90results about How to "No waste water" patented technology

The invention relates to an L-2-reanal biological preparation method, which includes: utilizing L-threonine as raw materials, stirring the L-threonine in water at the temperature of 15-50 DEG C under the catalytic action of L-threonine deaminase and whole cells with a leucine dehydogenase and coenzyme regenerating function, and obtaining L-2-reanal after reaction. In the L-2-reanal biological preparation method, water is used for substituting for buffer salt solution to form a water-phase reaction system, cost of raw materials is reduced, threonine deaminase and whole cells used for catalyzing can be produced in batch by fermentation of microorganisms, are low in cost and wide in sources. Biological enzymatic catalysis reaction is water-phase reaction, transformation conditions of the enzymic method are mild, raw materials are transformed thoroughly, post-treatment is simple, products are separated by isoelectric point crystallization technology and film evaporation separation technology jointly, and the L-2-reanal biological preparation method is capable of recovering water and ammonium formate is low in cost, free of discharge of waste water and waste residues, environment-friendly in process and applicable to industrialized production of the L-2-reanal.

Sand sticking collapse agent for casting comprises raw material of weight per cent: soluble glass 94.5-98úÑ, dextrose powder 1.5-2.5úÑ, light calcium carbonate powder 0.2-2úÑ, suspending agent 0.2-0.5úÑ and antiseptic 0.1-0.5úÑ. It succeeds to integrate aforementioned raw material, has good high temperature collapsibility and anti-sticking ability, can fit to multiple hardening ways, cut baking time for CO2 and can increase recovery rate for used sand.

The invention discloses a comprehensive utilization system and method for lignite upgrading and drying energy. According to the system, a fume outlet of a hot blast stove (8) is connected with a fly ash separator (9); an ash residue outlet at the lower end of the fly ash separator (9) is connected with a high-temperature ash cooler (7); a clean fume outlet is connected with a dry wind inlet of a fluidized bed dryer (1); a fume outlet of the fluidized bed dryer (1) is connected with a cyclone separator (10); and a material outlet of the fluidized bed dryer (10) is sequentially connected with an inlet of a finished product coal temperature reduction device (6), and an inlet of a lignite screen separation device (12). The system makes the best of the heat generated during fine pulverized-coal combustion after the completion of lignite drying to dry the lignite, without an external heat; the heat pump technology is adopted to recover the exhaust heat generated by ready coal, high-temperature ash residue, exhaust steam and the like during the lignite drying process for predrying of the lignite; and meanwhile, the ash residue and solidified water are adopted to form ash residue slurry for industrial brick manufacturing raw materials, so as to achieve the purposes of energy conservation, emission reduction and waste utilization.

The invention discloses a method for clean method for producing sodium bicarbonate and sulphur by means of Glauber salt wet method for reducing the emission of CO2 and avoiding the discharge of wastewater, which comprises the following steps: A, sodium sulphide preparing process, B, hot carbonatation process, C, sulphur preparing process, D, cold carbonization process, and E, mother liquor purifying. Glauber salt coal is reduced and calcined into sodium sulphide, and the sodium sulphide solution is heated and carbonized into a mixed solution with the soda as the main component by use of sodium bicarbonate, then the mixed solution is cold-carbonated by CO2 to separate out NaHCO3 crystal, which is dried to finally obtain the soda in conformity with relevant standard. The production method has the advantages of simple process, environmental friendliness, no pollution, full circulation of the mother liquor, and no wastewater discharged.

The process of extracting and preparing high purity solanesol from tobacco extractum includes: dissolving crude tobacco extractum in alkane solvent, saponifying under alkali alcoholate condition for 3 hr, filtering the reaction product, adsorbing the filtrate with macroporous resin, eluting with low toxicity mixed lower ketone and lower alcohol solvent, rotary evaporating the eluted solution to recover solvent, and decompression vacuum drying to obtain solanesol in the purity of 90-95 %. The said process has simple operation, reusable solvent, low cost and no pollution, and may be used in industrial production of solanesol in the purity over 90 %.

The invention discloses an additive type phosphorus phenanthrene oxa-flame retardant and a preparation method thereof. The chemical name of the additive type phosphorus phenanthrene oxa-flame retardant is poly-(10-taconic acid gylcol ester-9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide). The preparation method comprises the following steps of: firstly carrying out a reaction on DOPO, itaconic acid and ethylene glycol to generate a monomer midbody 10-taconic acid gylcol ester-9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; and polymerizing the reacting midbody at high temperature under the function of catalyst to obtain a target product. The additive type phosphorus phenanthrene oxa-flame retardant provided by the invention is applicable to various high molecular materials with higher processing temperature such as linear polyester, fiber, polyamide, polyurethane and the like; and the preparation method is free from halogen, environment-friendly, simple in operation process, easy to control, high in yield, good in product repeatability, and less in impurity, wherein the product yield can be 98.5%-99.9%, and the production cost can be reduced.

The invention relates to a cement-free and baking-free shale suppression bearing brick and a manufacturing method thereof, which relates to a construction-used bearing brick and a manufacturing method thereof. Ordinary shale is used as main raw material and various 'wastes' are used as ingredients in the method; no open fire, waste gas, ash or waste water is produced in the manufacturing process which ensures low water and electricity consumption; various primary technical performances of a product are excellent. The method comprises steps that: (1) the materials are prepared according to following weight ratio: 40 to 50 percent of shale rock, 20 to 21 percent of auxiliary material, 4 to 6 percent of taillings powder, 7 to 9 percent of heavy calcium carbonate, 4 to 6 percent of gravel soil, 3 to 4 percent of alkali residue, 4 to 7 percent of construction waste, 5 to 6 percent of MSH polymerization condensate material especially used for shale and proper amount of water; (2) raw material treatment; the primary material and the auxiliary material are grinded; (3) ingredient stirring; (4) well-proportioned mixing and ageing; (5) mulling and plasticizing; (6) suppressing and forming; (7) steaming, pressing and solidification into finished product. The practice of the invention is environment friendly, and the quality of manufactured products is excellent, which reaches the standard of the bearing brick but has low cost and can be taken as the bearing brick for replacing a clay brick.

The invention discloses cerium oxide polishing powder. The purity TREO of cerium oxide CeO2 is more than or equal to 99.95%; cerium oxide is CeO2 powder with crystal form being a uniphase cubic crystal system; cerium oxide is shaped like a round cake with the average particle size of 1mum. The invention further discloses a preparation method for the cerium oxide polishing powder. The preparation method comprises the steps of preparation of cerium chloride, precipitation, dehydration, roasting, smashing and the like. Compared with the existing preparation method, the polishing powder prepared by adopting the method is cerium oxide powder, F is not required for introduction in the preparation process, and the preparation method has the advantages of being simple in process, low in cost, and free from waste water; the cerium oxide polishing powder has the advantages of having no scratch in the polishing process of products, being high in polishing precision and the like.

The invention relates to an industrial automatic production method of sludge dry powder by sludge dewatering and equipment thereof. The method realizes industrial automatic production in industrial automatic production equipment of sludge dry powder by sludge dewatering, particularly sludge dewatering machine as main equipment. The sludge of water content below 85 wt% is dewatered to obtain sludge of water content below 5 wt%. The inventive method and equipment realize harmlessness, stabilization and reclamation of sludge dewatering; and can be widely used for dewatering domestic sludge or sediments, industrial sludge or sediments, lake and river course sludge or sediments.

The invention discloses a sol-gel preparation method of a porous nickel cobaltate material. The method comprises the following steps of: dissolving cobalt acetate and nickel acetate in distilled water to obtain acetate aqueous solution, adding citric acid aqueous solution, uniformly mixing, adding distilled water for diluting until the concentration of the cobalt acetate is between 0.016 and 0.05 mol/L to obtain diluted solution, and drying to obtain a precursor; and grinding and calcining the precursor to obtain the porous nickel cobaltate material. The method has a simple preparation process and is environmentally-friendly; and the obtained nickel cobaltate has a spinel cubic phase, high purity, high degree of crystallinity, uniform pore diameter distribution and the pore diameter size of less than 200 nanometers, and is porous.

The invention provides an iron-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) enabling iron-containing soluble salt solution to be mixed with alkaline aqueous solution and reacting, to obtain a slurry-state head product; 2) in an aerobic atmosphere, enabling the head product to be loaded on a solid carrier in a spraymode, performing crystal phase transition, to obtain a secondary product loaded with FeOOH on the surface of the solid carrier; and 3) in a nitrogen atmosphere, drying the secondary product, to obtain the iron-based catalyst. The provided preparation method for the iron-based catalyst is short in technological process, low in production cost, low in water consumption, and wastewater-free. The catalyst prepared by the preparation method is high in direct coal liquefaction catalytic activity.

A system for desulfurizing limestone in a circulating fluidized bed boiler on the basis of flow state reconstruction comprises a hearth, a conveying mechanism, a storage bin mechanism and a pipeline, wherein the conveying mechanism comprises a temporary storage bin, a mixer and a fan; a temporary storage feed port and an exhaust port are formed in the upper part of the temporary storage bin; the storage bin mechanism comprises a storage bin, a warehouse top dust collector, a through pipeline, an electric heater and a fan; the system further comprises an air separator communicated with an exhaust gas outlet of the hearth, a return feeder, an air chamber arranged at the bottom of the hearth and led into the hearth from a primary air duct, secondary air pipes distributed on the front wall and the rear wall of the hearth, an inlet valve set communicated with the secondary air pipes and used for desulfurizing limestone in the boiler, a tail flue arranged at the top of the separator, as well as a return feeder leg integrated with the separator; the inlet valve set is connected with the mixer through the pipeline; and the return feeder is connected with the bottom of the return feeder leg. The system has the advantages that the structure is simple, the separation efficiency is high, discharging is facilitated and the like.

A reverse osmosis seawater desalting pulsing electromagnetic field pretreatment is carried out by: passing seawater into the first and the second stage pulsing electromagnetic field treating apparatus by grit chamber, treating it there, and entering reverse osmosis unit at pulsing voltage 1-1000V and pulsing frequency 0.1-500Hz. Its advantages include low cost, no pollution, to improve water quality and decrease pretreatment process.

The invention relates to the field of articles for daily use and particularly relates to liquid soap. The liquid soap is prepared by the following steps of: mixing sodium hydroxide and water, adding the mixture into a reactor, stirring and heating to 68 DEG C, adding lauric acid and oleic acid while stirring, gradually adding mixture of ethylene-glycol monoester stearate and lauroyl diethanolamide after stirring uniformly, after fully stirring and complete reaction, adding ethylenediamine tetraacetic acid and methyl parahydroxybenzoats when the temperature is reduced to 50 DEG C, and finally adding a proper amount of glycerinum and a proper amount of essence. The mass ratio of the materials such as sodium hydroxide, lauric acid, oleic acid, ethylene-glycol monoester stearate, lauroyl diethanolamide, ethylenediamine tetraacetic acid and methyl parahydroxybenzoats is 1:8:1.5:6:1.5:5:0.5.

The invention relates to the field of spice synthesis and particularly relates to a synthetic process of L-menthol. The process includes steps of d,l-menthol synthesizing, d,l-menthol rectification, d,l-menthol esterification, d,l-menthyl benzoate rectification, d,l-menthyl benzoate resolution, D-menthol synthesizing, menthol isomerization and L-menthol synthesizing. The process adopts thymol that is a simple, easily available and cheap chemical product as a raw material. Esterification conditions are optimized and the esterification and rectification are performed at the same time so as to allow the esterification to be converted into a way beneficial to d,l-menthyl benzoate production, thus increasing the esterification yield. Crystallization and resolution are optimized by utilization of the d,l-menthyl benzoate. Preparation of the L-menthol by the process is characterized by being high in yield, low in cost, simple and convenient in operation, suitable for continuous and large-scale production, and the like. According to the process, operation of the process is cyclic with a whole system being sealed, and the process is free of waste water, energy-saving and environmental friendly.

The invention discloses cerium oxide polishing powder and a preparation method thereof. The cerium oxide polishing powder is characterized by consisting of cerium oxide and phosphate, wherein the weight content of phosphate is 3-15% of the amount of cerium oxide. Compared with the conventional preparation method, the preparation disclosed by the invention has the advantages of simple process, low cost and no generation of wastewater as the polishing powder is cerium oxide polishing powder and no F is introduced in the preparation process; and the cerium oxide polishing powder has the advantages that a product is not scratched in the polishing process of the product, the polishing precision is high and the like.

The invention relates to a sealed rack environment controller including an air cleaning device, a temperature adjusting device, a humidifying device, an automatic opening-closing device, a base and a control panel. The air cleaning device performs purifying processing on the air in a sealed rack, the temperature adjusting device regulates and controls the temperature in the sealed rack, the humidifying device generates water steam to humidify the air in the sealed rack, the automatic opening-closing device controls the opening and closing of the sealed rack, the humidifying device is arranged on the base, and the control panel integrally detects, regulates, and controls the work conditions of the air cleaning device, the temperature adjusting device, the humidifying device, and the automatic opening-closing device. The sealed rack environment controller accurately controls the temperature, humidity, and dust granularity of the inside environment of the sealed rack and makes the inside environment be the ideal environment for various precision apparatuses and electric appliances.

Provided is a method for synthesizing carbamazepine. The method comprises the steps that 1 part by weight of iminostilbene and 10 parts by weight of benzene are put into a glass lining reaction vessel of 1,000 L to be dissolved, and the materials react with 0.7 part of triphosgene for 5 h to 6 h at 70 DEG C to 80 DEG C after being dissolved to enable all the materials to react completely; 2/3 of benzene is distilled off through reduced pressure distillation, suction filtration is conducted after cooling is conducted, the materials are put into a drying oven or a drying room to be dried for 3 h to 4 h at 60 DEG C after being filtered, iminostilbene carbonyl chloride is obtained and put into a glass lining reaction vessel of 1,000 L, 15 parts of 95% ethyl alcohol is added, the materials are dissolved in the glass lining reaction vessel, 0.8 part of liquid ammonia is dropwise added, reacting is conducted for 8 h at 50 DEG C to 60 DEG C, heat preservation is conducted for 30 min, all the materials are cooled to room temperature, 1%-3% by weight of activated carbon is added, the temperature is increased to 78 DEG C, decoloration is conducted for 2 h, a mother solution is subjected to hot filtration, residues are discarded, and the mother solution is sent back to the glass lining reaction vessel; 1/2 of ethyl alcohol is distilled off, after cooling is conducted, natural crystallization and suction filtration are conducted, a crystal substance obtained after filtration is conducted is put into the drying oven or drying room to be dried for 3 h to 4 h at 60 DEG C, and the finished carbamazepine product is obtained. The yield ranges from 82% to 90%, and the content ranges from 91.5% to 99.1%.

The invention discloses a preparation method of environment-friendly wall surface sealing glue for a building, relating to the technical field of building appliances. The preparation method comprises the steps of in a stirring tank A, dissolving PVA into water according to a proportion that 850kg of water is added in150kg of PVA, heating to 90 DEG C within about 1.5 hours while stirring, preserving the heat for half an hour, and then, cooling to 50 DEG C; in the stirring tank B, simultaneously and sufficiently dissolving boric acid and sodium benzoate in water; and in the stirring tank C, (1) adding 75-85% of water, (2) simultaneously pouring 10-15% of products in the stirring tank A and VAE into water, mixing and dissolving the products in the stirring tank A, VAE and water, and stirring for 30 minutes; and (3) pouring 0.025% of defoaming agents, 0.025% of emulsifiers and 0.2% of thickening agents at one step to dissolve, and uniformly stirring. By using the preparation method, the adhesive force of a smooth basement layer interface can be increased, the bonding strength is high, the cement galling process is firm and reliable, hollowing is avoided, and no waste gas, waste water and waste power consumption are generated in the production process.

The invention discloses a production process of acetamiprid. The production process comprises the following steps: (1) amination: adding a solvent into an amination reaction kettle, reducing the temperature, introducing a certain quantity of monomethylamine gas into the solvent, controlling under certain temperature conditions, adding 2-chloro-5-chloromethylpyridine into the reaction kettle, reacting, increasing the temperature for amine discharge, then reducing the temperature, filtering, filtering out methylamine hydrochloride, removing the solvent from a filtrate and transferring to the next step; and (2) condensation: controlling a material obtained from the above step under certain temperature conditions, dropwise adding ethyl N-cyanoethanimideate, reacting, reducing the temperature, filtering, obtaining the acetamiprid, drying, distilling a filtrate and recovering ethanol. The production process disclosed by the invention is high in amination reaction yield, simple in post-treatment, incapable of producing wastewater, simple in condensation reaction, high in yield and free from wastewater production.

The invention relates to the technical field of wet metallurgy, in particular to a method for vanadium extraction through leaching and extracting. A leaching work section and an extracting work section are included, and a vanadium-containing product is obtained through evaporation concentration after three-stage reverse flow leaching and extracting. The method for vanadium extraction through leaching and extracting has the beneficial effects that high-temperature ore burning is not needed, poisonous gas such as hydrogen chloride and chlorine is not generated, a high-temperature section is omitted, the condition is mild, and energy is saved; water is recycled, and waste water is avoided; ozone oxidation is used, the oxidation effect is good, and oxidation products do not generate pollution;and an inductive agent is used, and the leaching efficiency is improved.

The invention provides a bonding surface disposal method of a packing box. The surface of the bonding position of the packing box is disposed by a low-temperature plasma before the bonding is achieved by an adhesive. The method can effectively reinforce the bonding of the packing box, gains the bonding effect with high quality, and is safe and protects the environment.