40results about How to "Industrial Feasibility" patented technology

The application of a high-efficiency inhibitor 5'-ATP-2Na in magnesite positive flotation decalcification belongs to the field of magnesite flotation decalcification inhibitors. This application is to add highly effective inhibitor 5′‑ATP‑2Na (adenosine‑5′‑triphosphate disodium salt hydrate) in the preparation of magnesite slurry during the magnesite positive flotation decalcification process The amount of added efficient inhibitor 5′-ATP-2Na accounts for 0.8mmol / L~1.3mmol / L in molar concentration of magnesite pulp; the mass percentage concentration of magnesite in magnesite pulp is 15~30 %. The high-efficiency inhibitor 5′-ATP-2Na is used for the decalcification of magnesite by positive flotation. Under the sodium oleate or oleic acid flotation system, by adding the high-efficiency inhibitor 5′-ATP-2Na, the simultaneous expansion of magnesite The flotation difference of the calcium gangue mineral dolomite realizes the efficient separation of magnesite and dolomite, thereby reducing the magnesium impurities to improve the quality of magnesite concentrate products, and providing a new method for the flotation separation of high calcium and low grade magnesite flotation inhibitors.

The invention provides a method for preparing high-grade sucrose fatty acid ester from woody oil, comprising the following steps of: mixing woody oil, lower alcohol and an aqueous sodium hydroxide solution for reacting, after the reaction is ended, regulating the pH value to be faintly acid, standing for demixing, separating out a liquid at the upper layer and a hydrous crude glycerol phase at the lower layer; then mixing the liquid at the upper layer with the lower alcohol for sealing, freezing at low temperature, then filtering to obtain a clear filtrate, dissolving filter cakes, and then carrying out reduced pressure distillation to obtain a saturated fatty acid; mixing the clear filtrate with urea, heating until the mixture is dissolved, filtering after freezing at low temperature, rotatably evaporating the filtrate, then dissolving with a non-polar solvent, filtering, rotatably evaporating the filtrate to obtain polyunsaturated fatty acids; and finally, under the protection of N2, mixing the separated fat acids with sucrose, a cosolvent and a catalyst, heating for reacting, and refining the reaction mixture with a two-phase extraction method to obtain the sucrose fatty acid ester. The invention has the characteristics of easy obtaining of rich raw materials, low cost, easy separation of product, stable performance, high purify, and the like.

The invention relates to a flexible, environmentally-friendly, transparent and adjustable-illuminant-color film material and a preparation method thereof, belonging to the field of photoelectric functional high polymer materials. The preparation method comprises the following steps of: diluting mercaptopropionic acid with a DMF (Dimethyl Formamide) solvent, and mixing with a chloroform solution of quantum dots CuInS2 / ZnS to obtain a DMF colloidal solution of the quantum dots; dispersing cyanoethyl cellulose into the DMF solvent, and stirring till the cyanoethyl cellulose is fully dissolved and the concentration of the cyanoethyl cellulose is 10-100 g / L to obtain a DMF solution of cyanoethyl cellulose; mixing the two solutions at room temperature till the quantum dots account for 2.5-25 percent by mass of the cyanoethyl cellulose, and stirring till the quantum dots are uniformly distributed in the DMF solution of the cyanoethyl cellulose to obtain a mixed solution; and pouring the mixed solution to prepare the film material. The obtained film material has the characteristics of nontoxicity, environmental friendliness, transparency, flexibility, adjustable illuminant color and adjustable area. The preparation method is simple and has low cost and high industrial practicability.

The invention discloses a method for synthesizing 1,4-dioxane-2-ketone by ethylene glycol. The method comprises the following steps of: 1, synthesis of ethylene glycol monosodium: mixing a dehydrating agent, ethylene glycol and sodium hydroxide for reaction, cooling down the mixed solution to the room temperature after reaction, standing the mixed solution for demixing to obtain upper-layer liquid, and directly using the upper-layer liquid in the next reaction, wherein the ethylene glycol mixed in the lower-layer ethylene glycol monosodium is unnecessarily separated; 2, synthesis of beta-hydroxyethoxy sodium acetate: mixing ethylene glycol, sodium monochloroacetate and ethylene glycol monosodium for reaction, adding sulfolane to the mixed solution after reaction, recovering ethylene glycol by vacuum distillation, cooling down the mixed solution, then adding acetone to the mixed solution, and obtaining a coarse product of beta-hydroxyethoxy sodium acetate; and 3, synthesis of 1,4-dioxane-2-ketone by ethylene glycol: adding beta-hydroxyethoxy sodium acetate to an oxygen heterocycle containing solvent, slowly adding concentrated sulfuric acid to the mixed solution dropwise when the mixed solution is stirred, and obtaining the finished product of 1,4-dioxane-2-ketone by ethylene glycol. The method takes ethylene glycol as a synthetic raw material, the products are easily separated, and the selectivity is high; and the solvents used in the reaction can be recovered in high efficiency for reutilization, so that the method is environment friendly.

The invention relates to a method for flotation and silica removing of bonamite zinc oxide ore, in particular to a bonamite and quartz flotation separation method, and belongs to the technical field of mineral flotation separation in the field of mineral process engineering. According to the method for flotation and silica removing of bonamite zinc oxide ore, a to-be-treated mixed ore sample of bonamite and quartz and deionized water are mixed, and the mass ratio of the deionized water to the ore sample is 3-5:1; sodium carbonate is adopted as a pH value adjusting agent firstly, a collecting agent is added in evenly-stirred pulp, and the usage amount of the collecting agent is 300-360 g / t; and the pulp in which the collecting agent is subjected to flotation after being evenly stirred. Thecollecting agent is N,N'-bi-fatty acyl group quadrol bi-sodium propionate. According to the provided method for flotation and silica removing of bonamite, the regime of agent is simple, the technologyprocess is simple, operation is convenient, and good industrial feasible prospects are achieved.

The invention relates to a method for purifying hemimorphite from quartz through flotation, in particular to a hemimorphite and quartz flotation separation method, and belongs to the technical field of mineral flotation separation in the field of mineral processing engineering. According to the method for purifying the hemimorphite from the quartz through flotation, a to-be-processed hemimorphiteand quartz mixed ore sample is mixed with deionized water, a collecting agent is added in ore pulp stirred to be uniform, wherein the use quantity of the collecting agent ranges from 750 g / t to 900 g / t; and flotation is conducted after the ore pulp with the added collecting agent is stirred to be uniform, wherein the collecting agent is N, N'-difatty acyl thylenediamine dipropionate. The method for purifying the hemimorphite from the quartz through flotation is simple in technological process, simple in agent regime and convenient to operate and has good industrial feasibility prospects.

The invention discloses a preparation method of N-alkyloxy oxalyl alanine alkyl ester, comprising the steps of: subjecting pyruvic acid alkyl ester (2) and oxamic acid alkyl ester (3) to a reductive amination reaction so as to obtain a target compound (1) directly in the following reaction route; or, conducting a dehydration reaction to pyruvic acid alkyl ester (2) and oxamic acid alkyl ester (3) first so as to obtain an intermediate Schiff base (4), which then undergoes a reduction reaction, thus obtaining the target compound (1), with a following reaction route; wherein, R1 and R2 respectively represent methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or t butyl. With the advantages of simple operation, short preparation period, low energy consumption, strong industrial feasibility and the like, the preparation method provided in the invention can satisfy the requirements for large-scale industrial production.

The invention belongs to the technical field of fine chemical wastewater treatment, and in particular relates to a device for treating high-salt wastewater containing phenol and aniline (fine chemical wastewater such as high-salt phenol and aniline produced in the production process of 2,6-dichlorotoluene products) and processing methods. The device is used to separate the pollutants phenol and aniline in the wastewater by means of continuous extraction. After the extraction, the wastewater is then adsorbed by resin, so that the treated wastewater TOC is less than 350mg / L and then undergoes high-salt biochemical treatment, which realizes the purification of wastewater. For the treatment, the phenol and aniline in the wastewater are separated by two-stage continuous extraction, and the characteristic pollutants phenol and aniline are separated at the same time, and made into resources. The invention has the characteristics of industrial feasibility, continuous operation, reasonable design of device structure, and remarkable treatment effect. , Aniline resources.

The invention provides a biologic polycarbonate and a preparation method thereof. The biologic polycarbonate is obtained by polymerizing biologic epoxy fatty acid ester serving as a raw material and CO2 gas, the yield is more than or equal to 70 percent, the number-average molecular weight is 11,000 to 30,000, and the molecular weight distribution is 1.10 to 1.74; and the biologic epoxy fatty acid ester is obtained by hydrolyzing, freezing and separating unsaturated fatty acid ester from natural vegetable fat and then performing epoxidation, or obtained by direct epoxidation of the natural vegetable fat. The renewable natural vegetable fat and the greenhouse gas CO2 are used as raw materials, so the method is environment-friendly, low in cost and simple and feasible in process operation, the solvent and the catalyst can be efficiently recycled, and the method is environment-friendly and suitable for industrialized production.

The invention relates to an agomelatine tablet and a preparation method thereof, as well as a coated tablet of the agomelatine tablet and a preparation method thereof. The agomelatine tablet comprises the following components in percentage by weight: 10 to 15 percent of agomelatine, 80 to 89 percent of filler, 0.1 to 2 percent of sodium carboxymethyl starch serving as a disintegrating agent, 0.5 to 4 percent of lubricant, and 0.5 to 2 percent of adhesive. The agomelatine tablet has reasonable prescription and stable preparation process, good effects to auxiliary material selection and content selection of main drug and auxiliary materials, and low production cost.