4results about "Ammonium chloride" patented technology

This invention relates to a method for the resource utilization of ammonia-containing waste generated during beryllium smelting, belonging to the technical field of wastewater and waste residue treatment and resource utilization. The method includes: mixing aluminum ammonium vanadium slag with beryllium washing wastewater; mixing the resulting aluminum ammonium vanadium beryllium solution with a calcium-containing transforming agent to obtain aluminum-calcium slag and aluminum ammonium vanadium purified solution; mixing solution A with beryllium precipitation wastewater and adding a calcium-containing alkaline substance to obtain a conditioning solution and gypsum slag; adding a decalcifying agent to the conditioning solution for precipitation and decalcification to obtain decalcified slag and decalcified solution; stripping the decalcified solution to obtain ammonia water and ammonia stripping mother liquor; solution A is an aluminum ammonium vanadium beryllium solution and / or aluminum ammonium vanadium purified solution; or, mixing the aluminum ammonium vanadium purified solution with beryllium precipitation wastewater and evaporating and crystallizing to obtain ammonium salts. This method fully utilizes the ammonia resources in the ammonia-containing waste generated during beryllium smelting, preparing ammonium salts or ammonia water, achieving full recycling of ammonia nitrogen in the production process.

The application discloses a crystal form regulator and application thereof in phosphogypsum byproduct of wet-process phosphoric acid, and belongs to the technical field of phosphorus chemical industry.The crystal form regulator is composed of a compound capable of forming aluminum-fluorine complex anions and iron-fluorine complex anions under acidic conditions.The crystal form regulator provided by the application can remove 100% of calcium ions in acidolysis liquid, and can also obtain phosphogypsum with good crystal morphology, and solves the problem that calcium ions in acidolysis liquid after decomposition of phosphate rock by nitric acid or hydrochloric acid cannot be completely precipitated and crystallized from the acid liquid.

This invention discloses a wet process for treating ammonium bicarbonate in sodium bicarbonate mother liquor, comprising the following steps: 1) collecting sodium bicarbonate mother liquor; 2) transferring the sodium bicarbonate mother liquor to a primary ammonium sodium deposition vessel, adding sodium chloride to react and obtain a primary mixed slurry, then transferring the primary mixed slurry to a secondary ammonium sodium deposition vessel, continuing the reaction to obtain a secondary mixed slurry, then heating the secondary mixed slurry and transferring it to an ammonium sodium separation vessel to react and obtain a tertiary mixed slurry; 3) filtering the tertiary mixed slurry, sending the deammonium-removed mother liquor to prepare ammonium chloride, and returning the crude sodium bicarbonate to the metathesis reaction process to prepare sodium bicarbonate. This invention has low energy consumption and cost, and can effectively improve the nitrogen content and particle size of ammonium chloride. The ammonium chloride prepared from the ammonium chloride-containing filtrate after removing ammonium bicarbonate using this method meets the standards for superior agricultural ammonium chloride in terms of nitrogen content and particle size, greatly improving the product quality of agricultural ammonium chloride.