Production method of high-purity non-caking ammonium-free potassium bicarbonate

Abstract

The invention discloses a production method of high-purity non-caking ammonium-free potassium bicarbonate, which comprises the following steps: dissolving leftovers with the content of above 98% in a production process of industrial potassium carbonate or potassium carbonate into deionized purified water (or vapor condensation recycled water), or a cleaning solution obtain in Step 3), or potassium bicarbonate mother liquor obtained in Step 5); removing oil with an adsorbent, performing decoloration refining with a de-coloring agent and performing a carbonation reaction on refined potassium carbonate solution, so that potassium carbonate is translated into potassium bicarbonate; separating potassium bicarbonate out by crystallization and purifying potassium bicarbonate, so as to obtain a potassium bicarbonate wet product; and drying the potassium bicarbonate wet product with high-temperature airflow, so as to obtain a potassium bicarbonate finished product.

Description

technical field [0001] The invention belongs to the field of chemical industry, relates to the manufacturing technology of inorganic chemical potassium bicarbonate, particularly relates to a kind of non-caking ammonium-free high-purity (sodium content is less than 500ppm, ammonium content is less than 10ppm, total organic carbon content is less than 10ppm, Potassium bicarbonate content ≥ 99.5%) production method of potassium bicarbonate. Background technique [0002] Potassium carbonate and potassium bicarbonate are compounds with very clear and simple structures. They are not only an ancient and traditional chemical component, but also a compound that is constantly endowed with new functions, new features and new uses with the advancement and development of modern science and technology. A new product. Potassium bicarbonate, as a basic chemical raw material for inorganic salts, is the raw material for the production of potassium acetate, potassium fluoride, potassium arsen...

AI Technical Summary

Problems solved by technology

Although this technology solves the source problem of carbon dioxide, the carbon dioxide produced in its drying process contains a large amount of water vapor and ammonia, and the potassium bicarbonate ion exchange solution used in it contains a large amount of ammonium bicarbonate, so it cannot Produced high-purity potassium bicarbonate without ammonium, coupled with its unsolved anti-caking agent removal technology in potassium bicarbonate, the product clarity is also difficult to meet the requirements

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