207 results about "Acidity/alkalinity" patented technology

The invention relates to a biological preparation, in particular to a Trichodrema spp. microbial agent and a preparation method thereof. The method comprises the following steps: the dried and crushed 8-9 edible fungus chaff according to parts by weight is mixed with 2-4 auxiliary material according to parts by weight, the acidity-alkalinity pH of the mixed raw material is adjusted to 5.0-6.5, then the Trichodrema spp. suspension with 5-10 percent of mass ratio with the mixed raw material is inoculated to the mixed raw material and cultured for 7-10 days at the temperature of 8-30 DEG C, and after the Trichodrema spp. is generated, the well cultured material is dried and crushed to obtain Trichodrema spp. microbial agent. The invention takes the treated edible fungus chaff as the raw material to produce the Trichodrema spp. microbial agent, fully utilizes the rest nutritious substance in the edible fungus chaff as well as the characteristics of loose and permeability of the fungus chaff, promotes the value in use of the fungus chaff of the edible fungus, and simultaneously reduces the production cost of the Trichodrema spp. microbial agent, the produced Trichodrema spp. is mainly chlamydospore, the multiplication capacity and the colonizing capacity of the Trichodrema spp. in the microbial agent are enhanced, the capability of resisting the unfavorable environmental conditions is also enhanced and the survival time of the Trichodrema spp. is prolonged.

The invention provides a novel CO2 adsorbent and a method for preparing the same. The novel CO2 adsorbent is a mesoporous material modified by an amino group. The method for preparing the novel CO2 adsorbent comprises that: the grafting method is adopted; the pre-synthesized mesoporous material is pretreated, added to a solvent, evenly stirred at the room temperature and added with amino organosilane dropwise and stirred, and the obtained mixed solution is slowly heated up to a temperature of between 30 and 90 DEG C and kept warm for 10 and 20 hours; and after sucking filtration, the obtained solid product is activated in a vacuum oven at a temperature of between 80 and 150 DEG C for more than 10 hours. Due to the amino functional group modification on the surfaces of porous channels of the mesoporous material, the acidity-alkalinity of the surface is changed, thereby providing an adsorption activity center for the acidic gas CO2 and obviously improving the adsorption efficiency of CO2.

The invention relates to a preparation method of sulfonate amphoteric polyurethane emulsion, comprising the following steps: adding oligomer polyalcohol subject to vacuum dehydration and isocyanate into a reactor under the protection of dry nitrogen, mechanically stirring the oligomer polyalcohol and the isocyanate to react for 2h at 85-100 DEG C, reducing the system temperature to 40-60 DEG C, adding a micro-molecule chain extender, a solvent, a catalyst stannous octoate (T-9) and dibutyltin dilaurate (T-12), and maintaining the temperature to react for 2h at 55-75 DEG C; reducing the systemtemperature below 60 DEG C, and adding a positive ion chain extender and the solvent to control the temperature between 40 DEG C and 60 DEG C to react for 1h; adding the sulfonate and the solvent; adding water to carry out emulsion dispersion until the content of an isocyanate group can not change in a generated prepolymer to be reacted; and decompressing, distilling and desolventizing to obtain the sulfonate amphoteric polyurethane emulsion. The prepared sulfonate amphoteric polyurethane emulsion has a certain acidity-alkalinity resistance and can be used as an excellent carrier of a biological macromolecule and a more ideal protein model compound.

The invention discloses a soybean-based formaldehydeless adhesive used for chipboards, and an application method thereof. The soybean-based formaldehydeless adhesive is prepared from, by weight, 10-30 parts of a soybean derivative, 0.1-1 part of an acidity-alkalinity adjusting agent, 1-30 parts of a cross-linking agent, 0.1-1 part of a mildew inhibitor, 0.1-1 part of a leveling agent, 10-100 parts of water and 5-50 parts of a tackifier. Multi-component adhesive application is adopted to solve the problems of unable adhesive application of commercial soybean adhesives and too high water content of wood shavings after adhesive application, and the tackifier is used to solve the problems of poor initial viscosity of chipboards made by using the soybean adhesives, poor pre-forming property after adhesive application of wood shavings, and low static bending strength and large water absorption thickness swelling rate of boards.

The invention relates to polyaluminum ferric chloride-paper mill sludge based polymer composite flocculant and a preparation method thereof. The preparation method includes the steps that a paper mill sludge raw material is directly subjected to dissolution and crude extraction through alkali liquor so that lignin can be obtained, a cation-type paper mill sludge based polymer is prepared through graft modification to be reacted with polyaluminum ferric chloride in a mixed mode, and accordingly the novel efficient composite flocculant is prepared. When the obtained flocculant is used for treating a simulated dye water sample and the dosing quantity is 5 mg/L, the chroma removing rate of disperse yellow water samples is stabilized to be above 95%, and meanwhile a good coagulation effect is achieved on both the water samples under the different acidity-alkalinity conditions and other various water samples. The process is simple, the number of needed devices is small, industrialized production and application can be facilitated, and waste recycling is achieved; moreover, the prepared flocculant is high in flocculation efficiency and wide in application range, and a good treatment effect can be achieved on common water body pollutants.

The invention relates to polyamide-epichlorohydrin resin sticking cylinder agent, which is used for a crinkling technique in producing tissue paper. The method of the invention comprises: taking polyamine and secondary lipid as raw materials, taking water, carbinol and ethanol as dissolvant (or not adding the dissolvent), adding little amount of activator for catalyze reaction to generate polyamide prepolymer, then, reacting with the epichlorohydrin under certain acidity-alkalinity and under the condition that stabilizing agent is existed and the temperature is 60-80DEG C, generating polyamide-epichlorohydrin resin, adjusting the pH value, cooling and discharging materials, and obtaining the polyamide-epichlorohydrin resin sticking cylinder agent. The sticking cylinder agent product of the invention has stable performance and can improve the crinkling unevenness in the crinkling technique and paper cutting phenomenon in the crinkling process when in use.

The invention discloses a method for separating lithium fluoride from electrolyte acid leaching solutions, and relates to the technical field of extraction of lithium elements from aluminum electrolyte. The method comprises the following steps of S1, preparing alkali liquor for standby application; S2, adding the alkali liquor to aluminum electrolyte acid leaching solutions for neutral reaction, monitoring the fused salt acidity and fluoride concentration in the adding process, and stopping adding the alkali liquor when the PH value is larger than 6 and the fluoride concentration is lower than0.08 g/L; S3, filtering the mixed liquor, and washing and drying filter residues to obtain cryolite products; evaporating and crystallizing filter liquor, and stopping evaporating the filter liquor when the fluoride concentration is monitored to be lower than 0.02 g/L; and S4, filtering the solutions after evaporation, and washing and drying filter cakes to obtain lithium fluoride; evaporating, crystallizing, washing and drying the filter liquor to obtain inorganic salt. According to the method disclosed by the invention, the reaction process is controlled by controlling the fluoride concentration and the acidity, so that lithium ions and other ions are separated to obtain the lithium fluoride with high recovery rate; and meanwhile, cryolite and inorganic salt products with high purity are obtained.

The invention discloses a harm reducing processing method for phosphogypsum and red mud, comprising the following steps: processing acidity-alkalinity analysis to the phosphogypsum and red mud at first, then mixing the phosphogypsum and red mud to 1.0 to 1.0 according to the molar ratio of H<+> and OH<-> based on the alkali content of the phosphogypsum and red mud, and then stacking the mixture of phosphogypsum and red mud after being stirred uniformly. By resolving the long-period unresolved major problem for enterprises, the harm reducing processing method for phosphogypsum and red mud has the advantages of less investment, quick returns and important contribution to the environmental protection.

The invention discloses a preparation method of ultrahigh-purity niobium oxide. The preparation method comprises the steps of acidity regulation, extraction separation, neutralization, precipitation, drying and calcining by taking a fluoroniobic acid solution as a raw material. In the extraction separation step, sec-octyl alcohol is used for extracting the regulated niflumic acid material liquid to obtain an organic phase; subsequently the organic phase is pickled by a pickling agent; finally the pickled organic phase is re-extracted by an anti-niobium agent to obtain the ultrahigh-purity niobium oxide. The invention also provides the ultrahigh-purity niobium oxide prepared by the method; the percentage composition of Nb2O5 is larger than or equal to 99.995%; the content of each impurity satisfies the regulations of the standard YS/T548-2007 on product grades F Nb2O5-048 and F Nb2O5-045.

The invention provides novel acid generators which are unproblematic in combustibility and accumulation inside the human body and can generate acids having high acidities and high boiling points and exhibiting properly short diffusion lengths in resist coating films and which permit the formation of resist patterns excellent smoothness with little dependence on the denseness of a mask pattern; sulfonic acids generated from the acid generators; sulfonyl halides useful as raw material in the synthesis of the acid generators; and radiation-sensitive resin compositions containing the acid generators. The acid generators have structures represented by the general formula (I),

wherein R¹ is a monovalent substituent such as alkoxycarbonyl, alkylsulfonyl, or alkoxysulfonyl, R² to R⁴ are each hydrogen or alkyl; k is an integer of 0 or above; and n is an integer of 0 to 5. Among the radiation-sensitive resin compositions, a positive one contains a resin having acid-dissociable groups in addition to the above acid generator, while a negative one contains an alkali-soluble resin and a crosslinking agent in addition to the acid generator.

A method for determining vanadium content in a tungsten matrix with singly added vanadium or simultaneously added chromium and vanadium, characterized in that a test sample is subjected to alkaline melting with sodium peroxide and water leaching followed by dry filtering, the chromium and vanadium in the filtrate are firstly reduced to low valences by a reducing agent, i.e. hydroxylamine hydrochloride, then the filtrate is adjusted to an acidity of 4-6 M with nitric acid, the vanadium is oxidized in a cold state to a high valence by potassium permanganate, and the high-valent vanadium forms a ternary complex with tungstate and orthophosphate, the darkness of the color of the ternary complex is directly proportional to the vanadium content, thus the vanadium content is determined colorimetrically, and the interference of chromium is eliminated with the fact that the potassium permanganate in a cold state in the acidic condition for vanadium determination oxidizes the vanadium but not the chromium. The method of the invention is relatively suitable for determining the macro-amount vanadium content in a tungsten matrix containing macro-amount vanadium singly or containing macro-amount vanadium and chromium simultaneously, the method is fast and accurate with a relative error less than 5%, which can fully satisfy the requirements of the production process for the determination.

The invention discloses an eggplant seedling growing matrix, and belongs to the technical field of soilless culture. The matrix comprises 400-550dm<3>/m<3> of coconut chaff, 150-300dm<3>/m<3> of peat, 100-150dm<3>/m<3> of wood chip, 200-300dm<3>/m<3> of vinegar chaff, 50-75dm<3>/m<3> of perlite, 60-75dm<3>/m<3> of vermiculite, 10-20dm<3>/m<3> of a decomposed fermented material, and a small amount of an organic fertilizer, and the organic fertilizer comprises 0.1-0.3kg/m<3> of peptone, 0.1-0.2kg/m<3> of an organic potash fertilizer and 0.1-0.2kg/m<3> of an organic phosphate fertilizer. The matrix adopts the coconut chaff as a main body matrix material, and also comprises the peat, wood chip, vinegar chaff, perlite, vermiculite and the decomposed fermented material according to different proportions, so the acidity-alkalinity of the matrix is effectively balanced, and abundant and sufficient nutrient environment is provided; and the matrix has the advantages of loosening, ventilation, water retention, fertilizer conservation, environmental protection and low cost.

The invention discloses a method for drawing a steel wire. The method comprises the following steps in turn: a) immersing the steel wire into a phosphating tank which has tonnage of between 15 and 25, free acidity of between 10 and 14 and total acidity of between 80 and 120; b) performing acid-washing and phosphating for 2 to 3 hours; c) primarily drawing the steel wire with diameter of 5.5mm to be 2.8mm by using a water tank drawing vehicle with roller diameter of 650mm; and finally d) secondarily drawing the steel wire to be 1.3mm by using the water tank drawing vehicle with roller diameter of 450mm. In the method for drawing the steel wire of the invention, by adjusting the size of the phosphating tank and the concentration of phosphoric acid, the steel wire with diameter of 5.5mm is drawn to be the steel wire with diameter of 1.3mm by using the water tank drawing vehicles with different sizes, so that the thermal treatment and second acid washing are saved, the process is simplified, and the cost is reduced.

Piglet early-stage care feed is disclosed. Raw materials include corn, puffed corn, soybean meal, fermented soybean meal, bran, puffed soybean, soybean oil, sugar, glucose, fish meal, amino acids, organic trace elements, inorganic trace elements, choline chloride, betaine, sodium chloride, calcium carbonate, calcium hydrophosphate, composite vitamins, composite enzymes, phytase resistant to high temperature, quinocetone, calcium oxytetracycline, 4-6 parts of an acidifying agent and kitasamycin. The acidifying agent is used in the feed to adjust acidity-alkalinity balance in intestinal tracts. Antibiotics are combined to resist intestinal bacteria. The feed can also improve the digestion rate and piglet immunity. An amino acid composition is adopted to improve immunologic balance of piglets. An organic trace element composition and zinc oxide are used to improve body immunity and intestinal health of the piglets. A composition of the white sugar, the glucose, monosodium glutamate, and the like is adopted to improve immunity and palatability. Beneficial effects of the method are that palatability is improved, the feed intake is obviously increased, intestinal tract stress is reduced, the diarrhea rate is reduced by about 20%, and the survival rate is increased by about 30%.