcuma longa (Turmeric) callus conditioned media, Hamamelis virginiana (Witch Hazel), Rosmarinus officinalis Leaf Oil, Glycerin, Glycine, Zinc Chloride, Sodium Metabisulfite, Gluconolactone, Sodium Benzoate, Calcium Gluconate, Tetrasodium ethylenediaminetetraacetic acid (EDTA), Saccharide Isomerate, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Propanediol, Biotinoyl Tripeptide- 1, Alpha Glucosyl Hesperidin, Caffeine, Hydrolyzed Pea Protein, Polyalkylene Glycol Mono Butyl Ether, Acrylates / C 10-30 Alkyl Acrylate Crosspolymer, Panthenol, Niacinamide, Arginine, PEG-40 Hydrogenated Castor Oil, Ethylhexylglycerin, Phenoxyethanol, and water is added to the composition until the desired volume is achieved. A method for preparing the composition for hair growth is also provided.

Oral liquid formulations are provided containing sodium picosulfate, magnesium citrate, citric acid, malic acid, and an antioxidant selected from potassium metabisulfite and sodium metabisulfite, wherein the antioxidant is present in the composition at a concentration of from about 0.002 M to about 0.1 M, and wherein the composition has a pH of from about 4.0 to about 6.5.

The utility model relates to the technical field of sodium pyrosulfite production and preparation, and discloses a sodium pyrosulfite powder drying and conveying device which comprises a drying tower, a powder collecting box installed on one side of the drying tower and a conveying mechanism installed in the powder collecting box. A drain outlet penetrates through the bottom face of one end, close to the drying tower, of the powder collecting box, a sealing door is hinged to the inner wall of the drain outlet, a moving mechanism is connected to the bottom face of the outer wall of the powder collecting box, a supporting assembly is connected to the output end of the moving mechanism, and the other end of the supporting assembly penetrates through the outer wall of the drying tower to the interior of the drying tower. According to the sodium pyrosulfite powder drying and conveying device, the sealing assembly is arranged at the discharging opening between the drying tower and the powder collecting box, the drying tower and the powder collecting box can be separated when the interior of the powder collecting box is cleaned, and then the situation that sodium pyrosulfite powder in the drying tower is polluted by cleaning sewage in the powder collecting box can be avoided.

The invention provides a spicy walnut kernel and a preparation method thereof, and belongs to the technical field of food processing. The Chinese prickly ash sesame walnut kernels disclosed by the invention comprise the following components in parts by weight: 800-1200 parts of walnut kernels, 40-60 parts of Chinese prickly ash oil, 3-8 parts of chili oil, 3-5 parts of white granulated sugar, 3-5 parts of edible salt, 1-5 parts of monosodium glutamate, 3-8 parts of garlic powder, 1-5 parts of ginger powder, 3-8 parts of white pepper, 1-5 parts of a yeast extract, 0.02-0.1 part of disodium 5 '-ribonucleotide, 0.05-0.2 part of a rosemary extract, 0.1-0.3 part of an acanthopanax senticosus extract, 3-7 parts of amomum tsao-ko and 0.05-0.15 part of D-sodium erythorbate. 0.1 to 0.2 part of epsilon-polylysine hydrochloride, 0.1 to 0.3 part of potassium sorbate and 0.02 to 0.04 part of sodium pyrosulfite. The spicy walnut kernels prepared by the method are crisp and delicious, the nutrition of the walnut kernels is not lost, and the spicy walnut kernels are spicy, fresh and fragrant and have a long shelf life.

The invention discloses a promethazine hydrochloride injection and a preparation method thereof, and relates to the technical field of pharmaceutical preparations. Every 1 mL of the promethazine hydrochloride injection is prepared from the following raw materials and auxiliary materials: 20 to 30 mg of promethazine hydrochloride, 0.3 to 0.8 mg of anhydrous sodium sulfite, 0.5 to 1.5 mg of sodium pyrosulfite, 0.02 to 0.08 mg of citrulline, 0.02 to 0.05 mg of gallic acid and the balance of water for injection. The stability of the promethazine hydrochloride injection can be improved, the impurity content can be reduced, and it can be guaranteed that bacterial endotoxin meets the production requirement in the long-term storage process.

The application discloses a plant genome DNA extraction reagent, which comprises Buffer 1 lysate, Buffer 2 precipitate and Buffer 3 combination liquid; the Buffer 1 lysate comprises sodium chloride, PVP40, sodium metabisulfite and SDS; wherein the concentration of the sodium chloride is 250-1200 mM; the mass percentage of the PVP40 is 0.5%-3%; the concentration of the sodium metabisulfite is 50-150 mM; and the mass percentage of the SDS is 0.7%-2.5%; the Buffer 2 precipitate comprises acetate; wherein the concentration of the acetate is 2.2-4.3 M; and the Buffer 3 combination liquid comprises guanidine hydrochloride; wherein the concentration of the guanidine hydrochloride is 0.5-2.5 M. The extraction reagent does not contain organic solvents such as phenol and chloroform, and can improve the removal rate of polyphenols.

The invention relates to the technical field of medicines, in particular to a preparation process of xantinol nicotinate injection and an impurity control method of the xantinol nicotinate injection. According to the process, water for injection is subjected to nitrogen deoxidation treatment, a whole-process nitrogen-sealed environment is maintained, xantinol nicotinate is gradually added in three times, and a multi-component synergistic stable system including hydroxypropyl-beta-cyclodextrin, N-acetyl-L-cysteine, L-methionine, diethylenetriamine pentaacetic acid, sodium metasulfite, sodium thiosulfate and the like is matched, so that the xantinol nicotinate injection is prepared. Double-molecular-weight dextran is introduced to regulate and control a microenvironment, an acetic acid-sodium acetate buffer system is introduced to optimize pH, and finally, high stability and low impurity generation of the finished injection at high temperature are realized through nitrogen replacement subpackaging and precise sterilization conditions. According to the method, the content and the purity of the xantinol nicotinate injection are remarkably improved, the impurity content during sterilization and storage is remarkably reduced, the safety and the effectiveness of drugs are guaranteed, and the method has important significance on optimization of a heat-sensitive injection process.

The invention includes a phenylephrine product including an aqueous phenylephrine solution, a tonicity adjusting agent, at least one pH adjusting agent, at least one buffering agent and water for injection, wherein the phenylephrine solution is does not comprise sodium metabisulfite, wherein the phenylephrine product is sterile and ready-to-use and contain an oxygen absorber to keep the oxygen dissolved below 1 ppm. The invention includes methods of making and using the phenylephrine product.

The flow aid for preparing highly fluid solidified loess provided by the present invention is mainly made of polyphosphate, polyquaternary ammonium salt and its derivatives, sodium metabisulfite, water retaining agent and water. It is characterized in that the mass percentage ratio of the polyphosphate, polyquaternary ammonium salt and its derivatives, water retaining agent, sodium metabisulfite and water is (2-5)%:(0.2-1)%:(0.2-0.8)%:(10-15)%:(75-85)%. The flow aid provided by the present invention effectively improves the comprehensive performance of the highly fluid solidified soil, obtains highly fluid solidified loess that meets the fluidity requirements, and ensures the quality of backfilling and filling projects.

The invention belongs to the technical field of textile decolorization treatment, and particularly relates to a two-component decolorizer for polyester textiles and a pretreatment method for recycling polyester textiles. The two-component decolorizer comprises component I and component II in a mass ratio of 1:2.2-3, component I comprises sodium hydroxide solution and sodium borohydride, and component II comprises sodium metabisulfite and sodium sulfite. Sodium borohydride is reacted with sodium metabisulfite and sodium sulfite in a strongly alkaline environment to generate a strongly reducing intermediate product for removing organic dye molecules from the textiles. The two-component decolorizer is suitable for decolorizing and recycling polyester textiles.

An onion product containing sodium metabisulfite, a flavor, a food-grade acid, onions, flavor, onions and an acidified solution comprising water and a food-grade acid, which allows for commercialized sterility of onion food as much as possible. Although may be otherwise prepared, the onion product is produced from a four-step filling process, including adding sodium pyrosulfite, a heat stable flavor, onion, an acidified solution comprising water and a food grade acid to a container, disinfecting, and optionally inverting the container.

The invention provides an anti-impact PS / ABS plate and a preparation method thereof, and the plate comprises the following components in parts by weight: 30-75 parts of polystyrene, 20-70 parts of an acrylonitrile-butadiene-styrene copolymer, 2-8 parts of sodium pyrosulfite-styrene-acrylonitrile copolymer core-shell microspheres, 2-8 parts of montmorillonoid with ethanolamine grafted on the surface, 2-5 parts of butyl stearate, 2-5 parts of 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 1-3 parts of a plasticizer, and 1-3 parts of an antioxidant. And 1 to 2 parts of 2, 6-butylated hydroxytoluene. According to the invention, sodium pyrosulfite-styrene-acrylonitrile copolymer core-shell microspheres and montmorillonoid grafted with ethanolamine on the surface are added into a mixed system of PS and ABS, so that PS / ABS is endowed with impact resistance.

The utility model relates to the technical field of sodium metabisulfite processing, in particular to a sodium metabisulfite sulfur feeding mechanism which comprises a barrel, a top cover is arranged at the top of the barrel, a sulfur feeding pipe is rotatably mounted in the center of the top cover, a plurality of sulfur discharging holes are formed in the lower portion of the outer side wall of the sulfur feeding pipe, and the sulfur discharging holes are communicated with the top cover. The top of the sulfur inlet pipe is connected with a gas conveying pipe through a rotary joint, the outer side wall of the sulfur inlet pipe is communicated with a plurality of stirring pipes, and a plurality of auxiliary holes are formed in the stirring pipes. According to the utility model, the sulfur inlet pipe is rotatably mounted on the top cover, when the sulfur inlet pipe needs to be cleaned, the rotary joint box gas conveying pipe is firstly disassembled, then the two lifting lugs are hooked by using a crane, and then a worker presses the fixing rod to enable the fixing rod to leave the through hole and enter the connecting hole, so that the fixation of the upper plate and the lower plate can be cancelled, and the separation of the top cover and the cylinder body is realized; the top cover can be lifted upwards by a crane, the sulfur inlet pipe is taken out from the cylinder, and a worker can conveniently clean the sulfur inlet pipe and the cylinder.

The invention discloses a production process of an ambroxol oral solution, and belongs to the technical field of chemical medicinal preparations, the production process comprises the following steps: adding an aqueous solution containing ambroxol hydrochloride, clenbuterol hydrochloride, sorbitol, propylene glycol, glycerol, hydroxyethyl cellulose, DL-tartaric acid and sodium benzoate into a reaction kettle, and uniformly stirring to obtain the ambroxol hydrochloride oral solution, the clenbuterol hydrochloride, the sorbitol, the propylene glycol, the glycerol, the hydroxyethyl cellulose, the DL-tartaric acid and the sodium benzoate; the preparation method comprises the following steps: preparing in a production system passivated by hydroxyethyl diamine tetraacetic acid trisodium salt, treating by a two-stage series hollow membrane contactor, and finally filling a glass bottle with a liquid medicine. According to the preparation method disclosed by the invention, on the basis of prescription adjustment without adding antioxidants such as sodium pyrosulfite and the like, the impurities of the medicine in the production and storage processes are obviously reduced, the product stability and the clinical medication safety are improved, and the preparation process is simple and stable to operate and suitable for industrial production.

The invention relates to a high-stability olea europaea compound which comprises an olea europaea leaf extract, sodium pyrosulfite and a lipoic acid clathrate compound, and the mass ratio of the olea europaea leaf extract to the sodium pyrosulfite to the lipoic acid clathrate compound is 1: (0.005-0.08): (1-1.5). According to the invention, the olive leaf extract is cross-linked and distributed in the lipoic acid inclusion compound, and the active substances of the olive leaf extract are subjected to multiple protection through the water-soluble antioxidant sodium pyrosulfite and the water / fat-soluble antioxidant lipoic acid; therefore, the problem that the core active ingredient oleuropein is degraded too fast along with the conditions of storage time, illumination or temperature rise and the like is solved, and the problem that the color of the product is darkened too fast due to the fact that the oleuropein and other polyphenol and flavone substances are oxidized can be effectively relieved.

The application discloses an aggregation-induced emission material with high fluorescence quantum yield and large stokes shift, a preparation method and application thereof, and belongs to the technical field of preparation of the aggregation-induced emission material. The preparation method comprises the following steps: obtaining an intermediate by means of Suzuki-Miyaura coupling reaction of an organic boric acid and bromosalicylaldehyde; and adding the intermediate, sodium metabisulfite and aminophenylthiophenol into an organic solvent, and then performing high-temperature reaction to prepare the aggregation-induced emission material. The aggregation-induced emission material is synthesized by means of a two-step method, can be rapidly and mass-produced, and has the advantages of high fluorescence efficiency, large stokes shift, good stability and the like.

The invention discloses a preparation method of a novel rapid penetrant, which is based on an esterification reaction of isooctyl alcohol, maleic anhydride and p-toluene sulfonic acid as raw materials and a sulfonation reaction of sodium pyrosulfite and a catalyst rapid penetrant T as raw materials. And high-selectivity continuous synthesis of the rapid penetrant T under mild conditions is realized by optimizing the process conditions of the reaction. By adopting the synergistic effect of sectional feeding and low temperature and low pressure, namely dynamic matching of sectional heating and pressure reduction of esterification reaction and sectional cooling and step-by-step feeding of sulfonation reaction, accurate matching of reaction conditions and reactant activity is realized, the safety and environmental influences generated during traditional high-temperature and high-pressure direct feeding are avoided, the production time is shortened, and the production efficiency is improved. The preparation method has the advantages of simple preparation process, low cost, energy saving, consumption reduction, safety, environmental protection, and facilitation of the realization of efficient and safe industrial production.

The application discloses a teramycin ketoprofen injection and a preparation method thereof, and belongs to the field of veterinary injections, and is characterized by the following formula components: teramycin, ketoprofen, a catalytic factor, an antioxidant and an injection solvent; the catalytic factor is a polyamide amine dendrimer; and the antioxidant is a mixture of one or more than two of thio-glycerol, sodium metabisulfite or sodium bisulfite. The application has the beneficial effects that the teramycin and the ketoprofen are used in combination, no pH regulator is needed after the polyamide amine dendrimer is added, and an aqueous injection is obtained by the combination of the two, has a rapid effect, is rapidly absorbed after administration, has a short action time, can play a synergistic role in sterilization and inflammation, can not only increase the curative effect of a single drug, but also improve the drug stability and the bioavailability.

This invention relates to the preparation technology of 1-bromoadamantane, and particularly to a method for preparing 1-bromoadamantane. The technical solution is as follows: adamantane and anhydrous ethanol are added to a reaction vessel, the temperature of the reaction vessel is maintained, and bromine is added dropwise, with the bromine content being 1.2 to 1.4 times the mass of adamantane; after the addition is complete, the temperature is maintained; stirring is started, and the temperature is raised and maintained for reaction multiple times; then the temperature is slowly raised to 85-88°C, and ethanol and unreacted bromine are distilled off. The temperature is then lowered to 40°C, and sodium metabisulfite solution is added dropwise to the reaction vessel. The mixture is then filtered, washed with water until neutral, centrifuged, and dried to obtain 1-bromoadamantane. The beneficial effects of this invention are: the amount of bromine added is small, saving production costs and reducing environmental pollution; the use of ethanol as the reaction solvent and the reflux reaction increase the dispersibility of the reaction between bromine and adamantane, ensuring a complete reaction and reducing the volatility of bromine; the yield of 1-bromoadamantane is 98.1%, and the purity is 99.2%.

This invention relates to the field of exhaust gas purification technology, specifically to an exhaust gas purification device for sodium metabisulfite production, comprising: a spray purification mechanism, wherein an exhaust gas emission mechanism is provided within the spray purification mechanism; the spray purification mechanism includes a sealed tank, a packing assembly frame is fixed in the middle of the inner cavity of the sealed tank, a pumping mechanism is fixed on the outer surface of the sealed tank, and a sealing plate fixed to the sealed tank is provided above the packing assembly frame. This invention uses a differential pressure velocimeter to monitor the exhaust gas flow rate in real time, and achieves adaptive adjustment in conjunction with the sealing airbag two of the exhaust frame assembly. The exhaust gas pressure drives the sealing airbag two to move, thereby controlling the number and range of opening air outlets, ensuring that the exhaust gas enters the purification reaction zone uniformly and stably, effectively improving the stability of exhaust gas introduction. The sealing airbag one can flexibly adjust the number of spray heads working according to the exhaust gas volume, reducing purification liquid waste while ensuring purification effect.

Systems, methods, and devices for electrodeposition of tungsten disulfide coatings are described. Electrodeposition of the coating includes coupling a power source to a surface of a substrate and to an electrode, immersing the surface of the substrate and the electrode into an aqueous solution, and forming a tungsten disulfide layer on the surface of the substrate. The surface is conductive, and the power source is a DC power source. The aqueous solution includes sodium metabisulfite, sodium tungstate, a surfactant, and a pH modifier. The tungsten disulfide layer is formed by applying, via the power source, a pulsed current to the surface of the substrate and the electrode in the aqueous solution and maintaining the pulsed current for a predetermined period of time.

The utility model provides a sodium pyrosulfite grading screening device which comprises a box body, a feeding port is formed in the top of the box body, at least two stages of screen cloth and scraping assemblies corresponding to the screen cloth are arranged in the box body, each stage of screen cloth is detachably connected to a screen cloth installation base, and the scraping assemblies are arranged on the screen cloth installation base. The screen installation bases are arranged on the two opposite wall faces of the box body, a vibration assembly is arranged in at least one screen installation base, the side wall of the box body is provided with coarse material outlets corresponding to all the stages of screens, the inner bottom face of the box body is provided with a discharging inclined face, and the outer side of the box body is provided with a fine material outlet connected with the discharging inclined face. The bottom face of the scraping assembly is attached to the screen and can do reciprocating motion towards the coarse material outlet. The sodium pyrosulfite classification screening device has a multi-stage vibration screening function, is better in screening effect and can meet the screening requirements of different products.

The invention discloses a kind of concrete water-washed sand deflocculant and preparation method thereof, the deflocculant includes 0.5 1 parts of air entraining agent, 0.1 0.2 parts of sodium lauryl sulfoacetate, 15 30 parts of sodium metabisulfite, 20 32 parts of sodium thiosulfate, 0.5 1 parts of triethanolamine, 35 49 parts of dimethicone, 2 5 parts of maltodextrin, 0.4 1 parts of cellulose, 0.5 1 parts of glyceryl monostearate.The deflocculant of the present invention can play the role of suspension stability, prevent the undesirable phenomenon that the system is unstable and fluidity is reduced due to particle aggregation, can effectively solve the concrete viscosity brought by flocculant, slump retention performance is insufficient, easy to separate the bad problems such as bleeding, and effectively reduce concrete viscosity, ensure construction performance and the quality of concrete after hardening.