501 results about "Trichloroethylene" patented technology

The invention provides a formaldehyde scavenging agent and relates to a decoration deodorant. The formaldehyde scavenging agent consists of the following ingredients: 34 to 40 percent of plant extract liquid, 9 to 12 percent of sodium bicarbonate, 8 to 12 percent of hydrogen peroxide, 3 to 5 percent of penetrating agents and 35 to 40 percent of purified water. A preparation process of the formaldehyde scavenging agent comprises the steps that: the extract liquid, the sodium bicarbonate, the hydrogen peroxide, the penetrating agents and the purified water are put into a container to be uniformly stirred, and the formaldehyde scavenging agent is obtained. A plant and chemical combination method is adopted, formaldehyde can be fast decomposed in several minutes, high speed and long effect are realized, and the rebound and the secondary pollution are avoided. The formaldehyde scavenging agent has a good restoration effect on floor furniture scratches and can also be diluted to be sprayed onto objects or into the air for odor removal after decoration, and benzene series substances, carbon monoxide, sulfur dioxide, chlorylene, chlorine gas and microorganisms can be decomposed.

The invention provides methods and microbial cultures for the bioremediation of organic halide contaminated groundwater contaminated with organic halides, such as di- and trichloroethene. The methods involve adding, in situ to organic halide-contaminated groundwater a carbohydrate and one or more reductive dehalogenation factors, usually in the form of a nutrient extract, both in amounts sufficient to permit in situ reductive dehalogenation of the organic halide by a microbial population. The microbial population may be endogenous to the ground water or added exogenously. The nutrient-enriched ground water is then maintained in situ under reducing conditions to reductively dehalogenate the contaminating organic halide. Enriched bioremediation cultures are produced by adding to organic halide contaminated groundwater which comprises an endogenous microbial population capable of reductive dehalogenation of the organic halide a carbohydrate and frequently, one or more reductive dehalogenation factors. Thereafter, the nutrient-enriched groundwater is incubated under reducing conditions whereby the organic halide is reductively dehalogenated and the microbial population is selectively and numerically expanded to yield a bioremediation culture.

A zero-valent metal emulsion is used to dehalogenate solvents, such as pooled dense non-aqueous phase liquids (DNAPLs), including trichloroethylene (TCE). The zero-valent metal emulsion contains zero-valent metal particles, a surfactant, oil and water. The preferred zero-valent metal particles are nanoscale and microscale zero-valent iron particles.

The invention relates to a method for preparing an electrolyte ceramic membrane of a lithium ion battery, in particular to a tape casting method for preparing the electrolyte ceramic membrane of the lithium ion battery, and belongs to the field of ion conductive ceramic materials. The invention adopts the tape casting method; ceramic powder with a chemical formula of Li1.4Al0.4(Gel-xTix)1.6(PO4)3(wherein x is equal to 0-1.0) is selected as raw material powder; triethanolamine or phosphate are selected as a dispersing agent; ethanol, propyl alcohol, butanone, triclene, or azeotropic solution prepared from any two of the ethanol, propyl alcohol, butanone and triclene is selected as a solvent; polyvinyl butyral (PVB) is selected as an adhesive; polyethylene glycol or dibutyl phthalate is selected as a plasticizer; the range of solid content of slurry is controlled between 18 and 30vol percent; the uniform slurry is prepared through ball milling, and then is prepared into a green belt bythe tape casting method, and the green belt is subjected to heat treatment to form the electrolyte ceramic membrane; and the electrolyte ceramic membrane has good strength and toughness, and can be applied to actual production.

The invention discloses a method for restoring soil compositely polluted by heavy metals and organics by using a transgenic plant and is technically characterized in that foreign genes which can strengthen the efficiency for restoring the organic pollution of the plant and foreign genes which can improve the tolerance and the accumulation to a plurality of metals of the plant are introduced to the plant so as to establish a transgenic plant which has a better restoring effect on the pollution by the heavy metals and the organics. The method of the invention has a better restoring effect on the polluted soil of the three types as follows: (1) the soil polluted by organic pollutants of halohydrocarbon compounds such as trichloroethylene, dibromethane, and the like; (2) the soil polluted by various heavy metals such as Cd, Cr, Cu, Mn, Zn and Pb; (3) the soil compositely polluted by the heavy metals and the organics. In addition, the method of the invention comprises the procedures of establishing the transgenic plant, the screening and cultivation of light-demanding plants and the restoring of polluted soil by the transgenic plant. The method of the invention has broad application prospect in the restoring of the soil compositely polluted by the heavy metals and the organics.

The invention discloses an oxidizer for trichlorethylene polluted soil, a preparation method and a use method thereof. The medicament includes an oxidant and an activator; the oxidant is a sodium persulfate solution with a mass volume ratio of 1.2 to 2.4 g/L; the activator is a ferrous sulfate heptahydrate solution with a mass volume ratio of 0.7 to 1.4 g/L and a mass of A citric acid solution with a volume ratio of 0.1g/L. The use method of the medicament comprises the following operation steps: simultaneously injecting the oxidant and the activator into the soil polluted by trichlorethylene, or injecting the activator first and then injecting the oxidant, and the volume ratio of the activator and the oxidant is 1:1. The invention has remarkable medicament removal effect, low cost and environmental friendliness.

The invention relates to a method for removing hydrochloric ether contained in soil in the restoring and treating process of hydrochloric ether contaminated soil, and belongs to the technical field of environment treatment. The method mainly removes certain hydrochloric ether contaminants which exist in the soil through the oxidation action of sodium persulfate (Na2S2O8). The method can be used for treating the hydrochloric ether contained in the soil by carrying out out-phase activation on an oxidizing agent by simultaneously adding ferroferric oxide powder under the condition of ensuring the existence of the sodium persulfate in a treatment process, thereby accelerating the chemical oxidation process and enhancing the treatment effect. The method disclosed by the invention is simple, easy to operate and outstanding in effect. According to the invention, the sodium persulfate as a green oxidizing agent is stable in chemical property and higher in oxidization capacity, the hydrochloric ether achieves high removal efficiency, and the removal rate of trichloroethylene in the soil achieves 99%. The method disclosed by the invention has the advantages of fast dechlorination on the hydrochloric ether contaminated soil, less destruction on a soil structure, no toxicity of products, convenience for subsequent utilization and low expense.

The method includes following steps, (A) adsorption: to filter industrial by-product hydrochoric acid containing organic substances (benzene, methylbenene, chlorobenzene and triclene etc.) from tens to hundreds, the organic substance in the by-product hydrochoric acid is absorbed on resin by adsorption tower filled with phenylethene and styrene-divinglbenzene large aperture adsorbing resin, the by-product hydrochoric acid being absorbed is colourless and transparent, the content of organic substance can be reduced below 1 mg/L. (B) deadsorption; to do deadsorption and regeneration to the larger aperture adsorbing resin which absorbed organic substances during step A that water vapour is used as absorbent agent, the deadsorption temp. is 110-150 deg.C, the time is 2-16 hrs, (C) recovery: to recover the organic substances by gas and liquid deadsorption, oil and water sepaation, the water phase is returned to hydrogen chloride adsorption process to be used generating by-product hydrochloric acid.

Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials. Use of various gradations and mixtures of this sulfur-modified iron (SMI) premix have been successfully demonstrated to remove the following toxic substances from water: arsenic (arsenite and arsenate); disinfection byproducts and precursors; copper; chrome VI; sulfate; and chlorinated solvents including trichloroethene. Metals removed may be present in the untreated water in either the dissolved state or as a fine particulate. SMI has been fabricated using sulfur in the amount of up to 50% of the weight of the iron. SMI premix has been manufactured using a wetted but non-fluid mix at room temperature and at elevated temperature. SMI has been successfully demonstrated in pressure and gravity contact beds in both upflow and downflow modes. It has been prepared in uniformly-graded media similar in size and gradation to commercially-available filter media. Spent SMI can be recycled as a non-hazardous material as feed material to a steel production facility.

The invention relates to a method for cleaning a sapphire substrate, which comprises a step of organic solvent ultrasonic cleaning at normal temperature; and a step of soaking by acetone when heated. Through the implementation of the method for cleaning the sapphire substrate, a trichloroethylene reagent used in the prior cleaning method is removed, so environmental pollution is reduced and operators are prevented from being poisoned; and during cleaning, the ultrasonic cleaning and the heating cleaning are used to save time and improve the cleaning efficiency and the cleaning quality. The method has the advantages of simple technology and convenient operation, and meets the requirement of environmental protection.

A preparation method of sulfadoxine belongs to the field of sulfanilamide antimicrobial drug preparation. Cyclization reaction comprises the following steps of: firstly pouring a sodium methoxide solution into a reactive pan, then successively adding methanamide and methyl ethyl methoxymalonate, keeping warm, recovering methanol, cooling for crystallization, drying by centrifugation, discharging,and drying to obtain 5-methoxy-4,6-disodium dihydroxypyrimidine; Chlorination reaction comprises the following steps of: firstly putting phosphorus oxychloride into a reaction vessel for heating, adding 5-methoxy-4,6-disodium dihydroxypyrimidine into the reaction vessel to react, decompressing and recovering phosphorus oxychloride until the material is dry, cooling, adding trichloro ethylene withuniformly stirring, putting into a hydrolysis pan for hydrolyzation, collecting a trichloro ethylene layer after standing and delaminating, followed by a neutralization reaction, controlling pH value, washing, removing a water layer, recovering trichloro ethylene, and releasing crystals to obtain 5-methoxy-4,6-dichloropyrimidine. The preparation method provided by the invention can be used to guarantee the product purity, prolong the service life of equipment, avoid the damage to the environment and human body, reduce emission, and save energy, and accords with foreign pharmacopoeia standard requirements.

The invention relates to a method for extracting trans-dichloroethylene from low-boiling-point materials which are used for producing trichloroethylene by the gas phase catalysis. The method is characterized in that the low-boiling-point materials which are used for producing the trichloroethylene by the gas phase catalysis is deacidified, dehydrated and sent in a distilling kettle for distilling, and the trans-dichloroethylene is collected at the temperature of 47-49 DEG C. A trans-dichloroethylene product with the purity being more than 99% can be obtained by the method of the invention. The method utilizes wastes and reduces environmental pollution.

The invention discloses a method for preparing a road asphalt material suitable for microwave heating, which comprises the following steps of: selecting microwave heating ferromagnetic powder, a coupling agent and road asphalt; preparing a wave absorbing agent, namely adding the ferromagnetic powder and the coupling agent into solution of trichloroethylene, then dispersing the solution of the trichloroethylene under the action of ultrasonic waves, and heating the evenly-dispersed solution mixture to remove the trichloroethylene and obtain the wave absorbing agent; adding the wave absorbing agent and the road asphalt into an asphalt heating stirrer according to a mass ratio to perform high-speed shearing, and cooling the mixture to obtain the road asphalt material suitable for the microwave heating; and selecting the asphalt electromagnetic parameters to be in the range with the microwave frequency of 0.9 to 6 GHz. The road asphalt material is widely used in the fields of microwave road de-icing and snow melting, the heating of reproducible asphalt pavement materials and the like. The road asphalt material has a simple preparation process, greatly improves the microwave heating rate of the asphalt material, and contains 50 weight percent of the asphalt material absorbed by the microwaves, and the microwave heating rate is 60 times that of the asphalt material containing no microwave absorbing agent.

The invention discloses a nitrogen-doped activated carbon catalyst and application thereof. The preparation method of the nitrogen-doped activated carbon catalyst comprises the following steps: adding a nitrogen-containing compound into water to dissolve to obtain a nitride solution, wherein the nitrogen-containing compound is one or more of ammonia water, ammonia gas, pyridine, pyrrole, imidazole, acrylamide, polyacrylamide and polyvinylpyrrolidone; adding activated carbon into the nitride solution to soak; completely drying the soaked activated carbon, and calcining in nitrogen atmosphere, thereby preparing the nitrogen-doped activated carbon catalyst. The nitrogen-doped activated carbon catalyst disclosed by the invention has very good catalysis property in reaction of catalyzing tetrachloroethane and acetylene to generate trichloro ethylene and chloroethylene and catalyzing tetrachloroethane gas phase cracking to generate trichloro ethylene.

The preparation process of electronic package box of Kovar alloy includes mixing the material with Fe 53-55 wt%, Ni 29-31 wt% and Co 16-18 wt% and ball milling in high energy ball mill for 2-8 hr to obtain the alloy powder; mixing the alloy powder with adhesive homogeneously and loading powder in the amount of 55-64 %; injection molding at 150-170 deg.c and 90-110 MPa in a injecting machine; solvent deoiling the injection molded blank via soaking in vinyl trichloride for 2-6 hr, drying at 40-60 deg.c for 30-60 min; hot deoiling at room temperature to 600 deg.c for 6-8 hr; and sintering at 1250-1280 deg.c inside sintering furnace for 1-3 hr; and post-treatment. The present invention has the advantages of high material utilization and high size precision.

The invention relates to a special cleaning agent for stone material, the component and the weight proportion are separately sodium hypochlorite 40 to 60 percent, vinyl chloride 8 to 12 percent, acetone 10 to 20 percent, surface-active material 15 to 25 percent, butyl ester 2 to 7 percent. Because sodium hypochlorite with functions of decontamination and discolouration, vinyl chloride with functions of decontamination, deoiling and infiltration, acetone, surface-active material and other material are added into the cleaning agent, the combination of the stains and chlorine atoms are strengthened, the water stains and the stains on the surface of silicate products can be efficiently cleaned, the washing effect is very good, besides the additive sodium hypochlorite has the function of disinfection. The cleaning agent has strong detergency, low cost, and can be made into liquid preparation, easy and convenient in use. The cleaning agent is a typical environment-friendly cleaning agent.

The invention relates to a process for producing 1, 1, 1, 2-tetrafluoroethane by a gas-liquid phase method. The method taking trichloro ethylene and hydrogen fluoride as raw materials comprises the following steps of: generating F133a, hydrogen chloride, F123 and F131 under the effect of a fluorinating catalyst of trichloro ethylene and hydrogen fluoride; performing reaction between potassium hydroxide liquor and hydrogen fluoride to generate potassium fluoride, and performing reaction between potassium fluoride and F133a in the presence of the fluorinating catalyst to generate the product 1, 1, 1, 2-tetrafluoroethane, wherein the temperature is controlled at 250-280 DEG C, and the reaction conversion rate reaches 80%. Hydrogen fluoride and hydrogen chloride generated in the reaction process are less in corrosion to the device, the corrosion to reaction by potassium fluoride is far less than that of hydrogen fluoride, and the investment on the device is less.

The invention provides an asphalt regenerating agent diffusion test device and a testing method. Aiming at solving the problems that a relevant experiment device of the diffusion of the asphalt regenerating agent does not exist at present and an evaluation method is not efficient and accurate enough, the invention relates to a testing device of diffusion performance evaluation of the asphalt regenerating agent and the application method of the testing device. The testing device comprises a dissolving barrel, a sample bearing disc, a collection device, a liquid inlet pipe and a liquid outlet pipe. The testing method comprises the following steps: firstly, carrying out standing treatment on an asphalt test sample added with the regenerating agent; weighing the asphalt test sample and measuring the height of a test sample; adding trichloroethylene and carrying out asphalt washing; repeating a washing process for a plurality of times and measuring four components of solid-phase matters of a discharged liquid; calculating the relative content of the regenerating agent; and obtaining a diffusion rate of the regenerating agent through diffusion depth. According to the asphalt regenerating agent diffusion test device and the testing method, by using the property that the solubility of the trichloroethylene to asphalt, the asphalt test sample treated by the regenerating agent is gradually dissolved by using a layered dissolving method; and the diffusion properties of the regenerating agent are analyzed according to a component analysis result of the dissolved solution.