9results about How to "Realize full component utilization" patented technology

This invention discloses a method for preparing high-quality bio-based 1,9-nonanediol, comprising the following steps: transesterification, precipitation, fatty acid methyl ester refining, ozone oxidation pyrolysis, solvent recovery, esterification, dimethyl azelaate refining, and hydrogenation to obtain high-quality bio-based 1,9-nonanediol. This invention achieves gradient and full-component utilization of vegetable oil raw materials: the oil-based portion of triglycerides is used to produce high-quality bio-based 1,9-nonanediol, while simultaneously producing byproducts such as methyl palmitate, methyl stearate, propionic acid, hexanoic acid, and nonanoic acid; the glycerol-based portion of triglycerides is used as a byproduct of glycerol production. This invention utilizes esterification to reconstruct the products of ozone oxidation pyrolysis, converting the high-boiling-point monomethyl azelaate into the low-boiling-point dimethyl azelaate, achieving efficient separation from saturated fatty acid methyl esters. The dimethyl azelaate, as a raw material, is then hydrogenated to obtain high-quality nonanediol, significantly reducing production costs.

The invention belongs to the technical field of solid waste resource utilization, discloses a resource recycling method for iron and aluminum in red mud based on step-by-step acid leaching, and effectively solves the problems of complex process and high acid and alkali consumption still existing in synergistic efficient separation and recycling of iron and aluminum in current red mud. Comprising the steps of red mud pretreatment, step-by-step iron leaching through waste sulfuric acid, aluminum leaching through waste hydrochloric acid, iron recovery through sodium carbonate precipitation, and aluminum recovery through pH adjustment after alkali dissolution separation. According to the method, high-selectivity leaching of the iron and the aluminum is achieved through step-by-step acid leaching, the cost is reduced through industrial waste acid, high-purity separation and recovery of the iron and the aluminum are achieved through step-by-step precipitation, and the method is simple in process, high in resource recovery rate, environmentally friendly and suitable for large-scale resourceful treatment of the red mud.

This invention discloses a process for recovering germanium from germanium-silicon alloy waste, belonging to the field of germanium recovery technology. The process includes the following steps: S1. Oxidizing and roasting the germanium-silicon alloy waste to obtain roasted clinker; S2. Sulfidating and fixing the roasted clinker and pyrite to obtain activated clinker; S3. Leaching the activated clinker with sulfuric acid, followed by solid-liquid separation, and collecting the germanium-containing leachate; S4. Performing multi-stage countercurrent extraction on the germanium-containing leachate using an amine extractant to obtain a loaded organic phase; then back-extracting the loaded organic phase with an alkaline back-extraction solution to obtain a germanate solution; S5. Hydrolyzing and precipitating the germanate solution to obtain pure germanium dioxide. The roasting process of this invention fixes impurities and activates elemental germanium into soluble germanium dioxide. The purification stage efficiently separates germanium from other impurity ions, and the final hydrolysis precipitation controls product consistency. This invention's recovery process has high recovery efficiency and purity, is more environmentally friendly, and is expected to achieve large-scale production.

This invention provides a highly efficient method for treating red mud using a combined acid-base method, relating to the field of comprehensive utilization of red mud. The method uses industrial byproducts hydrochloric acid and sodium hydroxide as leaching agents. Through a step-by-step process—red mud pretreatment, acid leaching for silicon removal, ammonia production and silicon fertilizer preparation, iron powder reduction for titanium extraction and neutralization of the acid leaching solution with ammonia, alkaline leaching for iron and aluminum separation, and the harmless recycling of red mud—it achieves precise separation and recovery of valuable metals such as titanium, iron, and aluminum from red mud. Simultaneously, it completes the production of silicon fertilizer from silicon tailings, the closed-loop recycling of alkaline resources, and the harmless treatment of red mud. This invention solves the technical problems of low resource recovery efficiency, high equipment costs, severe secondary pollution, and high carbon emissions associated with traditional red mud treatment processes. It achieves the resource utilization of all components of red mud, with no wastewater or waste residue discharge. The iron concentrate grade is ≥65%, the titanium concentrate grade is ≥95%, and the sodium aluminate solution can be reused in aluminum plant production lines. The reagent consumption cost per ton of red mud is reduced to below 40 yuan, making it valuable for large-scale industrial application.

The invention relates to the technical field of soft soil treatment, and discloses a curing agent for coastal soft soil and a manufacturing process of the curing agent. The process comprises the following steps: carrying out coarse and fine grading pretreatment on the furnace bottom slag, carrying out acid activation treatment on the zeolite powder, carrying out surface modification treatment on the basalt fiber, preparing a component A delayed coagulation curing agent, preparing a component B coagulation accelerating curing agent, and compounding the two components in proportion for use. The curing speed can be adjusted within 15-90 minutes by compounding the component A and the component B according to different mass proportions, and a double-phase structure of a rigid framework and a gelling matrix is formed by the surface modified basalt fibers and graded furnace bottom slag coarse particles. The rheological property of slurry is adjusted through selective ion adsorption of acid activated zeolite powder and molecular chain extension of hydroxypropyl methyl cellulose, and the technical problems that a coastal soft soil curing agent is large in brittleness, poor in construction adaptability, non-adjustable in curing speed and low in synergistic utilization rate of various solid wastes are solved.

The application discloses a kind of biobased core-shell carbon silicon material and its in-situ synthesis method and application, by in-situ method to rice husk as raw material, prepared the core-shell type biobased carbon silicon material, realize the full component utilization of rice husk, its raw material is cheap, easy to get, low energy consumption in preparation process, no toxic gas is generated, green and environmental protection.Carbon silicon in product combination makes the material play the elasticity of carbon material, effectively inhibits the volume expansion of silicon, and carbon layer also better improves the conductivity of material, so that the material has better electrochemical performance.On the other hand, the application uses rice husk as raw material, greatly reduces the cost of raw material, so that the material has better commercial application prospect.

The application relates to a method for preparing regenerated fluorite from waste aluminum electrolyte by roasting-water washing-alkali leaching, and belongs to the technical field of metallurgical engineering. Waste electrolyte is mixed with calcium oxide and then roasted, so that fluorine is converted into water-insoluble calcium fluoride, lithium is converted into lithium oxide, and aluminum is converted into calcium aluminate. The roasted clinker is subjected to water washing to preferentially extract lithium and remove soluble impurities, so that a lithium-rich solution and a water washing residue are obtained. The water washing residue is subjected to alkali leaching to remove aluminum hydroxide, high-purity calcium fluoride solid is obtained, and the regenerated fluorite product is obtained after drying, the grade of which is greater than 80%. The sodium fluoroaluminate solution generated by alkali leaching can be recycled, and after saturation, aluminum hydroxide is recovered and further used for preparing aluminum oxide; the water washing liquid can be concentrated to recover lithium salt. The application realizes harmless and resource utilization of the waste electrolyte, has simple process, low cost, high comprehensive recovery rate of fluorine, lithium and aluminum, and good economic and environmental protection benefits.

The invention discloses a composite hydrogel microsphere delivery system and a preparation method thereof. The composite hydrogel microsphere delivery system comprises: (a) a plurality of plant-derived exosome-like nanovesicle (PDEV) cores; (b) a bioactive substance entrapped in the plant-derived exosome-like nanovesicle core or combined with the plant-derived exosome-like nanovesicle core; (c) a hydrogel matrix encapsulating the (a) and (b); plant fiber components are embedded in the hydrogel matrix. The system not only can utilize the macroscopic gastric acid protection and intestinal fixed-point release characteristics of the hydrogel microspheres, but also can provide a stable and friendly microenvironment for the PDEV nano-vesicles in the microspheres, so that an active carrier (PDEV) and an active endosome (ALA) thereof are completely and jointly delivered to an intestinal absorption part; and the dual problems of gastric acid degradation and poor intestinal absorption are solved synergistically.

The application discloses a preparation method of biomass Fischer-Tropsch synthesis diesel oil, which comprises the following steps: converting cellulose and lignin in biomass into biomass synthesis injection powder fuel through superheated steam pressure reduction hydrothermal carbonization of wood fiber biomass raw materials; producing biomass synthesis gas through pressurized entrained flow bed high-temperature gasification of the biomass synthesis injection powder fuel, wherein the gasification agent is oxygen and water vapor, and the biomass synthesis gas is adjusted to H / C=2-3:1; and producing biomass Fischer-Tropsch synthesis diesel oil through a Fischer-Tropsch synthesis process of the biomass synthesis gas. The biomass Fischer-Tropsch synthesis diesel oil can be produced in a large scale and continuously by using the biomass synthesis injection powder fuel obtained through superheated steam pressure reduction hydrothermal carbonization of biomass.