37results about How to "Achieve deep separation" patented technology

The invention discloses a method for extracting-water-splitting and separating antimony and iron in an antimony-iron mixed solution, belonging to the field of non-ferrous metal metallurgy. The method firstly uses iron powder to reduce high-valent antimony iron ions in an antimony-iron mixed solution to a low-valent iron Divalent iron ion and trivalent antimony ion are filtered and separated to obtain low-valent antimony iron solution, and then use quaternary ammonium salt extractant to extract and separate antimony from it, to obtain antimony-rich organic phase and ferrous raffinate, the latter can be directly opened; The antimony-rich organic phase does not carry out back extraction, but is directly water-decomposed to generate antimony oxychloride, and at the same time, the quaternary ammonium salt extractant is regenerated. The method realizes the separation problem of antimony and iron through valence adjustment and extraction process, and the separation of antimony and iron is complete; and the innovative water splitting step is used to directly complete the dissociation of antimony, which cancels the traditional stripping process and obtains antimony products in one step. and regeneration extraction agent, simplifying the process, reducing the consumption of reagents, and solving the problem of separation and separate utilization of antimony iron solution in the antimony hydrometallurgy process.

The invention relates to a method for deeply separating molybdenum and vanadium in a solution containing the molybdenum and the vanadium. The method includes: regulating the acidity [H<+>] of the solution containing the molybdenum and the vanadium to be 0.0003-10mol / L, and then using the compound of Mo(IV) or / and Mo(V) as the reducing agent to selectively reduce the vanadium in the solution to obtain liquid after reduction; regulating the pH of the liquid after reduction to be 4-7, settling the vanadium, and using an ion exchanging method or extraction method to enrich the molybdenum; or regulating the pH of the liquid after reduction to be 2-4, using an ion exchanging method or extraction method to enrich the molybdenum, then regulating the pH to 4-7, and settling the vanadium. The method has the advantages that the E<0>Mo(VI) / Mo(V) and E<0>V(V) / V(IV) potential differences under an acidic condition are utilized, the compound of Mo(IV) or / and Mo(V) as the reducing agent to selectively reduce the V(V) in the solution into V(IV), and the maximum differentiation of the properties of the molybdenum and the vanadium in the solution is achieved; the property that anion exchange resin or basic extractant can only selectively enrich the Mo(VI) in the solution and cannot absorb the V(IV) is utilized to deeply separate the molybdenum and the vanadium; the method is simple in process, short in process flow, convenient to operate, good in molybdenum-vanadium separation effect, low in treatment cost, environmental friendly, suitable for industrial application, and the like.

The present invention relates to the separation and purification method of by-product sodium chloride in the production process of betaine / betaine hydrochloride, comprising reaction mother liquor pretreatment, preliminary separation of crude betaine and sodium chloride, secondary purification separation and betaine merging and purification, Combined with sodium chloride for purification and refining. According to the method of the invention, it is suitable for industrial large-scale separation and purification, does not need to go through procedures such as electrodialysis, and has higher economy and environmental protection. The purified sodium chloride can reach the feed grade standard, realize the recovery and utilization of by-products, and the treatment method is simple without secondary pollution.

The invention relates to the field of comprehensive utilization of solid waste resources in iron and steel plants, in particular to a method for preparing zinc oxide by wet treatment of zinc-containing smoke and dust in iron and steel plants. Selectively leaching the valuable metals Zn, Pb and Cd in the zinc-containing fumes of iron and steel plants in weak alkaline amino acetate aqueous solution, the leaching solution is reduced and purified with zinc powder to obtain lead and cadmium slag; the purified leaching solution is purified with CaO or Ca(OH )2 carry out alkali adjustment and zinc precipitation to obtain crude zinc oxide, and after the crude zinc oxide is washed with water to remove residual Ca(OH)2, the finished product zinc oxide is obtained after drying; Regeneration, the regenerated leaching agent can be directly returned to leaching. The invention is easy to operate and has a mild leaching system; the aqueous solution of the complexing agent used can be regenerated during the treatment process; it can treat zinc-containing fumes with high iron content and realize the deep separation of iron and zinc; it can effectively remove poisonous zinc-containing fumes from iron and steel plants Heavy metal elements Zn, Pb and Cd can be used to prepare high value-added ZnO products and effectively enrich the valuable metals lead and cadmium.