230results about How to "Reduce solid waste" patented technology

A method and apparatus, in one example, relates to a system and method for the generation of very low-tar, high-energy synthesis gas from a large variety of carbonaceous feedstock, including those with higher moisture levels than conventional gasifiers. The system comprises a gasification reactor wherein a portion of the energy of the output syngas of the reactor is used to heat the gasification zone of the reactor via an annular space surrounding the gasification zone of the gasifier, to maintain a temperature condition above 800° C. The maintenance of a long, quasi-uniform high-temperature gasification zone reduces the amount of input air or oxygen, reduces bridging within the gasifier, cracks pyrolysis oils, increases the conversion of char, minimizes heat losses from the bed, and converts moisture within the packed bed into a gasification medium. This results in a very low tar synthesis gas with less nitrogen dilution and higher energy content than conventional gasifiers. The reduction in bridging reduces operating costs.

The invention discloses a preparation method of 2-chloro-5-tirfluoromethylpyridine. The invention provides a preparation method of 2-chloro-5-tirfluoromethylpyridine, and the preparation method comprises the following steps of: reacting 2-chloro-5-trichloromethylpyridine with hydrogen fluoride in a closed system in the presence of a catalyst to obtain the 2-chloro-5-tirfluoromethylpyridine, wherein the catalyst is antimony trioxide and/or antimony pentoxide. The invention further provides a preparation method of a compound 2, and the preparation method comprises the following steps of: reacting a compound 3 with ammonia in the presence of alkali to obtain the compound 2. The preparation method provided by the invention is cheap and liable to obtain raw materials, low in cost, few in reaction by-products, simple in post treatment, safe to operate, environment-friendly and suitable for large-scale industrial production.

The invention provides a method for synthesizing a nano selenium material and relates to the application technology of selenium resources. The method includes the following steps: in an environment with a temperature of 0+/-1 DEG C, mixing an ethanol solution of sodium borohydride with selenium powder while stirring the mixture, adding a mixture composed of sugar, lautyltrethylammonium bromide and diethyldiisopropylammonium bromide in the mixture, and then obtaining a mixture system; increasing the temperature of the mixture system to 20-60 DEG C under a stirring condition for a reaction, obtaining a precipitate after the reaction is completed, conducting suction filtration and then calcinating the precipitate at 450-550 DEG C to obtain the nano selenium material. Compared with a traditional synthesis method, the method has simple and little reaction steps, raw materials are easy to obtain, solid waste is little, the corrosivity is low, and the method is environmentally friendly and is suitable for mass production.

The invention belongs to the technical field of industrial waste treatment, and particularly relates to a resource recycling process and system for high-temperature plasma of chlorine-containing waste. The method comprises the steps that (1) the chlorine-containing waste is conveyed into a plasma gasifier through a feeding system; (2) synthesis gas produced through splitting decomposition is cooled by a first-stage waste heat exchanger; (3) after entering an acid absorption system to absorb acid, the synthesis gas enters an alkaline tower to be further deacidified; (4) the deacidified synthesis gas enters a secondary combustion chamber to be combusted, and generated high-temperature flue gas is cooled by a second-stage waste heat exchanger; (5) after the cooled flue gas enters a quench cooler to be subjected to quenching, the flue gas enters a bag-type dust remover for dust removal; (6) the flue gas with dust removed enters a flue heater to be warmed; (7) the flue gas enters an SCR catalytic tower to remove nitric oxide in the flue gas; and (8) after the flue gas subjected to SCR treatment enters the heat exchanger for heat exchange, the flue gas is drawn out by an induced draft fan, and the flue gas is discharged into the atmosphere through a chimney. By means of the resource recycling process and system, resource, harmless, reducing and stabilizing treatment of the chlorine-containing waste is achieved, and the system operation cost is low.

The invention discloses a preparation method of antitumor drug AZD9291. The method is as follows: reaction of 4-fluoro-2-methoxy-5-nitroaniline and 3-(2-chloro-pyrimidine-4-yl)-1-methylindole to obtain an intermediate 1; reaction of the intermediate 1 and N, N, N '-trimethylethylenediamine to obtain a compound intermediate 2; hydrogenation reduction of the intermediate 2 to obtain a compound intermediate 3, further introduction of acryloyl group into the intermediate 3 to obtain the AZD9291, and the method is characterized in that activator cuprous bromide is added into the preparing process of the intermediate 2; palladium carbon is used for catalytic hydrogenation reduction, and a mixed anhydride solution of acrylic acid is used for introduction of the acryloyl group of the AZD9291. The method effectively reduces waste solid generation, and improves the purity and the yield of the product.

The invention discloses a method for preparing 2-chloro-5-chloromethylthiazole by a jet loop reactor, and relates to the technical field of synthesis of the 2-chloro-5-chloromethylthiazole. The jet loop reactor comprises an ejector, wherein the ejector is arranged at the upper part of the reaction kettle; a lower outlet of the reaction kettle is communicated with an inlet of a circulating pump; an outlet of the circulating pump is communicated with the inlet of a heat exchanger; the outlet of the heat exchanger is communicated with the top inlet of the ejector; an air inlet pipe is arranged on the side surface of the ejector; 1-isothiocyano-2-chlorine-2-propylene is dissolved into an inert organic solvent to prepare a liquid-phase material; the liquid-phase material is added to the reaction kettle, and enters from the top inlet of the ejector after passing through the circulating pump and the heat exchanger; chlorine enters the ejector through the air inlet pipe and is mixed with the liquid-phase material; the mixed material passes through the reaction kettle, the circulating pump and the heat exchanger and then returns to the top inlet of the ejector; circular reaction is carried out until the chlorine is introduced; a 2-chloro-5-chloromethylthiazole product is obtained after post-treatment. The method disclosed by the invention is high in yield, few in solid wastes and high in production efficiency; the reaction temperature is easy to control.

The invention discloses a fluoride removal method of graphite purification waste water and a processing system. The fluoride removal method comprises the step that the graphite purification waste water is subjected to diffusing dialysis, so as to recover acid therein. Diffusing dialysis processing liquid is neutralized and filtered through two steps, and obtained neutralized filter liquor is in contact with a fluoride removal filter material to remove fluoride, so that fluorine content in obtained effluent reaches the standard, and the effluent reaches the effluent standard. The waste water continuously runs in the processing system, and effluent obtained by processing is recycled in the system. By adopting the processing method provided by the invention, through applying the processing system provided by the invention, not only can the fluoride in the waste water can be effectively removed, but also the waste water processing cost can be obviously reduced, the whole system runs stably, and the operation is simple. Continuous and automatic running can be realized.

The invention provides a device and a method for electrochemically preparing high-purity battery-grade lithium hydroxide. The device comprises two electrocatalytic electrodes and two separators, particularly an oxidation electrode (100), a hydrogen production electrode (200), an anion exchange membrane (300) and a cation exchange membrane (400); wherein the oxidation electrode (100) and the anionexchange membrane (300) form an anode tank; the hydrogen production electrode (200) and the cation exchange membrane (400) form a cathode tank; the device further comprises a lithium removal tank; thelithium removal tank is connected with the anode tank through the anion exchange membrane (300); and the lithium removal tank is also connected with the cathode tank through the cation exchange membrane (400). Compared with the prior art, the method and the device have the following technical effects: (1) electro-catalytic organic matter oxidation, electro-catalytic hydrogen evolution reduction and electro-lithium removal are combined for the first time; the whole system realizes simultaneous preparation of three products which are lithium hydroxide, hydrogen and acid.

The invention discloses a UV paint exhaust gas treatment system. The UV paint exhaust gas treatment system comprises a UV spray inlet, a UV tank, an active carbon catalytic combustion tank, an active carbon tank, a high-altitude exhausting chimney, a plurality of ultraviolet lamps, a filter bag, and a catalytic decomposition bed; the active carbon tank and the active carbon catalytic combustion tank are arranged in parallel via a technical pipeline; the active carbon catalytic combustion tank is provided with a desorption fan, the catalytic decomposition bed, and a flame arrester; the ultraviolet lamp and the filter bag are arranged in the UV tank; the ultraviolet lamps are arranged at the front segment of the UV tank; the filter bag is arranged at the back segment of the UV tank. According to the UV paint exhaust gas treatment system, ultraviolet ray irradiation is adopted for curing of viscous UV particles via ultraviolet lamp irradiation, and the filter bag is used for removing UV particles; VOC in exhaust gas is absorbed by active carbon; the UV paint exhaust gas treatment system is provided with the active carbon catalytic combustion tank for low temperature regeneration of active carbon; treatment efficiency is as high as 97%, and is higher than that disclosed in national exhaust gas discharge standards.

The invention relates to a preparation method and system of mono-isocyanate. According to the method, an excessive amount of phosgene is subjected to phosgenation reaction with corresponding amine, and after obtained reaction liquid is subjected to gas stripping through hydrogen chloride and phosgene is removed, the fact that the phosgene is completely separated with isocyanate is realized, and the purpose that the excessive amount of phosgene can be recycled is achieved. Pyrolysis gas obtained by performing pyrolysis on reaction liquid with phosgene being stripped is captured through an inertsolvent, solution of corresponding isocyanate is obtained, and qualified isocyanate can be obtained through subsequent separation. A process for preparing mono-isocyanate through the method has the characteristics of high yield and low solid waste amount.

The invention relates to a high efficiency extraction method of T-acid mother liquor, and belongs to the field of an H-acid production waste water treatment. Tri(octyl-decyl)amine, sulfonated kerosene and n-octyl alcohol are respectively measured and uniformly mixed for obtaining an extractant, the extractant is thrown into the T-acid mother liquor, a heating stirring is carried out, simultaneously sulfuric acid is added, after stirring, standing and layering, the upper layer is an extract, and lower layer is an inorganic salt water phase; after the lower layer inorganic salt water phase is separated, the upper layer extract is heated, sodium hydroxide is added, after stirring and standing, the oil and water separation is carried out. The invention is applied into the H-acid production, thereby avoiding generation of solid waste with simple operation and effectively reducing the production cost.

The invention discloses a production method for trioctyl trimellitate. In order to control the quality of trimellitic anhydride serving as a raw material, nitrogen protection is adopted during a production process; a small amount of titanate-like catalyst is added under the conditions that a secondary esterification reaction is completed and water serving as a reaction by-product is removed so that the esterification reaction is performed completely, and the product standards of the synthesized product can meet the requirements of a superior product in the index aspects, such as the chromaticity and the acid value, without being absorbed and de-colored by activated carbon without neutralizing or only by adding a small amount of neutralizing agent; therefore, the problems that the chromaticity is influenced by the existence of tiny activated carbon particles and the addition of a large amount of the neutralizing agent and a large amount of salt residues in the product of the product in downstream application are avoided. When the raw material purity of the trimellitic anhydride is not high, or the acid value of the product exceeds the standard slightly caused by the reasons that acid regurgitation appears in the process of adding water to break the titanate-like catalysts and the like, and remediation can also be performed through a given post-processing method.

The invention discloses a method for synthesizing 2-nitro-3-methylbenzoic acid. The method comprises that powdery meta-methylbenzoic acid and nitric acid undergo a reaction at -30 to -15 DEG C to produce a nitrification reaction solution, and the nitrification reaction solution is separated and purified to form a 2-nitro-3-methylbenzoic acid product. The method has simple processes, is easy to operate, has a high conversion rate of m-methylbenzoic acid, has high selectivity of 2-nitro-3-methylbenzoic acid, and has obvious environmental protection effects and significant economic benefits.

To provide a method for removing a halogen series gas, which has high capability of treating a halogen series gas, can prevent ignition of an adsorbing agent, is free from formation of carbon dioxide and can reduce generation of wastes, and a removing agent to be used for the method. The method for removing a halogen series gas comprises bringing a gas comprising at least one halogen series gas selected from the group consisting of F₂, Cl₂, Br₂, I₂ and a compound which undergoes hydrolysis to form a hydrogen halide or hypohalogenous acid into contact with a granulated product comprising from 80 to 99.9 mass % of an alkali metal base and from 0.1 to 20 mass % of a thiosulfate based on the total mass of the granulated product, in the presence of water, to remove the halogen series gas.

The invention belongs to the technical field of sodium sulfide production, and particularly relates to a sodium sulfide production method based on waste sodium sulfate generated from metallurgical vanadium extraction. In order to solve the technical problems of high cost, big coal powder consumption, and large amounts of generated slag in the prior art, thus being detrimental to environmental protection, the sodium sulfide production method based on waste sodium sulfate generated from vanadium extraction is provided. The method comprises the steps of A, preparing materials, B, roasting, C, thermalizing and leaching, D, deslagging and clarifying, and E, evaporating and concentrating. The method uses the solid waste sodium sulfate generated from vanadium extraction as the material for a second time use, thus reducing the material cost. The use of fine coke as the reducer to replace the coal powder used in traditional production process, reduces the material consumption. The method applies the production process of material preparation, roasting, thermalizing and leaching, deslagging and clarification, evaporation, concentration and crystallization, and has the advantages of being lower in production cost, friendlier to environment, and able to produce better economic benefits and environmental protection benefits.

The invention discloses an oil-containing sludge incineration system for a pressurized fluidized bed and an incineration treatment method. The process comprises the following steps: introducing preheated pressurized air into a fluidized bed incinerator, adding oil-containing sludge into the incinerator to pressurize and combust under a fluidized state, and supplementing auxiliary fuels to keep a combustion state stable if combustion heat is insufficient; enabling high-temperature pressurized wet flue gas generated in the incinerator to preheat pressurized air for combustion of the fluidized bed incinerator, preliminarily cooling the pressurized air into medium-temperature pressurized wet flue gas; continuously performing dust-removal denitration treatment on the flue gas to obtain medium-temperature pressurized clean wet flue gas, and recycling separated fly ash; recycling sensible heat of the medium-temperature pressurized clean wet flue gas through a waste heat recycling system, andrealizing up-to-standard emission through treatment such as a follow-up decompression system and a dehumidifying system. Reduction, harmless and resource utilization as well as energy conservation andemission reduction are realized on the oil-containing sludge, so that combustion efficiency can be greatly improved, equipment unit area processing ability is improved, and emission of harmful substances in flue gas is reduced.

The invention provides a synthesis method of sofosbuvir. The synthesis method of the sofosbuvir comprises the following steps: performing mitsunobu reaction on ((2R,3R,4R)-3-benzoyloxy)-4-fluorine-5-hydroxyl-4-methyltetrahydrofuran-2-yl)methyl benzoate to produce sulfonate to obtain a compound 1; abutting the compound 1 and N-benzoylcytosine to produce a compound 2. The method adopts mitsunobu reaction to avoid production of an isomer, and the isomer is reduced to 5 percent or below; according to the method, sulfonate and N-benzoylcytosine are abutted, so the use ofa stannic chloride raw material is avoided; furthermore, the yield is high and few solid waste is generated during aftertreatment, so that the method is suitable for large-scale industrialized production.