46results about How to "Strong renewable" patented technology

The invention discloses a preparation method of a microwave-assisted magnetic hollow Zn/Co zeolite imidazole nanocage material. The preparation method comprises the steps: adopting Nano Fe3O4 as a seed crystal, adding cobalt nitrate hexahydrate and 2-methylimidazole and zinc nitrate hexahydrate successively, performing rapid self-assembly based on seed crystal induction so as to form a double-shell Zn/Co-ZIF crystal and form a magnetic double-shell nano crystal Fe3O4@ZIF-67@ZIF-8, utilizing methanol to absorb the microwave energy under the assistance action of microwaves, and transferring energy quickly to an inner shell ZIF-67 with poor chemical stability so as to bring vibration and cracking of metal organic skeleton ZIF-67 bonds, achieve etching of the inner shell and obtain Fe3O4@Zn/Co-ZIF. The material has a hollow cage-shaped morphology, a large specific surface area, a complete crystal form, multiple pores, high chemical stability and good magnetic properties for convenient magnetic separation. The material has an efficient and high-throughput adsorption for antibiotic quinolone drugs, has another advantage of easy separation from the antibiotic quinolone drugs, can be regenerated and reused at least 8 times, has excellent reproducibility, and has easy realization of high-efficiency removal of high-residue quinolone antibiotics in a large-scale water environment.

The invention belongs to the field of catalysts, and particularly relates to an environment-friendly catalyst for preparing propylene by directly dehydrogenating propane and a preparation method of the catalyst, wherein the particle size of the catalyst is 40-150 [mu] m; the catalyst comprises 30%-70% of a Zn-doped Hbeta molecular sieve, 15%-50% of Al2O3 and 3%-30% of a multi-element active modifier, wherein the modifier comprises at least one element of W, Mo, Mn, Zr, Ni, Fe and Co as a first modifier, at least one element of Ga, In, P, La and Ce as a second modifier, and any one element of Sr, Ba, Ca, Mg, Na and Li as a third modifier, and the sum of the mass percentages of oxides of all the element components is 100%. The prepared fluidized bed dehydrogenation catalyst is low in cost and good in wear resistance, and has good dehydrogenation activity and stability when used for propane dehydrogenation.

The invention provides a preparation method of a chitosan modified diatom-based As (V) ion imprinting material (IIP) and belongs to the field of ion imprinting materials. The chitosan modified diatom-based As (V) ion imprinting material takes diatom surface modifying chitosan as carriers and functional monomers and gamma-glycidyloxypropyltrimethoxysilane as crosslinking agent to prepare an As (V)identifiable absorbent. Diatom has absorptive properties and a large quantity of electronegative active sites on the surface, thereby being high in plasticity; DGTMS molecules can be polycondensated with Si-OH on the surface of the diatom and meanwhile has epoxy groups applicable to reaction with -NH2 on chitosan molecules; through covalent bond connected crosslinking reaction between the DGTMS and amino of the chitosan molecules, the DGTMS can be hydrolyzed for self-condensation and hydro-condensated with the Si-OH groups on the surface of the diatom for covalent bond connection, and the epoxy groups are ring-opened and covalent-crosslinked with the amino of the chitosan to form a high-density net-structured polymer.

The invention provides a nanometer lignocellulose/montmorillonite composite material and preparation and application thereof. The nanometer lignocellulose/montmorillonite composite material is an intercalation/stripping type nanometer composite material, and is compounded by nanometer lignocellulose and montmorillonite according to a mass ratio of 1:(1 to 10); the nanometer lignocellulose is intercalated into sheets of montmorillonite. The nanometer lignocellulose/montmorillonite composite material has the advantages that the nanometer lignocellulose/montmorillonite composite material is a novel heavy metal ion wastewater absorbent with low cost, good biocompatibility and high efficiency; the preparation method is simple, the regeneration property is good, the environment-friendly effect is realized, and the like; the obvious affinity and adsorption selectivity on the heavy metal ions in the wastewater are realized.

The invention relates to a metalworking fluids filtration system. The filtration system comprises a box body, equipment arranged in the box body and a bottom support, wherein the equipment in the box body includes a vacuum filtration system, a precision filtration system, a fluid storage system, a pumping system and an intelligent control system; the fluid storage system comprises a first fluid storage box and a second fluid storage box; the pumping system comprises a first pumping system and a second pumping system; the first fluid storage box is connected with a first drug bucket by fluid purification and sterilization equipment; the second fluid storage box is connected with a second drug bucket; sterilization drugs are filled in the second drug bucket and are finally output by the second pumping system to be recycled. The filtration system can purify cutting fluid periodically and continuously, not only better maintain the usability of the cutting fluid but also prolong the service life of the cutting fluid by many times, carry out quick filtration and efficient operation and achieve the aims of safety, environment-friendliness, saving and emission reduction at minimal cost.

The invention relates to block-shaped nano-scale antibacterial medical porous titanium-magnesium skeleton material and a preparation method thereof and particularly relates to a method for preparing anano-scale producible antibacterial medical porous titanium-magnesium skeleton material through the combination of a high-pressure torsion method and a powder metallurgy method. The mass fraction ratio of magnesium to zinc to calcium to potassium to silver to silicon to phosphorus in the skeleton material is (12%-16%) to (0.1%-0.4%) to (2.5%-3.2%) to (0.5%-0.8%) to (0.8-1.4%) to (23%-27%) to (0.5%-1.3%), and the rest is metallic titanium. The method comprises the following steps: determining the weight of metal powder in a single torsion pressure process at 20g-500g; adjusting the following parameters in the torsion pressure process: the torsion torque of a torsion head is 800Nm-1500Nm, the rotation speed of the torsion head is 1r/min-5r/min, the single torsion pressure time is 10-30 minutes, and the torsion pressure number of times is 2-6; adding a proper amount of a 4% sodium hydroxide solution, and carrying out chemical corrosion for forming holes; and heating to 380-400 DEG C, andsintering. The material prepared by virtue of the method can be used as a medical skeleton material.

The invention discloses a calcium ion imprinted chitosan adsorbent, and a preparation method and applications thereof. The method includes adding chitosan into an acetic acid solution to obtain a chitosan solution through uniform mixing; adding acrylic acid, a template agent and an initiator into the chitosan solution, and performing heating stirring under the protective atmosphere so that a mixedliquor can be obtained; adding a glutaraldehyde solution into the mixed liquor, and performing uniform mixing, heating treatment, centrifugation and sediment taking, washing and drying; and performing elution treatment on the sediment so that the calcium ion imprinted chitosan adsorbent can be obtained. The method prepares the modified chitosan nano adsorbent with strong mechanical strength and good adsorption performance by taking calcium ions as a template, taking glutaraldehyde as a cross-linking agent and taking acrylic acid as a grafting agent. The provided imprinted chitosan adsorbent has advantages of being simple in preparation, uniform in particle sizes of the adsorbent, large in specific surface area, good in adsorption effect and strong in target ion selectivity, and can be desorbed, regenerated and reused; and the imprinted chitosan adsorbent can effectively realize the removing of heavy metal ions.

The invention discloses an ecological restoration method of zinc-cadmium heavy metal contaminated soil. The mode of moso bamboo and sedum plumbizincicola intercropping is adopted, the root growth layers of the two plants are crossed, thus the obvious nutrient competition relation does not exist, the root depths of the two plants are different, and thus the characteristics of fertilizers needed bythe two plants are also different. The root of the sedum plumbizincicola is generally located on the soil surface layer, when the depth of the contaminated soil reaches 30-40 cm, zinc-cadmium heavy metal in the soil cannot be absorbed by the root of the sedum plumbizincicola, but the depth of the root of the moso bamboo can reach 30-40 cm and conduct heavy metal ecological restoration on the soilbelow the surface layer of the contaminated soil.

The invention discloses a thiosemicarbazide functionalized graphene oxide/chitosan composite adsorbent as well as a preparation method and application thereof. The method comprises the following steps: dispersing chitosan in an acetic acid solution; dispersing the graphene oxide in water, and then adding the obtained dispersion into the chitosan dispersion liquid; adding thiosemicarbazide into the dispersion liquid, performing stirring treatment, then adding glutaraldehyde into the dispersion liquid, and reacting under stirring; and adding the mixed solution into a NaOH solution while stirring, centrifuging, washing and drying to obtain the adsorbent. The functionalized graphene oxide/chitosan composite adsorbent provided by the invention has the characteristics of simplicity in preparation, high yield, adsorption selectivity to Hg<2+>, easiness in separation and recovery and the like. The modified graphene oxide/chitosan composite adsorbent can effectively adsorb and remove heavy metal ions.

The invention belongs to the technical field of new materials, and particularly relates to a new-type wood adhesive and a preparation method thereof. The new-type wood adhesive is formed by a main adhesive and a cross-linking agent, wherein the main adhesive comprises the following raw materials in parts by weight: 12-16 parts of polyether glycol, 20-25 parts of silica sol, 8-12 parts of polyvinylalcohol, 0.2-0.4 parts of propylene glycol, 4-6 parts of polymerized diphenylmethane diisocyanate, 0.04-0.06 parts of polyacrylamide, 0.12-0.16 parts of dibutyltin dilaurate, 0.05-0.2 parts of a surfactant, 0.05-0.15 parts of a defoamer, 0.1-0.2 parts of a preservative, 8-15 parts of filler and 50-65 parts of water; and the cross-linking agent is formed by the following raw materials in parts byweight: 6-8 parts of vegetable oil, 20-30 parts of polyol benzoate and 65-75 parts of isocyanate. The preparation method is capable of using glycerinum as an initiator for preparing the polyether glycol, and using the polyether glycol as the raw material for preparing the new-type wood adhesive. The prepared new-type wood adhesive has the characteristics of high bonding strength, short curing time, good water resistance and weather resistance and environment-friendliness, and has a value of large-scale promotion.

The invention discloses a preparation method of a hydrophobic antibacterial ceramic membrane. The preparation method comprises the following steps: S1, cleaning a ceramic membrane; S2, preparing a cuprous oxide/fluorosilicone modified hydrophobic antibacterial modification solution; S3, putting the ceramic membrane obtained in the step S1 into the modified hydrophobic antibacterial modification solution obtained in the step S2, dipping and adsorbing for 3-5 minutes, and lifting upwards at the speed of 750-1000 [mu]m/s, so as to enable the hydrophobic antibacterial modification solution to flow out from one end of the ceramic membrane; and S4, drying and curing the ceramic membrane obtained in the S3 at the temperature of 40-50 DEG C to obtain the hydrophobic antibacterial ceramic membrane. The cuprous oxide/fluorosilicone modified hydrophobic antibacterial modification solution is used for surface treatment of the ceramic membrane for the first time, so that the ceramic membrane is endowed with excellent hydrophobic, oleophobic, antifouling and antibacterial properties; the aggregation amount of organic suspended matters, colloids, microorganisms and the like on membrane pore passages or the surface of the membrane is effectively reduced.

The invention discloses a composite carrier catalyst for preparing propylene by adopting propane conversion and a preparation method for the composite carrier catalyst. The catalyst is prepared from 50%-90% of Al-doped SBA-15 molecular sieves, 10%-40% of iota-Al2O3, 0.1%-0.6% of an active component, 0.1%-4.0% of modifiers and the balance adhesive. The modifier comprises a first modifier containingany one of Cu and Sn modified elements, a second modifier containing any one of La, Ce, Ag and Zr modified elements, and a third modifier containing any one of Sr, Ba, Ca and K modified elements, thecontent of each modifier is greater than 0%, and the mass percentage sum of all the components is 100%. The catalyst is good in intensity, and has good dehydrogenation activity and stability in the process of propane dehydrogenation.

The invention belongs to a synthesis method of an ester type compound in organic chemistry and in particular relates to a method for synthesizing dialkyl carbonate from biomass-based furfural. The method comprises the following steps: firstly, taking agricultural and forest wastes as initial raw materials, carrying out acid hydrolysis and dehydration cyclization reaction and purifying to obtain furfural; carrying out oxidization reaction on the biomass-based furfural under the action of hydrogen peroxide and a catalyst to synthesize maleic anhydride; carrying out epoxidation reaction on the synthesized maleic anhydride under the action of the catalyst and the hydrogen peroxide to synthesize epoxysuccinic acid; carrying out cycloaddition reaction on the epoxysuccinic acid and CO2 to prepareannular carbonate; finally, carrying out ester exchange reaction on the synthesized annular carbonate and monohydric alcohol or polyhydric alcohol to prepare the dialkyl carbonate. According to the method provided by the invention, the cheap agricultural and forest wastes are used as the raw materials to produce the dialkyl carbonate; meanwhile, tartaric acid with high additional value is also produced; the production cost is saved and the environment pollution is reduced; a novel way is also provided for industrial production of the dialkyl carbonate and the tartaric acid and efficient and comprehensive utilization of the agricultural and forest wastes; the synthesis method has remarkable economic benefits and social benefits.

The invention provides a composite molecular sieve which is composed of transition metal and a molecular sieve, and the transition metal exists in a molecular sieve framework in a monodisperse tetrahedral coordination form. The composite molecular sieve provided by the invention is a transition metal composite molecular sieve containing a single-site framework confinement. The invention also provides a preparation method of the low-carbon olefin. According to the preparation method, low-carbon alkane is dehydrogenated on the catalyst to generate the low-carbon olefin and hydrogen. Experiments prove that the selectivity of the low-carbon olefin prepared by the method disclosed by the invention can reach 99.9%. The method is simple in process and simple and convenient in reaction equipment; the composite molecular sieve catalyst has the advantages of acid and alkali resistance, oxygen and sulfur resistance, water resistance, carbon deposition resistance, long service life, high reaction activity and product selectivity, and suitableness for industrial production.

The invention discloses an antibacterial nano cuprous oxide/chitosan grafted polyacrylate emulsion as well as a preparation method and application thereof. The polyacrylate emulsion is prepared from the following raw materials in parts by mass: 40 to 60 parts of methyl methacrylate, 5 to 8 parts of acrylic acid, 10 to 15 parts of a fluorine-containing acrylate monomer, 5 to 10 parts of vinyl polysiloxane, 4 to 8 parts of nano cuprous oxide, 3 to 6 parts of vinyl trimethoxy silane, 10 to 15 parts of carboxymethyl chitosan, 1 to 3 parts of polylysine, 2 to 3 parts of EDC.HCl, 0.4 to 1 part of an initiator, 50 to 60 parts of N-methyl pyrrolidone and 40 to 50 parts of deionized water. The preparation method comprises the following steps: S1, preparing modified nano cuprous oxide; s2, preparing a reaction solution I; s3, preparing a reaction solution II; and S4, preparing the nano cuprous oxide/chitosan grafted polyacrylate emulsion. According to the invention, vinyl trimethoxy silane is used for modifying nano cuprous oxide for the first time, acrylic acid reacts with carboxymethyl chitosan and polylysine to introduce C = C, and then the product is further copolymerized with other monomers, so that polyacrylate is endowed with excellent hydrophobic, oleophobic, antibacterial and self-cleaning properties.