90results about How to "The recovery method is simple" patented technology

The invention discloses a recycling method for high-salinity wastewater containing sodium chloride and sodium sulfate and belongs to the field of wastewater treatment. The method comprises: filtering wastewater through a nanofiltration membrane; performing evaporative crystallization on filtrate through the nanofiltration membrane to obtain sodium chloride and filtered mother liquor; performing evaporative crystallization on retained liquor which does not pass through the nanofiltration membrane to obtain sodium sulfate and retained mother liquor; mixing the filtered mother liquor with the retained mother liquor to obtain a mixture and adding fluosilicic acid into the mixture; and stirring sufficiently the mixture to obtain sodium fluosilicate by filtering. Filtered acid water is used in pH value adjustment of a system before biochemical treatment.

The invention discloses a method for preparing graphene by a low-temperature chemical reduction method, which belongs to the technical field of chemical composition of graphene. In the method, graphene oxide prepared by chemical oxidation is used as a raw material. The method comprises the reduction reaction step of reducing the graphene oxide into graphene; in the reduction reaction step, aluminum iodide is used as a reducer; the reduction of the graphene oxide is realized by controlling the concentration of the reducer and a solvent type at 60 DEG C to 180 DEG C; oxygen-containing functional groups (epoxy group, hydroxyl group, carboxyl group and carbonyl group) on the graphene oxide are removed; the electric conductivity of the graphene is recovered more thoroughly; and the graphene isprepared. The method provided by the invention is a method for preparing the graphene by a low-temperature chemical method, which is suitable for large-scale industrial production. The method has theadvantages of low reduction temperature, mild and controllable reaction, more thorough reduction, environmental-friendly performance, suitability to industrial production, etc.

The invention discloses a process for preparing graphene by a cryochemical method, belonging to the technical field of chemical synthesis of graphene. The process uses graphene oxide prepared by chemical oxidation as a raw material, and comprises the step of reducing reaction in which graphene oxide is reduced into graphene. The reducing reaction step implements reduction of the graphene oxide at80-150 DEG C by using sodium borohydride as a reducer by the aid of a catalyst, oxygen-containing functional groups (epoxy group, hydroxy group, carboxy group and carbonyl group) on the graphene oxide are removed, and the electric conductivity of the graphene is thoroughly recovered, thereby preparing the graphene. The process disclosed by the invention is suitable for large-scale industrial production. The process has the advantages of low reduction temperature, mild and controllable reaction, thorough reduction, environment friendliness and the like, and is suitable for industrial production.

The invention belongs to the technical field of bioengineering and relates to a solid-liquid separation method of yeast-derived recombinant protein fermentation liquor. The solid-liquid separation method is characterized in that the yeast-derived recombinant protein fermentation liquor is added with soluble inorganic salt and a hydrophilic organic solvent and fully stirred, the pH value of a system is regulated by regulating the proportion of the salt, the hydrophilic organic solvent and the fermentation liquor, the operation temperature is controlled to form aqueous a two-phase, an upper phase is an extract phase rich in the recombinant protein, a lower phase is a raffinate phase containing thallus; and the recombinant protein, the organic solvent in the extract phase and the inorganic salt in the raffinate phase are respectively separated and recovered. The solid-liquid separation method solves problems of hard thallus removal, high cost and the like in the existing technology for producing the recombinant protein by a fermentation method, is characterized by good separation effect, short separation time, low cost and being easily enlarged by industrialization, and is the solid-liquid separation method of the yeast-derived recombinant protein fermentation liquor with industrial application prospect.

The invention relates to a recovery method of an N-methylmorpholine oxide (NMMO) solvent in a process of generating regenerated protein fibre by a solvent method in a spinning technology. The technical scheme of the invention is designed as follows: NMMO aqueous solution with the mass concentration of 50% is taken as a coagulating bath of the regenerated protein fibre; the circulation of the coagulating bath is optimally controlled so that the mass concentration of the coagulating bath of the NMMO aqueous solution in a coagulating bath-loading container is controlled to be 50%; and multiple impurities in recovery liquid, namely a coagulating bath solution, are removed through rough filtration, microporous membrane microfiltration, anion exchange resin treatment, cation exchange resin treatment and hydrogen peroxide oxidization, thereby achieving the recovery of the NMMO solvent.

The invention relates to a C2 axisymmetric chiral bisoxazoline ligand compound containing an imidazole salt ion pair group, and preparation and application thereof. The structural general formula of the compound is disclosed in the specification. The process of the preparation method of the compound is disclosed in the specification. The compound can be made into a copper, zinc, magnesium, ferrum or nickel complex catalyst, and used for catalyzing asymmetric Diels-Alder reaction and asymmetric Henry reaction. The compound is easy to prepare, has favorable catalytic performance and recovery performance, and can react with metals to form a complex chiral catalyst; and the catalyst has high activity and selectivity, and the activity and selectivity do not degrade after the catalyst is recovered fifteen times.

The invention belongs to a method for recycling a sodium molybdate solution from purified molybdenum contained silica slag in the molybdenum smelting process, which comprises the steps of mixing and pulping the molybdenum contained silica slag, water and phosphoric acid, undergoing boiling reaction under the condition of controlling the pH value of pulp; and then carrying out solid-liquid separation and cleaning to obtain the sodium molybdate solution. In the invention, only the phosphoric acid is used as a disintegrant of insoluble molybdate, and the reaction is conducted at boiling temperature and normal pressure, thus more than 95% of molybdenum can be recycled from the slag in a form of sodium molybdate solution. The invention has the characteristics of simple recycling method, high efficiency, no waste water exhaust, low recycling cost and the like.

The invention discloses graphene oxide ink as well as a preparation method and application thereof. The graphene oxide ink is prepared from graphene oxide, surfactant and solvent as raw materials, and counted by mass fraction, the graphene oxide accounts for 0.1%-0.5%, the surfactant accounts for 0.05%-0.5% and the rest is solvent. The preparation method comprises steps of dispersing the graphene oxide in the solvent, adding the surfactant to obtain a mixed solution, and carrying out filtering with a micro-filtration membrane to obtain the graphene oxide ink. The graphene oxide ink can be applied to an inkjet printer, and particularly can be used for preparing a graphene flexible circuit through an inkjet printer. The graphene oxide ink and the preparation method thereof disclosed by the invention have the advantages of greenness, environment protection, low cost, simple preparation and the like, and the graphene oxide ink applied to a common home inkjet printer can meet the market requirement.

The invention discloses a method for recovering cefprozil from cefprozil crystallization mother liquor. The method is characterized in that the absorption, desorption and crystallization treatment is performed on the cooled cefprozil crystallization mother liquor by adopting macro-porous resin, and the purified cefprozil is recovered. The method comprises the following steps: by utilizing the macro-porous resin, in combination with the cooperation of the adsorption conditions of specific pH, temperature and flow rate and the desorption conditions of certain pH, temperature and flow rate of a specific analytical solution, effectively absorbing and efficiently desorbing the cefprozil remaining in the efprozil crystallization mother liquor through the macro-porous resin and recovering; finally de-coloring, crystallizing, filtering and drying the analytical solution to obtain a high-purity cefprozil product conforming to qualified product standard requirements. The method disclosed by the invention is high in recovery rate, simple and convenient to cooperate, low in cost, green and safe; and the residue of the cefprozil in the cefprozil crystallization mother liquor after recovery treatment is less than or equal to 1 mg/ml, so that the COD value of wastewater can be effectively reduced, and the environmental protection pressure and the wastewater treatment cost are reduced, and therefore, the economic and social benefits are significant.

The invention relates to a temperature-sensitive gel type heavy metal curing agent, a heavy metal contaminated soil curing and repairing method and a curing agent recycling method. The temperature-sensitive gel type heavy metal curing agent is a mixed water solution of a synthetic polymer material and a natural polymer material; the concentration of polymer materials in the mixed water solution is0.5 to 2 percent, and a mass ratio of the synthetic polymer material to the natural polymer material is (1 to 4):(6 to 9). Raw materials used by the temperature-sensitive gel type heavy metal curingagent disclosed by the invention are low in cost, are safe and efficient and are strong in targeting ability; a using method is simple and easy; secondary pollution to soil cannot be caused after thetemperature-sensitive gel type heavy metal curing agent is put into use for a long term, and the temperature-sensitive gel type heavy metal curing agent can be repeatedly recycled and utilized; a recycling method is simple and easy and has a wide application prospect in heavy metal contaminated soil repairing.

The invention relates to the technical field of electroplating equipment and in particular relates to a recycling device and a rcycling method of electroplating drop liquid generated in the electroplating workpiece and rack conveying and transferring process. The device comprises at least one electroplating bath, a control mechanism, a conveying mechanism used for lifting an electroplating workpiece, a dropping water collection mechanism, an automatic water supply cleaning mechanism and a sectioned water receiving ditch, wherein the dropping water collection mechanism is positioned above the electroplating bath; the conveying mechanism is positioned above the dropping water collection mechanism; the dropping water collection mechanism comprises a water dropping disc and a transmission mechanism used for driving the water dropping disc to horizontally move; the automatic water supply cleaning mechanism is connected with the water inlet of the water dropping disc; the sectioned water receiving ditch is connected with the water outlet of the water dropping disc; and the conveying mechanism, the transmission mechanism and the automatic water supply cleaning mechanism are respectively and electrically connected with the control mechanism. According to the device and method disclosed by the invention, the electroplating drop liquid generated in the electroplating workpiece and rack conveying and transferring process can be effectively recycled, the outlet loss of electroplating materials is effectively reduced, and the load of wastewater treatment is reduced.

The invention discloses a sea surface target adaptive polarization detection device and method for suppressing solar flare, relates to the technical field of optical communication and the technical field of optical sensing, and solves the problem of relatively few technologies for suppressing sea surface flare by using a polarization mode. The device comprises a polarization camera, a computer, a stepping motor, a polaroid and a digital domain TDI-CMOS camera. The polarization camera detects part of polarized light reflected by a sea surface target, an original image with the angle and intensity of the part of polarized light is sent to the computer, the main polarization direction of reflected light of the sea surface target is obtained through calculation of the computer, and the computer controls the stepping motor. Enabling a polaroid installed on the digital domain TDI-CMOS camera to be perpendicular to the main polarization direction of reflected light of the sea surface target, collecting a polarization image of the sea surface target by the digital domain TDI-CMOS camera, and processing the image. According to the invention, the influence of the solar flare on the image can be obviously weakened; the structure is compact and use is simple; the recovery method is simple; processing is easy, and industrialization is facilitated.

The invention discloses a motion information collection system for a rowing athlete. The system comprises a collection module, a first communication module, a second communication module, a main control module and an intelligent terminal; the collection module is used for collecting motion information of the athlete, and the motion information is transmitted to the main control module through thefirst communication module; the main control module is used for parsing and restoring the received information into motion posture information of the athlete and is in communication with the intelligent terminal through the second communication module. According to the system, the athlete only needs to wear the collection module, the motion information of the athlete can be collected, it is not necessary to refit equipment such as a ship body and paddles, and the cost is reduced. The invention further discloses a motion posture restoring method for the rowing athlete. By means of the method, the collected motion information of the athlete can be parsed and restored into the motion posture information of the athlete, the method principle is simple and efficient, the motion posture information can be displayed in real time through the intelligent terminal, and long-distance monitoring for the athlete can be achieved precisely.