210results about How to "Improve complexation ability" patented technology

The invention relates to a heavy metal contaminated soil remediation agent, application thereof and a contaminated soil remediation method. The heavy metal contaminated soil remediation agent comprises, by weight, 50-80 parts of sludge, 20-30 parts of biochar, 12-20 parts of organic matter, 10-20 parts of plant ash, 5-10 parts of montmorillonite clay, 5-10 parts of ferroferric oxide, 2-5 parts of sodium chloride and 3-8 parts of sodium phosphate, and preferably, the remediation agent further comprises 1-3 parts of humic acid. The invention further provides application of the heavy metal contaminated soil remediation agent and the contaminated soil remediation method. The heavy metal contaminated soil remediation agent avoids secondary pollution generated during heavy metal contaminated soil remediation, the remediation period is shortened, and the remediation effect is good.

The invention discloses a preparation method of a debranched starch-lipid compound, and belongs to the technical field of modified starch processing. The method comprises the following steps: taking starch as a raw material, carrying out de-branching modification on the starch by adopting a de-branching enzyme, carrying out structural modification on the starch so as to improve the complexing capacity of the starch, and preparing the debranched starch-lipid compound in a water phase system by taking lipid as a ligand. Ordinary starch is used as a raw material; the debranched starch-lipid compound is prepared through enzymatic hydrolysis, de-branching modification and lipid complexing, the debranched starch-lipid compound and common starch interact with each other, the content of digestion-resistant starch in the product is greatly increased and can reach 39% at most, and the debranched starch-lipid compound has good effects of reducing blood sugar and benefiting intestinal tracts, hasa higher resistant starch content compared with that of a high-amylose corn starch-lipid compound, and is lower in cost.

The invention relates to a metal ion adsorption sewage separation membrane preparation method. The method comprises the steps: firstly, utilizing polyphenol compound to modify oxidized graphene, thenpreparing the oxidized graphene, polyvinylidene fluoride, a pore forming agent and an organic solvent into a membrane casting solution and finally utilizing a solution phase conversion film forming method to cure the membrane casting solution into films. The oxidized graphene and the polyphenol compound utilized by the preparation method disclosed by the invention contain more hydrophilic oxygen-containing functional groups and have the characteristics of generating chelating reaction with metal ions, so that the membrane can separate sewage and adsorb metal ions at the same time. The metal ion adsorption sewage separation membrane prepared by the method can be cleaned and used again after adsorption finishes, so that secondary pollution is avoided; meanwhile, valuable metal can be recycled by the metal ion adsorption sewage separation membrane.

The invention discloses a preparation method of a low-mercury compound catalyst for producing vinyl chloride, which relates to the catalyst which contains metallic mercury and nickel, and comprises the steps that: firstly a coaly carbon carrier is soaked in aqua regia, and simultaneously flows back in the aqueous solution of triethylamine, is stirred and pre-treated; then surfactant hexadecyltrimethylammonium chloride and additive nickel chloride are added by the mass ratio that hexadecyltrimethylammonium chloride: HgCl2 is 2.85 to 7.65: 4 to 6.5 and NiCl2: HgC12 is 4:4 to 6.5, and impregnated in a vacuum rotary evaporation way, wherein the prepared HgCl2 accounts for 4 percent to 6.5 percent of the total mass of the catalyst and NiCl2 accounts for 4 percent of the total mass of the catalyst, the hexadecyltrimethylammonium chlorid accounts for 2.85 percent to 7.65 percent of the total mass of the catalyst, and the balance is the low-mercury compound catalyst of C, so that the activity, stability and selectivity of the low-mercury compound catalyst are also significantly improved while the mercury content is reduced.

The invention discloses an alkali-free liquid accelerator and a preparation method thereof, and relates to the technical field of concrete admixtures. The technical solution main point is that the alkali-free liquid accelerator comprises the following components in parts by weight: 45-55 parts of polyaluminium sulfate, 3-5 parts of an organic acid, 0.5-1 part of an inorganic acid, 2-4 parts of a stabilizer, 1-2 parts of an early strength agent, 1-2 parts of a thickener, and 40-50 parts of water. By combination of polyaluminium sulfate with the organic acid, the inorganic acid and the stabilizer, the prepared accelerator has the advantages of low blending amount, good quick-setting effects and low strength loss.

The invention discloses a method for carrying out one-side copper plating on a wide stainless steel band and an electroplating bath. The method comprises the following steps: carrying out oil removal and activation on the pre-plating surface of the stainless steel band of a substrate; carrying out nickel pre-plating and general nickel plating on the activated pre-plating surface of the stainless steel band of the substrate, and carrying out copper plating in an alkaline cyanide-free plating solution; passivating and drying the copper-plated stainless steel band. The improved electroplating bath is adopted in the copper plating process, at least two transmission rotary rollers are hermetically mounted on two groove walls at a transmission inlet and a transmission outlet of the electroplating bath respectively, and the electroplating bath can be used for guaranteeing the liquid level of the bath and preventing a plated layer of the stainless steel band from being scratched and is especially suitable for continuous one-side copper plating of the wide band-shaped stainless steel band. The method is safe, environment-friendly, low in cost and capable of carrying out high-speed one-side copper plating on the wide stainless steel band; the one-side plated layer of the stainless steel band, prepared by the method, is uniform, bright and compact in surface, good in corrosion resistance, high in electric conductivity and excellent in stamping resistance, meets the requirements of electronics and military industry, and can be industrially produced.

The invention belongs to the technical field of water treatment and particularly relates to a preparation method of a composite modified fluoride-removing adsorbent. The method comprises the steps of crushing and calcining an animal bone as a raw material and then washing to prepare hydroxyapatite powder with a porous structure; preparing an aluminum-based sol by using aluminum sulfate, loading the aluminum-based sol on the hydroxyapatite powder, wherein the specific surface area of the natural porous hydroxyapatite powder is further improved and the adsorption capacity is improved and can reach 120-130mg/g through the synergistic effect of the aluminum-based sol and organic carbon among pores of the hydroxyapatite powder; preparing a solution from a rare-earth salt and a metal salt, and compounding rare-earth ions and metal ions through the synergistic effect of an aluminum base and hydroxyapatite under an alkaline condition, thereby further strengthening the electrostatic effect and strengthening the effects of lewis acid and base and the complexing action with fluoride ions and reducing the concentration of the fluoride ions in underground effluent to 0.9mg/L. The preparation method has the characteristics of being high in adsorption rate, easy to regenerate and stable in performance.

The invention relates to the technical field of food processing, in particular to a preparation method of zein-bee pollen extract microcapsules. According to the specific technical scheme, the preparation method comprises the following steps of taking a bee pollen extract as a core, taking zein as a shell, adding the bee pollen extract to a zein solution, performing ultrasonic dissolving, and performing dispersing so as to obtain a zein-bee pollen extract solution; and then performing granulation by an electrostatic spraying method so as to obtain the zein-bee pollen extract microcapsules. Through the preparation method disclosed by the invention, the problems that in the prior art, effective components cannot be released in the intestines and the stomach, prepared microcapsules are unevenin granules, and the encapsulation efficiency is low are solved.

The invention discloses shell powder and chitosan composite microspheres for absorbing heavy metals, and a preparation method of the shell powder chitosan composite microspheres. In the composite microspheres, the weight ratio of chitosan powder to shell powder is equal to 1 to (0.3-0.45). The preparation method comprises the steps of soaking shell into acid, washing, drying, calcining, and grinding into coarse shell powder; crushing the coarse shell powder to obtain nano shell powder; carrying out liquid drop molding on the chitosan powder and the shell powder, then carrying out crosslinkingmodification, cleaning up, and drying to obtain composite microspheres; adding the composite microspheres into a solution containing thiourea and epoxy chloropropane, and carrying out a reaction to obtain a composite microsphere product. The shell powder and chitosan composite microspheres provided by the invention combines the advantages of the shell powder and chitosan; due to the addition of the shell powder, not only is the mechanical stability of a chitosan carrier improved, but the complexing capability between the carrier and transition metals can be also improved, and the recycling ofthe heavy metals can be further realized; the microspheres prepared by the preparation method provided by the invention have high monodispersity, and are controllable in particle sizes, morphology, particle diameters and components, uniform in particle diameters and high in mechanical strength.

The invention relates to a preparation method of an ecological security flocculating agent for effectively removing phosphorus and algae in a eutrophic water body. The preparation method comprises the following steps of preparing materials, uniformly mixing original clay with water to obtain clay suspension, adjusting the basicity to 50-90% by dropping dilute acid into the clay suspension, uniformly mixing aluminium polychlorid powder with water to prepare aluminium polychlorid solution, adjusting the basicity to 50-90% by dropping dilute acid or dilute alkali into the aluminium polychlorid solution, pouring the aluminium polychlorid solution into the clay suspension, standing and curing at 50-80 DEG C to obtain curing solution, drying the curing solution at 50-80 DEG C, and crushing and sieving to obtain the flocculating agent. According to the invention, the removal rate of total phosphorus is 93% or more; the removal rate of CODCr is 53% or more; the removal rate of total nitrogen is also above 3%; the removal rate of water-blooming cyanobacteria is 96% or more; the removal rate of algal toxin MC-LR is 7% or more; and the risk in rapidly releasing algal toxin is not caused.

The invention discloses an attapulgite sewage treatment agent and a preparation method thereof, and relates to the technical field of attapulgite processing. The attapulgite sewage treatment agent is prepared from the following raw materials in parts by weight: 150 to 200 parts of attapulgite, 200 to 250 parts of hollow glass beads, 80 to 100 parts of deionized water, 20 to 25 parts of a sulfuric acid solution, 20 to 25 parts of cross-linked rectorite, 2 to 5 parts of ferric trichloride, 2 to 5 parts of ferrous sulfate, 2 to 5 parts of magnesium sulfate, 2 to 5 parts of polyacrylamide, 2 to 5 parts of aluminium chloride, 2 to 5 parts of polyferric sulfate, 2 to 5 parts of sodium hydroxide, 2 to 5 parts of sodium benzoate, 2 to 5 parts of corn starch, 2 to 5 parts of straw, 1 to 3 parts of cottonseed shell residue, 1 to 3 parts of modified diatomite, 1 to 3 parts of citric acid, 1 to 3 parts of aids and a proper amount of water. The attapulgite serves as the raw material and is subjected to modification treatment, so high dispersibility, high suspension property and good adsorption effect are achieved.

The invention relates to a preparation method of an enhanced polyacrylamide-series cement grinding aid. The method includes the following steps: performing a water solution free radical polymerization reaction to unsaturated acrylamide and an unsaturated polyether large monomer under the effects of an initiator and a chain-transfer agent, and then adding alkylbenzene sulfonate and modified alcohol amine to prepare the enhanced polyacrylamide-series cement grinding aid. The grinding aid belongs to high-molecular liquid polymer. By means of addition of active functional groups in the molecular chain, the grinding aid significantly increases early and later strength, increases grinding efficiency, improves cement performance and is simple in processes.

The invention provides a mercury-free and precious metal-free catalyst for preparing chloroethylene through acetylene hydrochlorination. The catalyst is prepared by loading a metallic element complex on a carbon carrier such as activated carbon, graphite, graphene or a carbon nano tube; and a ligand of the metallic element complex is a bidentate, tridentate, quadridentate, quinquidnetate or hexadentate ligand, wherein at least one ligating atom is a nitrogen atom which contains a double bond, and the complexing power of the ligand and metal elements is more than the complexing power of H<+1>.

The invention is applicable to the technical field of chemical materials, and provides a pyridine-ion-containing liquid, a preparation method and an application thereof. The pyridine-ion-containing liquid has a formula as shown in the specification. According to the invention, by introducing C-O ether bond into cation, the performance of the ionic liquid is greatly improved, and for one hand, the melting point of the ionic liquid is significantly reduced, and for the other hand, complexation ability of the ionic liquid with the lithium ion is improved in electrochemical applications. The preparation method of the pyridine-ion-containing liquid is simple to operate, low in cost and friendly to the environment, and is ideal for industrial production.

The invention discloses a restoration agent and a preparation method thereof and a method using the restoration agent to restore heavy metal-polluted soil, and belongs to the technical field of restoration of heavy metal soil pollution. The restoration agent is prepared from the following raw materials of biochar, sepiolite, monocalcium phosphate, sugarcane residues, lime powder, longan peel, tartaric acid, hydroxyethyl triphosphate, potassium lignosulphonate, malic acid, chitosan and soybean straw. The restoration agent is prepared by the following steps of powder preparing, fermenting, powder drying and the like. The restoration agent has the advantages that the preparation technology is simple; when the restoration agent is used for restoring the heavy metal-polluted soil, the removal rate of mercury, cadmium, lead, arsenic and pyrene is increased.

The invention relates to a processing technology of fried cakes of lotus roots. During the processing, lotus roots are firstly subjected to dip processing through citric acid and vitamin C, and then sodium hexametahposphate and sodium (potassium) citrate are added to perform subsequent processing. The processing technology adopts 0.03 to 0.5 percent of citric acid and 0.03 to 0.5 percent of vitamin C to control the pH of dipping liquid, so as to prevent the lotus roots from being oxidized and discolored, and 0.03 to 0.1 percent of sodium hexametahposphate and 0.05 to 5.0 percent of sodium (potassium) citrate are added to be resistant of oxidation, so as to prevent the lotus roots from being discolored during processing and cooking processes, and further, the natural dye-forming reaction of food reaches better effect during the frying process and products can properly embody characteristics of lotus roots, and color and flavor characteristics of lotus roots are obvious and different from those of other food. Sodium hexametahposphate and 0.05 to 5.0 percent of sodium citrate can prevent the brown stain of lotus roots at high temperature frying state, and metallic iron and manganese ion of sodium hexametahposphat and sodium citrate are generally believed to have strengthened complexing action and to prevent brown stain.

The invention belongs to the technical field of phenylfluorone compounds, and provides a 9,9'-(4,4'-biphenyl)bisfluorone bromination reagent, and a preparation method and an application thereof in order to solve the problem of unsatisfactory sensitivity and selectivity of reagents for detection of heavy metal ions in the prior art. 4,4'-Biphenyldicarboxaldehyde with a large conjugated system reacts with 1,2,4-trihydroxybenzene triacetate to synthesize the novel bisfluorone reagent with a larger conjugated system, so the sensitivity and the fluorescence characteristic of the reagent are enhanced. The 9,9'-(4,4'-biphenyl)bisfluorone bromination reagent can be used in detection of Mo (VI) ions under alkaline conditions and fluorescence detection of Mn (II). The reagent is a highly-selective and highly-selective fluorescence analysis reagent for detecting Mo (VI) and Mn (II), and is a luminosity analysis developer with a good analysis performance.

The invention discloses a bio-organic fertilizer for promoting the growth of a tea plant. The bio-organic fertilizer is prepared from the following raw materials in percentage by weight: 51-60 percent of livestock manure, 15-20 percent of vinasse powder, 0.3-0.5 percent of zymophyte, 8-10 percent of a calcium magnesium phosphate fertilizer, 6-10 percent of an oil cake, 0.3-0.7 percent of urea and 5-8 percent of chitosan. The invention also discloses a method for preparing the bio-organic fertilizer, and the method comprises the following steps: (1) uniformly mixing the livestock manure with the vinasse powder to form a mixed material; (2) adding the zymophyte into the mixed material for fermentation; repeatedly rolling over compost; evaporating water during fermentation to reduce the total weight of the hydrated mixed material by 50% to 70%; (3) adding the oil cake; stirring uniformly; stacking and fermenting for 10 to 20 days; adding the calcium magnesium phosphate fertilizer, the urea and the chitosan; stirring uniformly; stacking and ageing for 3 to 5 days; crushing to obtain the bio-organic fertilizer. The bio-organic fertilizer disclosed by the invention can effectively utilize various organisms and pure natural trace elements in the livestock manure. Under the effect of biological colony, physical and chemical properties of soil can be improved to promote the growth of tea, improve the tea quality and increase the tea yield.