35results about How to "Conducive to high-value utilization" patented technology

The invention discloses a preparation method for a bagasse cellulose nanofiber membrane. The method comprises the main steps of preparing bagasse, preparing bagasse cellulose and preparing the bagasse nano-cellulose membrane. (1) acid-base chemical treatment is carried out; (2) solution is treated through the mechanical methods such as grinding and centrifuging, and uniform biomass cellulose nanofiber is prepared; (3) membrane formation is carried out through vacuum filtration. The preparation method has the advantages that the method is simple, the cost is lower, the popularization is easy, the reclamation and effective recycling of waste are realized, the pollution to the environment is relieved, and the high-value utilization of bagasse is also facilitated.

The invention discloses an automatic bag breaking and collecting device and method for resident household garbage. The device simultaneously has three functions of garbage classified throwing, automatic bag breaking and sorting of garbage and garbage compression and volume reduction, and an integrated scheme of manual classified throwing, automatic mechanical bag breaking and sorting, compression and volume reduction, packaging and clearing and intelligent induction is adopted. The effects of classified throwing, automatic bag breaking and sorting and classified packaging and clearing of the household garbage of community residents are achieved, meanwhile, the dual characteristics of humanization and mechanization are achieved, source classification and sorting of the household garbage are facilitated, and garbage recycling and source volume reduction are facilitated. The automatic bag breaking and collecting device and method for the resident household garbage solve the problems of high management difficulty, high management cost and difficulty in realizing effective garbage source classification in the existing community resident household garbage source only depending on the consciousness of residents, and also solves the problems that source classified garbage is not compressed and subpackaged, high garbage clearing cost, heavy pollution on the way of transportation, mixed loading and terminal mixed processing in the garbage classification process and the like are caused.

The invention provides a bagasse-based mulch film and a production method thereof, and relates to the field of biomass reuse. The mulch film comprises, by weight, 40-60% of bagasse fibers, 10-20% of chitin nano-whiskers, 10-20% of bagasse biomass carbon, 1-3% of nano-CaCO3, 1-3% of nano-TiO2, 3-10% of polyvinyl alcohol, 3-10% of corn starch, 1-3% of glycerin, 1-5% of a water retention agent, 1-3%of sorbitan fatty acid ester and 0.1-0.5% of mineral matters. The production method comprises the following steps: bagasse fiber preparation, chitin nano-whisker preparation, bagasse biomass carbon preparation, nonwoven netting and bond curing. The mulch film has good strength and air permeability, is degradable, can improve soil after being degraded, and improves the utilization values.

The invention discloses a montmorillonite nano-enzyme with high peroxidase-like activity and a preparation method of the montmorillonite nano-enzyme. According to the preparation method, nitrate is taken as molten salt, iron-containing montmorillonite powder is treated by adopting a molten salt method, and the montmorillonite nano-enzyme with high peroxidase-like activity is obtained. According to the method, the natural clay mineral iron-containing montmorillonite which is rich in reserves can be used as a raw material, nitrate is used as molten salt, and the iron-containing montmorillonite is stripped by adopting a molten salt method, so that the peroxidase-like activity of the montmorillonite is improved while the microstructure of the montmorillonite is kept; the prepared montmorillonite nano-enzyme shows excellent peroxidase-like catalytic activity in normal saline, the dependence of the peroxidase-like activity of the conventional nano-enzyme on an acid environment is broken through, high-value utilization of montmorillonite mineral resources is facilitated, only two raw materials are used, montmorillonite is rich in reserve and low in price, and the method is suitable for industrial production. The preparation process is simple, the operability is high, large-scale production and preparation are easy, and the method is environment-friendly.

The invention provides a compound regeneration repairing agent for skin damage and a preparation method thereof. The repairing agent is characterized in that: the repairing agent is prepared from plasma macromolecule protein extract, tea root extract and ceramide as main materials, and borneol, polyethylene glycol (4000-8000), glycerin, epsilon-polylysine and carbomer as auxiliary materials. The compound regeneration repairing agent for skin damage is prepared by subjecting a plurality of active ingredients such as the macromolecule protein extract in plasma, the tea root extract and the ceramide to scientific compounding. The repairing agent has the effects of improving skin immunity, improving wound microcirculation, promoting angiogenesis and granulation tissue growth, significantly accelerating wound repairing and healing speed, and achieving perfect wound-free healing of wounds. The repairing agent belongs to a pure natural biological product, and is easy to absorb by the body. Compared with existing products in the market, the product of the invention has the advantages of fast curative effect, low price, convenient use, no toxic or side effect, and has good medical development value and market application prospect.

The invention discloses a preparation method of hydroxymethylated lignin. The method comprises the following steps: adding certain amounts of lignin, a formaldehyde solution and a solid base into a hydrothermal reactor, performing uniform stirring, sealing the reactor, heating the reactor to a specific temperature, carrying out a reaction for a period of time, cooling the obtained reaction productto room temperature, and carrying out washing, suction filtration and drying on the product to obtain the hydroxymethylated lignin. The method for preparing the hydroxymethylated lignin by a hydrothermal process has the advantages of easiness in operation, simplicity in post-treatment, no acidification precipitation step, facilitation of further high-value utilization of the hydroxymethylated lignin, and good application prospect.

The invention discloses a method for preventing lignin degradation intermediate product polycondensation, and relates to the technical field of biomass catalytic conversion. The method comprises the following steps: mixing a biomass raw material with a lignin protective agent, a lignin extraction solvent and an inorganic acid aqueous solution, and carrying out heating, filtering, rotary evaporation, centrifuging and drying to obtain lignin; and mixing the lignin with an amphiphilic heteropolyacid catalyst, a reaction solvent and an oxidizing agent, and carrying out degrading, filtering, extracting, and carrying out rotary evaporation to obtain a lignin degradation product. The lignin degradation monomer prepared by the invention is a highly functionalized aromatic compound and has high additional value; and the yield of the degradation monomer reaches 10-14%, which is far higher than the yield of 2-5% of the conventional lignin oxidative degradation monomer.

The invention belongs to the field of biomass utilization, and discloses a method for preparing nitrogen-doped carbon and a nitrogen-containing heterocyclic ring by using plasma. The method comprisesthe following steps: S1, mixing biomass with an activator; S2, reacting under the conditions of ammonia gas and plasma to obtain pyrolysis volatile matter; S3, carrying out a cyclization upgrading reaction on the pyrolysis volatile matter under the action of a catalyst to obtain a solid product and a nitrogen-containing heterocyclic ring volatile matter; and S4, cooling the nitrogen-containing heterocyclic ring volatile matter to obtain liquid oil enriched with the nitrogen-containing heterocyclic ring product, and carrying out acid washing, water washing and drying treatment on the solid product to obtain the porous nitrogen-doped carbon material. Plasma is introduced in the reaction process, the ammonia gas is promoted to be decomposed into nitrogen-containing free radical groups by utilizing plasmas, the reaction of the free radical groups and a biomass pyrolysis intermediate is enhanced, and the synergistic effect of the free radical groups and the activator is enhanced, so that the formation of the nitrogen-containing product is promoted, and the purpose of preparing the high-selectivity nitrogen-containing heterocyclic ring and the high-performance nitrogen-doped carbon by utilizing biomass is achieved.

The present invention discloses a preparation method for high-purity lignin. The method comprises the steps of placing a biomass raw material or a lignin raw material in a reactor, and adding water or an acidic aqueous solution into the reactor; performing hydrolysis reaction while adding the water or acidic aqueous solution; collecting a dissolved solution in the reactor during the hydrolysis reaction, cooling the reactor and terminating the reaction; cooling the solution, and then collecting the precipitate in the solution so as to obtain the high-purity lignin. According to the preparation method, the lignin raw material is hydrolyzed under a high-temperature and high-pressure condition, so that the lignin is dissolved out and separated out, the organic solvent is not needed to be added in the process, and the high-purity lignin can be extracted.

The invention relates to a method for deeply removing silicon and iron from chromite alkaline leachate. The chromite alkaline leachate comprises leachate extracted from chromite by adopting a calcium-free roasting method and/or a liquid-phase oxidation method, a desiliconizing agent and a flocculating agent are sequentially added into the chromite alkaline leachate, after the reaction is completed, the silicon and iron are deeply removed through filtration, and the desiliconizing agent comprises a precipitator and calcium aluminate. According to the method for deeply removing the silicon and iron, a chemical precipitation-adsorption combined flocculating settling method is adopted, silicon and iron in the alkaline leachate can be deeply removed by controlling the desiliconizing agent and reaction conditions, and even the silicon and the iron can be deeply removed to 5 mg/L and 0.1 mg/L respectively; and in addition, the deep silicon and iron removal method not only is beneficial to solving the problem of smooth production of the chromium salt and providing guarantee on purity of the subsequently produced chromium salt, but also can ensure that the silicon content and the iron content of pseudo-boehmite products reach the standard.

The invention discloses a catalyst for pollutant degradation under natural light, a preparation method of the catalyst and a method for degrading and adsorbing malachite green by photodriving under the natural light. The catalyst is biochar-ZnO nanoparticles taking biochar as a carrier and taking zinc oxide as an active component. According to the catalyst, spartina alterniflora filtrate is takenas a reducing agent and a dispersing agent; zinc oxide nanoparticles are uniformly mixed into spartina alterniflora powder by an ultrasonic method; the specific surface area of the catalyst is increased by a carbon aerogel technology, and therefore, reaction operation is simple, the catalyst is safe, pollution-free, high in catalytic efficiency and high in industrial utilization rate; and the catalyst has a certain application value in the aspect of degrading pollutants under the natural light.

The invention belongs to the field of organic solid waste nitrogen-rich pyrolysis, and discloses a system for coproduction of nitrogen-containing heterocyclic chemicals and nitrogen-doped carbon through nitrogen-rich catalytic pyrolysis. The system comprises an organic solid waste nitrogen-rich pyrolysis activation subsystem, a nitrogen-containing compound catalytic conversion subsystem and an ammonia gas recycling and energy supply subsystem; the organic solid waste nitrogen-rich pyrolysis activation subsystem is used for enabling the organic solid waste to generate nitrogen-rich pyrolysis volatile matters and a solid product; the nitrogen-containing compound catalytic conversion subsystem is used for carrying out catalytic conversion upgrading on the nitrogen-rich pyrolysis volatile matters to obtain liquid nitrogen-containing heterocyclic chemicals and gaseous nitrogen-rich pyrolysis gas; and the ammonia gas recycling and energy supply subsystem is used for separating and purifyingthe nitrogen-rich pyrolysis gas. By improving the structures, arrangement modes, the matched working modes and the like of all components in the system, the problems that the selectivity and the yieldof organic solid waste nitrogen-rich pyrolysis liquid products are low, and the porosity and the nitrogen content of nitrogen-doped carbon are not high can be effectively solved.