392 results about "Sodium gluconate" patented technology

The invention belongs to the technical field of cement manufacturing, and particularly relates to high-strength weather-resistant environment-friendly cement and a preparation method thereof. The environment-friendly cement is prepared from the following raw materials in parts by mass: 40 to 55 parts of Portland cement, 15 to 25 parts of fly ash, 10 to 15 parts of slag powder, 6 to 12 parts of biomass reinforced composite mineral material, 2 to 4 parts of nano silicon dioxide, 1 to 4 parts of modified polymer emulsion and 1 to 3 parts of additive. The biomass reinforced composite mineral material is prepared from zeolite, bentonite, sepiolite and chitosan; the modified polymer emulsion comprises a modified polyacrylate emulsion and a modified polystyrene-butadiene emulsion in a mass ratio of (1-3): 1; the additive is prepared from basalt fiber, sodium lignin sulfonate, a rosin thermopolymer and sodium gluconate. The environment-friendly cement prepared by the invention not only has high strength and good weather resistance, but also remarkably reduces carbon footprint and saves natural resources.

The invention relates to the field of concrete preparation, and particularly discloses green low-carbon concrete prepared based on recycled aggregate and a preparation method of the green low-carbon concrete. The green low-carbon concrete is prepared from the following raw materials in parts by weight: 10-12 parts of fly ash, 20-30 parts of slag, 80-100 parts of modified recycled aggregate, 5-8 parts of an exciting agent, 15-20 parts of cement, 10-20 parts of water, 1-3 parts of sodium gluconate and 0.5-1.5 parts of a water reducing agent, and the modified recycled aggregate is recycled aggregate subjected to surface activation treatment; the preparation method comprises the following steps: sequentially adding and mixing the fly ash, the slag and the modified recycled aggregate, carrying out dry mixing at a rotating speed of 30-50r / min for 2-3min, adding the exciting agent, the water and the water reducing agent, and uniformly stirring to form a uniform concrete mixture; and curing to obtain the product. The composition can be used for engineering construction and has the advantages of being green, low in carbon and high in compressive strength.

The invention relates to the technical field of concrete product production, in particular to a residual slurry circulation formula, which comprises the following components by weight: 350-450kg / m < 3 > of cement; sand grains are 750-800 kg / m < 3 >; stone blocks are 900-1000 kg / m < 3 >; the residual slurry is 200-300kg / m < 3 >; 8.5-10.5 kg / m < 3 > of a water reducing agent; 80-85 kg / m < 3 > of water; and 20-25 kg / m < 3 > of an enhancer. According to the prepared residual slurry circulation formula, the residual slurry is mixed with new cement, active substances in the cement are supplemented, then sand grains and stones are added as aggregates and fill gaps, and sodium gluconate and silica fume are used in a matched mode, so that the water consumption is reduced, meanwhile, the mechanical strength of the recycled residual slurry after solidification is improved, and the service life of the residual slurry is prolonged. The residual slurry can be cyclically put into the production process, and the method has the beneficial effects of being environment-friendly and reducing the production cost.

The invention relates to the technical field of building material modification, in particular to an anti-freeze thawing-sulfate composite modifier and application thereof in a water-stable base layer. In road engineering, a water-stable base layer often faces the problems of freeze-thaw cycle and sulfate erosion damage. The key point of the technical scheme of the invention is as follows: on the basis of the mass of cement, a composite modifier is composed of the following components in percentage by mass: 2%-5% of sodium sulfate, 0.02%-0.05% of sodium gluconate, 0.4%-0.6% of polypropylene fiber, 0.1%-0.2% of steel fiber, 1%-3% of butadiene styrene rubber emulsion, 0.05%-0.5% of sodium carboxymethyl cellulose, 0.05%-0.1% of triethanolamine, 0.1%-0.5% of naphthalene water reducer, 0.005%-0.02% of air entraining agent, 8%-10% of silica fume and the like. The composite modifier is mainly used for the water-stabilized base, can effectively improve the freeze-thaw resistance and sulfate erosion resistance of the water-stabilized base, and prolongs the service life of a road.

The invention discloses a rare earth compound flocculant and a preparation method and application thereof.The rare earth compound flocculant is composed of a gluconic acid rare earth compound, a pyrithione rare earth compound and water, the content of the gluconic acid rare earth compound is 5-15 wt%, and the gluconic acid rare earth compound is prepared by reacting sodium gluconate with first chlorinated rare earth salt in water; the content of the pyrithione rare earth compound is 0.4-0.6 wt%, and the pyrithione rare earth compound is prepared by reacting sodium pyrithione with second chlorinated rare earth salt in water. According to the invention, rare earth ions have positive electricity, and show extremely strong coordination ability and high coordination number. Meanwhile, the surface of phaeodactylum tricornutum has electronegativity; therefore, when the rare earth ions are in contact with the phaeodactylum tricornutum, the rare earth ions and the phaeodactylum tricornutum can rapidly generate charge interaction, so that the phaeodactylum tricornutum is rapidly agglomerated and forms a lump, and then the lump

The invention relates to the technical field of reverse osmosis membrane maintenance, in particular to a cleaning scale inhibitor special for a reverse osmosis membrane and application of the cleaning scale inhibitor. The cleaning scale inhibitor provided by the invention comprises an agent A, an agent B and an agent C, the agent A comprises the following components in percentage by mass: 10-20% of organic phosphonic acid, 10-20% of polycarboxylic acid polymer, 5-10% of sulfamic acid, 3-8% of sodium gluconate and the balance of water; the agent B comprises 8-15% of an isothiazolinone bactericide, 5-10% of a nonionic surfactant, 3-8% of a chlorine bactericide, 2-5% of sodium dodecyl benzene sulfonate and the balance of water; and the agent C comprises 10-20% of sodium polyacrylate, 8-15% of sodium hexametaphosphate, 5-10% of citric acid, 3-8% of silicate and the balance of water. The cleaning scale inhibitor provided by the invention has an efficient cleaning effect on various pollutants, is environment-friendly, and does not cause chemical damage to a reverse osmosis membrane.

The invention relates to the technical field of glass cleaning agents, in particular to an environment-friendly cover plate glass cleaning agent and a preparation method thereof. The environment-friendly cover plate glass cleaning agent comprises the following raw materials in percentage by weight: 12-20% of inorganic base, 8-12% of a surfactant, 5-8% of a chelating agent, 3-5% of a humectant, 1-3% of an adsorbent, 1-3% of a dispersing agent, 0.3-1% of a buffering agent and the balance of deionized water, the surfactant is dodecyl glucoside and dodecyl ethyoxyl sulphobetaine, and the weight range ratio of the dodecyl glucoside to the dodecyl ethyoxyl sulphobetaine is (3-1): 1; the chelating agent is one or more of sodium gluconate, sodium polyaspartate and sodium polyepoxysuccinate. According to the present invention, the degradable surfactant and the degradable chelating agent are adopted, and the dispersant is added to modify the nanometer titanium dioxide, such that the low pollution property is achieved while the high decontamination efficiency and the anti-fingerprint ability are considered.

The invention relates to the technical field of alkaline zinc-manganese flow batteries, in particular to an alkaline flow battery based on carbon felt surface functionalization and electrolyte additive collaborative optimization. The surface functionalization of the carbon felt is that the carbon felt is modified by nitrogen-doped carbon dots, so that the pore size of the carbon felt is increased, the pore volume, the specific surface area and the hydrophilicity of the carbon felt are improved, the wettability of an electrolyte and the adsorption capacity to zinc atoms can be enhanced, and more zinc deposition sites are provided. Sodium gluconate is selected as an additive and is coordinated with zinc ions in the negative electrode electrolyte, so that the solvation structure of the zinc ions is changed. Through cooperative regulation and control of carbon felt modification and sodium gluconate, the zinc deposition morphology is changed, the zinc deposition is compact and uniform, the performance of the battery is improved, and the cycle life of the battery is prolonged. The invention has the advantages of outstanding performance, safety, environmental protection, low price and the like.

The invention discloses a high-performance ionic piezoelectric hydrogel system based on molecular network reconstruction and micro-nano structure coordinated regulation and an establishment method thereof, and the establishment method comprises the following steps: S1, mixing acrylamide, polyacrylamide, sodium gluconate and polyvinyl alcohol to prepare a pre-polymerized solution, and adding HCl into the pre-polymerized solution to obtain a mixed solution system; and S2, carrying out gradient cross-linking and ultraviolet curing on the mixed solution system to obtain the high-performance ionic piezoelectric hydrogel system based on molecular network reconstruction and micro-nano structure coordinated regulation. The sensitivity is improved by 66%, and the problem that a traditional material is insufficient in response to weak biological signals (such as pulse micro-vibration) is solved.

The present invention relates to a method of producing a carbonated composite:a. providing a particulate mineral material, wherein the mineral material comprises metal slag, wherein the metal slag comprises steel slag;b. providing a modifier, wherein the modifier comprises sodium gluconate;c. mixing the mineral material and the modifier with water to form a slurry;d. treating the slurry with carbon dioxide, to form a wet solid residue, wherein the concentration of carbon dioxide is greater than about 10 vol%; ande. drying the wet solid residue to form the carbonated composite.

The invention relates to the technical field of building materials, and discloses a steam-curing-free prefabricated concrete low-carbon early-strength water reducing agent which comprises the following components in parts by weight: 50-60 parts of a WPC1000-series polycarboxylic acid water reducing agent; 7 to 9 parts of sodium gluconate; 10 to 15 parts of nano silicon dioxide powder; 1 to 2 parts of perovskite type perovskite; 5-10 parts of slag powder or fly ash; the invention further provides a preparation method of the steam-curing-free precast concrete low-carbon early-strength water reducing agent and application of the steam-curing-free precast concrete low-carbon early-strength water reducing agent. By introducing the low-carbon mineral admixture, the nano silicon dioxide and the perovskite photocatalyst, the early strength of the concrete is improved, the carbon emission is reduced, the concrete is endowed with a self-cleaning function, and the dual goals of environmental protection and efficient construction are achieved.

The invention relates to low-cost retarded concrete and a preparation method thereof. The low-cost retarded concrete comprises the following components in parts by weight: 24-27 parts of cement, 6-8 parts of blast furnace slag powder, 5-8 parts of fly ash, 70-90 parts of fine aggregate, 2-7 parts of sludge incineration ash, 93-100 parts of coarse aggregate, 0.4-0.6 part of a water reducing agent, 0-0.25 part of a retarder and 12-21 parts of water. When the temperature of the production environment is lower than 30 DEG C, the retarder comprises sodium gluconate; when the temperature of the production environment is higher than or equal to 30 DEG C, the retarder further comprises white sugar. According to the invention, the sludge incineration ash is recycled, phosphate radicals dissolved in the sludge incineration ash are combined with calcium ions generated by cement hydration, and the calcium ions coat the surfaces of cement particles to hinder further hydration of cement, so that the purpose of retarding is achieved, and the cement can be retarded by increasing the mixing amount of the sludge incineration ash and the retarder. The retarded concrete meeting different setting time requirements can be prepared; other components in the sludge incineration ash can be subjected to secondary hydration reaction with calcium hydroxide generated by cement hydration, so that the durability of the concrete can be improved.

The invention relates to the technical field of electroplating, in particular to a nickel stripping agent, a preparation method of the nickel stripping agent and a nickel plating layer stripping method. The nickel stripping agent comprises the following raw materials: an oxidizing agent, a complexing agent, a dissolution promoter, a surfactant and a corrosion inhibitor, wherein the mass ratio of the oxidizing agent to the complexing agent to the dissolution promoter to the surfactant to the corrosion inhibitor is (4-15): (3-25): (1-11): (0.01-1): (0.01-5); wherein the oxidizing agent is nitrobenzoic acid; the complexing agent is one or more of 2-amino-2-methyl-1-propyl alcohol, acetylacetone, nitrilotriacetic acid, nitrilotriacetic acid sodium salt, acrylate, sodium gluconate and ethylenediamine hydrochloride; the dissolution promoter is an alcohol ether solvent. According to the nickel stripping agent, the oxidizing agent with relatively low toxicity and a non-toxic or low-toxicity non-volatile complexing system are adopted, nickel can be completely removed, a base material cannot be eroded, and the threat to the health of operators can be remarkably reduced.

The invention relates to the technical field of concrete, in particular to low-magnetism concrete. The low-magnetism concrete is prepared from the following raw materials: Portland cement, ash, fine aggregate, aluminum oxide modified coarse aggregate, an additive, graphene oxide modified basalt fiber and water, wherein the particle size of the fine aggregate comprises the following components in percentage by weight: 20%-50% of the particle size of 1-3mm, 20%-50% of the particle size of 3-5.5 mm and 0%-60% of the particle size of 5.5-10mm; the additive is obtained by compounding a water reducing agent and sodium gluconate.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides an ultra-low profile RTF copper foil surface treatment process which comprises the following steps of acid pickling, coarsening, curing, ashing, passivation, anti-oxidation, silanization and drying, and a coarsening additive is one or a mixture of two of NaWO4, NaMoO4, D-sodium gluconate and trisodium citrate. Through alternate circulation of multiple roughening and curing processes, the bonding force between crystal grains and the surface of the copper foil is remarkably enhanced, the copper powder falling phenomenon is thoroughly eliminated, and the anti-stripping strength is higher; the reverse copper foil prepared by the production process provided by the invention has ultra-low profile tolerance, the roughened surface Rz is less than or equal to 1.8 mu m, and the peel strength is more than or equal to 0.5 N / mm. The roughness is reduced on the basis of maintaining the peel strength of the copper foil, so that the obtained electrolytic copper foil is more beneficial to high-frequency signal transmission, and the applicability is wider.

The invention discloses a method for co-producing erythritol from trehalose mother liquor and sodium gluconate mother liquor. Belongs to the technical field of erythritol production. The invention discloses and provides a method for co-producing erythritol from trehalose mother liquor and sodium gluconate mother liquor, which comprises the following steps: adding the trehalose mother liquor and the sodium gluconate mother liquor into a fermentation culture medium, fermenting by using candida lipolytica, enabling the conversion rate of the fermented erythritol to be 70%, and simultaneously filtering by using different nanofiltration membranes, according to the method, the erythritol finished product is obtained, the trehalose and sodium gluconate mixed solution is also obtained, and the trehalose and sodium gluconate mixed solution can be added into fermentation liquor again after being dissolved, so that cyclic utilization is realized; the production efficiency is improved, and the cost is saved.

The invention provides an inorganic composite plugging agent suitable for fractured fluid channeling. The inorganic composite plugging agent is prepared from the following raw materials: 25%-35% of oil well cement, 8%-10% of a reinforcing agent, 0.5%-0.7% of a dispersing agent, 0.04%-0.05% of a retarder, 5%-8% of a suspending agent, 0.1%-0.15% of a pH regulator and the balance of water, the reinforcing agent is a mixture of lime, calcium carbonate and aluminum sulfate; the dispersing agent is a mixture of sodium polyphosphate, sodium dodecyl sulfate and sodium dodecyl benzene sulfonate; the retarder is a mixture of sodium gluconate, sulfonated tannin and borax; the suspending agent is a mixture of silicon dioxide, sodium bentonite and soil powder; the pH regulator is a mixture of sodium carbonate, sodium bicarbonate and sodium hydroxide. The invention also provides a preparation method and application for channeling and water plugging of an oil-water well. The inorganic composite plugging agent can solve the problems that an inorganic plugging agent is poor in pumpability and low in strength, and fractured fluid channeling plugging in an oil reservoir is difficult, and meets the requirements for channeling plugging and water plugging of conglomerate and sandstone with the well depth being 1000-5000 m and the temperature being 150 DEG C or above and a dual seepage system.

The invention discloses food-grade metal surface blackening liquid as well as a blackening process and application. The blackening liquid comprises a basic blackening component and a modified graphene solution, wherein the basic blackening liquid comprises 15-25 g / L of sodium pyrophosphate, 8-12 g / L of sodium molybdate, 20-30 g / L of sodium gluconate, 2-5 g / L of sodium erythorbate, a citric acid / sodium citrate buffer solution, 10-15 ml / L of polyethylene glycol and 0.5-1 ml / L of polysorbate 80; the modified graphene is PEI modified graphene oxide. According to the method, stubborn dirt is cleaned and peeled off through ultrasonic waves, and grease is degraded through photocatalysis of nano TiO2, so that the surface hydrophilicity is improved, and the adsorption uniformity of blackening liquid is enhanced; according to the method, Si-O-Si network crosslinking is optimized through staged heating (80 DEG C to 120 DEG C to 140 DEG C), the hardness and the adhesive force are improved, thermal stress concentration in a traditional process is avoided, meanwhile, raw material decomposition can be avoided at the temperature, and the safety of blackening liquid is further guaranteed.

The invention relates to a decarburization gasification slag green mortar concrete blender and a preparation method thereof. The invention relates to a bacillus pasteurii water-soluble fertilizer which comprises microbial mineralized bacteria liquid of bacillus pasteurii, microcapsules (shells of which are composed of gelatin calcium alginate composite layers and ZrO2 nano-coatings) for encapsulating sodium gluconate, steel slag powder (the particle size is less than 50 microns) subjected to carbon dioxide carbonization treatment, plasma modified powder of which the surface is grafted with a silane coupling agent, and rosin soap, wherein the shells of the microcapsules are composed of gelatin calcium alginate composite layers and ZrO2 nano-coatings; the steel slag powder is subjected to carbon dioxide carbonization treatment; a polycarboxylic acid water reducing agent, a naphthalene water reducing agent and the like. The preparation method comprises the following steps: carrying out mixed culture on the decarburized gasification slag and a microbial mineralized bacterial solution, carrying out plasma treatment on the HPMC, xanthan gum and steel slag powder, mixing the cellulose ether and the starch ether under the assistance of ultrasonic waves, packaging the retarder by a spray drying method, and mixing the modified steel slag powder and the microcapsules according to a specific mass ratio. According to the invention, a microorganism-microcapsule-steel slag synergistic system is combined with a plasma modification technology, so that high performance and greenization of the concrete blender are realized, and the strength, durability and other properties of concrete are improved.

The invention belongs to the technical field of micro-nano composite materials, and particularly relates to a chromium-based bimetallic sulfide-porous carbon composite material and a preparation method and application thereof. The preparation method of the chromium-based bimetallic sulfide-porous carbon composite material provided by the invention comprises the following steps: mixing chromium salt and zinc salt, or chromium salt and manganese salt with a sulfur source, sodium gluconate and a pore-forming agent, and preparing the composite material through heat treatment and vulcanization technologies. The chromium-zinc or chromium-manganese bimetallic sulfide-porous carbon composite material prepared by the preparation method has good structural stability and conductivity, and the cycling stability of a battery can be remarkably improved when the chromium-zinc or chromium-manganese bimetallic sulfide-porous carbon composite material is used as a battery material. The prepared chromium-based bimetallic sulfide-porous carbon composite material has important application value in the field of lithium ion battery electrode materials.

The invention relates to a multifunctional scale inhibition and dispersion agent applied to a reverse osmosis system and a preparation method of the multifunctional scale inhibition and dispersion agent. The multifunctional scale inhibition and dispersion agent comprises the following components in parts by mass: 6-9 parts of CS-GLU, 1.5-2.5 parts of ascorbic acid, 3-4.5 parts of polyaspartic acid, 1-2 parts of sodium gluconate, 2-4 parts of polyethylene glycol, 0.005-0.03 part of nano SiO2, 1-3.5 parts of triammonium citrate, 3-6 parts of acetic acid, 0.2-0.5 part of urea, 1-2.5 parts of EDTA-2Na and 65.47-81.295 parts of deionized water. A traditional scale inhibitor only depends on chemical chelation and has no repair and oxidation resistance. According to the product, chemical scale inhibition and physical repair (film formation and nano filling) are cooperated, and the limitation of a single function is broken through; an anti-oxidation system (ascorbic acid + EDTA) is arranged in the product to replace a dangerous reducing agent, so that the service life of the membrane is prolonged; a traditional scale inhibitor is sensitive to high-valence ions such as Fe < 3 + > and Al < 3 + > and is narrow in applicable water quality range. The charge of the product is adapted to zwitterionic characteristics, and deposition pollution of a traditional anionic scale inhibitor is avoided.

The invention relates to the technical field of circulating water corrosion inhibition, in particular to an industrial circulating water corrosion inhibitor and a preparation method thereof.The industrial circulating water corrosion inhibitor is prepared from sodium hexametaphosphate, hydroxyethylidene diphosphonic acid, amino trimethylene phosphonic acid, sodium gluconate, sodium polyacrylate, zinc sulfate, benzotriazole, polyaspartic acid, sodium molybdate and deionized water, and the industrial circulating water corrosion inhibitor is prepared from, by weight, sodium hexametaphosphate, hydroxyethylidene diphosphonic acid, amino trimethylene phosphonic acid, sodium gluconate, sodium polyacrylate, zinc sulfate, benzotriazole, polyaspartic acid, sodium molybdate and deionized water. By compounding various corrosion inhibition components such as sodium hexametaphosphate, hydroxyethylidene diphosphonic acid and amino trimethylene phosphonic acid, the composite corrosion inhibitor with a synergistic corrosion inhibition effect is formed, excellent corrosion inhibition performance can be provided under various working conditions, and the corrosion inhibitor does not generate harmful byproducts in the use process, is environment-friendly, and is suitable for industrial production. The corrosion inhibitor has good compatibility with other water treatment agents and can be jointly used in a circulating water system, and the overall performance of the system is improved.

The invention relates to a panel material of a thermal insulation board, which is formed by curing panel slurry. The panel slurry is prepared from 26%-34% of cement, 38%-50% of quartz sand, 3%-10% of secondary coal ash, 2%-4% of silica fume, 0.6%-3% of a water reducing agent, 0.1%-1% of a defoaming agent, 0.1%-2% of an alkaline exciting agent, 0.1%-0.8% of graphene oxide grafted carbon fibers, 0.05%-1.5% of carboxymethylcellulose, 0.05%-1% of sodium gluconate, 0.8%-2.5% of an anti-corrosion inhibitor, 0.5%-2% of low-temperature water-based emulsion and 10%-16% of water. The sum of the percentages of the components is 100%. The panel prepared by the invention has the advantages of high compressive strength, breaking strength and corrosion resistance under the condition of smaller thickness (0.3-2cm), difficulty in cracking during drilling and the like, the service life of the thermal insulation board is prolonged, and the safety of the thermal insulation board is improved.

The invention provides an industrial cleaning agent and a preparation method thereof, and the cleaning agent is prepared from the following raw materials by weight: 0.05-0.1% of sodium hydroxide, 0.2-0.3% of sodium gluconate, 1-2% of secondary alkyl sodium sulfonate, 1.5-2% of polyol, 1-1.5% of amino trimethylene phosphonic acid, 0.3-0.6% of gluconic acid-delta-lactone, 0.6-1% of glycerin, 0.8-1.2% of propylene glycol butyl ether, 0.05-0.075% of a modified polyether defoamer, and the balance of water. And the balance of water. The modified polyether defoaming agent is obtained by sequentially reacting alkenyl polyether with # imgabs0 # and hydrogen-containing silicone oil. The cleaning agent provided by the invention has better defoaming effect, lower corrosivity and higher stability, and also has the advantages that the preparation method is simple and easy to operate, and the cleaning agent is suitable for large-scale industrial production.

The invention belongs to the technical field of silicon material cleaning, and particularly relates to a silicon material cleaning agent and a preparation method and application thereof. The silicon material cleaning agent provided by the invention comprises the following components in parts by mass: 50-60 parts of water; 15 to 30 parts of an acidic etching solution; 10 to 20 parts of a first chelating agent; 10 to 20 parts of a second chelating agent; 0.5 to 5 parts of a surfactant; 5 to 15 parts of a builder; wherein the first chelating agent is selected from at least one of 1-hydroxyethylidene-1, 1-diphosphonic acid or ethylenediaminetetraacetic acid; the second chelating agent is selected from at least one of citric acid, gluconic acid, tartaric acid, malic acid, sodium citrate, sodium gluconate, potassium pyrophosphate and sodium pyrophosphate. The silicon material cleaning agent is used for silicon material cleaning, various metal ions can be cleaned at a time, the silicon material cleaning efficiency is improved, and the industrial cost is effectively reduced.

The invention discloses a bromelain composition for treating cow mastitis and application of the bromelain composition, and belongs to the technical field of biological medicine. The composition is prepared by compounding the following components in parts by weight: 1-20 parts of bromelain, 1-20 parts of cystine and 1-20 parts of sodium gluconate. 4 to 40 parts of cystine; and 0.2 to 2 parts of sodium gluconate. The bromelain composition has the effects of diminishing swelling, dispersing blood stasis, clearing heat, detoxifying, diminishing inflammation and the like, and is small in toxic and side effects, not easy to generate drug resistance, high in bioavailability, high in curative effect on cow mastitis caused by pathogenic bacteria infection, free of residues, free of drug resistance, green and safe. The bromelain composition for treating cow mastitis can reduce the number of somatic cells in cow's milk with mastitis and the content of ALP, NAG and LDH in cow's milk and cow's serum in a short time, and has a good treatment effect on cow mastitis.

The application discloses an oil and gas field polymer solution viscosity protection system with improved ferrous ion tolerance, and belongs to the technical field of oil and gas field chemicals.The system comprises the following components in mass percentage: 5-10% of a ferrous ion stabilizer, 10-20% of a free radical capturing agent, 10-20% of a structure reinforcing agent, 5-10% of a synergist, and the balance of water; the ferrous ion stabilizer is at least one selected from sodium gluconate, potassium gluconate, diethylene triamine pentaacetic acid and hydroxyethylidene diphosphonic acid; the free radical capturing agent is a compound containing phenolic hydroxyl; the structure reinforcing agent is an imidazoline compound; and the synergist is an aldehyde compound.The application method of the viscosity protection system is as follows: the viscosity protection system is first added into liquid water, polymer powder is then added, a gel breaker is further added, and stirring is uniformly performed to obtain a polymer solution.The viscosity protection system significantly reduces the influence of ferrous ions on the viscosity of the polymer solution, and improves the application effect of polyacrylamide substances in the field of oil and gas fields.

The invention provides a preparation method of a boron adsorbent based on layered dihydroxide. The preparation method comprises the following steps: firstly, preparing layered dihydroxide LDHs from divalent metal salt M < 2 + > and trivalent metal salt M < 3 + >; then dispersing LDHs in a solvent to obtain slurry, adding a polyhydroxy organic matter into the slurry, and drying to obtain polyhydroxy organic matter intercalated hydrotalcite; the polyhydroxy organic matter is selected from meglumine, sodium gluconate, citric acid and / or tartaric acid, and finally calcining and grinding to obtain the boron adsorbent. According to the preparation method disclosed by the invention, the polyhydroxy organic matter is inserted, so that the obtained product has double effects of intercalation and surface functionalization, and active sites of reaction are increased while the interlayer spacing is increased, so that the adsorption capacity is greatly improved, and the adsorption capacity of the obtained product is remarkably higher than that of other adsorbents based on layered dihydroxide.

The invention relates to the technical field of chemical analysis, in particular to a high performance liquid chromatography detection method for a mixture of D-mannitol and sodium gluconate. According to the method disclosed by the invention, by changing components of a mobile phase and diluting a sample in a proper proportion, complete separation of the D-mannitol and the sodium gluconate in a liquid chromatogram can be achieved, and meanwhile, the D-mannitol and the sodium gluconate are accurately and quantitatively detected. Linear, precision, repeatability, detection limit, quantitation limit and recovery rate experiments are carried out on the method for determining the content of D-mannitol and sodium gluconate, all the experiments meet the requirements of GB / T27404-2008 Laboratory Quality Control Standards, and it is proved that the method for determining the content is scientific and effective. The method disclosed by the invention is simple to operate, and by adopting the method disclosed by the invention, the detection time of each batch of samples is only 15 minutes, so that the detection efficiency is greatly improved.

The invention relates to the technical field of catalyst preparation, and discloses a carbon modified copper-based catalyst and a preparation method and application thereof. The method comprises the following steps: (1) sequentially carrying out coprecipitation and aging on an alkaline precipitant solution, a metal salt solution and an anion modifier solution to obtain an intermediate product I; and (2) under the condition that the oxygen concentration is not higher than 5% by volume, roasting the intermediate product I to obtain the carbon modified copper-based catalyst, the anion modifier solution contains sodium dodecyl diphenyl ether disulfonate and sodium gluconate in a molar ratio of 1: (1-10); the pH value of the anion modifier solution is 9-11; the metal salt solution contains zinc salt, copper salt and aluminum salt. The prepared carbon modified copper-based catalyst has the advantages of high conversion per pass of carbon dioxide, low activation temperature, high methanol selectivity, long-period operation and stable structure.