Producing method of calcium hydrogen phosphate
A technology of calcium hydrogen phosphate and production methods, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of medium and acid-base cycle efficiency reduction, meet the requirements of simple raw materials, improve the efficiency of ammonia distillation, and improve the efficiency of hydrochloric acid The effect of cycle efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0031] 1) Put 1600mL of 25% hydrochloric acid into a 2000mL beaker, add 660g of phosphate rock powder under stirring, the fineness of phosphate rock powder is 80% and over 100 mesh, P 2 o 5 The CaO content is 27.8%, the CaO content is 39.0%, and the MgO content is 3.2%. After acidolysis at 45-50°C for two hours, filter and wash, the recovery rate of phosphorus in the acidolysis solution is 99.2%;
[0032]2) Add a compound defluorinating agent to the acid solution and neutralize it with ammonia water until the pH is 1.6-2.2, then separate and dry the precipitate to obtain a fertilizer calcium hydrogen phosphate product (which contains 3.2-3.6% nitrogen and 18.6-24.2% phosphorus, which can be used as compound fertilizer raw material);
[0033] 3) The above-mentioned filtrate is neutralized with ammonia water in the second stage until the pH is 4.2 to 4.8, and the feed grade calcium hydrogen phosphate product is obtained after separation, washing and drying (the yield in terms ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com