一种高效去除磷石膏中有害杂质的方法
By treating phosphogypsum with tert-amyl alcohol, acetic acid, and oxalic acid at room temperature, combined with ball milling and filtration processes, the problem of removing harmful impurities from phosphogypsum was solved, enabling the preparation of high-purity gypsum powder and expanding its application in the field of materials.
CN118343819BActive Publication Date: 2026-07-17ZHEJIANG UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2024-03-29
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies cannot efficiently remove harmful impurities from phosphogypsum, which limits its application in the materials field, especially in cement and gypsum building materials where it may cause abnormal setting and performance degradation.
Method used
Under normal temperature conditions, by ball milling with the addition of tert-amyl alcohol and acetic acid/2-ethyl-2,5-dimethylhexanoic acid, combined with oxalic acid solution filtration and spray granulation, the harmful impurities in phosphogypsum are efficiently removed, resulting in high-purity gypsum powder.
Benefits of technology
The process yields high-purity gypsum powder, with a purity of up to 99.99%, and is simple, energy-efficient, and suitable for large-scale industrial applications.
✦ Generated by Eureka AI based on patent content.
Abstract
本发明涉及固体废弃物再利用技术，旨在提供一种高效去除磷石膏中有害杂质的方法。该方法包括：在搅拌条件下，向磷石膏悬浮液中加入叔戊醇，得到混合液；将含有乙酸和2‑乙基‑2,5‑二甲基己酸的酸性液与混合液混合进行球磨处理，过筛得到粉状膏体；将其分散在乙二酸溶液中，获得膏体悬浮液；过筛后得到粉状膏体，经洗涤后分散于去离子水中，得到膏体悬浮液；以喷雾方式造粒，获得石膏粉体产品。本发明反应过程均在常温下进行，所用原材料和试剂无毒无害，制备过程绿色低能耗；石膏产品为高纯石膏，纯度可达99.99％，可作为高性能石膏原料使用，拓展了在材料领域的应用；制备过程简单、能耗低，有利于大规模产业化应用。
Need to check novelty before this filing date? Find Prior Art