34results about How to "Many times of recycling" patented technology

The invention discloses a surface negatively-charged functional melamine sponge as well as a preparation method and application thereof, and belongs to the field of chemical synthesis functional polymer materials. The preparation method comprises the following steps: a melamine sponge is modified by using polydopamine, the polydopamine-modified melamine sponge is activated in an acidic solution for a certain period of time to make amino of the polydopamine on the surface of the sponge fully protonated, so that the surface of the sponge has as much positive charges as possible, a certain amountof an anionic polyelectrolyte is added in the activated solution system, electrostatic self-assembly is performed, and therefore the stable surface negatively-charged functional melamine sponge is prepared. According to the method provided by the invention, the surface negatively-charged functional melamine sponge prepared by the method has higher adsorption performance and recovery efficiency for cationic dyes and heavy metal ion contaminants on the basis of maintaining excellent adsorption capacity of a substrate, has low treatment costs and simple and convenient operation, and can be recycled and used for a plurality of times; and the surface negatively-charged functional melamine sponge can be used to adsorb the cationic dyes and the heavy metal ions in wastewater.

The invention discloses a preparation method of a superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification. The preparation method provided by the invention adopts natural polyphenol tannic acid, long-chain alkylamine to modify a surface of a mesh membrane material, simultaneously realizes 'micro-nano structure' and 'low surface energy' of the surface of the material, prepares the superhydrophobic and super-lipophilic oil-water separation mesh membrane, avoids an additional construction process of a surface microstructure, has advantages of easily available and source-extensive raw materials and simple preparation process; and the prepared superhydrophobic and super-lipophilic oil-water separation mesh membrane has relatively good selectivepermeation for oil substances, low treatment cost, simple operation, recyclability and usability for multiple times.

The invention discloses a silica immobilized double-acid functionalized ionic liquid. The structural formula of the immobilized ionic liquid is shown as the specification. As a catalyst, the immobilized ionic liquid not only inherits the advantages of high activity and high selectivity of homogeneous ionic liquid, can efficiently converts carbohydrates to prepare high value-added chemicals, but also overcomes the disadvantages of difficult separation, large consumption and the like of homogeneous ionic liquid, realizes regeneration and recycling of catalyst, and lays a good foundation for industrial application. The invention also discloses a preparation method of the silica immobilized ionic liquid and application of the silica immobilized ionic liquid as a catalyst in carbohydrate hydrolysis for preparation of furfural compounds (furfural and 5-hydroxymethylfurfural).

The invention discloses a compound desulfurizer which comprises the following components by weight part: 5-10 parts of zinc oxide grains, 8-6 parts of calcium oxide, 6-8 parts of sodium carbonate, 4-6 parts of alkaline aluminum sulfate, 5-8 parts of coke, 4-6 parts of calcium fluoride, 5-8 parts of cocoanut active charcoal, 4-8 parts of modified attapulgite, 5-8 parts of auxiliary adsorbing components, 2-6 parts of a pore-enlarging agent, 4-5 parts of aluminum oxide, 4-10 parts of manganese oxide grains and 5-8 parts of a catalyst. The compound desulfurizer according to the technical scheme of the invention can be used for desulfurizing to below 1ppm and has the advantages that the adsorbing sulfur capacity is large, the operation cost is low, no pollution exists and the service life is long; the preparation method is simple in technique, is low in cost, is fit for industrial production and is free from generation of harmful matter.

The invention discloses a shape memory alloy spring-actuated controlled unlocking device, comprising a separated part and an unlocking device for driving the separated part to generate displacement, wherein the unlocking device comprises a cylinder body and an unlocking driving device arranged in the cylinder body, one end of the separated part is accommodated in the cylinder body, the outer surface of the separated part is provided with a clamping groove, the unlocking driving device comprises an elastic clamping ring, a shape memory alloy spring and a heating guiding post for heating the shape memory alloy spring for enabling the shape memory alloy spring to generate deformation. The shape memory alloy spring-actuated controlled unlocking device has the beneficial effects that the shape memory alloy spring is used for driving the separated part, so that the separation of the separated part from a separating part can be quickly and accurately realized under a variety of working conditions; and the unlocking device is simple in structure, flexible in movement and convenient to use and maintain, is pollution-free and can be recycled for repeated utilization, the reliability and the stability of the unlocking device are improved, the service life of the unlocking device is prolonged, and the development of the unlocking device is promoted.

The invention discloses a preparation method of a super-hydrophobic oil-water separation material based on plant polyphenol-amino silicone oil modification. The super-hydrophobic oil-water separationmaterial is prepared by utilizing reactions between catechol groups and derivative groups of natural polyphenol substances and groups (amino and the like) of amino silicone oil. The whole reaction process is carried out in a water solution, and the method has the characteristics of low cost, no pollution, simple preparation process, wide raw material source, and the like. The prepared super-hydrophobic oil-water separation material has a good separating performance on oil substances, is low in treatment cost and simple and convenient to operate, and can be recycled for multiple times.

The invention discloses a preparation method of an underwater super-oleophobic oil-water separation mesh membrane based on tannic acid modification. The preparation method utilizes tannic acid to modify a surface of a mesh membrane material, and attaches a bionic zwitterionic compound substance to the surface of the mesh membrane material by reaction with a catechol group of tannic acid and a derivative group thereof, thereby preparing the super-hydrophilic / underwater super-oleophobic oil-water separation mesh membrane. The preparation method is simple in preparation process, low in preparation cost, suitable for industrial production, easily available in raw material and extensive in source of the raw materials; and the prepared superhydrophobic and super-lipophilic oil-water separation mesh membrane has relatively good selective permeation for water, low treatment cost, simple operation, recyclability and usability for multiple times.

The invention discloses a desalination method for cooperatively treating edible fungus salinizing water based on halophilic microorganism complex inoculants and a three-stage type membrane technology. The method comprises the following steps: adding a microorganism complex inoculant I into the edible fungus salinizing water, and aerating and culturing for 5 days; then, carrying out three-stage type membrane treatment on the salinizing water to realize desalting; and finally, adding a microorganism complex inoculant II into the salinizing water subjected to three-stage type membrane treatment, and aerating and culturing for 4 days. The method disclosed by the invention has the advantages that the cost is reduced, the treatment method is more ecological and safer; a desalination rate of the finally obtained edible fungus salinizing water can be over 97%.

The invention relates to a preparation method of a graphene oxide / cellulose composite biological supported biodiesel catalyst. The graphene oxide / cellulose composite biobased supported catalyst is made by adopting microwave-assisted ionic liquid dissolution cellulose technology, high-speed homogeneous ultrasonic-assisted peeling technology, particle-size-controllable sphere preparation technology, composite microsphere amino modification technology and supporting-amount-controllable composite microsphere supporting technology. Through adjustment of technical parameters, catalysts with different particle sizes, amino grafting types and heteropoly acid supporting amounts are obtained and can be used for adapting to different base oil types, reactant consumption and reaction environments, thereby achieving the maximum biodiesel yield. Moreover, the prepared composite microsphere catalyst selects renewable raw materials, is low in price, and is green and eco-friendly. The catalyst is excellent in catalytic activity and mechanical property, high in recycling frequency, and convenient to recycle after reaction, and is an ideal heterogeneous catalyst in biodiesel production.

The invention belongs to the field of food additives and particularly relates to a preparation method of butylparaben. With the method, home-made solid super acid is used as a catalyst, p-hydroxybenzoic acid and n-butyl alcohol are used as reaction raw materials, and a product is obtained through an esterification reaction. The home-made catalyst is the solid super acid obtained by roasting ammonium ferric sulfate dodecahydrate. Ammonium ferric sulfate dodecahydrate is ammonium ferric sulfate dodecahydrate waste after catalysis of the esterification reaction. With the method, industrial waste is recycled, the discharge of the solid waste is reduced, and the method has the good environmental protection benefit; and meanwhile, the catalyst prepared with the method has the advantages of being good in catalytic activity, high in selectivity, capable of recycled repeatedly and the like.

The invention discloses a preparation method of an improved wood-plastic composite material. The preparation method comprises the following steps: high-density polyethylene melting, dyeing, mixing andmolding. The wood-plastic composite material comprises 50-70 wt% of high-density polyethylene, 10-20 wt% of nylon plastic powder and 20-30 wt% of wood fiber powder. The wood-plastic composite material is prepared by uniformly mixing the above components. The high-density polyethylene is used as a main raw material, and is mixed with nylon plastic and wood fiber powder, and the addition of the wood fiber powder makes the wood fiber powder completely coated with a high-density polyethylene melt, so the hygroscopicity of the wood fiber powder is greatly reduced, and the dispersibility, the oxidation resistance and the flame retardancy are greatly improved, thereby the strength of the wood-plastic composite material is increased; and the addition of the nylon plastic further improves the strength, and products manufactured from the wood-plastic composite material have excellent oxidation resistance, flexural resistance and bending resistance, and can meet the needs of use.

The invention discloses a silica gel modified desulfurizing agent. The silica gel modified desulfurizing agent consists of the following raw materials in parts by weight: 26-30 parts of tetraethylortho silicate, 3-4 parts of aluminium dihydrogen phosphate, 1-2 parts of polyvinyl alcohol, 0.7-1 part of ethylene bis stearamide, 15-20 parts of tetrabutyl titanate, 2-3 parts of cyanoethyl cellulose, 3-5 parts of lime powder, 2-3 parts of sodium myrastate, 0.8-1 part of lauryl alcohol phosphoric acid ester potassium, 2-3 parts of palm wax, 0.1-0.2 part of ammonium ferrous sulfate, 0.5-1 part of dibutyltin dilaurate, 1-2 parts of trimethylolpropane, 2-4 parts of barium stearate, 0.7-1 part of 1-ethoxyl-2-oleic imidazoline and 5-8 parts of stannic oxide. The finished product is large in specificsurface area, high in activity, good in desulfurization performance, high in recycling frequency, good in stability and excellent in overall performance.

The invention discloses a preparation method of a superfine-fiber-shaped polymer immobilized catalyst. The preparation method comprises the steps of: adopting functional ion-grafted itaconic acid-based polyurethane as a raw material, utilizing an electrostatic spinning process to prepare superfine fiber, and then performing cross-linking to obtain the superfine-fiber-shaped polymer immobilized catalyst, wherein the superfine fiber has a diameter of 0.01-4 [mu]m and a length of 2-150 mm. Through the preparation method of the superfine-fiber-shaped polymer immobilized catalyst, the polymer immobilized catalyst with integrated effects of powerful catalysis, high surface activity and easy separation is prepared, and the problems of difficult recovery of catalysts and bad corrosion of the catalysts to devices are solved synchronously; and the polymer immobilized catalyst can be applied to sugar conversion reactions.

The invention discloses a temperature monitoring device for liquid of a feeding bottle. The temperature monitoring device for the liquid of the feeding bottle comprises a waterproof elastic clamping strap, a plurality of digital temperature sensors, a heat-insulation base plate, a temperature monitoring circuit board, a temperature display screen, a temperature double-color indicator lamp and a power supply battery, wherein the digital temperature sensors are adhered to the inner surface of the waterproof elastic clamping strap; the heat-insulation base plate is fixedly connected to the outer surface of the waterproof elastic clamping strap; the temperature monitoring circuit board, the temperature display screen, the temperature double-color indicator lamp and the power supply battery are fixedly connected to the heat-insulation base plate; a temperature monitoring circuit is integrated on the temperature monitoring circuit board and consists of a singlechip, a crystal oscillator circuit and a resetting circuit; the crystal oscillator circuit and the resetting circuit are connected with the singlechip; the digital temperature sensors are connected with a signal inputting end of the singlechip; the temperature display screen and the temperature double-color indicator lamp are connected with a signal outputting end of the singlechip; and the singlechip, the resetting circuit, the temperature display screen and the digital temperature sensors are connected with the power supply battery. The temperature monitoring device is convenient to use and operate, and is energy-saving and environment-friendly; and the circumstance that a baby is scalded or suffers from gastrointestinal discomfort due to the fact that the baby drinks over cold liquid can be avoided.

The invention belongs to the fields of material chemistry, gas separation or purification and the like, and relates to a novel preparation method for an efficient desulfurization agent, wherein an ultrasonic synergism method is adopted to prepare the supported desulfurization agent. The preparation method comprises: dissolving tetraethoxysilane in an alcohol mixed solution, and carrying out stirring heating, wherein a mass ratio of the tetraethoxysilane to the alcohol mixed solution is 0.1-1:1, and the heating temperature is 50-100 DEG C; and adding Na2CO3 to the obtained solution, continuously carrying out mechanical stirring, opening an ultrasonic irradiation device, and adding distilled water to produce a transparent gluey material, wherein the reaction temperature is 50-100 DEG C, and the reaction time is controlled to 1-10 h; and closing the ultrasound, and aging the gluey material at a room temperature to obtain the target desulfurization agent. With the preparation method for ultrasonic preparation of the supported desulfurization agent, the excellent desulfurization agent with characteristics of high specific surface area, high activity, good desulfurization performance and more recycling times can be prepared, and requirements of researches and applications of the after-combustion dry desulfurization can be easily met.

The invention relates to a method for preparing a supported solid amine adsorbent in an ultrasonic synergy manner. Tetraethyl orthosilicate is dissolved in a mixed solution of alcohols, stirring and heating, the mass ratio of the tetraethyl orthosilicate to the mixed solution of alcohols is 0.1-1:8, and the heating temperature is 30 DEG C-120 DEG C; and organic amine is added to the solution, thenultrasound is started, then distilled water is added, a gelatinoid is generated by reaction, and after the gelatinoid is aged at room temperature, a target product is obtained. The method can preparean excellent CO2 adsorbent with large specific surface area, high activity, good carbon capture performance and many times of cyclic utilization, and is beneficial to research and application need ofCO2 capture by a dry method after combustion.

The invention discloses a novel process for drying peanut seeds. The novel process is characterized in that the steps are that S1, primary drying is carried out; S2, secondary drying is carried out; S3 and third-time drying is carried out. The invention also discloses a peanut seed desiccant for the novel process for drying the peanut seeds. The peanut seed desiccant is made of the following raw materials including, by weight, 25-35 parts of cinerite, 5-10 parts of sea-foam stone powder, 15-30 parts of bentonite, 6-10 parts of active silicon, 3-6 parts of hydroxypropyl-beta-cyclodextrin, 2-4 parts of super absorbent resin, 3-5 parts of aluminium oxide and 100-150 parts of water. The novel process for drying the peanut seeds is simple, convenient to operate, not high in equipment and reaction condition requirement, capable of quickly and safely drying the peanut seeds, capable of effectively prolonging the service life of the peanut seeds, capable of preventing heating and deteriorationof wet peanut seeds and inhibiting microorganisms growth, beneficial to storage and transportation of the peanut seeds and capable of better promoting germination of the peanut seeds. Higher economic, social and ecological values are achieved.

The invention relates to a method for efficiently hydrolyzing soybean isoflavone glycosides. The method specifically includes that cellulose-binding domain genes and beta-glucoside enzyme genes are subjected to fusion expression in pichia pastoris by using a gene engineering method; an obtained protein-infused cellulose-binding domain is combined with cellulose through hydrophobic effect to realize immobilization of glucosaccharase. Compared with other immobilization methods, the method has the advantages that pre-purification of enzyme is not needed, assistance in immobilization by other reagents is not needed, time and material cost needed for immobilization is greatly reduced, the enzyme is easy to recycle, industrial mass utilization is favored, and the immobilized beta-glucoside enzyme is quite good in stability and good in hydrolysis capability on the soybean isofalvone glycosides.

The invention discloses a method for regenerating activated carbon. Firstly, pretreatment is performed under relatively low temperature, and then the short-time activating regenerating reaction is performed. The two steps are synergic with each other, so that the temperature and time required by the traditional method for regenerating activated carbon are greatly reduced, the purposes of saving energy and reducing consumption can be achieved, and the yield, quality and regenerating efficiency of the activated carbon also can be increased.

The invention discloses a preparation method for a supported solid-acid catalyst for synthesising 2-isonaphthol via the one-step hydroxylation of naphthalene, belonging to the technical field of supported solid-acid catalysts, wherein via the technical scheme of soaking a supporter in a solution containing an auxiliary constituent precursor in a vacuum condition, vibrating and drying in a low-temperature water bath, and calcining for 1-3 hours at 400-600 DEG C at first, and then soaking the calcined powder in the solution containing an auxiliary constituent precursor in a vacuum condition, vibrating and drying in the low-temperature water bath, and baking in an airflow at 110-300 DEG C, a solid-acid catalyst which is adjustable in surface acidity and high in the dispersibility of active constituents is prepared. With the adoption of the method, the various problems existing in the prior art are effectively solved, the conversion rate of naphthalene and the selectivity of 2-isonaphthol are greatly increased, and good effects are obtained.

The invention discloses a silica immobilized double-acid functionalized ionic liquid. The structural formula of the immobilized ionic liquid is shown as the specification. As a catalyst, the immobilized ionic liquid not only inherits the advantages of high activity and high selectivity of homogeneous ionic liquid, can efficiently converts carbohydrates to prepare high value-added chemicals, but also overcomes the disadvantages of difficult separation, large consumption and the like of homogeneous ionic liquid, realizes regeneration and recycling of catalyst, and lays a good foundation for industrial application. The invention also discloses a preparation method of the silica immobilized ionic liquid and application of the silica immobilized ionic liquid as a catalyst in carbohydrate hydrolysis for preparation of furfural compounds (furfural and 5-hydroxymethylfurfural).

The invention discloses a method for preparing an improved wood-plastic composite material, which includes the steps of melting, dyeing, mixing, and molding high-density polyethylene. The wood-plastic composite material includes the following components in weight percentage: high-density polyethylene 50-70%; nylon plastic powder 10-20%; wood fiber powder 20-30%. The wood-plastic composite material is obtained by uniformly mixing the above-mentioned components. The improved wood-plastic composite material of the present invention uses high-density polyethylene as the main raw material, and then mixes nylon plastic and wood fiber powder, and adds wood fiber powder so that it is completely covered by high-density polyethylene melt, so that the wood fiber powder The hygroscopicity is greatly reduced, and the dispersibility, oxidation resistance and flame retardancy are greatly improved, thereby improving the strength of the wood-plastic composite material; and the addition of nylon plastic further improves its strength, and the products manufactured by the wood-plastic composite material Oxidation resistance, bending resistance, bending resistance and other properties are excellent, which can meet the needs of use.

The invention belongs to the fields of material chemistry, gas separation or purification and the like, and relates to a novel preparation method for an efficient desulfurization agent, wherein an ultrasonic synergism method is adopted to prepare the supported desulfurization agent. The preparation method comprises: dissolving tetraethoxysilane in an alcohol mixed solution, and carrying out stirring heating, wherein a mass ratio of the tetraethoxysilane to the alcohol mixed solution is 0.1-1:1, and the heating temperature is 50-100 DEG C; and adding Na2CO3 to the obtained solution, continuously carrying out mechanical stirring, opening an ultrasonic irradiation device, and adding distilled water to produce a transparent gluey material, wherein the reaction temperature is 50-100 DEG C, and the reaction time is controlled to 1-10 h; and closing the ultrasound, and aging the gluey material at a room temperature to obtain the target desulfurization agent. With the preparation method for ultrasonic preparation of the supported desulfurization agent, the excellent desulfurization agent with characteristics of high specific surface area, high activity, good desulfurization performance and more recycling times can be prepared, and requirements of researches and applications of the after-combustion dry desulfurization can be easily met.

The invention discloses an oil-water separation material based on procyanidine modified shaddock peels and a preparation method thereof. Procyanidine is used for carrying out a proper surface pretreatment and modification on the surface of a shaddock peel based material, and the reaction activity is reserved. Moreover, through reactions between catechol groups and derivative groups of procyanidineand amino groups of an amino-containing hydrophobic modifier, the preparation of the super-hydrophobic oil-water separation material, which is based on a green base material and modified raw materials, low in cost, free of pollution, simple in preparation process and wide in raw material source is realized. The chemical reactions between plant polyphenol procyanidine compounds and the amino-containing hydrophobic modifier are utilized, and an aqueous solution is adopted for reactions in the whole process, so that the low-cost, environment-friendly and green preparation of the super-hydrophobic oil-water separation material is realized; the shaddock peels are used as a base material, the waste materials are effectively recovered, and the shaddock peels are a biomass material and can be well degraded.

The invention discloses a preparation method of a superhydrophobic superlipophilic oil-water separation omentum modified by tannic acid. The invention uses natural polyphenol tannic acid and long-chain alkylamine to modify the surface of the omentum material, and at the same time realizes the "micro-nano structure" and "low surface energy" of the material surface, and prepares a super-hydrophobic The super-oleophilic oil-water separation membrane avoids additional surface microstructure construction process. The raw materials of the invention are easy to obtain, have wide sources, and the preparation process is simple. The prepared super-hydrophobic and super-oleophilic oil-water separation mesh has good selective permeation to oil substances, low processing cost, simple and convenient operation, and can be recycled and used for many times.

The invention discloses a method for preparing activated carbon from biomass waste. The preparation method comprises the following steps: (a) grafting 2-acrylamido-2-methyl-1-propanesulfonic acid onto the surface of biomass waste (b) a step of carbonizing the biomass waste treated in step (a) to obtain activated carbon. Compared with the existing technology, the biomass activated carbon prepared by this method not only has a good adsorption capacity for p-nitrophenol, which can reach more than 480 mg / g, but also can almost completely remove lead ions, chromium ions, nickel ions in water at the same time ions and arsenic ions, good cycle stability, more than 5 cycles, the adsorption capacity is still above 98%, it is a multi-functional comprehensive wastewater adsorbent.