36 results about "Alkalization - Treatment" patented technology

The invention discloses a preparation method and application of a loofah sponge biomorphic supported nitrogen-doped carbon nanotube coated iron nanoparticle Fenton-like catalyst, relates to a preparation method and application of a Fenton-like catalyst, and aims to solve the problems of easy agglomeration of active components, ion leaching, slow Fe < 3 + > / Fe < 2 + > conversion under a neutral condition and poor cycling stability of the existing Fenton-like catalyst. The method comprises the following steps: 1, preparing dried loofah sponge with the particle size of 8-10mm; 2, alkalization treatment; 3, precipitating Fe < 3 + > on the surface of the loofah sponge; 4, doping a nitrogen source; 5, carrying out pyrolysis; 6, cleaning and drying. The loofah sponge biomorphic supported nitrogen-doped carbon nanotube coated iron nanoparticle Fenton-like catalyst is used for degrading tetracycline hydrochloride in sewage. The method is suitable for degrading antibiotics.

The invention belongs to the technical field of radioactive waste treatment, and particularly relates to a method for extracting and preparing nuclear-grade ThO2 powder from rare earth waste residues.The method is used for alkalization treatment of the rare earth waste residues, not only can realize preliminary separation of thorium elements and part of impurity elements, but also can effectivelysolve the problem of equipment corrosion, meanwhile, the generated thorium hydroxide is easily converted into a thorium nitrate solution, and the next extractive purification process is carried out.According to the method, the thorium nitrate is extracted and purified by adopting a centrifugal extraction technology, the method has the characteristics of high recovery rate, continuous operation,low energy consumption and the like, the thorium elements are efficiently separated from other rare earth elements, and therefore the method has important significance in extracting and preparing nuclear-grade ThO2 powder from the rare earth waste residues.

The preparation method comprises the following steps: S1, dissolving an ampicillin sodium crude product in deionized water, and adding a proper amount of alkali liquor to adjust the pH value of the solution to 6.7-6.9; s2, adding a magnetic nanotube into the alkalized solution, and stirring and adsorbing in a vacuum environment; s3, separating the magnetic nanotubes by using a magnetic field, and dispersing the magnetic nanotubes into deionized water for oscillation desorption; wherein the magnetic nanotube comprises a multi-layer structure, and the multi-layer structure sequentially comprises a compact silicon dioxide nanotube layer, a Fe3O4 layer and a mesoporous silicon dioxide layer from inside to outside; and S4, merging and crystallizing the ampicillin sodium solution obtained by oscillation desorption to obtain refined ampicillin sodium. The ampicillin sodium molecules are reversibly adsorbed by adopting the special structure of the magnetic nanotube in a weak acid environment, and the inner layer of the silicon dioxide nanotube and the outer layer of the mesoporous silicon dioxide layer can be subjected to physical adsorption reaction with the ampicillin sodium molecules through hydrogen bonds, surface atomic coordination and the like.

The invention discloses a method for high-temperature alkalization treatment of solid hazardous waste and co-treatment in a cement kiln. In the pretreatment process of the solid or plastic or slurry hazardous waste, a modification treatment agent is added for modification treatment to serve as a substitute raw material for cement production, and the modified solid hazardous waste is fed into a discharging pipeline at the conical part of a C5 or C6 preheater for high-temperature alkalization and enters a rotary kiln for high-temperature calcination to form clinker minerals. The method is easy to operate, low in investment, low in treatment energy consumption, low in treatment cost and free of secondary pollution. According to the invention, organic matters in the solid hazardous wastes canbe effectively burnt out, silicon-aluminum / calcium inorganic minerals in the solid hazardous wastes are converted into mineral components of the cement clinker, heavy metal and most of alkali are fused through silicon-aluminum root group / silicate group / aluminate group lattices, fluorine, chlorine and sulfur are converted into early-strength calcium fluoroaluminate, calcium chloroaluminate and calcium sulphoaluminate clinker minerals, accumulated materials of a kiln tail smoke chamber are prevented from being stuck and blocked, and cost reduction and efficiency improvement are facilitated.

The invention belongs to the technical field of gas-humidity sensitive sensors and relates to a planar humidity-ammonia gas sensor based on alkalized organ-like MXene (Ti3C2Tx, with T representing surface basic group terminals and x valuing from a ratio of surface terminals) sensitive material and preparation method thereof. The planar humidity-ammonia gas sensor is composed of an Al2O3 ceramic base plate with an Au / Ni interdigital electrode and an alkalized organ-like MXene (Ti3C2Tx) sensitive material applied evenly to the interdigital electrode and the ceramic base plate by dripping. Basedon the organ-like MXene material, surface F terminals are removed and sodium ions are inserted by alkalizing the organ-like MXene material. pre-alkalization and post-alkalization gas-humidity sensitivities are compared to obtain a device having better humidity and ammonia gas sensitivities. The sensor prepared herein has MXene gas-humidity sensitive response which is the highest up to now, and hasgood selectivity.

The invention belongs to nuclear fuel circulation technologies, and specifically discloses a uranium-containing wastewater treatment method. The treatment method is characterized in that firstly uranium-containing wastewater is subjected to pre-filtration, and followed by acidification treatment and alkalization treatment; and after being filtered again, the wastewater is subjected to silica gel adsorption uranium removing, after the wastewater reaches standards, deep treatment is performed, and if the wastewater does not reach the standards, deep treatment is performed after silica gel desorption. According to the treatment method, particulate matters in the wastewater are removed through pre-filtration firstly, thereby avoiding high temperature acidification making the uranium concentration of the wastewater increased to bring critical safety problems; with the help of the high temperature acidification, acid gases are driven off, and organic matters are destroyed, thereby avoiding affecting the adsorption of the silica gel on uranium; after the acidification, ammonia water, sodium hydroxide or the like is added to precipitate most of the uranium in the wastewater, thereby reducing the uranium concentration in the wastewater, and the precipitated wastewater is subjected to two stage filtration to make most of uranium-containing particles intercepted, thereby avoiding the uranium-containing particles polluting the silica gel, and improving the service life and the adsorption effect of the silica gel.

The invention discloses a process for inhibiting the activity of xanthine oxidase in vitro by using an alkalized catechin monomer, and belongs to the technical field of catechins, and the process comprises the following steps: S1, preparing materials: preparing a sodium pyrophosphate buffer solution with the pH value of 7.5, and preparing a xanthine oxidase mother solution, a xanthine solution and a catechin monomer diluent for later use; s2, alkalizing catechin monomers: adding an alkaline solution into the catechin monomer diluent, and reacting in a water bath kettle at 35 DEG C for 30 minutes to obtain alkalized catechin monomers; s3, taking a mixture of the xanthine oxidase solution, the xanthine solution and the buffer solution as a solvent I, mixing the solvent I with the alkalized catechin monomer by adopting a compatible solvent method, and reacting in a water bath kettle at 35 DEG C for 30 minutes, so as to inhibit the activity of the xanthine oxidase in vitro; the catechin monomers are subjected to alkalization treatment, so that the alkalized catechin monomers have an inhibition effect on the activity of xanthine oxidase.

The invention relates to an oil-based fluid loss additive for drilling fluid and a preparation method thereof. Under the nitrogen gas protection, NaOH solution, organic solvents and refining cotton are sequentially added into a reaction kettle; alkalization treatment is performed for 1 to 2h at 20 to 25 DEG C; chloroactic acid is added; the temperature is raised to 50 to 80 DEG C; after the reaction for 1 to 2h, the pH value is regulated to 4 to 6 by glacial acetic acid; organic amine is added; the temperature is raised to 140 to 180 DEG C; after the reaction for 1 to 2h, materials are discharged to obtain the oil-based fluid loss additive for drilling fluid. The oil-based fluid loss additive for drilling fluid can be applied to diesel oil, white oil and synthetic drilling fluid system; the product achieves the environment-friendly effects; the fluid loss reduction effect is obvious; the preparation method and the required equipment conditions are simple; the implementation is easy.

The invention discloses a recycling method of levorotation camphorsulfonic acid serving as a clopidogrel resolving agent, which belongs to the technical field of fine chemistry industry. The method comprises the following steps of: 1) adding clopidogrel camphorsulfonate into a certain amount of ethyl acetate and water mixed solution, mixing fully and uniformly, and performing alkaline treatment with saturated inorganic salt solution; 2) acidifying a water layer with strong acid, concentrating and evaporating to dryness to obtain a solid, adding an organic solvent, heating until concentrated solution is dissolved, and filtering to remote inorganic salt; and 3) cooling and crystallizing filtrate for 5 to 12 hours and performing suction filtration to obtain the levorotation camphorsulfonic acid. The method has a simple recycling process and short time. Further resolution indicates that an obtained product has high optical purity, recovery ratio of over 89 percent, low production cost anda good economic benefit, is easy to operate, is nontoxic and environmentally-friendly, and is suitable for mass industrial production.

The invention discloses a processing method for recycling S-(-)-lipoic acid, which comprises the following steps: (1) dissolving S-(-)-lipoic acid in an organic solvent, and then adding alkali for alkalization treatment, Obtain S-(-)-lipoic acid reaction solution; (2) carry out aeration treatment with described S-(-)-lipoic acid reaction solution, then carry out acidification treatment to obtain yellow paste; (3) described yellow The paste is dissolved in an organic solvent, and after adding thionyl chloride for chlorination reaction, adding ethanol to continue the esterification reaction to obtain ethyl 6,8-dichlorooctanoate. The present invention realizes the recycling of S-(-)-lipoic acid, obtains the raw material 6,8 dichlorooctanoic acid ethyl ester for the synthesis of α-lipoic acid, not only solves the recycling problem of S-(-)-lipoic acid, Material waste is avoided, and the cost of raw materials for synthesizing R-lipoic acid is greatly reduced, which provides a new way for industrial production of R-lipoic acid.

The invention relates to the field of environmental protection, in particular to a treatment method of arsenic-fluorine-containing industrial wastewater. The method includes acidification treatment, medicament addition, alkalization treatment and settling separation; the invention provides a treatment method of the arsenic-fluorine-containing industrial wastewater. The modified reinforced diatomite is applied to a treatment process of arsenic- fluorine-containing industrial wastewater; in the wastewater treatment process, only a wastewater treatment agent is added after the wastewater is acidified; the modified reinforced diatomite provided by the invention is applicable to treatment of industrial wastewater with medium and low contents of arsenic and fluorine; optimal process conditions such as the addition amount or the treatment flow of a medicament are provided, and a treatment process which is innovative, low in investment, low in cost and easy to manage and protect is provided for treatment of the arsenic-fluorine-containing industrial wastewater; the method has the advantages of simple and easily available raw materials, low cost and simple wastewater treatment process.

The invention discloses a method and a system for treating red mud. The method for treating the red mud comprises the following steps: drying water-containing red mud to obtain dry red mud; finely grinding the dry red mud to obtain superfine red mud powder; carrying out pre-reduction de-alkalization treatment on the superfine red mud powder in a fluidized bed under the reducing atmosphere to obtain de-alkalized red mud and high-alkali smoke dust; mixing and briquetting the de-alkalized red mud with the a reducing agent to obtain red mud briquette; and melting and separating the red mud briquette in a melting and separating furnace to obtain melted iron and tailings. Through application of the method, the alkali metals in the red mud can be effectively removed; the reducibility of the subsequent red mud iron is improved; the technical problems that the red mud is low in de-alkalization rate, the iron reducing effect is poor and the iron is difficult to recycle are solved; meanwhile, the melting and separating furnace is used for deeply reducing and separating slag iron; the products with higher recycling rate and metalizing rate can be further obtained; the method has important economic benefits.

Belonging to the field of recycling of nitrogen resources in glyphosate mother liquor, the invention discloses a process for recovery of ammonium sulfate from glyphosate mother liquor. The process iscarried out according to the steps of: S1 oxidation treatment, S2 alkalization treatment, S3 rectification treatment, S4 neutralization treatment and S5 preparation of ammonium sulfate. The process for recovery of ammonium sulfate from glyphosate mother liquor disclosed by the invention fully recovers and utilizes the nitrogen resources of glyphosate mother liquor, achieves production recycling utilization, and then further improves the economic benefits.

A method of high-temperature alkalization treatment of solid hazardous waste into a cement kiln for co-processing. In the pretreatment process of solid or plastic state or slurry hazardous waste, a modification treatment agent is added for modification treatment as an alternative raw material for cement production. The modified solid hazardous waste is sent to the discharge pipe of the cone of the C5 or C6 preheater for high-temperature alkalization, and enters the rotary kiln for high-temperature calcination into clinker minerals. The invention has the advantages of simple operation, low investment, low processing energy consumption, low processing cost and no secondary pollution. The invention can effectively burn out the organic matter in the solid hazardous waste, convert the silica-alumina / calcium inorganic minerals in the solid hazardous waste into the mineral components of cement clinker, and use the silica-alumina group / silicate group / aluminate The cluster lattice solid melts heavy metals and most of the alkalis, and converts fluorine, chlorine, and sulfur into early-strength calcium fluoroaluminate, calcium chloroaluminate, and calcium sulfoaluminate clinker minerals, avoiding the accumulation of materials in the kiln tail smoke chamber Sticky plugging is beneficial to reduce costs and increase efficiency.