174results about How to "PH value is stable" patented technology

The invention relates to a water circulating ecological system for aquaculture. The water circulating ecological system comprises an aquaculture main body ecological breeding tank, a biological purifying tank, a water purifying tank and a residue treatment ecological breeding tank. Environmental engineering for ecological breeding is constructed by the water circulating ecological system, and the breeding environment is controlled and optimized, so that aquaculture breeding dirt is cleared up by virtue of ecological mating of microorganism, plants and animals, and therefore, water self-cleaning effect of an ecological environment is achieved. By virtue of a recycling economy mode, the water is self-cleaned and utilized in a multi-stage manner to form an industrial chain of a plurality of products, so that duplex economic value added effect is produced. The production system ecologically controls the aquaculture, so that breeding water can be saved for over 70%, and water quality is regulated and optimized, and therefore, healthy aquaculture is implemented.

The invention relates to a cleaning and rust inhibiting agent and a preparation method thereof, pertaining to chemical cleaning agent field, and the cleaning and rust inhibiting agent consists of the components: 1 to 2 percent of ethylenediamine tetraacetic acid solution, 3 to 4 percent of triethanolamine solution, 0.5 to 1 percent of eynanolamine solution, 5 to 10 percent of compound borate ester solution, 5 to 10 percent of polyacrylic acid solution, 1 to 3 percent of triazine disinfectant solution, and the other is water to be added into 100 percent. The cleaning and rust inhibiting agent is prepared through a scientific processing technology by using organic acid, surfactant and disinfectant as main materials, without needing to be rinsed after cleaning, and the surfaces of cleaned parts have no white spot and are as shiny as new ones, thus reaching the rust inhibiting requirements of a workshop. The product is weak alkaline, and has advantages of wide sources, easy acquiring, small using quantity and strong cleaning ability to such processing oil as rust inhibiting oil, emulsified oil, cutting fluid, oleostearine, transformer oil, etc., which is particularly applied to the cleaning and rust inhibiting for steel and aluminum materials.

The invention relates to a normal temperature spraying detergent for aluminum alloy and a preparation method thereof. The detergent comprises the following raw materials in percentage by weight: 1 to 5 percent of ethylene diamine tetraacetic acid, 0.5 to 1.5 percent of sodium metasilicate pentahydrate, 5 to 8 percent of sodium gluconate, 5 to 10 percent of heterogeneous alcohol ether, 2 to 7 percent of solubilizing agent, 3 to 8 percent of surfactant, and the balance of water. The detergent can be used at normal temperature, and does not need heating so as to save the energy; the detergent does not corrode the treated aluminum alloy parts, does not leave white spots on the surfaces of the parts, and can increase the brightness of the parts; and the detergent has long service life and low using concentration, is safe and environment-friendly, saves the working time, and improves the working efficiency.

The present invention magnesium alloy material surface phosphatizing solution and its treating process. The surface phosphatizing solution consists of 85 % concentration phosphoric acid solution in 10-20 ml/l, zinc oxide in 1-5 g/l, sodium fluoride in 1-3 g/l, sodium nitrate in 0.1-0.4 g/l, hydrogen peroxide in 0.5-1 g/l and water for the rest. Hydrogen peroxide is adopted as the promoter to speed film formation and raise the corrosion resistance of the produced conversion film and adhesion of the lacquer film, and as the environment friendly oxidant. The surface phosphatizing solution has simple composition, easy control, stable technological process and low cost, and is suitable for industrial production.

The invention discloses a solid fixation alkaline agent for pad steaming process dyeing through reactive dyes, comprising the following components in percentage by weight: 15-30 percent of alkali metal hydroxide, 60-45 percent of alkali metal carbonate, 16-10 percent of alkali metal phosphate, 1-2 percent of chelator, 2-3 percent of alkali-resistant penetrating agent, 4-8 percent of cosolvent and 1-2 percent of color light protective agent. The alkaline agent is characterized in little dosage, convenient manufacturing and transportation, etc., and has the advantages that production cost can be reduced and environmental pollution is reduced. The alkaline agent meets the requirements on efficiency increase, emission reduction and clean production, and is sufficient to replace the prior fixation soda ash for pad steaming process dyeing through reactive dyes.

The present invention belongs to the field of sodium glutamate waste liquid treatment in biological fermentation industry, and discloses a sodium glutamate fermentation waste liquid treatment process, which comprises: (1) preparing a sodium glutamate-containing fermentation broth, (2) filtering, (3) carrying out decolorizing, concentration and primary crystallization, (4) carrying out secondary crystallization, (5) carrying out sewage treatment, and (6) preparing the feed. The treatment process of the present invention has characteristics of substantial production cost reducing, simple production process operation, wastewater treatment burden reducing, good economic benefit achieving, and good environmental protection benefit achieving.

The invention relates to a special protein liquid compound quality control serum with high stability for biochemistry, and belongs to the technical field of clinical in-vitro detection. The quality control serum is a compound liquid quality control serum which is mainly prepared from protective substances such as a buffer solution, a metal chelating agent, a surfactant, a protective agent, an ionic equilibrium agent and a preservative, and the quality control serum can detect 12 substances of antistreptococcic O, C reactive protein, a complement C3, a complement C4, IgM, IgA, IgG, prealbumin, rheumatoid factors, transferrin, total protein and albumin. Serving as the quality control serum of the 12 substances, the quality control serum has the advantages of being convenient to use and high in stability.

The invention discloses an advanced aquarium filtering material with a far infrared ray and a preparation method thereof, and belongs to the field of aquatic filtering materials. The filtering material is of a hollow cylindrical shape or a square three-dimensional shape and is prepared from the following raw materials in part by weight: 20 parts of tourmaline, 8 parts of diatomaceous earth, 40 parts of attaclay, 15 parts of albite powder, 5 parts of quartz powder and 12 parts of organic foaming particle. The finished product can be obtained by the following steps: raw material mixing, extrusion molding, drying, and certain curve sintering. The filtering material has the advantages that the filter material has good permeability, can well absorb and remove annonia, nitrite, hydrogen sulfide, heavy metal and other harmful substances decomposed from water and effectively inhibit the excessive multiplication and growth of algological organisms, and has good absorption effect on tangible impurities to achieve the effects of cleaning water, stabilizing pH value of water and softening water, thereby being the best choice for biological filtration.

The preparation process of nanotube oriented nano zinc oxide material includes dissolving zinc salt, ammonia water, thiourea and ammonium salt in certain proportion in deionized water to prepare film growing reaction solution; and soaking processed substrate inside the reaction solution, ultrasonic treatment for 35-40 min, heating to 94-97 deg.c to reaction for 45-60 min to obtain compact nanotube oriented nano zinc oxide material. The said process of the present invention is simple, low in cost and short in production period, and the prepared nano zinc oxide material consists of oriented nanotube of average diameter of 500 nm, thickness of 100 nm and length of 6 micron.

The invention provides a liquid-based thin-layer cell preserving fluid. The preserving fluid comprises the following components in percentage by mass: 5-6.5% of a pH buffer solution, 0.3-0.5% of a chelating agent, 0.2-0.8% of an osmotic pressure maintaining agent, 10-26% of a cell fixing agent, 0.1-5% of a preservative, 0.5-10% of a hemolytic agent, 1-4% of a water-soluble adhesive and 66-80% of ultrapure water. The liquid-based thin-layer cell preserving fluid can keep the stability of a cell structure well and keep the pH value stable, so that cells are not easy to agglomerate, and pathological examination is facilitated.

A counter typing reagent of ABO blood type is prepared as improving buffer system to change single citrate buffer system to be citrate-phosphate double-buffer system, adding adenine as nutrition composition, applying no any chemical anticorrosive in anticorrosion system and adding EDTA for preventing red blood cell of blood type from hemolysis.

The invention discloses a chromium-free passivation solution, which has the pH value 1-5 and consists of rare-earth salt, inorganic salt, boric acid, nitric acid and water serving as raw materials. In the chromium-free passivation solution, the content of the rare earth salt is 1-15 g/L, the content of the inorganic salt is 3-30 g/L, the content of the boric acid is 0.1-3 g/L, and the content of the nitric acid is 3-30 ml/L; the rare earth salt is a mixture of vanadate and cerium slat in the weight ratio 1:(1.33-6.5); and the inorganic salt is sodium chloride or potassium chloride. The chromium-free passivation solution has the advantages of good passivation effect, low application cost, high production efficiency, stable performance, difficulty in deteriorating and long storage time.

The invention discloses food additives for a grain beverage. The food additives comprise the follow components by weight part: 40 to 55 weight parts of glycerin monostearate, 10 to 20 weight parts of carrageenin, 15 to 25 weight parts of xanthan gum, 10 to 20 weight parts of guar gum and 10 to 20 weight parts of sodium citrate. The grain beverage stabilizer is prepared by using emulsifier, thickener, acidity regulator, and the like, as the raw materials and mixing the materials based on a ratio. The stabilizer can stabilize the grain beverage, prevent the phenomena of delamination, sediment, bleeding, gel, and the like in the storage period, and keep the grain beverage stable and uniform.

The invention relates to the process field of bamboo shoot processing, and specially relates to a warm-water fermenting method for boiled bamboo shoots, which is applied to a production process of processing boiled bamboo shoot cans. The invention aims to provide a warm-water fermenting method for boiled bamboo shoots, which reduces the processing procedures in the production process of processing boiled bamboo shoot cans, and shortens the fermentation time. The warm-water fermenting method for boiled bamboo shoots, provided by the invention, comprises the following steps of: 1, boiling cleaned bamboo shoots with shells for 60-80 minutes, and changing the water for cooling for 25-35 minutes; 2, shelling the bamboo shoots obtained in the step 1, cleaning the bamboo shoots and then placing the bamboo shoots into a container, adding warm water at the temperature of 35-37 DEG C into the container for soaking the bamboo shoots for 11-12 hours, and then changing warm water at the temperature of 35-37 DEG C for soaking the bamboo shoots for 11-12 hours; and 3, changing the water, carrying out sterilization on the bamboo shoots for 110-130 minutes at the temperature of 95-97 DEG C, and then, sealing the bamboo shoots. Compared with traditional boiled bamboo shoot making methods, the method provided by the invention reduces the processing procedures and shortens the fermentation time, finished products are uneasy to decay, a can-expanding phenomenon is uneasy to occur, the pH value is stable, the operation process is simple and convenient, and the production efficiency is high, therefore, the method is suitable for the large-scale application in the canned boiled bamboo shoot processing industry.

The invention relates to the field of cutting fluid for machining, in particular to synthetic ester environment-friendly type aluminum alloy cutting emulsified oil and a preparing method thereof. The synthetic ester environment-friendly type aluminum alloy cutting emulsified oil is prepared from, by weight, 20-30 g of base oil, 10-22 g of high-temperature resistance synthetic ester, 10-30 g of high-saponification value synthetic ester, 4-8 g of a first anti-rusting agent, 2-4 g of a second anti-rusting agent, 4-12 g of an emulsifying agent with the HLB value higher than or equal to 10, 6-16 g of an emulsifying agent with the HLB value lower than or equal to 6, 1-3 g of an emulsion multifunctional assistant, 1-3 g of an aluminum alloy corrosion inhibiting agent, 2-6 g of a coupling agent and 1-3 g of a sterilizing agent.

The invention discloses a formula of a gypsum binder. The gypsum binder comprises the following raw materials in parts by weight: 100 parts of desulfurized gypsum, 0-5 parts of polyvinyl alcohol, 0.1-0.7 part of methyl cellulose and 0-0.2 part of sodium citrate. The dry powder is evenly stirred and mixed to obtain the product. The test report indicates that the initial setting time is 30-100 minutes, the final setting time is 45-115 minutes, the folding strength is 2.3-2.9 MPa, the compression strength is 5.5-6.5 MPa, and the bonding (compression shear) strength is 0.40-0.9 MPa. The invention has the advantages of favorable stability, water retention and flow slide property, strong binding performance and favorable affinity, has the function of interfacial activity and greatly enhances the adhesive force between the product and the base material; and the invention has stable pH values, favorable lubricating property, favorable shrink resistance, favorable mildew resistance and the like, and does not need to use gauze at the seam, thereby having the advantages of firm binding and slight expansibility and preventing the phenomenon of cracking.

The present invention relates to an electrochemical coloring solution for stainless steel and coloring method, which is characterized in that the electrochemical coloring solution for stainless steel comprises the following components of 30-80g/L of molybdate, 10-18g/L sulfuric acid,2-5g/L of zinc sulfate, 0.5-5g/L of manganese sulfate, 10-20g/L of sodium nitrate, 0.1-10g/L of sodium malonate and solvent being water. The coloring method comprises (1) removing greasy dirt on the surface of the stainless steel by metal detergent, and then cleaning with hot water; (2) mechanically or electrolytically polishing stainless steel workpieces; (3) then cleaning with hot water; (4) coloring: placing stainless steel workpieces in the electrolytic bath filled with coloring solution, wherein stainless steel workpieces and lead plate are respectively taken as an anode and a cathode, the coloring voltage is 1.5-2.5V, the coloring current is 0.1-20A/dm<2> and the coloring time is 1-15 minutes; (5) washing and drying to obtain the finished product. The coloring solution and coloring method according to the invention can be used for producing high-quality stainless steel products which can meet the performance requirements and consistent color tones.

The invention provides a method for continuously dyeing yarns. The method comprises the following steps: selecting yarns as a dyeing raw material; selecting an azoic coupling component AS-BO as a prime liquid; dissolving the azoic coupling component; exhausting fluid for the yarns; diazotizing colorradical blue BB which is selected as a color developing agent; dissolving color salt; adding a neutralizer and antalkaline; performing a coupled developing process, controlling the concentration, pH value, temperature, time and other parameters during coupling; rinsing and soaping, and rinsing; and dyeing for the second time, calculating the dosage of a bottoming agent in refill and dosage added into caustic soda, and repeating the process of developing, rinsing, soaping and rinsing to complete continuous dyeing for yarns. According to the method, a dyeing method is improved, a repeated durable dyeing process operation is adopted, the stability for material dyeing is reinforced, the coloring effect is uniform, and defects occurring in single printing and dyeing process is avoided by means of repeated printing and dyeing.