75results about How to "PH has little effect" patented technology

The invention provides a preparation method of high-purity collagen protein sponge, and relates to a preparation method of collagen protein sponge. The preparation method of the high-purity collagen protein sponge is used for solving the problems that the collagen protein sponge prepared by using a conventional method is long in production cycle and low in yield and purity and has poor hemostasis performance. The preparation method of the high-purity collagen protein sponge comprises the following steps: step one. pretreating fresh bovine heel tendons; step two. extracting collagen protein; step three. centrifuging; step four. salting out; step five. dissolving; step six. carrying out gradient dialysis; step seven. pre-freezing; step eight. carrying out freeze drying; and step nine. sterilizing. The final product prepared by using the method has a smooth and flat surface and relatively good hemostatic performance and is uniform in pore size distribution. The product has relatively high purity (the total amount of amino acids reaches 97.73%), an obvious hemostatic effect and no abnormal taste, is safe, non-toxic, high in yield and short in time; liquid is clear without impurities; the production cycle is shortened; the whole preparation process is carried out at a room temperature; the biological activity of the collagen protein is maintained; and the application of the high-purity collagen protein sponge in clinical is improved.

The invention discloses a preparation process of carbon nano-tube modification polyaniline nano fiber conductivity composite material. The characteristics of the invention are that conducting acid treatment for carbon nano-tube with concentrated mixed acid, adding carbon nano-tube which is treated with acid and aniline monomer into perchloric acid water solution according to the weight ratio of 1:6-1-32, and evenly dispersing through ultrasonic processing, using ammonium persulphate as oxidation agent, controlling the molar ratio of ammonium persulphate and aniline monomer within 1:2-1:8, and reacting under the ambient temperature to obtain polyaniline nano fiber/ conductivity composite material of polyaniline coating carbon nano-tube coexisting structure. The process has simple art, and is easy to be controlled. The composite material which is prepared has the characteristics of high electricity conductivity ratio and small influence by system pH valve, large specific surface and excellent electrochemistry property and the like, which is expected to be used on electrode material such as second lithium ion cell and super capacitor and the like.

The invention discloses a slippery water fracturing fluid with ultra-low interfacial tension with crude oil after degradation. The slippery water fracturing fluid is prepared from an ultra-low interfacial tension drag reducer, a demulsify-cleanup additive, a clay stabilizer and a degrading agent. A preparation method of the slippery water fracturing fluid comprises steps as follows: 0.02%-0.10% in percentage by mass of the ultra-low interfacial tension drag reducer, 0.1%-0.2% in percentage by mass of the demulsify-cleanup additive and 0.3% in percentage by mass of the clay stabilizer are added to every ton of water, the agents are mixed to form a homogeneous solution, and 0.08% of the degradation agent is added from a mixing tank of blending equipment during construction. Additives of the slippery water fracturing fluid are all liquid phase, and the slippery water fracturing fluid can be quickly dispersed in water, have good salt tolerance, are not easily affected by the content of bacteria in a fluid preparation solution and have a stable drag reduction effect under the construction displacement of 6-20 m<3>/min; when applied to improvement of low-permeability oil and gas reservoirs, the slippery water fracturing fluid can reduce the interfacial tension between a gel breaking liquid and crude oil and reduce string and construction friction, helps production of the crude oil, increases of the yield of the crude oil and can be prepared repeatedly from backflow fracturing fluids.

The invention discloses a novel environment-friendly and nutritional efficient clarias fuscus feed and aims to provide the novel environment-friendly and nutritional efficient type clarias fuscus feed which can effectively improve the feed utilization rate of clarias fuscus, reduce the disease damages to the clarias fuscus, improve the water quality and increase the benefits. The technical scheme is that the feed is formed by the following components in mass percentage: 20-25% of flour, 6-16% of rapeseed meal, 2-6% of meat meal, 10-25% of fish meal, 4-8% of peanut meal, 5% of corn protein powder, 22-30% of bean pulp, 1-2% of cuttlefish cream, 5% of DDGS (Distillers Dried Grains with Soluble) feed, 1-2% of fish oil, 2-4% of soybean lecithin oil, 1-2.0% of monocalcium phosphate, 0.2-0.5% of compound vitamin, 1-2% of compound mineral, 0.03-0.05% of mould-proof agent, 0.1% of choline chloride and 0.2-0.4% of phytase; and the sum of all the components is 100%. The novel environment-friendly and nutritional efficient clarias fuscus feed belongs to the technical field of fish feed.

The invention relates to a waterborne polyurethane dispersion with an anion-nonionic waterborne hydrophilic group, as well as a preparation method and application thereof. The dispersion comprises the following raw materials: a, one or more polyhydroxy compounds with a number-average molecular weight of 2000-6000 g/mol, and b, one or more polyhydroxy compounds with a number-average molecular weight of 1000-5000 g/mol, wherein the number-average molecular weight of the component b is at least 1000 g/mol less than that of the component a. The waterborne polyurethane dispersion provided by the invention is high in solid content (greater than or equal to 45%) and high early-stage peeling strength, and requirements of shoe adhesive production lines can be met.

The invention discloses a method for preparing a poly-aluminum ferric silicate sulfate flocculating agent. The method comprises the following steps: reacting tetraethyl orthosilicate serving as raw material with boiling water to generate silica sol; controlling the rotating speed to be 400 revolutions per minute, adding an aluminum salt into the silica sol at the temperature of 50 DEG C, adding a ferric salt after the aluminum salt is completely dissolved, controlling the rotating speed to be 100 to 200 revolutions per minute, further stirring until the solution becomes a reddish brown transparent solution, stopping stirring, keeping in a dark place and curing for 4-6 hours, thereby obtaining the poly-aluminum ferric silicate sulfate flocculating agent. According to the amount of the aluminum salt and the ferric salt, the molar ratio of the total amount of Al and Fe to Si in the silica sol is 1:1, and the ratio of Al to Fe is 1.2-2:1. According to the preparation method, tetraethyl orthosilicate serves as a silicon source, the selectivity of the silicon source is improved, and the obtained poly-aluminum ferric silicate sulfate flocculating agent is slightly influenced by the pH value and is good in flocculating effect; the preparation method is simple in process, convenient to operate, low in requirements on reaction equipment and suitable for large-scale production.

The invention discloses a microbe-assembly-synthesis-based arsenic polluted soil restoring and fixing agent, and preparation and application methods thereof. Many iron-base materials for arsenic polluted soil restoration at present influence the structural properties of the soil due to the introduction of abundant exogenous iron, and the iron salt fixing agent can easily acidify the soil after being applied, thereby restricting the development of the soil restoring and fixing agent in the aspect of soil restoration. In order to solve the problems above, nano alpha-Fe2O3 is used as a central substance and coated by mycelial fungus hypha to prepare the restoring and fixing agent for arsenic polluted soil. When the synthesized product is proportionally and uniformly mixed with soil, after seven days, the fixing rates for water-soluble arsenic and effective-state arsenic in the arsenic polluted soil respectively reach 83.2% and 96.4%. The fixing agent has the advantages of simple preparation process, high efficiency, no toxicity or harm and no secondary pollution, is biodegradable, can not destroy the physicochemical properties of the soil, and thus, is an environment-friendly fixing agent.

The invention relates to a low temperature protease production strain, low temperature protease produced by the same and a gene of the enzyme. A strain of planococcussp. producing low temperature protease is separated from the southern Indian Ocean deep-sea sediment for the first time, the preservation number of the strain is CGMCC No.8088, the optimum growth temperature and the optimum enzyme production temperature are both 20DEG C, and the fermentation level protease yield can reach 280U/mL. The optimum operation temperature of the protease produced by the strain is 30-37DEG C, the optimum pH is 7.5-9.0, under the condition of 30DEG C, over 80% of the highest catalytic activity can be maintained, and in the range of 20-25DEG C, the protease still has high catalytic activity. The protease produced by the strain belongs to typical low temperature alkaline protease and has good catalytic activity at normal temperature, thus having high research value in food processing industry, cold water detergent development and other aspects.

The invention discloses a method for treating industrial waste water, which belongs to the technical field of environmental protection and particularly relates to a method for treating industrial waste water. The invention provides a method for treating industrial waste water, which is simple in operation and excellent in treatment effect on petrochemical waste water and ensures that the effluentis discharged after reaching standards. The invention adopts a technical scheme that: the method combines physical and chemical processes and mainly comprises pretreatment, chemical treatment and sludge dewatering and burning. The pretreatment is carried out by using a grid, a grit tank and an adjusting pond, wherein sewage first passes through the grid to remove large suspended matters, then enters the grit tank for sand setting and finally enters the adjusting pond, and at the same time, air stirring is adopted in the adjusting tank to balance water quality and prevent sludge sedimentation;the chemical treatment is carried out by a coagulating sedimentation method, namely, a aluminium polychlorid (PAC) coagulant is used to purify the waste water; and a sludge treatment system adopts concentration, dewatering and burning processes to radically treat sludge and eliminate secondary pollution.

The invention discloses a preparation method of carboxymethyl chitosan modified montrillonite. According to the method, firstly, sodium-based montrillonite is subjected to acidification treatment; then, a modifying agent of carboxymethyl chitosan is added; after the constant temperature water bath reaction, the carboxymethyl chitosan modified montrillonite is obtained. The carboxymethyl chitosan modified montrillonite prepared by the method can be used as an adsorbing agent to adsorb tetracycline; the adsorption on tetracycline is fast; the removal rate is high; the removal rate reaches 90 percent in 20min; the adsorption balance is reached in 3h; the influence by the temperature and pH value in the adsorption process is small; the application range is wide; good application prospects arerealized in the tetracycline waste water treatment.

The invention discloses a composite type sterilizing agent composition for treating industrial water. Sterilizing agents of the composite type sterilizing agent composition comprise, by weight, 50-90 parts of bromine compounds, 40-70 parts of amphoteric sterilizing agents, 1-15 parts of dispersing agents, 1-5 parts of inorganic acid, 0.5-3 parts of polymerization inhibitors, 5-10 parts of potassium hydroxide and 10-50 parts of deionized water. The composite type sterilizing agent composition has the advantages that the bromine compounds and the amphoteric sterilizing agents are compounded with one another, potential of various components can be played to the greatest extent under the synergistic effects, and accordingly requirements on microbial diversity sterilization treatment on the industrial water can be met; the sterilizing agents are low in toxicity and easy to degraded, and corrosion inhibition sterilization effects can be realized.

The invention belongs to the field of medicinal preparations, and relates to an etoposide long-circulating emulsion for injection, and a preparation method thereof. The etoposide long-circulating emulsion comprises etoposide, fluid oil, emulsifiers, polyethylene glycol (PEG) modified esters and the like, and has the characteristics of high entrapment rate, good stability and low toxicity. The etoposide long-circulating emulsion improves the solubility and the stability of etoposide, reduces irritation effects of etoposide on blood vessels, prolongs cycle time of etoposide in blood, and improves distribution of etoposide in vivo thus improves drug curative effects. The preparation method of the etoposide long-circulating emulsion solves the carrying problems of drugs with poor water-solubility and fat-solubility and realizes stable preservation and no drug precipitation. The preparation method has the characteristics of simple process, low cost and good applicability for industrializedproduction.

The invention provides a carbon dioxide recycling method. In the presence of nano nickel, a carbon dioxide source reacts with a reducing agent to obtain methanoic acid or acetic acid. Compared with the prior art, the method has the advantages that nano nickel is used as a catalyst to recycle carbon dioxide, and reaction condition is mild; catalytic selectivity is high, only methanoic acid or acetic acid is produced, and both methanoic acid and acetic acid are chemical materials and have high application value; catalysis efficiency is high, the influence of pH value on catalysis activity is small, equipment is simple, and cost is low.

The invention discloses calamine lotion with a bacteriostatic effect. The calamine lotion is prepared from the following raw materials in parts by weight: 140-160 parts of modified calamine, 45-55 parts of zinc oxide, 5-7 parts of modified nano zinc oxide, 8-10 parts of officinal phenol, 6-8 parts of antibiotic, 10-12 parts of menthol, 20-26 parts of tween 20, 7-10 parts of glycerinum, 2-3 parts of sodium carboxymethylcellulose, and 800-900 parts of purified water. The calamine lotion disclosed by the invention takes the modified calamine and the zinc oxide as main effective ingredients of thelotion, wherein the anti-bacterial, convergent, antiseptic and antipruritic effects of the both ingredients are strong; through adding a proper amount of the modified nano zinc oxide, the lotion is endowed with good antibacterial performance; the officinal phenol is capable of prolonging a using expiration date of a preparation, increasing stability of the preparation, and enhancing the sterilizing, bacteriostatic and antipruritic effects of the preparation; in addition, in a preparation process of the calamine lotion, a sodium carboxymethylcellulose suspending agent is added to increase thestability of suspension; and the calamine lotion with the bacteriostatic effect, stable characters and a strong physiological property is prepared.

The invention discloses a scale inhibition pipe and a production process thereof, wherein the production process includes the following steps: S1, taking a PP and/or PE raw material with super high molecular weight, and sintering the PP and/or PE raw material by semi-melt die pressing to form an outer sleeve filter core; S2, taking a PP and/or PE raw material with super high molecular weight, andsintering the PP and/or PE raw material by semi-melt die pressing to form an inner sleeve filter core; and S3, assembly the outer sleeve filter core and the inner sleeve filter core to form a tube body, then pouring an FOF scale inhibitor between the outer sleeve filter core and the inner sleeve filter core, and sintering by semi-melt die pressing to form the scale inhibition pipe. The scale inhibitor in the whole scale inhibition pipe is distributed more uniformly, and the scale inhibition pipe has good scale inhibition effect by slowly releasing the FOF scale inhibitor and can continuously play a role in inhibiting scale. At the same time, the FOF scale inhibitor cannot change the water quality after entering water, has little influence on the pH of raw water, and is conducive to maintaining the characteristics of raw water.

The invention discloses an efficient water treatment agent and preparing and using methods thereof. The efficient water treatment agent is prepared from, by mass, 23.6-27% of calcium oxide, 15-16% of silicon dioxide, 27.92-29.92% of aluminum oxide, 21.9-22.9% of sulfur trioxide, 1.37-1.68% of iron sesquioxide, 2.44-2.75% of magnesium oxide, 0.65-0.85% of titanium dioxide, 0.33-0.45% of potassium oxide, 0.03-0.04% of manganese oxide, 0.27-0.4% of sodium oxide and the balance water. The efficient water treatment agent is convenient to use, does no harm to the natural environment, has high flocculation force, and is hardly affected by water temperature (0-100 DEG C) and pH value.

A self-microemulsified softgel of cinnarizine for treating cerebral infarction, cerebral arteriosclerosis, cerebral trauma sequelae, etc is prepared from cannarizine, coemulsifier, emulsifier and an oil phase through proportionally mixing, and stirring while self emulsifying. Its advantage is high biological utilization rate.

The invention belongs to the fields of water treatment technology and environmental functional materials, and particularly relates to a method for preparing high-activity camellia-flower-shaped nickeloxide catalyst by a hydrothermal process and a calcination process. Reagents used in the method are nickel acetate [Ni(CH3COO)2] and glycerol (C3H8O3). The catalyst is prepared by preparing a camellia-flower-shaped beta-Ni(OH)2 precursor through the hydrothermal process and calcinating the precursor at different temperatures and under gas protection. The activation efficiency of S2O8<2-> is improved by utilizing the efficient stable camellia-flower-shaped nickel-based catalyst prepared by the method, thus further improving the reaction speed of advanced oxidation technology in alkaline organic wastewater treatment and reducing energy consumption.

The invention discloses a rapid purification and disinfection method for wastewater. The method comprises: A. adding 2-5 wt.% chlorine dioxide aqueous solution and 4-10 wt.% activator at a volume ratio of 1:1 into an activation device to obtain a mixture; B. adding the chlorine dioxide disinfection solution obtained from step A by water-jet into the flowing wastewater until 0.5-5 mg/L of chlorine dioxide in the wastewater, and maintaining no less than 15 minutes. The invention also discloses a device for the method. The method has high efficiency and good effect in rapid purification and disinfection of wastewater. The device has the advantages of simple structure, convenient manufacture and reliable performance.

The invention discloses a preparation method of a PSAF (polysilicate aluminum ferric) flocculant. Distilled water is heated to boil, a trimethylsiloxysilicate solution is added slowly and dropwise, full stirring is performed after addition, nano-silica is added, the pH is adjusted with a sodium hydroxide aqueous solution, and silica sol is obtained after heating and heat preservation; the silica sol is divided into three parts, aluminum salt is added to the first part of silica sol, stirring is performed until transparent sol is formed, and heat preservation is performed; iron salt is added to the second part of silica sol, stirring is performed until transparent reddish-brown sol is formed, and heat preservation is performed; the transparent sol is added to the transparent reddish-brown sol slowly and dropwise, heat preservation is performed after full stirring, the third part of silica sol is added, heat preservation is performed after full stirring, condensation and drying are performed, and the PSAF flocculant is obtained. Trimethylsiloxysilicate and silicon dioxide are adopted as raw materials, the raw materials are easy to obtain and low in cost, and the finally obtained PSAF flocculant is slightly affected by the pH, has a better flocculation effect and is low in cost and wider in application range.