49results about How to "Does not change pH" patented technology

The invention discloses a method for modifying natural zeolite powder, which uses an inorganic alkali and sodium chloride as modification medicaments to modify the natural zeolite powder by a solution soaking method. The method comprises the following steps: firstly, mixing the natural zeolite powder and the sodium chloride, soaking the mixture in sodium hydroxide solution for an adsorption reaction, washing the product of the absorption reaction with water till the pH value of the product is neutral after the reaction is finished; and secondly, drying the product of the absorption reaction to obtain modified zeolite powder. The modification method of the invention avoids the use of organic acids and the production of toxic and harmful substances, effectively prevents low-concentration ammonian pollution of the raw water of drinking water without changing the prior drinking water treatment process, does not change the pH value of the raw water after being used, does not exert influence on the subsequent processes, and improves the ammonian adsorption performance of the modified zeolite powder by 30 to 80 percent.

The invention relates to a degradable and nontoxic medical polyurethane material and a preparation method thereof, belonging to the technial field of biomedical high polymer materials. Raw materials thereof adopt poly (epsilon-caprolactone) dibastic alcohol (PCL) as a soft segment and L-lysine ethyl ester diisocyanate (LDI-E) or L-lysine methyl ester diisocyanate (LDI-M) and chain extender L-lysine ethyl ester (Lysine-E) or L-lysine methyl ester (Lysine-M) as a hard segment, wherein the number-average molecular weight of the poly (epsilon-caprolactone) dibastic alcohol ranges from 500 to 5000.The polyurethane of the invention is degradable, and degradation products thereof are harmless to human bodies; as a great amount of carbamido is contained in the polyurethane, the mechanical property and the degradation property of the polyurethane are improved; and the degradation products are completely nontoxic, the degradation product of lysine can neutralize 6- hydroxyl hexanoic acid generated by soft segment degradation, the pH value of adjacent tissues can not be changed, and therefore the polyurethane prepared by the invention has favorable biocompatibility.

The invention discloses a stabilization restoration method for soil compositely polluted by arsenic, antimony and other heavy metals. The method comprises the following steps that (1) bentonite and/or crop-residue-derived carbon are/is added into the heavy-metal-compositely-polluted soil and stirred evenly; (2) water is added into the soil, the moisture content of the soil is made to be 20%, and a stirring reaction is conducted for 0.5-2 h; (3) a certain amount of arsenic-antimony-polluted soil stabilizer is added and stirred evenly, water is added then, the moisture content of the soil is made to be 30%-50%, and even stirring is conducted; and (4) the soil where the stabilizer is added is cured for 3-30 d, and the purpose of soil restoration is achieved. A stabilizing material adopted by the method has the characteristics of being economical, effective, extensive in source, low in cost, high in stability, free of secondary pollution to soil, neutral, no change in polluted soil pH value and the like, the operation method is simple, high in practicability and wide in application range, and the method has the good stabilization restoration effect on the heavy-metal-compositely-polluted soil, especially on the soil compositely polluted by heavy metals of arsenic and antimony.

The present invention discloses a carbon-based sludge composite regulating and dehydrating agent based on sludge incineration. The carbon-based sludge composite regulating and dehydrating agent comprises a carbon-based framework construct and a small amount of an assistant agent, wherein the addition amount of the carbon-based framework construct is 1-5% of the weight of the sludge, the addition amount of the assistant agent is 0.03-1.0% of the weight of the sludge, and the carbon-based framework construct is a material selected from wood chips, biological straws, brown coal and coal gangue, or a mixture comprising any materials selected from wood chips, biological straws, brown coal and coal gangue. According to the present invention, with the used carbon-based framework construct and the assistant agent, the electrostatic repulsion effect and the hydration effect between the sludge particles can be reduced; the porous granular structure of the carbon-based sludge composite regulating and dehydrating agent can absorb the partial sludge to form the penetrative and solid lattice structure, such that the permeability of the filter cake during the mechanical dehydration process is ensured, and the dehydration speed during the filtering stage and the compressing stage is improved; with the formed homogeneous framework, the water content of the compressed mud cake is uniform, and the compressed mud cake has good homogeneity; the carbon-based sludge composite regulating and dehydrating agent of the present invention has characteristics of less addition amount, good sludge filtering performance, high dehydration efficiency, high solid content of the mud cake, and the like; the components of the carbon-based sludge composite regulating and dehydrating agent comprise the carbon-based material, such that the heat value of the mud cake is improved so as to easily perform the follow-up cake incineration treatment.

A process for extracting the active polyphenol substances from the natural plants includes such steps as washing, drying, pulverizing, loading it along with the deoxidizing purified water in an extractor, heating at 50-90 deg.C under the protection of inertial gas while stirring for 30-60 min in order to extract the active components or ultrasonic or microwave extracting for 10-40 min 1-5 times, collecting liquid extract, filtering, cooling concentrating and drying.

The invention provides a method for adding CO2 and O2 in-ground leaching in heavy carbonic acid type ground water and leachate, which comprises the following steps: (1) adding CO2 and O2 into the leaching solution to leach uranium underground to obtain uranium leachate; (2) adding uranium to the uranium Add CO2 to the leaching solution to adjust the pH value of the uranium leaching solution, and then filter it mechanically; (3) perform ion exchange adsorption on the uranium leaching solution in the adsorption tower; (4) perform leaching on the saturated resin to obtain Cl-type poor resin and leaching qualified solution (5) transforming the Cl-type poor resin with the adsorption tail liquid; (6) acidifying the eluting qualified liquid, adding alkali and aging precipitation at room temperature, washing, filtering and drying the precipitated slurry to obtain uranium products. The method of the invention only adds O2 and CO2 without adding other reagents, which will not cause blockage of ore beds and pollution of underground water; at the same time, the preparation process is integrated, the operation is simplified, and the cost is saved.

The invention discloses a liquid synthetic method of pasireotide pentapeptide intermediate, i.e., a preparation method of H-Phg-D-Trp-Lys(Boc)-Tyr(Bzl)-Phe-OR. By using the liquid linker peptide synthetic method, reaction is easy to detect, the cost is lower than that of a solid synthetic method, and the method is more suitable for large-scale industrial production. The liquid synthetic method includes the main synthetic steps of linking carbobenzoxy-protected D-tryptophan and 9-fluorenylmethoxycarbonyl-protected phenylglycine one by one to Alpha-N terminals of lysine to obtain a tripeptide fragment in 3+2 mode through BSA protected lysine and N-hydroxysuccinimide ester method; condensing ester-protected phenylalanine and t-butyloxycarboryl-protected O-benzyl-tyrosine to obtain a dipeptide fragment through N-hydroxysuccinimide ester method; condensing the tripeptide and dipeptide through TBTU method to obtain the target product, pasireotide pentapeptide intermediate.

The invention discloses an injection-type high-strength degradable porous magnesium phosphate bone repairing material. The material includes a solid phase, a liquid phase and a pore forming agent, wherein the solid phase is formed by mixing sintered magnesium oxide, hydrophosphate, calcium phosphate and a retarder; the liquid phase is water-soluble chitosan liquid; the pore-forming agent is formedby mixing mannitol crystals and sodium alginate, wherein the addition amount of the pore forming agent is 10-30% of the mass of the solid phase, and the ratio of the total mass of the pore forming agent and solid phase to the mass of the liquid phase is 0.5-2 g/ml. According to the obtained porous magnesium phosphate bone repairing material, on the basis of introducing a porous structure into a magnesium phosphate bone repairing material system, excellent mechanical performance is ensured; moreover, the material has excellent injectable performance, degradable performance and biocompatibility, less heat is centrally released to the periphery, stable growth of bone repairing cells is facilitated, and the bone repairing material has a significant application and popularization value.

The invention provides a method for realizing graphene oxide dimension separation by icing and solidification, and belongs to the technical field of nano-material processing technology. The method controls icing and solidification speed of graphene oxide aqueous dispersion, in order to realize separation of graphene oxide of different dimensions. Because diffusion speeds of graphene oxide of different dimensions are different, densities of oxygen-containing function groups are different, so that mutual combination capabilities between graphene oxide and ice crystal are different, smaller graphene oxide has fast diffusion speed, density of oxygen-containing function group is high, and the smaller graphene oxide can rapidly combine with ice crystal; on the contrary, larger graphene oxide hasrapid diffusion speed, density of oxygen-containing function group is low, and the larger graphene oxide has weaker combination capability with ice crystal. Speeds of icing and solidification are controlled, so that graphene oxide with required dimension and redox distribution can be accurately separated.

The invention discloses a method for removing toxic heavy metals in water with modified nanometer titanium dioxide particles. In the prior art, toxic heavy metals are removed by adding considerable basic materials, which results in waste of materials and increased cost in treating waste water. In the invention, modified nanometer titanium dioxide particles are added into and fully mixed with contaminated water, and the mixture is deposited to precipitate modified nanometer titanium dioxide particles which have absorbed toxic heavy metals; the precipitated modified nanometer titanium dioxide particles containing the toxic heavy metals are transferred to a recovery pond, and a dilute acid solution is added into the recovery pond to recover the toxic heavy metals desorbed from the modified nanometer titanium dioxide particles. The invention enables high efficient removal of high density toxic heavy metals in waste water on one hand and substantial reduction of the collecting volume of treating materials on the other hand and especially enables the usage of strong acid and strong base to be avoided, substantially saving cost.

The invention belongs to the field of oilfield chemistry, and particularly relates to a thermal-resistance and salt-tolerance dispersed gel nitrogen foam composite profile control system. The thermal-resistance and salt-tolerance dispersed gel nitrogen foam composite profile control system comprises a gas phase and a liquid phase, wherein the gas phase is nitrogen, and the liquid phase comprises a foaming agent, a foam stabilizer and a liquid dosing water and the balance of water; the mass fraction of the foaming agent in the total mass of the liquid phase is 0.1% to 0.4%, the mass fraction of the foam stabilizer in the total mass of the liquid phase is 0.05% to 0.15%, and the sum of the mass fractions of the components is 100%; and the gas-liquid ratio of the gas phase to the liquid phase is controlled to be 3-5: 1. An adopted nanoscale or micron-sized dispersed gel has good foaming and foam stabilizing synergistic effect with a betaine ampholytic surfactant, the swept volume and displacement efficiency of the foam composite profile control system are improved to the maximum extent, the system can be resistant to the temperature of 130 DEG C, the total salinity of 17*104 mg/L, the calcium ions of 1.0*104 mg/L and the magnesium ions of 1.0*104 mg/L, and the profile control effect of a high temperature and high salt oil deposit can be improved to the maximum extent.

The invention relates to application of thiourea-formaldehyde resin in inhibition of urease in soil. Thiourea resin is added into soil as a novel urease inhibitor to inhibit the activity of urease inthe soil. The adding amount of the thiourea-formaldehyde resin is 10-50g per kilogram of soil. As a novel urease inhibitor, thiourea resin scrambles for ligands to reduce the urease activity, the inhibition mechanism is clear, and the urease activity can be effectively inhibited. The invention opens up a new application field of thiourea resin in inhibition of urease, and the inhibition activity is superior to that of the recognized urease inhibitor NBPT. The thiourea-formaldehyde resin has rich sources of synthesis raw materials, the price is low, also the adding amount of the thiourea-formaldehyde resin is small, and the effect is stable after the thiourea-formaldehyde resin is applied to soil. Along with the increase of the dosage, the inhibition effect is greatly improved. And the adding of the thiourea-formaldehyde resin does not change the pH value of the soil, and has little influence on the physicochemical properties of the soil.

The invention provides a disinfection effervescent tablet with a water quality purification effect. The disinfection effervescent tablet comprises, by mass, 8-12% of povidone iodine, 20-40% of tartaric acid, 15-30% of sodium bicarbonate, 1-5% of disintegrating agents, 0.1-5% of microcrystalline cellulose, 0.1-1% of dextrin, 2-8% of polyethylene glycol 6000, 0.01-1% of talcum powder, 0.1-5% of laurinol magnesium sulfate, 0.1-2% of polymeric flocculant, 5-10% of polymeric coagulant and the balance filler. The invention further provides a preparation method of the disinfection effervescent tablet with the water quality purification effect. By means of the effervescence technology, povidone iodine and flocculant are combined together, the disinfection effervescent tablet can be more uniformly dissolved in a water body, and the optimal disinfection and water body purification effects are achieved. The effervescent tablet can be basically completely disintegrated and uniformly dispersed within 5 min. The preparation method is easy and convenient to operate and simple in device requirement. The product is convenient to use, transport and carry. Meanwhile, the pH value of the water body can not be changed, the ecological balance of the water body can not be damaged, and the disinfection effervescent tablet and the preparation method are suitable for industrialized large-scale production, application and popularization.

The invention belongs to the technical field of agricultural planting, and specifically relates to a water-retaining planting method for Millettia specisoa Champ in a sloping land. The water-retainingplanting method comprises the following steps: (1) preparationof the sloping land; (2) seedling raising and transplanting; and (3) water and nutrient management. The water-retaining planting method provided by the invention has the following steps: biomass charcoal and a water-retaining fertilizer are spread onto the sloping land during ploughing and buried into soil after ploughing, have good water-retaining effect, can rapidly absorb and slowly release water, realize water retention for the sloping land, and have good water-retaining effect, so the Millettia specisoa Champ can vigorously grow on the sloping land, and the yield of the Millettia specisoa Champ on the sloping land is increased.

The invention relates to a paddy field special herbicide and a preparation method thereof. The paddy field special herbicide is composed of the following raw material components in parts by weight: 3-5 parts of borax, 10-15 parts of acetochlor, 2-4 parts of sodium hexametaphosphate, 2-3 parts of sodium caseinate, 3-5 parts of atrazine, 4-6 parts of epoxy soybean oil, 4-5 parts of polyacrylamide, 3-4 parts of BHT, 2-5 parts of stearic amide, 30-40 parts of ethanol, and 10-15 parts of deionized water. The paddy field special herbicide has the advantages of easily obtained materials, simple method, low cost, low-toxicity and broad-spectrum pesticide, nonirritant odor, good effect of weeding, no harm to rice roots, wide application range and high comprehensive economic benefits, and effectively removes weeds from stems and leaves to roots.

The invention relates to a device for enhancing the medicine curative effect by an amplitude modulation electric field. The device comprises a power supply, a central control unit, a frequency modulation signal generating unit, an amplitude modulation unit, a power amplification unit, an output distribution unit, an insulation electrode and an insulation electrode positioning system, wherein under the control of the central control unit, the frequency modulation signal generating unit generates a required frequency signal; the required frequency signal is modulated by the amplitude modulation unit to generate a square wave form amplitude modulation signal; the square wave from amplitude modulation signal is amplified by the power amplification unit and is then allocated onto one than one pair of insulation electrodes by the output distribution unit, so that an amplitude modulation electric field with the continuous weakness serious sudden change is generated between more than one pair of insulation electrodes. The amplitude modulation electric field with the continuous weakness serious sudden change is applied onto cells; cell membrane generates depolarization and repolarization, so that the membrane permeability reversibility is improved; the quantity of the medicine passing through the cell membranes is increased; the curative effect is enhanced.

The invention discloses a production method of long-acting ammonium phosphate salt slow release fertilizer granules. The production method is characterized in that a phosphorous material, a magnesian material, a calcareous material, ammonia water and the like react to generate MgNH4PO4.xH2O and CaNH4PO4.xH2O which are insoluble in water but soluble in acid; acid rain contains a trace amount of acid radical ions such as sulfate ions and nitrate ions, which can be slowly dissolved MgNH4PO4.xH2O and CaNH4PO4.xH2O and corrode crop waste particles in the granules; various absorbable nutritional elements such as N, P, K, Ca, Mg, C and H are provided for plant growth for a long time; harmful ions in the acid rain are consumed; a beneficial way is provided for recycling of crop wastes.

The invention specifically relates to a preparation process of cottonseed proteins, in particular to a process for producing high-purity cottonseed proteins through low-protein cottonseed meal. Cottonseed hulls and cotton velvet in conventional cottonseed meal can be completely separated, the removal rate of the cottonseed hulls reaches 98%, the removal rate of the cotton velvet reaches 96%, the ordinary cottonseed meal is converted into the cottonseed proteins, the content of the cottonseed proteins can reach 60% or above, and the cottonseed proteins can be applied to aquatic feed to replacefish meal. Part of the cottonseed proteins are taken away from generated products, namely the cottonseed hulls, in the screening process of a grading screen, thus the cottonseed hulls contain 10-14% of the cottonseed proteins, and the cottonseed hulls are rich in organic matter and nutrition, have quite high application value, are applied to the field of mushroom cultivation, and can also serve ashigh-protein feed for cattle and sheep. The preparation process can be suitable for industrial large-scale continuous production, the whole product production process is at the normal temperature, chemical extraction is not involved, the activity of original cottonseed proteins is not damaged, and the content of proteins in the conventional cottonseed meal (the content of the cottonseed proteinsis 40%-45%) is increased to 60% or above.

The invention belongs to the technical field of sewage treatment, and discloses an acetic acid-magnesium acetate liquid carbon source as well as a production process and application thereof. The production process comprises the following steps: (1) reacting light calcined magnesia powder with an acetic acid solution for 2-3 hours at the temperature of 40 +/-5 DEG C and normal pressure to obtain amixture with the pH value of 4.5-6.0; 2) carrying out filter pressing on the mixture, and carrying out backwashing and air drying to obtain a filtrate, backwashing water and filter residues; and 3) mixing part of the backwashing water with the filtrate to obtain the acetic acid-magnesium acetate liquid carbon source with the pH value of 4.5-6.0. The liquid carbon source for sewage treatment prepared by the invention has the advantages of high effective content, low production cost, less salt brought into water, a liquid product is not easy to crystallize at low temperature and does not changethe pH value of water.

The invention provides an oak plant root-promoting microbial microcapsule inoculant and a preparation method thereof. The active ingredients of the microbial microcapsule inoculant are rhizobium radiobacter, bacillus megaterium, bacillus marinus and paenibacillus mucilaginosus, and the microbial microcapsule inoculant is long in normal-temperature storage time and high in thallus survival rate andcan promote growth of roots and tips of oak plants; the microbial microcapsule inoculant is prepared by adopting a spray drying technology, and the production process is reasonable in design, so thatthe cleanliness and sterility of the inoculant are guaranteed.

The invention discloses wood vinegar which comprises the following components in parts by weight: 150-300 parts of amino acid, 350-1000 parts of acetic acid, 50-120 parts of fulvic acid, 0.05-0.2 partof dihydric phosphate, 12-20 parts of borate and 800-1200 parts of water, wherein the amino acid comprises one or more of aspartic acid, threonine, serine, glutamic acid, glycine, alanine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, lysine, arginine and proline; cation in the dihydric phosphate, the borate and nitrate is one or more of copper ions, iron ions, manganese ions, zinc ions, molybdenum ions, calcium ions and magnesium ions. The wood vinegar has the beneficial effects that crop yields can be increased, crop quality can be improved, soil canbe beneficially affected, heavy metal over-standard is avoided, and a certain prevention and treatment function is achieved for diseases and insects of crops.

The invention relates to a preparation method of a biodegradable polyurethane acrylate carrier released by coating medicine. The preparation method includes the process that poly(ether-ester) diols is synthesized, a polyurethane acrylate coating is prepared, and medicine loading is performed. The preparation method has the advantages that by means of a molecular design method, a poly(ether-ester) soft segment is introduced in a polyurethane acrylate main chain, the hydrophilicity of the coating can be effectively improved and the degradation rate of the coating can be effectively increased; the polyurethane acrylate coating is obtained through an ultraviolet curing method, and time and labor are saved; after the coating loaded with antibiotics, the antibacterial effect is achieved, the coating is biodegradable, and degradation products of the coating are non-toxic, and it is avoided that pH of the system is changed and inflammation is caused.