76results about How to "Reduce heavy pollution" patented technology

The invention provides a method for producing biogas through high-solid two-phase three-stage anaerobic digestion by using perishable organic wastes, which comprises the following steps: the perishable organic wastes are hydrolyzed in a hydrolysis acidogenic reactor, and a mixture obtained after hydrolysis is acidified to generate a large number of organic acid products with low molecular weight; the bottom of the hydrolysis acidogenic reactor is communicated with the bottom of a methanogenic reactor through a circulation pump and a pipeline; the top of the methanogenic reactor is communicated with the top of the hydrolysis acidogenic reactor; and the acetic acid producing reaction is carried out in the methanogenic reactor and the methane producing reaction is continuously carried out. The invention can separate the hydrolysis acidogenic process from the acetic acid and methane producing process in the anaerobic digestion process so as to prevent organic acids generated by the perishable organic wastes from inhibiting methanogenesis. The device has simple processing procedure, low cost, easy maintenance and stable and reliable performance, is suitable for anaerobic digestion treatment of various perishable organic wastes, and has highly efficient and stable biogas production capacity of the perishable organic wastes through the anaerobic digestion.

The invention relates to a gypsum-based self-leveling material prepared by phosphogypsum, which comprises the following components by weight: 10-30% of modified phosphogypsum, 1-5% of cement, 30-60% of semi-hydrated gypsum, 0-15% of anhydrite, 2.0-4.0% of redispersible emulsion powder, 0.03-0.06% of water retaining agents, 0.10-0.30% of antifoaming agents, 0.2-1.0% of water reducing agents, 0.03-0.12% of retarders, and 20-30% of fine sand. According to the invention of the gypsum-based self-leveling material prepared by using phosphogypsum as a raw material, waste phosphogypsum can be made full use of; severe pollution of soil, water systems and atmosphere and land resource waste caused by phosphogypsum exposed stacking and discharging into the sea are reduced; the cost for the gypsum-based self-leveling material is reduced; and the prepared the gypsum-based self-leveling material has the characteristics of high strength, good fluidity, and low shrinkage deformation.

The present invention relates to chemical production apparatus, and especially apparatus for co-producing hydrogen and methane with biomass and solid organic waste and through fermentation. The apparatus includes a hydrolysis and acidifying reactor, a hydrogen generating organic acid reactor, methane generating reactor and material pumps connected together. The apparatus can reduce environmental pollution while producing clean energy source material, and has high energy source converting rate.

The invention provides a method for recycling industrial waste sulfate slag, which comprises the steps of sieving, stirring, magnetic separation, acid dipping, rinsing and drying to obtain iron-bearing materials. The method not only reallocates the available resource of the sulfate slag which is difficult to be processed and has high pollution, but also reduces the severe contamination of the sulfate slag to the environment and simultaneously lowers the production cost greatly; the metal recovery rate is 50 to 82 percent, high quality iron concentrate with the grade of iron being larger than 60 percent, the grade of sulfur being smaller than 0.3 percent and the grade of arsenic being smaller than 0.1 percent is obtained; simultaneously the recovery processing capacity is large, the equipment is simple, the investment is small, the operation is convenient, the sulfate slag material is not limited, both the sulfate slag with high iron content and the sulfate slag with low iron content can be recycled, and the method has good social benefit and remarkable economic effect.

The invention discloses a tanning agent with high flame-resistance amino-resin nano-composite function, which is prepared by the method as follows: firstly, melamine, dicyandiamide, formaldehyde and acidic components are used as raw material to prepare flame-resistance amino-resin prepolymer; secondly, montmorillonite or organic montmorillonite are modified by tetrakis hydroxymethyl phosphonium and silane coupling agents to obtain modified montmorillonite or modified organic montmorillonite; finally, the prepared flame-resistance amino-resin prepolymer and the obtained modified montmorillonite or the modified organic montmorillonite are processed through in-situ intercalation compounding reaction. The tanning agent not only has better tanning performance and retanning filling performance, but also brings good flame-resistance and washable migration resistance to leather goods, and the addition quantity is less, and the flame retardant efficiency is high.

The invention relates to an ardealite-based self-leveling material. he ardealite-based self-leveling material consists of the following materials in parts by weight: 40-80 parts of modified ardealite, 6-15 parts of semi-hydrated gypsum, 20-30 parts of admixture, 1-4 parts of re-dispersible latex powder, 0.10-0.30 part of a retarder, 0.20-1.0 part of a water reducer, 0.10-0.25 part of a water-retaining agent, 0.06-0.15 part of an antifoaming agent and 0.10-0.40 part of an air entraining agent. The ardealite-based self-leveling material has the beneficial effects that firstly, the waste utilization rate is high; secondly, the modifying process of the ardealite is high and the energy consumption is low; and thirdly, the performances of the self-leveling gypsum are improved by virtue of a reasonable proportion of various wastes, for example, CSH (Calcium Silicate Hydrate) phase can be generated by ardealite, carbide slag and coal ashes, so that the water resistance is effectively improved. Therefore, the ardealite-based self-leveling material had dual characteristics of circulation economy and low-carbon economy, and can be extensively applied to an industrial building and a civil building.

The invention discloses a purification method for artificial diamond. The purification method comprises the following concrete steps: 1, mechanical crushing: mechanically crushing an artificial diamond synthetic rod into fine grains; 2, sintering and oxidation: removing most graphite by using a gas phase oxidation process; 3, crushing and dissociation: recovering catalyst metal by using a magnetic process and carrying out shaking-table sorting of a part of pyrophyllite; 4, separation and purification: totally remove residual graphite by using a flotation process and removing residual pyrophyllite by using a water elutriation method; and 5, drying and sorting: carrying out drying and sorting to obtain artificial diamond of different grades. The purification method has the advantages that purification process is simplified; severe pollution of a strong acid solution used in traditional purification processes to environment is mitigated; environmental protection is realized; and generation of harmful gas in the process of purification is reduced, so the working environment of operators is improved and the health of the workers is guaranteed.

The invention discloses solid sulfur ash masonry mortar. The solid sulfur ash masonry mortar is characterized by comprising the following components in parts by weight: 200 to 490 parts of solid sulfur ash, 30 to 100 parts of lime, 410 to 770 parts of sand, and 0.1 to 0.5 part of water holding thickener. The solid sulfur ash is used as a main raw material for preparing the masonry mortar, so that solid sulfur ash slag discharged by a circulating fluidized bed can be fully utilized, waste of land resources and pollution to the natural environment when the solid sulfur ash is stacked in open air are reduced, meanwhile, the contractility of the masonry mortar is reduced, the water holding property of the masonry mortar is improved, the cost of the masonry mortar is reduced, and the practicability is strong.

The invention relates to an apple pomace microbial culture starter, its preparation method and a method for producing biological feed by the apple pomace microbial culture starter. The apple pomace microbial culture starter comprises 1-15% of candida, 1-15% of geotrichum candidum, 1-15% of Aspergillus niger, 1-15% of Aspergillus oryzae and 1-15% of bacillus subtilis. The method utilizes a pomace multi-bacterium synergistic biological fermentation technology. The feed culture starter contains acid-forming bacteria, cellulose decomposition bacteria, protein production bacteria and disease-resistant health care bacteria and through synergism of the bacteria, a pomace conversion utilization rate is improved, a digestion rate is improved, crude fiber content is reduced and crude protein content is improved. The biological feed prepared by the apple pomace microbial culture starter contains comprehensive nutrients, is green and safe, has a low cost and high benefits, substantially reduces hoof diseases of female animals bred in the feeding farm, improves a reproductive rate, is suitable for large scale and industical production and has a wide application prospect.

The invention provides a device for producing biogas by two-phase three-section anaerobic digestion of high solids of perishable organic wastes. The device comprises a hydrolysis acid-production reactor and a methane-production reactor, wherein the two reactors are connected with each other, and the bottoms of the reactors are communicated through a circulating pump and a pipe; the hydrolysis acid-production reactor is a solid infiltration bed reactor, the top is provided with a water distributor and a spray header, the middle-upper part is provided with a feeding port, the middle-lower part is provided with a perforated plate and a discharging port, the bottom is provided with a residue-discharging port, and infiltration fillers are arranged on the upper surface of the perforated plate; and the methane-production reactor consists of a filter filler bed and a fiber filler bed, wherein the filter filler bed is arranged on the lower part of the methane-production reactor, the filter filler bed is arranged on the upper part of the methane-production reactor, filter fillers are arranged in the filter bed, a fiber filler frame is arranged in the fiber filler bed, and the fiber filler frame is wound by fiber fillers. The device has the advantages of simple processing procedures, low cost, easy maintenance, stable and reliable performance and suitability for the anaerobic digestion treatment of various perishable organic wastes, and has the capability of producing the biogas in high efficiency and stably by the anaerobic digestion of perishable organic wastes.

The invention provides a new method for leakage detection of a Freon valve, and belongs to the technical field of valve supervision and inspection. Freon is input via a Freon control vale firstly, high-temperature high-voltage water vapor is input via a high-temperature high-voltage stream control valve then, a mixed gas of the high-temperature high-voltage water vapor and the Freon enters a checked valve, multipoint step-by-step air extraction is performed on the checked valve by using an air extracting device, the extracted mixed gas is cooled in an air cooling device firstly, gas-liquid separation is performed in a gas-liquid separation device subsequently, and, finally, a halogen detector performs detection at air outlet of the gas-liquid separation device. The usage amount of the Freon is reduced, and serious pollution caused by that total fluoride as a working medium performs detection is reduced; a leakage point is accurately located through detection for the tracer gas Freon, and the leakage grade is determined through the number of lit alarm indicating lamps; and the cooling and gas-liquid separation devices are increased, an influence of too high stream temperature is prevented, and inspection precision is improved.

The invention relates to a method for producing biodiesel from microalgae oil, particularly a method for producing biodiesel by catalyzing microalgae oil by an ultrasonic-assisted ionic liquid. The invention aims to solve the severe problems of low extraction efficiency, high cost and environmental pollution of reagents in the existing biodiesel preparation method. The method provided by the invention comprises the following steps: 1. preparing [BMIM]Cl, mixing the [BMIM]Cl and NaBF4 in a mol ratio of 1:1, adding acetone to react for 18-24 hours, filtering, and carrying out vacuum distillation to obtain an ionic liquid [BMIM]BF4; and 2. mixing the microalgae oil with methanol or ethanol, adding the mixture into the ionic liquid [BMIM]BF4, carrying out ultrasonic treatment for 20-50 minutes, extracting, collecting the supernatant solution, and carrying out vacuum distillation to obtain the biodiesel. The biodiesel yield of the invention is greater than 90%. The invention is applicable to the field of biodiesel preparation.

The invention provides a papermaking method by using vinasse fiber pulp. The method is characterized in that the disposal vinasse from the alcohol industry is regarded as raw material, the vinasse fiber pulp mainly containing the cellulose and hemicellulose used for papermaking is prepared through the steps of crushing and slag-removing, boiling, washing and rinsing and the like, the vinasse fiberpulp is mixed with the papermaking slurry prepared by the conventional paper raw material composed of wood, bamboo wood, rice straw, straw, reed, recovery waste paper and the like to prepare mixing papermaking slurry, the mixing papermaking slurry is sent to the paper machine to produce products, or the method that the vinasse fiber pulp is prepared by the vinasse as raw material and after dilution pulping, water distribution and slurry mixing the vinasse fibre pulp is sent to the paper machine to produce paper products is completely adopted. The raw material field of papermaking industry isdeveloped, the cost of papermaking production is greatly reduced, the austere problem that the environment pollution nuisance is caused by a lot of vinasse disposed from the alcohol industry is effectively solved, the method has substantial economic benefit and social environment benefit and good popularization and use prospect.

The invention provides a fly ash brightening method which comprises, mixing fly ash with calcium hydroxide solution, heating, stirring for modifying the surface of the fly ash, then cooling down the slurry, and letting in carbon dioxide to neutralize the remaining calcium hydroxide.

The invention discloses stainless steel, titanium and titanium alloy electromechanical blackening solution, and belongs to the filed of surface treatment electromechanical conversion. The electromechanical blackening solution is suitable for forming a uniform, reliable-bonding and high corrosion resistance black electromechanical conversion film on the surface of stainless steel, titanium and titanium alloy. The electromechanical blackening solution is mainly technically characterized in that: the electromechanical blackening solution consists of the following components in volume concentration: 10 to 30g / L manganous nitrate, 20 to 30g / L potassium dichromate, 20 to 30g / L ammonium sulfate and 10 to 20g / L boric acid; and in the blackening process, the temperature of the blackening solution is controlled to between 10 and 40DEG C, and the direct current intensity is controlled to between 0.1 and 0.5A / dm2; various raw materials in a formula are all above electroplating grade; and the electromechanical blackening solution has the characteristics of simple components, quick and convenient preparation, good commonality, stable film bonding, high corrosion resistance of the film, long-term storage and the like.

The invention discloses a method for reeling silk at low temperature by utilizing strongly alkaline electrolyzed water, falling into silk making technical field. The method includes subjecting common tap water to electrolytic treatment via water electrolyzer or electrolytic cell, to obtain strongly alkaline electrolyzed water with pH of 11.0-12.0; performing constant-temperature oscillation swelling soaking treatment on silkworm cocoon in strongly alkaline electrolyzed water at 60-80 DEG C directly for 5-10 min; and taking strongly alkaline electrolyzed water as reeling hot water bath, transferring the swollen silkworm cocoon to the reeling hot water bath at 40-70 DEG C, and immediately reeling silk, to obtain raw silk product. The inventive method performs reeling at low temperature, to improve product quality and save energy. The invention can realize industrial production of strongly alkaline electrolyzed water at low cost and high yield, high-efficiency low-cost recovery of sericin, and cyclic utilization of reeling waste water after simple purification treatment, to thereby avoid environmental pollution caused by a large amount of waste liquid.

The invention discloses a KS-corduroy-simulation double-needle bar fabric and a production method thereof and belongs to the field of textiles. According to the fabric, a corduroy fabric is combined with fashionable warp-knitting double-needle jacquard weave flannelette, by designing and improving a yarn threading mode, the made KS-corduroy-simulation double-needle bar fabric product is stable instructure and good in size stability, the fabric is not easily loosened, the plush height of the fabric is low, and the fabric is non-lodging, high in pressure resistance, good in straight effect andmoderate in weight per gram; the weight of a finished product can be controlled below 330 g / m<2>, compared with the corduroy fabric on a KS machine, the fabric has more full handfeeling, the softnessof the fabric is improved, the elastic feeling of the suede is improved, the fabric is non-lodging and high in wrinkle resistance, the shrinkage rate after water washing is small and is only about 2%generally, 4 widths of gray fabric can be produced at the same time, the production efficiency is improved, and the fabric is suitable for industrial application.

The invention discloses a method for producing uvioresistant nano self-cleaning automobile glass, and solves the technical problem to arrange a uvioresistant nano self-cleaning layer in the automobile glass production process. The method comprises the following process steps of: early-stage glass forming treatment, cleaning treatment, drying treatment, nano TiO2 masking liquid spraying treatment,drying and self-leveling treatment, high-temperature curing, hot bending and toughening treatment, and film coating and laminating treatment. The method has the advantages that: the process steps aresimple, and by combining the conventional automobile glass production method, the method can be implemented by reforming the conventional automobile glass production equipment.

The invention discloses a preparation method of a crop straw organic fertilizer containing poly-Y-glutamicacid. According to the method, crop straw is used as a base material, a microorganism strain is added, high-temperature compost fertilization is matched with the effective component poly-Y-glutamicacid, and accordingly the crop straw organic fertilizer containing the poly-Y-glutamicacid is prepared. The preparation technology is simple, low in cost and high in controllability. The crop straw organic fertilizer containing the poly-Y-glutamicacid is high in yield, free of environmental pollution and balanced in nutrient content; and the crop straw organic fertilizer containing the poly-Y-glutamicacid contains major elements of nitrogen, phosphorus and potassium, and rich microelements and beneficial microorganisms, and under the synergistic effect of the poly-Y-glutamicacid, a good effect on improving soil, raising soil fertility and improving crop quality can be achieved. The crop straw organic fertilizer containing the poly-Y-glutamicacid prepared through the method can be applied to soil fertilization of vegetable crops, grain crops and commercial crops.

The invention provides a multifunctional washing machine which can brush clothes. A function device of the washing machine is internally provided with a brush or a brush group driven by power, such as a brush bar, a brush disc, a brush block and the like. The hair of the driven brush brushes the positions such as collar, cuff and the like of clothes where the pollution is severe, thus achieving the effect of heavily cleaning the positions of clothes where the pollution is severe. The multifunctional washing machine can be used independently or used in combination, and can be combined with other function devices such as wave wheel rinsing and centrifuge dripping and the like according to the requirements.

The invention discloses an environment-friendly color-changing method of synthetic leather bass, characterized by comprising the following steps: adding 100-300 parts by weight of aqueous urethane resin, 20-120 parts by weight of aqueous color paste, 0-9 parts by weight of thickener, 0-3 parts by weight of leveling agent and 0-3 parts by weight of crosslinker to a container with a stirrer; stirring at a room temperature for 25-30 minutes to prepare color-changing slurry; uniformly coating the color-changing slurry on a synthetic leather bass in sizing amount of 80-150g / m, at a drying temperature of 80-120 DEG C and at a drying speed of 15-20m / min; and then, adopting a rolling extrusion or plate extrusion mode to emboss, wherein the rolling extrusion is carried out under the pressure of 25-30MPa, at the temperature of 180-190 DEG C at the speed of 15-20min / min, and plate extrusion is carried out at the pressure of 15-18MPa, at the temperature of 80-90 DEG C and at the period of 3-5s. The method for preparing the color-changing layer and the bass has the advantages of excellent adhesion fastness, simple process, convenient operation, emission reduction and energy saving.

The present invention provides a printing consumable chip regeneration method. A PCB board with a transfer chip is installed between printer chip contacts of the consumable and consumable chip contacts of the printer. One side of the PCB board is provided with a set of contacts contacted with the consumable chip contacts of the printer, and the other side of the PCB board is provided with a set of contacts capable of performing data transmission and exchange with corresponding printer chip contacts, so that an original chip does not need to be decrypted or rewritten and permanent regeneration of the chip may be achieved through directly employing one transfer chip and one original chip. Therefore severe pollution of the environment caused by abandoning a lot of toner cartridges may be greatly reduced, the environment is protected, and the usage cost of printing consumables may be greatly saved.

The invention discloses a preparation method of an anatase-type nanomaterial and self-cleaning solar glass made from the nanomaterial, and provides a method for producing a nanomaterial which is used as a self-cleaning coating on glass in the natural environments, and self-cleaning solar glass made from the nanomaterial. The preparation method comprises the following steps: (1) introducing nitrogen gas with high purity up to 99.99% into a Ti(OR)4 gasifier, a water gasifier, a mixing section of a reactor and a hydrolysis reaction section of the reactor respectively; mixing Ti(OR)4 vapor-carrying nitrogen gas with cold nitrogen gas in the mixing section to form Ti(OR)4 aerosol particles; transferring the Ti(OR)4 aerosol particles to the hydrolysis reaction section of the reactor, and mixing and carrying out hydrolysis reaction on the Ti(OR)4 aerosol particles and water vapor in the hydrolysis reaction section of the reactor, to produce TiO2 ultrafine particles. The self-cleaning solar glass made from the nanomaterial is produced by spray-coating the nanomaterial on the outer surface of glass at normal temperature and curing at normal temperature. The method is simple and low in cost, and the production of the self-cleaning solar glass from the nanomaterial is convenient.

The invention discloses a method and device for efficiently sorting and extracting fermentable organic matter from household garbage. The device comprises a front sorting processing device, a mechanical fine selecting device, a manual fine selecting device and a fine particle organic matter collecting device. The method comprises the following steps of: with front sorting processing as a premise,respectively carrying out mechanical fine selecting, manual fine selecting and fine particle organic matter collecting on mixed organic matter and high-concentration sewage obtained after separation to extract and collect the fermentable organic matter from the household garbage, wherein the fermentable organic matter can be directly used for preparing methane. The method and device disclosed by the invention can be used for extracting the fermentable organic matter from sorted household garbage, namely the raw material used for preparing the methane can be directly supplied to an anaerobic fermentation reactor can be obtained after a series of preprocessing processes are carried out.

The invention discloses a multifunctional organic fertilizer prepared by utilizing tannery sludge and wood fibers and a preparation method and application thereof. The multifunctional organic fertilizer is prepared from, by weight, 100 parts of tannery sludge and 300-800 parts of wood fibers. The multifunctional organic fertilizer is prepared by using sludge-containing sewage of a tannery as a raw material, conducting flocculation, precipitation, plate-frame filtration or concentration by means of a self-discharging centrifugal machine on the sewage to obtain the tannery sludge, mixing the tannery sludge with the smashed wood fibers and then performing air drying or compost fermentation. The wood fibers are preferentially edible fungus residues, a certain parts by weight of molasses and a certain parts by weight of phosphate can be further selectively added into the materials to prepare the multifunctional organic fertilizer which can be selectively applied to passivation and toxicity attenuation of tailings in a metallic ore area and alkaline passivation and microorganism adsorption of polluted soil in a common ore area or can be directly applied to garden flowers, resource utilization of the tannery sludge, the edible fungus residues and other waste is achieved, and the effect of using the waste to treat pollution is achieved.

The invention discloses a processing system and processing technology of a waste lead-acid storage battery and application of regenerated lead. The processing technology comprises the steps of performing processing by a smashing and separation system to obtain lead paste, a grid and plastic after a recycled lead-acid storage battery is processed in advance, and drying the grid by a drying system and then transmitting the grid to a lead stove; and processing the lead paste sequentially by a melting system, a lead dross removal system and a dust collection system, transmitting the lead paste tothe lead stove after processing to mix with the grid in the lead stove for smelting, and obtaining the regenerated lead after processing. The technology employing the system to process is simple to operate and is high in recycling rate, the addition of other metal elements can be controlled by the processing process, so that the regenerated lead can be used for preparing power battery lead powderand also can be used for preparing the grid of the lead-acid storage battery, the influence of the waste lead-acid storage battery on an environment is achieved, the lead resource development is alsogreatly saved, and the processing technology has good social and economic benefit.

The present invention relates to hydrogen producing method, and especially method of producing hydrogen with biomass and solid organic waste and through fermentation and photosynthesis coupling. The method includes hydrolyzing and acidifying biomass and solid organic waste to produce pyruvic acid, short chain fatty acid and small amount of H2 and CO2; fermenting the mixture of pyruvic acid and short chain fatty acid under the action of fermenting hydrogenogen to produce great amount of hydrogen as well as small molecular weight side products ethanol, acetic acid, propionic acid and butyric acid; and further inoculating photosynthesis hydrogenogen to convert the small molecular weight side products into hydrogen. The apparatus can treat waste effectively to produce clean energy source material, and has high hydrogen output, high energy source converting rate, high matrix utilizing rate and low hydrogen producing cost.

The invention discloses a method for preparing an aluminum scandium intermediate alloy through molten salt electrolysis of a chlorine salt oxide system. Scandium oxide serves as a raw material, CaO orMgO is added in a chloride fused salt electrolyte composed of a NaCl-CaCl2 or KCl-CaCl2, electrolysis raw material Sc2O3 is added, a chloride-oxide mixed fused salt electrolyte is composed, liquid aluminum serves as a cathode, graphite serves as an anode, direct current is led for electrolysis under the condition that the temperature ranges from 670 DEG C to 780 DEG C, the current density of theanode is 0.5-1.5 A / cm<2>, the electrolysis time ranges from 4 h to 10 h, and the liquid aluminum scandium intermediate alloy is obtained on the cathode at the bottom of an electrolytic cell. The method has the beneficial effects that the technology is simple and convenient, the production cost is low, the product purity is high, continuous production is easy, and a reducing agent does not need tobe used. Meanwhile, in the electrolysis process, the liquid aluminum scandium intermediate alloy is obtained on the cathode at the bottom of the electrolytic cell, the anode discharges CO2, generationof other harmful gases is avoided, and serious pollution to the environment is effectively reduced.

The invention discloses a method for producing biogas from fruit and vegetable wastes. The method is characterized by comprising the following steps: (1) raw material pretreatment: grinding the fruit and vegetable wastes in a ball grinder to damage the difficultly degraded cellulose structure, releasing the bound water in the raw material and the intracellular water and the intracellular matter in the plant cell, and finally putting the obtained pasty effluent in a storage tank to store; (2) solid-liquid separation and coupling: performing solid-liquid separation on the pasty effluent to obtain a fruit and vegetable juice and a solid residue, wherein the fruit and vegetable juice comprises plenty of soluble carbohydrates (mainly comprising monosaccharide and polysaccharide) and easily biodegradable components for methanation processing; the solid residue is mainly rich in cellulose content; acid liquor containing plenty of volatile organic acids is obtained through a high-solid-concentration hydrolysis acid production reaction, a proper substrate is provided for the methane production process, and then the two-phase anaerobic system has a high gas production performance.

The invention relates to a high-purity fluorine-containing organophosphorus flame retardant and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of trifluoroethyl phosphate, namely adopting phosphorus oxychloride and trifluoroethanol of which the total molar weight ratio is (1:3)-(1:6), adding a catalyst which accounts for 2%-10% of total weight of reactants, carrying out catalytic reaction at the temperature of 10-90 DEG C for 2-16 hours, carrying out reduced pressure distillation for 1-5 hours to remove insufficiently reacted phosphorus oxychloride and trifluoroethanol after the catalytic reaction is completed, and then carrying out suction filtration to obtain the catalyst capable of being recycled and a crude trifluoroethyl phosphate product; (2) purification and refining of the trifluoroethyl phosphate, namely refining phosphate by adopting a continuous rectification process, adding a drying agent to the crude trifluoroethyl phosphate product so as to remove moisture contained in a to-be-purified substance, rectifying by introducing into a low-boiling removing rectifying column, condensing high-purity trifluoroethyl phosphate rectified through multi-times column chromatography into liquid, namely the high-purity trifluoroethyl phosphate flame retardant contained in the electrolyte of a lithium ion secondary battery, by virtue of a condenser, wherein the purity is more than or equal to 99.9%, and the yield is more than or equal to 92%.