50results about How to "Process environment friendly" patented technology

The invention discloses a uniform-hole amine resin and a preparation method and an application method thereof, belongs to the technical fields of decoloring resin synthesis of a novel hole structure, active ingredient separation and purification of a natural plant and the like, and in particular relates to a decoloring resin. The appearance characteristic and hole structure parameters of the uniform-hole amine resin are that the resin is spherical, faint yellow and semi-transparent; the grain diameter of the resin is 0.3 to 0.7mm; and the water content of the resin is 50 to 60 percent. The invention also discloses the preparation method and the application method for the uniform-hole amine resin. In the preparation of the uniform-hole amine resin, a non-good solvent serving as a porogen is not needed in the process of synthesizing the traditional macroporous resin; and a creative double-functional-group functional reagent and a polystyrene resin undergo a secondary crosslinking chemical reaction to generate a uniform-hole mesh structure, which has the structure characteristics of high crosslinking degree and high functional group content. For the decolouring application in plant polysaccharide, the decolouring rate of pigment in a plurality of plant polysaccharide extracts is over 95 percent and the recovery rate of the polysaccharide is over 90 percent only by one operation step, namely, adsorption; and the preparation method has the advantages of environmental-friendly process, low production cost, simple and convenient operation, high decolouring efficiency and suitability for large-scale industrial application.

The invention relates to a method for extracting and recovering precious metal and rare metal from wastes, in particular relates to a method for extracting precious metal and rare metal from wastes generated from electronic products and in the production process of the electronic products. According to the method, Comprehensive ionization equipment is adopted and different acid liquors are used for ionizing according to the chemical properties of different metals, thus realizing the continuous operation; aiming at the mixture liquor of metal ions, sectional nanofiltration membrane permeation is adopted according to the particle size difference of metal ions, and therefore the separation of metal ions with different particle sizes can be realized and the following refined purification technique can be simplified. By the method, the precious metal elements in the wastes can be extracted, the remaining waste plastic and water after extraction can both be recovered, and the resource utilization rate is high.

The invention relates to the field of comprehensive utilization of resources, and in particular relates to a comprehensive utilization method for iron and steel smelting dust washing wastewater. The method comprises the following steps: a) adding a precipitating agent and a flocculating agent into the iron and steel smelting dust washing wastewater to form a suspension; b) performing solid-liquid separation on the suspension, and collecting a solid phase and a liquid phase respectively; c) delivering the liquid phase to a reverse osmosis pre-enrichment system to complete pre-enrichment of alkali metals and chlorine ions and then obtain low salt water and a concentrated salt solution for washing smelting dust; and d) performing freeze drying on the concentrated salt solution to obtain a potassium salt and fresh water. The method realizes comprehensive utilization of the iron and steel smelting dust washing wastewater; the alkali metals and the chlorine ions can be pre-enriched through the reverse osmosis pre-enrichment system and freeze-dried, so that the energy consumption is reduced greatly compared with high salt water evaporation; meanwhile, the pre-enrichment manner has a relatively wide application prospect in the high salt wastewater treatment; the whole process is environment-friendly, economic and efficient.

The invention discloses a method for preparing (R)-[3,5-bi(trifluoromethyl) phenyl]ethanol in a reaction system containing ionic liquid. The method comprises the following steps: with wet mycelium obtained by cultivation of trichoderma asperellum ZJPH0810 as a catalyst and 3,5-bi(trifluoromethyl) hypnone as a substrate, reacting for 6-50 hours under the conditions of 25-45 DEG C and 100-300r/min inside the reaction system composed of amino acid ionic liquid shown in a formula (I) and a phosphate buffer of which the pH value is 5.5-8.0; and separating and purifying the reaction liquid to obtain the product (R)-[3,5-bi(trifluoromethyl) phenyl]ethanol. The amino acid ionic liquid disclosed by the invention has the function of facilitating coenzyme regeneration, and is low in toxicity, green and environment-friendly, renewable and biodegradable; the reaction system containing the ionic liquid is applied to biological catalytic reaction, so that the method is friendly to the environment, and accords with the green development strategy, and the defects that the traditional ionic liquid is poor in biodegradability, nonrenewable and the like can be overcome.

The invention relates to a preparation method for high-purity methylphenyl-dimethoxysilane. The preparation method is characterized in that high-purity methylphenyl-dimethoxysilane is prepared through four-step deacidification. The method comprises the following steps: 1) adding dichloromethyl phenylsilane and a hydrogen chloride absorbent into an alcoholysis enclosed agitation reactor, then slowly adding a mixed liquor of absolute methanol and a catalyst drop by drop, controlling a certain reaction temperature, carrying out reflux deacidification at a certain temperature after completion of dropwise addition, carrying out filtering after complete reaction so as to obtain a crude methylphenyl-dimethoxysilane product and recovering the tail gas--hydrogen chloride gas by using a falling film absorption system for preparation of hydrochloric acid; and 2) adding the crude methylphenyl-dimethoxysilane product into a self-made gradient high-efficiency rectifying tower bottom, controlling rectification temperature for fractionation and recovery of methanol and adjusting a reflux ratio to rectify high-quality methylphenyl-dimethoxysilane with quality reaching an international advanced level. The preparation method for methylphenyl-dimethoxysilane has the advantages of environment friendliness, cyclic utilization of resources, stable process, simple operation and product purity of more than 99.5%.

The invention provides a method for preparing metallic cladding expansion graphite by means of liquid phase technology. The method includes the steps: synthesizing raw graphite into expansion graphite; uniformly mixing anhydrous metal salt with liquid aprotic organic matters at the temperature of 20-100 DEG C to obtain anhydrous metal salt organic suspending liquid; uniformly stirring the expansion graphite with the anhydrous metal salt organic suspending liquid prior to standing for 0-4h; preserving heat for 12-48h at the temperature of 400-700 DEG C in an air isolating manner; and cooling the expansion graphite to obtain the metallic cladding expansion graphite. By the aid of the method, high embedding quantity of metallic elements can be ensured, so that the relative content of metallics in the metallic cladding expansion graphite can be precisely controlled. Compared with a traditional method for preparing metallic cladding expansion graphite by means of solid phase technology, the method is higher in operability, environment-friendly and low in energy consumption.

The invention discloses a system and a method for treating VOCs (Volatile Organic Chemicals) by an excimer optical coupling catalysis means. Removing particles in the industrial waste gas through a dust remover and a Hepa filter screen; after being fully mixed with water vapor and passing through a catalyst layer, O2 and H2O generate active substances such as O3 and. OH free radicals under the synergistic effect of excimer light and a catalyst, then VOCs are thoroughly converted into CO2 and H2O, and finally harmless treatment of industrial waste gas is achieved; a substrate of the catalyst isTiO2 existing in an anatase form, and a cocatalyst is one or a compound of ZnO, SnO2, ZrO2, g-C3N4 and g-C3N4; the utilization rate of energy is effectively improved, the complexity of the system isreduced, and the operation and maintenance costs of the VOCs recovery system are reduced. The method has the characteristics of high treatment capacity, high purification rate and the like, auxiliaryheating equipment is not needed in the operation process, the energy consumption loss of the system can be reduced, the operation cost is reduced, and secondary pollution is avoided.

The invention discloses a method for removing gas-liquid inclusion in quartz sand by using a microwave bursting method. Microwave power is the most significant factor which can affect the removal effect of the gas-liquid inclusion in quartz sand, and the scientific and precise method comprises the following steps: putting primarily purified quartz sand in microwave radiation of which the microwave power is 2100-2700w, and treating for 1-3 hours when the temperature of microwave treatment is kept being 700-900 DEGC. A great number of tests show that the gas-liquid inclusion removal effect of a quartz sand material treated by using the method disclosed by the invention is good, gas-liquid inclusion can be even completely removed, and the high-purity quartz sand can meet the requirement of being a crystal substitute product. The method is good in environmental friendliness, simple to operate, stable and reliable in process and applicable to industrial large-scale production.

The invention relates to a preparation method of a modified polystyrene board. The preparation method comprises the following steps: (1) mixing thermosetting resin with a flame retardant to obtain a binding material; (2) uniformly mixing polystyrene foaming particles with the binding material to obtain a formed material; and (3) adding a curing agent into the formed material, carrying out mixing,and then carrying out mechanical pressurizing forming to obtain the modified polystyrene board. According to the invention, a conventional method of modified polystyrene board secondary foaming and water vapor forming is replaced by the method combining phenolic resin foaming binding with mechanical pressurization, so that the process is simple, polystyrene board wastes can be effectively utilized, zero pollutant emission can be realized, waste polystyrene beads which are difficult to treat are consumed, the cost is reduced, and the environment-friendly process is realized. In a preferable technical scheme, a foaming agent is added into the binding material, so that phenolic resin can be foamed, and the polystyrene board becomes more compact with the matching of mechanical pressure, so that the board has higher strength and heat-preservation performance.

The invention relates to a method for improving a metallurgical-method polycrystalline silicon growth interface. The method comprises the steps: (1) loading polycrystalline-silicon silicon materials to a high-purity quartz crucible, placing the high-purity quartz crucible into a directional solidification furnace, and carrying out vacuumizing until the internal degree of vacuum of the furnace is lower than 10Pa; (2) heating the temperature of the furnace to 1,450 DEG C to 1,550 DEG C so as to melt the silicon materials; (3) carrying out external-field treatment on the silicon materials for 10 to 30 minutes at the magnetic intensity of 0.15T to 0.5T, then, cooling the furnace body at the rate of 5 DEG C/min to 10 DEG C/min, downwards shifting a moving part of the furnace body at the rate of 5mm/h to 10mm/h, enabling silicon melt to be divorced from a heater and start to grow crystals, and closing a magnetic field when the temperature is 1,100 DEG C to 1,200 DEG C; and (4) after crystal growth, enabling the moving part of the furnace body to rise to an initial position in a furnace chamber at the rate of 2mm/s to 4mm/s, then, heating the temperature to 1,250 DEG C to 1,350 DEG C, carrying out heat preservation for 2 to 5 hours, and then, carrying out cooling at the cooling rate lower than 4 DEG C/min. According to the method, the form of a solid-liquid interface in a silicon material growth process is regulated and controlled by adopting an external static magnetic field, so that a smooth solid-liquid interface is obtained, ideal columnar crystal grain tissue is obtained, and the quality of silicon ingots is improved; and the process is more environmentally friendly, is compatible with the existing technologies of enterprises and is applicable to large-scale production.

The invention relates to a bio-ene charcoal material and a preparation method thereof. According to the invention, a powdery biomass raw material is impregnated with a mixed water solution of phosphoric acid and sulfate; filtering is carried out, and the obtained material is dried by dipping; the material is activated for 60-150min under a temperature of 200-500 DEG C in a protective atmosphere; the activated biomass raw material is heated to a temperature of 1000 DEG C in a protective atmosphere, and the temperature is maintained for 10-40min; the material is heated to a temperature of 1200-1400 DEG C, and the temperature is maintained for 10-30min, such that the biomass raw material is catalytically charred, and an intermediate product is obtained; the obtained intermediate product is cooled, and is washed with ultrapure water; filtering is carried out, and the obtained product is dried; a mixed water solution of hydrochloric acid and/or hydrofluoric acid and ethylenediaminetetraacetic acid is used for dusting and for carrying out an activation treatment for 60-120min; filtering is carried out; and the obtained material is heated and dried, and is crushed, such that the bio-ene charcoal material is obtained. The XRD diagram of the material shows diffraction peak at 26 DEG, such that the material is a charcoal material with a graphitized structure. The material has the characteristics of high specific surface area, developed cavities, good conductivity, high electrochemical activity, and good charge and discharge stability.

The invention relates to an ion exchange resin purification method for alkaloids, belonging to the technical field of ion exchange resins. The present invention adopts macroporous cation exchange resin resin method to separate and purify the alkaloid effective components in Chinese herbal medicine, so that the alkaloid can be purified. Compared with the traditional process, the purification process is simple and feasible, the production efficiency is high, the product yield is high, and the process environment is friendly. , low production cost and other advantages.