6results about "Zinc sulates" patented technology

The application discloses a method for deeply removing organic matters in zinc sulfate solution, and belongs to the technical field of zinc hydrometallurgy. An oxidizing agent is added into the zinc sulfate solution, and the adding amount is 13-18 g / L; the solution is stirred and oxidized at 80-85 DEG C for 5-5.5 h. A neutralizing agent is added into the oxidized solution to increase the pH value of the solution to 5-5.5, and a solid-containing suspension is obtained by stirring. A flocculating agent is added into the solid-containing suspension, and the adding amount is 1-1.5 g / L; after stirring for 50-70 min, solid-liquid separation is carried out, and supernatant is obtained. An adsorbent is added into the supernatant, and the adding amount is 2.5-3.5 g / L; after stirring at 75-85 DEG C for 100-150 min, solid-liquid separation is carried out, and the purified zinc sulfate solution after removal of organic matters is obtained. The method adopts the synergistic treatment of oxidation, neutralization and co-precipitation, flocculation and adsorption, and can reduce the content of organic matters in the solution to below 80 mg / L through step-by-step conversion and directional removal of the organic matters, and the removal rate of the organic matters reaches more than 51%, so that the deep removal of the organic matters is successfully realized.

This invention discloses a method for producing sulfate from waste acid wastewater, relating to the field of industrial wastewater reuse technology. The method includes the following steps: raw material pretreatment: collecting waste acid wastewater generated from the washing process of non-ferrous metal smelting flue gas, and concentrating it to obtain concentrated acid water; slurrying and leaching: mixing materials containing metal oxides with the concentrated acid water in a certain proportion, and carrying out slurrying and leaching reactions; purification: purifying the leached solution to obtain a purified solution; sulfate preparation: treating the purified solution to obtain a solid sulfate product. This method directly uses waste acid to replace expensive purchased sulfuric acid, significantly reducing the production cost of sulfate. It is particularly suitable when sulfuric acid market prices are high. Conventionally, producing one ton of zinc sulfate consumes 0.43 tons of sulfuric acid, and producing one ton of manganese sulfate consumes 1.23 tons of sulfuric acid. Using this method, sulfuric acid is directly replaced, resulting in significant cost savings.

This invention provides a method for the synergistic recovery of sulfuric acid and copper and zinc from waste acid from copper strip washing, comprising the following steps: S1, waste acid pretreatment; S2, novel bipolar membrane electrodialysis separation; S3, copper-targeted precipitation separation: adding a copper-targeted precipitant to the heavy metal concentrate to form a stable precipitate, followed by filtration and washing to obtain a copper-enriched precipitate; S4, zinc sulfate preparation: adjusting the pH of the filtrate after copper precipitation separation and removing reducing impurities, then evaporating and concentrating to a solution density of 1.4-1.5 g / cm³, cooling and crystallizing, and centrifuging to obtain zinc sulfate crystals, with the mother liquor returned to the evaporation and concentration unit for recycling. This method can achieve efficient recovery and recycling of sulfuric acid, while simultaneously achieving precise separation of copper and zinc ions and the preparation of high-value products, significantly improving the resource utilization efficiency of waste acid and reducing treatment costs.

Provided herein is a method for producing furfural from lignocellulosic biomass or an extract thereof, such as a sugar-rich extract, using a solid zinc sulfate-rich catalyst to catalyze the conversion to furfural. Also provided herein are zinc sulfate-rich catalysts, and methods for producing zinc sulfate and zinc sulfate-rich catalysts from tire carbon black.

The application discloses a method for recovering tin, germanium, copper, zinc and nickel from complex tin-containing raw materials. The method adopts high-temperature sulfuric acid roasting at 400-500 DEG C as a core pretreatment step, and selectively converts germanium, copper, zinc, nickel and arsenic in the raw material into soluble sulfate, while tin is inhibited from dissolving out and is enriched together with antimony, bismuth and lead in a slag phase, thereby realizing efficient source separation of tin from other valuable metals. Tin-containing slag is subjected to fire method (electric furnace and vacuum furnace) smelting to directly recover crude tin and alloy; and the leaching solution is subjected to iron powder replacement to remove copper and arsenic, tannic acid is used to precipitate germanium, hydrolysis is used to precipitate tin, sulfuration is used to precipitate nickel, and evaporation crystallization is used to produce zinc sulfate. The method innovatively combines the advantages of the fire method and the wet method, is particularly suitable for processing complex tin-containing raw materials, has good metal separation selectivity, high comprehensive recovery rate, compact process flow, near-zero discharge of waste water and waste liquid, and has remarkable economic benefits and environmental benefits.

The present disclosure relates to the technical field of batching tanks, and one embodiment of the present disclosure provides a batching tank for zinc sulfate preparation, which comprises a tank body, a stirring motor and a stirring frame, the stirring motor is installed on the top of the tank body, the stirring frame is arranged at the output end of the stirring motor, a flushing assembly is arranged on the top of the tank body, a heating assembly is arranged on the inner wall of the tank body, an outer frame is arranged outside the tank body, a feeding assembly is arranged on the tank body and the outer frame, the feeding assembly comprises a sealing sleeve, the sealing sleeve is arranged in the outer wall of the tank body, a feeding pipeline is movably sleeved in the sealing sleeve, a conveying auger is arranged in the feeding pipeline, and a feeding port is formed in the bottom of the feeding pipeline. Through the above technical scheme, the technical problem that some powdery or small-granular materials are prone to produce dust during pouring, pollute the production environment, cause material loss and increase production cost in the prior art is solved.