40results about How to "Quick and thorough response" patented technology

The invention provides a method for synthesizing lithium bis(fluorosulfonyl)imide. The synthetic method of the lithium bis(fluorosulfonyl)imide is characterized by comprising the following steps: (1) in a nitrogen atmosphere, sufficiently mixing bis(fluorosulfonyl)imide and an organic solvent, and putting a mixture into a reactor with a condenser; sequentially adding lithium fluoride and liquid-state hydrogen fluoride into the reactor and raising the temperature to react; (2) reducing the temperature of a reaction system, and decompressing and displacing by nitrogen to completely remove residual hydrogen fluoride gas, and filtering a reaction solution under the nitrogen atmosphere to remove insoluble matters, so as to obtain filtrate; (3) concentrating the filtrate by utilizing a high-vacuum decompression and desolvation method; (4) cooling a concentrated solution and adding a low-polarity solvent; recrystallizing at low temperature, and filtering and carrying out decompression and drying treatment at 40 DEG C to obtain the pure lithium bis(fluorosulfonyl)imide. The synthetic method has the advantages that used reagents are cheap and easy to obtain, a preparation process is simple, a reaction is rapid and complete, a few of byproducts are produced and are easy to remove, a post-treatment manner is simple and convenient, a product has high purity and the synthetic method is very suitable for industrial production.

The invention discloses a method for preparing glycolic acid from glycerinum. Glycerinum used as a raw material and water used as a solvent undergo an oxidative degradation reaction in the presence of an oxidizing agent and a stabilizing agent under the condition of UV-irradiation, so as to obtain glycolic acid. The stabilizing agent is a zinc compound. According to the invention, peroxide is decomposed through ultraviolet light to generate free radical simultaneously with cooperation of the stabilizing agent, so as to realize selective regulation and control of the product. Steps for preparation of the glycolic acid by the above method are simple, heating and compression are not required, and the method is easy to control. The oxidizing agent and the stabilizing agent used in the invention are low-cost, and no organic solvent is needed in the degradation process. Under the mild condition, preparation conversion of the product is realized. In comparison with a present conversion method of a micromolecular raw material from a petroleum-base source, the method provided by the invention has obvious advantages. The method is a green, environmentally-friendly, efficient and economical glycolic acid production method which has huge potential.

The invention discloses an energy-efficient and environment-friendly novel diaminodiphenyl ether production line. The production line comprises three parts including main material adding, production flow and product production and four links including condensation reaction, reduction reaction, refined purification and crushing and packaging. The production line is characterized in that a solvent and a catalyst which are low in toxicity, efficient and reusable and the sealed flow without air and impurities are used to prepare 4, 4'-diaminodiphenyl ether with the purity being not lower than 99.9%. Compared with the prior art, the production line is simple in structure, few in reaction links, low in time consumption, high in efficiency, high in solvent and catalyst repeated reaction rate, low in pollution discharge, low in toxicity, capable of saving energy, environmentally friendly, safe, low in cost, and the like.

The invention provides a phosphate ore acid waste water recycling equipment, comprising a frame, a waste water tank is fixedly connected to one side of the top of the frame, a filter box is connected to the other end of the first connecting pipe, and the bottom end of the first sewage receiving tank is connected to the frame. Fixed connection, there is a push mechanism inside the filter box and on one side of the grille, a dredging mechanism is installed inside the filter box and corresponding to the first connecting pipe, and the other end of the second connecting pipe is connected to the neutralization box , the inside of the neutralization tank is equipped with a stirring mechanism, the other end of the third connecting pipe is connected with a sedimentation tank, the top of one side of the sedimentation tank is fixedly connected with a water outlet detection mechanism, and the front side of the frame is fixedly connected with a controller. The beneficial effect is: make the neutralization reaction more fully, through the rotation of the stirring blade, the through hole increases the reaction contact area, makes the reaction more rapid and thorough, improves the reflection efficiency and effect, and performs filtration and Monitoring increases the quality of wastewater treatment.

A process for treating the sewage generated by preparing acetylene from calcium carbide includs such steps as adding the solution of the Fe salt, Zn salt and Cu salt to the sewage to make the pollutants become metal compounds, depositing, acid hydrolyzing to generate H2S gas and the solution of Fe salt, En salt and Cu salt, spraying NaOH solution to absorb H2S and generate sodium sulfide (or hydrosulfide), and reusing said solution to treat sewage.

A method of removing carbon in a copper-containing molten iron by using a vortex to draw in limestone. The method belongs to the technical field of metallurgy, and comprises the specific steps of: (1) feeding copper-containing molten iron, obtained by adding a carbonaceous reducing agent into copper slag for reduction, and ensuring that the temperature is ≥1450°C, into an induction furnace; (2) centrally stirring the copper-containing molten iron to form a vortex with a height-diameter ratio of 0.5 to 2.5; (3) spraying limestone powder into the center of the vortex while the central stirring continues, and performing eccentric stirring after the limestone powder has been sprayed so as to allow more homogeneous mixing of generated CO2 in the vortex; (4) enabling the limestone powder to be directly drawn into the molten iron by the vortex to fully react with the molten iron and to obtain decarbonized copper-containing molten iron and molten slag; and (5) discharging the decarbonized copper-containing molten iron and the molten slag in different layers. The method is simple, requires little investment, is capable of saving energy and protecting the environment and is low in cost, has high economic value, achieves decarbonization, and protects a copper element in the copper-containing molten iron against loss through burning.

The invention discloses a preparation method of a thifluzamide key intermediate, namely 2,6-dibromo-4-(trifluoromethoxy)aniline. The method comprises the following operating steps: (1) adding water into a reaction bottle, dropwise adding concentrated sulfuric acid under the stirring condition, putting metal bromide and a catalyst, adding 4-trifluoromethoxyaniline and stirring for 30 minutes; (2) dropwise adding hydrogen peroxide at 30 DEG C, controlling the dropwise adding speed to enable the reaction temperature to be slowly increased to 50 DEG C, controlling the temperature of the reaction bottle by cooling liquid at 50 to 55 DEG C, continuously adding the hydrogen peroxide dropwise, and performing heat-preserving reaction at 50 to 55 DEG C for 2 to 3.0 hours after addition; (3) after the reaction, adding water and stirring, and filtering to obtain white-like 2,6-dibromo-4-trifluoromethoxyaniline. The synthesis method provided by the invention has the characteristics of environmental friendliness, safety, no three wastes, high synthesis yield and high product quality.

A method for preparing copper-chromium-containing wear-resistant cast iron by reducing molten depleted copper slag is carried out according to the following steps: (1) depleting the molten copper slag at a temperature of 1200-1250 ° C; discharging the remaining slag as a raw material for melting body; or use the molten copper slag after depletion treatment as the raw material melt; (2) heat up to 1400-1450°C, stir with the stirring paddle, and form a molten pool with centrifugal vortex in the reduction furnace; (3) spray The reducing agent is used for vortex reduction smelting; the slag is discharged; (4) ferrochrome alloy is added for quenching and tempering smelting and casting. The method of the invention has the advantages of quick and thorough reaction, short construction period, simple process, low equipment investment, energy saving, environmental protection, low cost and high economic value.

The invention relates to a treatment method of a heat-treatment tail gas containing a brominated flame retardant material. The method comprises the following steps: heating a reactor and fusing the fused salt in the reactor; diluting the heat-treatment tail gas containing the brominated flame retardant material by utilizing air or oxygen; adjusting the gas intake volume concentration to reach 30% to 90%; and continuously leading the mixed gas into the reactor under the speed rate of 0.1L / min to 0.5L / min. After the reaction is finished, the destruction removal rate of the harmful component in the discharged tail gas can reach 80% to 100%. In the reactor, peroxy ions O2<2->, superoxy ions O<2-> and the like, which are generated by the reaction between the high-temperature fused salt and oxygen, can quickly destroy the brominated organic matter in the tail gas, thereby generating CO2, H2O, NaBr and the like without dioxin and other by-products. The method has the advantages of being rapid and complete in reaction, free of secondary pollution, easy to operate and the like.

The invention provides a polyurea microcapsule and a preparation method thereof. The preparation method comprises the following steps: (1) adding an organic phase containing diphenylmethane diisocyanate to an aqueous phase containing a surfactant, stirring and emulsifying to obtain emulsion A (2) Diethylenetriamine is added to an aqueous solution containing a surfactant to obtain a continuous phase solution B; (3) The continuous phase solution B is added to emulsion A to initiate interfacial polymerization on the oil-water interface to obtain polyurea microcapsules containing suspension. The method of the present invention adopts diphenylmethane diisocyanate, the toxicity and volatility are relatively small, and the impact on environmental hazards and experimental operations is small. The present invention directly adds diethylenetriamine after the emulsion is formed, and the reaction is more rapid and thorough. The efficiency is also higher, so that the cost is further reduced. This method adopts a one-step direct reaction, and the temperature can be controlled at room temperature without further heating, and the energy consumption of the whole process is very low.