137results about How to "Reduce waste volume" patented technology

The present invention relates to the preparation process of phloroglucinol superior to available preparation process. The present invention features that the preparation process of phloroglucinol includes the complexing reaction between anhydrous aluminum trichloride as complaxing agent and 1, 3, 5-trimethoxy benzene, hydrolysis in concentrated hydrochloric acid solution, cooling and crystallization of hydrolysate to obtain coarse phloroglucinol product, decolorizing with active carbon and re-crystallization in water to obtain refined phloroglucinol product. The said preparation process of the present invention has phloroglucinol product with good color and high purity, short reaction time, less waste liquid exhaust, simple operation condition and high reaction stability.

The purpose of the present invention is to provide a kind of apparatus that can reduce the used amount of processing liquid, have less liquid waste, maintain high processing efficiency, and suppress the contamination of component in liquid circulation path to the minimum. In the direction perpendicular to the conveying direction, the substrate 1 is conveyed in an inclined state relative to the horizontal plane. In the vicinity of the position right below the lower side edge of substrate on the inner bottom plane of the water washing processing tank 10, the isolation plate is erect along the substrate conveying direction so as to separate the inner bottom portion of the water washing processing tank and divide it into the followings: the recycling tank portion 24 for recycling pure water that expels from the pure water expelling nozzle 14 without flowing through the substrate face; and the exhausted liquid tank portion 26 for accommodating the used pure water that is expelled from pure water expelling nozzle to flow toward the lower substrate side and falls from the edge. Therefore, pure water recycled inside the recycling tank portion can be used again; and the used pure water flowing inside the exhausted liquid tank portion is exhausted.

Provided is a developing solution manufacturing device and method, the device comprising: a preparation tank for supplying and stirring a developing stock solution and pure water to prepare an alkali-based developing solution; and a first liquid volume measuring device for measuring the amount of the alkaline-based developing solution in the preparing tank; A first alkali concentration measuring device for measuring the alkali concentration of the alkali-based developer in the preparation tank; adjusting the amount of the alkali-based developer in the preparation tank based on the measured values ​​of the first liquid volume measuring device and the first alkali concentration measuring device a first liquid volume control device; and adjusting at least one of the supply volume of the developing stock solution and the supply volume of pure water supplied to the preparation tank based on the measured values ​​of the first liquid volume measurement device and the first alkali concentration measurement device liquid supply control device.

The invention provides an etching solution managing apparatus, a dissolved metal concentration measuring apparatus and a dissolved metal concentration measuring method that can monitor the concentration of the etching solution and the concentration of the dissolved metal so that a replenisher is automatically supplied in a concentration fixed way and the dissolved metal is separated and recycled. The etching solution managing apparatus comprises a first property value measurement mechanism that measures a first property value related to the acid concentration of the etching solution; a second property value measurement mechanism that measures a second property value related to the concentration of the dissolved metal; a replenisher transmission controlling mechanism that controls the transmission of the supplied replenisher based on the relation between the acid concentration and the first property value and the measurement result of the first property value; a dissolved metal recycling and removing mechanism hat recycle and remove the dissolved metal based on the relation between the concentration of the dissolved metal and the second property value and the measurement result of the second property value.

The invention belongs to the technical field of solid waste pollution control, and relates to a method for making biogas from waste, which comprises the following steps: (1) pretreating the waste; (2) feeding the waste into a waste loading area for hydrolysis and acidification; (3) feeding the material subjected to hydrolysis and acidification in step (2) into a microbial inoculum loading area, and performing biogas production reaction under the effect of the microbial inoculum; (4) flowing out the material treated in step (3) from the microbial inoculum loading area, and returning to the waste loading area for further hydrolysis and acidification; and (5) repeating the cycle from step (2) to step (4) multiple times until the conversion of the waste into biogas is maximized. The invention overcomes the disadvantages of high rancidity possibility, long gas production start time, low gas production yield and gas production rate and the like of the waste conventional biogas utilization system, can greatly accelerate the gas production process of the rancidity-prone waste with a small amount of microbial inoculum, increases the gas production yield of the waste, lowers the amounts of leavings and waste liquids, and decreases the volume of a reactor and the operating cost.

The invention provides a synthesis method of tackifying alkylphenol formaldehyde resin. The synthesis method comprises the following steps: firstly, adding alkylphenol and an acidic catalyst into a reaction still; secondly, slowly adding 65 to 80 percent of the total amount of formaldehyde aqueous solution after the temperature is raised to 50 to 60 DEG C; carrying out reflux reaction for 1 to 3 hours and steaming out all water, then stopping distillation, slowly adding the remaining formaldehyde aqueous solution and steaming out the water; thirdly, after the reaction time is ended, raising the temperature to 140 to 160 DEG C; distilling out residual water and unreacted alkylphenol in a vacuum state; fourthly, distilling out entrained water and the unreacted alkylphenol, and drying an organic phase by distilling; adding water into the reaction still for washing, separating out a water phase and drying the organic phase to obtain a product disclosed by the invention. According to the preparation method disclosed by the invention, acidic ionic liquid is used as a solvent and a catalyst and replaces the acidic catalyst and the solvent in the synthesis method of the traditional alkylphenol formaldehyd resin, so that the extensive use of organic solvents is effectively avoided.

The invention relates to a method for synthesizing 2,3,4,4'-tetrahydroxybenzophenone. In the method, methanol solution of boron trifluoride is used as a catalyst, pyrogallic acid and p-hydroxybenzoic acid are used as the raw materials to synthesize the 2,3,4,4'-tetrahydroxybenzophenone. The method is characterized in that: the methanol solution of boron trifluoride is used as a catalyst; and the pyrogallic acid and the p-hydroxybenzoic acid undergo an acylation reaction at a certain temperature to form the 2,3,4,4'-tetrahydroxybenzophenone.

The invention relates to method and device for improving utilization rate of alkali liquor at an alkaline cleaning section of vacuum potassium carbonate desulfurization technique. The method comprises the following steps: diluting NaOH solution by replacing industrial new water with ammonia still waste water in a chemical workshop, and storing the diluted NaOH solution in a NaOH alkali liquor tank; conveying NaOH alkali liquor in the NaOH alkali liquor tank to the NaOH alkaline cleaning section at the upper part of a desulfurizing tower for carrying out alkaline cleaning, enabling the alkaline cleaning water to flow back into a waste alkaline tank, then evenly mixing the alkaline cleaning water in the waste alkaline tank with NaOH alkali liquor in the NaOH alkali liquor tank, conveying back to the alkaline cleaning section at the upper part of the desulfurizing tower for recycling, and stopping recycling until the pH value of waste liquor in the waste alkaline tank is lower than 10; conveying the waste liquor in the waste alkaline tank into an ammonia still tower to be used as alkaline instead of NaOH. According to the method and the device, the alkaline liquor at the alkaline cleaning section can be recycled, and the usage efficiency of the alkali liquor can be improved on the premise of guaranteeing the desulfurization effect of the desulfurizing tower.

Belonging to the technical field of uranium enrichment technology, the invention in particular relates to a uranium enrichment plant tail gas HF treatment process. The uranium enrichment plant tail gas HF treatment process includes: employing refrigeration cabinet refrigerated intermediate containers, NaF adsorption towers and a local discharge purification system for purification treatment on tail gas HF, and discharging the tail gas into the environment when the tail gas is detected to be qualified; and conducting desorption treatment on the adsorption towers reaching an adsorbing capacity limit, and reacting the desorption treatment generated neutralizing waste liquid with lime to obtain waste liquid meeting the discharge standard and solid waste reaching the clearance level. The process provided by the invention solves the technical problems of complex procedure, high comprehensive cost and adverseness to safety and environmental protection, gets rid of the dependence of HF collection on liquid nitrogen, simplifies the process flow, reduces the comprehensive cost, and greatly improves the safety and environmental protection of the tail gas HF treatment process.

The invention discloses an automobile asphalt cleaning agent. The automobile asphalt cleaning agent is prepared from, by weight, 2-8 parts of silicone quaternary ammonium salt, 2-5 parts of a penetrating agent, 1-3 parts of a leveling agent, 0.01-0.1 part of preservatives, 3-5 parts of a surface activity dispersant, 0.2-0.6 part of an anticoagulant, 12-15 parts of methylbenzene and 15-30 parts of alcohol-water mixture. The automobile asphalt cleaning agent is free of automobile paint damages, effective in cleaning and low in cost.

The invention relates to a black dye composition, which comprises reactive black 5 and reactive orange 142, wherein the weight ratio of the reactive black 5 to the reactive orange 142 is 5-95:95-5. The reactive dye composition has good water solubility and can reach 200g/L at 25 DEG C; the dye solution is uniform; and a problem of tailing of ending in the printing process is solved. The dye solution can be fully utilized so as to reduce waste liquor, dye solution treatment cost and environmental pollution.

The invention relates to a solid phase extraction membrane comprising an amphipathicity functional group and applications of the solid phase extraction membrane in enrichment and extraction of trace phenols in an environment water body. A macromolecular non-woven cloth solid phase extraction membrane material with the amphipathicity functional group is prepared by taking a polypropylene and polyethylene copolymerization melt-blown non-woven cloth material as a base material and uniformly and respectively bonding a lipophilic unsaturated fattyacid alkyl ester monomer and hydrophilic ethoxyethanol unsaturated fattyacid alkyl ester to the surface of the non-woven cloth material. The non-woven cloth prepared by the invention contains a crylic acid alkyl ester lipophilic group and a hydroxyl alkyl ester hydrophilic group, so that in the process of extracting a phenol type polar compound, the non-woven cloth synchronously develops nonpolar intermolecular force and hydrogen-bond interaction and has relatively high extraction performance. The non-woven cloth material is used for preparing a solid-phase disk membrane; and in a water sample enrichment process, the mass transfer speed is high; and a large size of environment water samples can be quickly enriched and extracted.

The invention relates to a micron-sized supported difunctional polymer brush with nitroxide free radicals and sulfonic groups. A production method comprises the steps of using 2,2,6,6-tetramethyl-4-piperidyl methacrylate TMPM and styrene St as monomer, using chloromethylated cross-linked polystyrene micro-spheres with particle size of 74-149 [mu]m and a Cl content of 1.12 mmol/g as a macroinitiator, adopting ARGETATRP for synthesizing a TMPM and St block polymer brush, using m-chloroperbenzoic acid mCPBA for oxidizing piperidyl of the TMPM into the nitroxide free radicals, and using sulfur forsulfonating the St to obtain the difunctional polymer brush. Application of the difunctional polymer brush in synthesis of polycarboxylate water reducer reactive macromonomer is further provided. Theproduced difunctional polymer brush can achieve recovery and recycle of a polymerization inhibitor and an acid catalyst at the same time, the production cost is reduced, and the reaction rate is improved.

The invention relates to a recycling process for regeneration waste liquid. The waste liquid generated by a cation bed or a sodium bed is stored in a regeneration waste liquid pool and conveyed to a self-cleaning filter through a pump and then directly enters an ultrafiltration membrane, produced water of the ultrafiltration membrane enters an ultrafiltration pool, sequentially passes through a booster pump, a first security filter and a first high-pressure pump and then enters an acid-resistant nanofiltration membrane, the acid-resistant nanofiltration membrane separates monovalent and divalent ions in the regeneration waste liquid, divalent and multivalent ions enter a waste liquid pool along with concentrated brine of the acid-resistant nanofiltration membrane and then enter a wastewater treatment unit, monovalent cations directly enter a second security filter along with produced water of the acid-resistant nanofiltration membrane, the produced water is pressurized by a second high-pressure pump and then enters a reverse osmosis membrane for concentration treatment, produced water of the reverse osmosis membrane enters a desalting pool and then enters a recycling pool through the concentrated water side of the reverse osmosis membrane, and water in the recycling pool is used for the regeneration of the cation bed or the sodium bed. By means of the recycling process, the amount of the waste liquid is reduced to a great degree, and a lot of cost is reduced for the the subsequent treatment of the concentrated brine.

The invention discloses a method for synthesis of cryolite from tetrafluoro aluminum sodium, and belongs to the technical field of inorganic fluorine chemical industry. The technical scheme of the method is as follows: first, grinding uniformly a certain amount of tetrafluoro aluminum sodium and sodium fluoride to obtain a grey solid mixture; secondly, putting the grey solid mixture in a muffle furnace for calcining, controlling the calcination temperature and calcination time to obtain calcined product cryolite, then cooling to 300 DEG C and keeping constant temperature for 30min to improve the physical properties of the cryolite; finally, removing silicon with hydrofluoric acid with the concentration of 4% to obtain a qualified cryolite product. The product synthesis method can be implemented and realized by use of equipment in the prior art by large-scale industrial production verification.