36results about How to "Achieving Recovery" patented technology

The invention discloses a green synthesis method of tetramethyl biphenyl isomer compounds. By using a green environment-friendly solvent cycloalkyl methyl ether with the boiling point of higher than 106 DEG C, which is insoluble with water, as a reaction solvent, halogenated o-xylene as a raw material, magnesium metal as a reducer and transition metal nickel, cobalt, palladium, copper, iron, manganese salt or the like or complex thereof as a catalyst, 3,3',4,4'-tetramethyl biphenyl, 2,3',3,4'-tetramethyl biphenyl and 2,2',3,3'-tetramethyl biphenyl isomer compounds are prepared. The yield of the tetramethyl biphenyl isomer compounds is 85-95%, and the cyclic utilization ratio of the cycloalkyl methyl ether is up to higher than 90%.

The invention discloses a method for producing agglomerates from complex nickel-containing wet materials, comprising: ingredients: mixing complex nickel-containing wet materials with coke powder, cement, and iron powder to perform aging interpenetration reaction to obtain premixed aging ingredients ; Granulation: Send the premixed aging ingredients into a granulator for granulation to obtain granular materials with a particle size of 30-50 mm; Sintering: Send the granular materials into a sintering furnace for sintering to obtain sintered blocks. The method of the invention can produce high-strength massive nickel-containing materials, creating favorable conditions for subsequent smelting and recovery of valuable metals to improve production efficiency and reduce production costs.

The invention provides a desulfurization wastewater treatment method. The desulfurization wastewater treatment method comprises the following steps: pretreating desulfurization wastewater to obtain primarily clarified liquor, enabling the primarily clarified liquor to enter a softening reactor A, and regulating pH value to be 10-11; enabling producing water of the softening reactor A to enter a softening reactor B, and then treating by virtue of a microfiltration membrane system; regulating pH value of producing water of a microfiltration system to 6-7, enabling microfiltration producing water to enter a nanofiltration membrane system A, and separating to obtain nanofiltration A fresh water and nanofiltration A concentrated water; enabling the nanofiltration A fresh water and the nanofiltration A concentrated water to respectively enter four water passageway units of a four-compartment electrodialyzer, and carrying out ion recombination on ions in each water passageway unit by virtue of electric drive. The desulfurization wastewater treatment method provided by the invention has the advantages that salts easy to scale in the wastewater are recombined to form soluble salts difficult to scale, so that the difficulty of scaling of follow-up electrodialysis equipment or a high pressure reverse osmosis system is solved; and then the content of total dissolved solids in the wastewater is controlled to be 8-16% by virtue of concentration of the nanofiltration membrane system, an electrodialysis system or the high pressure reverse osmosis system, and the recovery rate of 80-90% of the wastewater is realized.