798results about How to "Improve decomposition rate" patented technology

The present invention relates to a method and apparatus for removing and recovering metal such as copper from various kinds of waste water containing copper. A method for treating waste water includes treating waste water in a copper treatment step (10) comprising a combination of electrodialysis operation and electrolytic deposition operation to produce treated water (107) having a lowered copper concentration, and recovering copper from the waste water.

The invention provides a method for extracting tungsten from scheelite and producing high-quality calcined gypsum, comprising the following steps: adding a mixed acid of phosphoric acid and sulphuric acid to decompose scheelite; and after decomposition, adding hydrated gypsum seed crystals to finish the dewatering conversion process of dihydrate gypsum to obtain hydrated gypsum with good properties. The invention has the following advantages: the efficient atmospheric pressure leaching of scheelite is realized, the resource and energy consumption is saved, and the decomposition rate of scheelite can reach over 98%; the serious problems of Cl<-> corrosion and HCl volatilization in the traditional acid decomposition process can be overcome; the recycling of phosphoric acid is basically realized, and the leaching cost and the wastewater discharge are greatly reduced; the leaching device is simple, the operation is convenient and industrialization is easy to realize; the obtained byproduct gypsum has pure quality and can be used to produce gypsum boards, and can be used in retarder, plaster and the like produced by using cement; and due to the recrystallization process, the P2O5 content in gypsum is further reduced to below 0.5%.

The invention provides a method for recovering fiber from an epoxy resin/fiber composite material, which comprises the following steps: mixing the first epoxy resin/fiber composite material with reaction mother liquor for obtaining a first mixed material; heating the mixed material for decomposing the first epoxy resin/fiber composite material; and recovering the fiber from decomposition products of the first epoxy resin/fiber composite material, wherein the reaction mother liquor comprises phenolic compounds, water and a catalyst; and the catalyst in the reaction mother liquor is an alkali metal hydroxide. The method adopts the solvent decomposition method for decomposing the epoxy resin/fiber composite material without the need of carrying out breaking or smashing and other pretreatment on the epoxy resin/fiber composite material, thereby reducing the impacts on the mechanical properties of the fiber, reducing the loss of the mechanical properties of the fiber, being more conductive to carrying out plastic injection molding, hot compression molding or making into non-woven fabric for further application. Simultaneously, the method provided by the invention can realize higher decomposition efficiency of resin and lower cost.

A high-temperature and aerobic composting method for solid wastes which adopts a vertical ventilation device relates to a high-temperature and aerobic composting method for the solid wastes. The composting method aims at solving the problems that in the aerobic fermentation process, the conventional bottom ventilation method causes obvious uneven fermentation at the upper part and the lower part of a stacking body in a fermentation device, thus quality stability and uniformity of the fermented product are affected. In the composting method, middle air distribution pipes are fixed in a fermentation tank arranged at the lower side of an inverted ventilating slot; both the bottom part and the middle part of the fermentation tank adopt intermittent ventilation type, the ventilation time is 5-30 minutes, intermittent time is 15-120 minutes and ventilation rate is 0.03-2m<3>/(min m<3> mixing materials). The composting method increases the contact area between air and materials; air direction forms a reverse rotational flow, which increases residence time of fresh air in the fermentation device, thus improving the mass transfer efficiency, and the operational cycle of a single fermentation is shortened by over 1/4.

The invention belongs to the field of building heat-insulating materials, and particularly relates to a production method for a water-proof inflammable coal ash/metakaolin-based insulation board. According to the preparation method, aggregate is metakaolin and coal ash, and polymerization is performed under the activation of an alkali activator, so that the hydration reaction efficiency of a geopolymer is increased greatly; a foaming agent is aluminum powder, so that the decomposing rate and foam producing amount are increased greatly in an alkaline environment, cost is lowered, and high economic efficiency is achieved. A selected polystyrene material has high density, high heat-insulation efficiency and a good waterproof effect. Moreover, reaction conditions are relatively mild, a reaction is easy to control, operation is easy, and the whole process flow meets the requirement of environmentally-friendly production. The prepared heat-insulating material has the advantages of light weight, high strength, good heat-insulation effect, superior waterproofness and inflammability.

A lithographic printing plate precursor comprising: a support; and an image recording layer containing (A) an infrared absorbing agent, (B) a polymerization initiator, (C) a polymerizable compound and (D) a compound having a carboxylate group and being removable with at least one of a printing ink and a fountain solution.

The invention discloses an inner-electric-arc plasma torch for gasifiers and relates to plasma heating equipment. The inner-electric-arc plasma torch is mainly composed of a front torch body, a rear seat, a first electrode and a fourth electrode, an arc cavity and a cooling water jacket are structured in the front torch body, an inlet and a compression nozzle are respectively arranged in two ends of the arc cavity, the cooling water jacket is arranged on the outer side of the arc cavity, and the head of the first electrode is arranged out of the arc cavity of the front torch body and is close to the inlet; the head of the fourth electrode (8) extends to the compression nozzle side in the arc cavity through the compression nozzle, a metal component at the position of the compression nozzle forms a third electrode, a second annular discharging surface is arranged on the third electrode, a metal component at the position of the inlet forms a second electrode, and a first annular discharging surface is arranged on the second electrode; or the head of the fourth electrode further extends to the arc cavity from the compression nozzle and is close to the inlet, and the metal component at the position of the inlet forms an auxiliary electrode. By the inner-electric-arc plasma torch, water vapor can be heated and decomposed in the arc cavity, energy is concentrated on water molecules, and the water molecules are easier to decompose.

The invention discloses a system and a method for energy conservation and discharge reduction in a synthesis gas produced in a fixed bed and gas making heater, which solves the problem of a large production of byproduct steam and waste gas from raw material. The system for energy conservation and discharge reduction in a synthesis gas produced in a fixed bed and gas making heater of the invention includes a fixed bed and gas making heater provided with a jacket, wherein insulating refractory material is bushed at an annular area of an inner wall of the gas making heater jacket; material which is resistant to high temperature, wear, thermal shock, slagging and flame is masonried or injected in the annular area of the inner wall of the insulating refractory material and is closed to a hearth; the method of the invention is: 1) raising the wall temperature around a gasification area of the hearth of the gas making heater to over 1000 DEG C; 2) reducing the mixing space of blowy wind and water gas in the gas making heater outside of the heater. The invention has the advantages that by adopting the composite heat insulation and slagging resistant material to be masonried around the gasification area of the hearth of the gas making heater, the surrounding wall temperature reaches over 1000 DEG C, thus reducing the amount of the byproduct steam of the water jacket, lowering slag and carbon residue from the gas making heater, and improving steam resolution ratio of the gasification.

A pressure-sensitive adhesive composition for an optical film of the present invention comprises 100 parts by weight of a (meth)acrylic polymer comprising 45 to 99.99% by weight of an alkyl (meth)acrylate monomer unit and 0.01 to 2% by weight of a tertiary amino group-containing monomer unit; and 0.01 to 2 parts by weight of a peroxide as a crosslinking agent. The pressure-sensitive adhesive composition can form an pressure-sensitive adhesive layer that has satisfactory reworkability such that optical films can be easily peeled from liquid crystal panels with no adhesive residue and also has satisfactory processability such that it can be worked without pressure-sensitive adhesive fouling or dropout.

The present invention relates to the field of air purification materials, in particular to a preparation method for micro-nano silver loaded active carbon for eliminating formaldehyde for a long term under a room temperature condition. The present invention provides the preparation method for micro-nano silver loaded active carbon for eliminating formaldehyde for a long term under the room temperature condition. The preparation method comprises the following steps of active carbon washing, ammonia water impregnation modification and micro-nano silver loading. Compared with the prior art, the formaldehyde purification material provided by the present invention is prepared from the loaded micro-nano silver component by taking the active carbon washed by ultrapure water and treated by the ammonia water as a carrier; and by utilizing adsorption and reduction of the active carbon, catalytic oxidation performance of the micro-nano silver to the the formaldehyde and an enrichment conversion cooperation mechanism between the micro-nano silver and the active carbon, the micro-nano silver loaded active carbon is high in decomposition rate of catalyzing and oxidizing the formaldehyde and is stable in performance.

The invention discloses an organic active fertilizer with a soil improving effect, and a production method thereof. The organic fertilizer mainly comprises animal dung, sludge, scorched earth, straws, traditional Chinese medicine meal, vinasse, biogas residues, internal organ powder, sweet potato root tuber, composite vegetable fibers, oil residues, ammonium humate, modified bentonite, dolomite and a compounded functional inoculant. The organic fertilizer prepared through improving the material proportions and a making technology has the advantages of improvement of the decomposition rate of organic matters, improvement of the dispersion of the organic matters in soil, improvement of the output of crops, improvement of the soil conditions and the crop quality, enhancement of the disease resistance of the crops, and effective solving of the problems of low decomposition rate, low utilization rate and agglomeration of organic fertilizers.

The invention relates to a method for preparing calcium oxide and sulfur from gypsum. The method comprises the following steps: (1) pretreating gypsum: drying dihydrate gypsum to form a dehydrated gypsum with the total water content of 2-10%, grinding the dehydrated gypsum into a gypsum powder; (2) decomposing the gypsum: enabling the gypsum powder in the step (1) to be in contact with a sulfur-containing process gas, reacting at the temperature of 700-1200 DEG C, and finally generating calcium oxide and a sulfur dioxide gas; (3) reducing the sulfur dioxide: enabling the prepared sulfur dioxide gas to be in contact with a carbonaceous reducing agent, reacting at the temperature of 600-1000 DEG C, and generating a sulfur-containing process gas. The sulfur-containing process gas is divided into two strands, one is used for the decomposition reaction of the gypsum in the step (2), and the other is used for producing sulfur through the processes of condensation, catalytic reaction, pelleting and the like. The conversion rate of the gypsum is high, the gypsum is consumed to produce the high value added calcium oxide and sulfur, the source of raw materials is wide, the energy consumption is low, and excellent environmental protection benefit and economic benefit are achieved.

There is provided a dispersing emulsion excellent in storage stability and mechanical stability, particularly an asphalt modifier of an water based dispersing emulsion, which can be mixed with a hot asphalt or an asphalt emulsion, and can improve rutting resistance, toughness, and flexibility at a low temperature without losing workability. There is provided a dispersing emulsion of a thermoplastic elastomer, which is emulsified and dispersed in the presence of at least one nonionic emulsifier selected from the group consisting of a styrenated phenol poly(alkylene oxide), a poly(alkylene polyamine) poly(alkylene oxide), polyalcohol fatty acid esters, polyalcohol fatty acid esters poly(alkylene oxide), and a benzylated phenol poly(alkylene oxide).

This invention relates to a three-stage two-seed seed crystal decomposing process. The process comprises: passing the mother liquor through an agglomeration decomposer and a seed crystal growth decomposer in order, adding decomposing seed crystal into the seed crystal growth decomposer, then passing through a reinforced decomposer, adding fine seed crystal into the reinforced decomposer, sending the overflow liquid of the reinforced decomposer to a leaf filter to obtain decomposed mother liquor, recovering fine seed crystal from the leaf filter, returning to the reinforced decomposer, returning seed crystal from the reinforced decomposer to the agglomeration decomposer, and sending part of the mother liquor via the seed crystal growth decomposer to the reinforced decomposer for circulation. The process has such advantages as reasonable procedures, low energy consumption, low cost, easy control, high decomposition rate and high product quality.

A vegetation protective soil base material activation method is applied to the fields of ecological slope protection project, ecological restoration project and side slope and landscape garden greening project and the like. The method includes that concrete greening additive, organic matter, cement and activation substance are fully mixed to be uniform and then mixed into soil base material, and a spraying and sowing machine is adopted to spray activation substance on side slope finally, wherein the activation substance is obtained by combination and activation of three microbial inoculum fertilizers of nitrogen-fixing microbial inoculum fertilizer, phosphate-dissolving microbial inoculum fertilizer and silicatebacterium fertilizer. The vegetation protective soil base material activation method provided by the invention provides growth environment for plants in concrete and is beneficial to side slope greening plant growth. Meanwhile quantity of microorganism in slope protection base material is increased, and soil nutrient activation speed is improved by utilizing decomposition of microorganism on organic matter and release action of microorganism on mineral element, thus improving soil aggregate, improving soil fertility and effectively promoting side slope restoration.

The invention relates to a method for preparing high-purity magnesium oxide by pyrolysis of magnesium chloride. The method comprises the following steps of: (1) dissolving salt lake bischofite or old brine, and then removing B2O3 and SO2<-4>, so as to obtain a magnesium chloride solution with the mass concentration of 29-32%; (2) preconcentrating the magnesium chloride solution, spraying the preconcentrated magnesium chloride solution into a pyrolysis reactor by virtue of a nozzle, decomposing under the conditions that the decomposition temperature is 500-650 DEG C, the pressure is -80 to -20Pa and the decomposition time is 1-5 seconds to obtain themolysis products of magnesium oxide and themolysis tail gas; and (3) sintering the pyrolysis product magnesium oxide sequentially subjected to hydration purifying, washing and filtering to obtain high-purity magnesium oxide with the MgO content of more than 99.0%. The invention has the advantages of simple process, low cost, high raw material decomposition rate, short decomposition time, high thermal efficiency and high thermal utilization ratio.

This invention discloses a method for preparing calcium sulfate whiskers and phosphoric acid. The method comprises: phosphate ore decomposition, slurry filtration and separation, calcium sulfate whisker crystallization, separating, washing and drying. The method adds composite additive A during the during phosphate ore decomposition process, and adds composite additive B during calcium sulfate whisker crystallization process to form calcium sulfate whiskers and phosphoric acid. Composite additive A is composed of humic acid and diatomite at a ratio of 1:(2-10). Composite additive B is composed of sodium dodecyl sulfonate and sulfate or phosphate of magnesium and aluminum at a ratio of (2-5):1. The addition amount of composite additive A is 0.5-5.0% of phosphate ore. The addition amount of composite additive B is 0.1-2.0% of theoretical formation amount of calcium sulfate whiskers. The method has such advantages as adequate utilization of raw materials, low solid waste discharge amount, and low production cost.

The invention discloses roxburgh rose fruit wine and a making process thereof. The roxburgh rose fruit wine is prepared from roxburgh rose through the steps of raw material pretreatment, enzymolysis, blending, yeast activation, fermentation, mixing, ageing, clarification, filtering, filling, sterilization and the like. According to the making process, the roxburgh rose is diced and is put into high-alcohol-concentration white wine to be soaked, so that the loss of nutrient substances is avoided; the soaked roxburgh rose is pulped and is subjected to compound enzyme treatment, so that more nutrient substances can be separated from the roxburgh rose, and the utilization efficiency of the roxburgh rose is improved; by carrying out clarification by virtue of a compound clarifying agent after ageing, the finished roxburgh rose fruit wine has stable color and soft taste, is transparent and further has multiple health efficacies of promoting digestion, tonifying spleen, converging and stopping diarrhea, clearing summer-heat, enhancing physique, and the like.