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Hexavalent chromium reducing agent based on tinplate recovery waste liquid and preparation method of hexavalent chromium reducing agent
The invention discloses a hexavalent chromium reducing agent based on tinplate recovery waste liquid and a preparation method of the hexavalent chromium reducing agent, and belongs to the technical field of building materials. The hexavalent chromium reducing agent is prepared from the following components in parts by weight: 1 to 10 parts of stannous acid salt, 4 to 10 parts of sodium hydroxide, 1 to 5 parts of carbonate, 1 to 3 parts of triisopropanolamine and 70 to 90 parts of solvent. The preparation method comprises the following steps: immersing the tinplate waste into a mixed solution of triisopropanolamine and a solvent to obtain a mixed solution; carbonate is added into the mixed solution, stirring and heating are carried out, sodium hydroxide is added, full stirring reaction and filtering are carried out, the liquid hexavalent chromium reducing agent is obtained, and the tin content of the liquid hexavalent chromium reducing agent is 5-18 g/L. The hexavalent chromium reducing agent has good stability under the synergistic effect of carbonate and triisopropanolamine, and tin in tinplate can be converted into stannous acid salt to the maximum extent; according to the invention, the waste tinplate is reused, so that the waste of resources is avoided; the hexavalent chromium reducing agent is liquid and convenient to use, when the steel tailings are treated, obtained chromium hydroxide is high in stability, and trivalent chromium is not prone to being oxidized into hexavalent chromium.
本发明公开了一种基于马口铁回收废液的六价铬还原剂及其制备方法，属于建筑材料技术领域。所述六价铬还原剂，各组分的重量份数如下：亚锡酸盐1‑10份，氢氧化钠4‑10份，碳酸盐1‑5份，三异丙醇胺1‑3份和溶剂70‑90份。制备方法为将马口铁废料浸入三异丙醇胺与溶剂的混合溶液中，得到混合溶液；向上述混合溶液中加入碳酸盐，搅拌，加热，加入氢氧化钠，充分搅拌反应，过滤，得到液态六价铬还原剂，液态六价铬还原剂中含锡量为5‑18g/L。本发明的六价铬还原剂在碳酸盐和三异丙醇胺的协同作用下，具有很好的稳定性，且马口铁中的锡可以最大化的转化为亚锡酸盐；本发明对废弃的马口铁进行了重新利用，避免了资源的浪费；本发明的六价铬还原剂为液体，使用方便，在处理钢尾渣时，得到的氢氧化铬稳定性高，三价铬不易再被氧化为六价铬。
Hexavalent chromium reducing agent based on tinplate recovery waste liquid and preparation method of hexavalent chromium reducing agent
The invention discloses a hexavalent chromium reducing agent based on tinplate recovery waste liquid and a preparation method of the hexavalent chromium reducing agent, and belongs to the technical field of building materials. The hexavalent chromium reducing agent is prepared from the following components in parts by weight: 1 to 10 parts of stannous acid salt, 4 to 10 parts of sodium hydroxide, 1 to 5 parts of carbonate, 1 to 3 parts of triisopropanolamine and 70 to 90 parts of solvent. The preparation method comprises the following steps: immersing the tinplate waste into a mixed solution of triisopropanolamine and a solvent to obtain a mixed solution; carbonate is added into the mixed solution, stirring and heating are carried out, sodium hydroxide is added, full stirring reaction and filtering are carried out, the liquid hexavalent chromium reducing agent is obtained, and the tin content of the liquid hexavalent chromium reducing agent is 5-18 g/L. The hexavalent chromium reducing agent has good stability under the synergistic effect of carbonate and triisopropanolamine, and tin in tinplate can be converted into stannous acid salt to the maximum extent; according to the invention, the waste tinplate is reused, so that the waste of resources is avoided; the hexavalent chromium reducing agent is liquid and convenient to use, when the steel tailings are treated, obtained chromium hydroxide is high in stability, and trivalent chromium is not prone to being oxidized into hexavalent chromium.
本发明公开了一种基于马口铁回收废液的六价铬还原剂及其制备方法，属于建筑材料技术领域。所述六价铬还原剂，各组分的重量份数如下：亚锡酸盐1‑10份，氢氧化钠4‑10份，碳酸盐1‑5份，三异丙醇胺1‑3份和溶剂70‑90份。制备方法为将马口铁废料浸入三异丙醇胺与溶剂的混合溶液中，得到混合溶液；向上述混合溶液中加入碳酸盐，搅拌，加热，加入氢氧化钠，充分搅拌反应，过滤，得到液态六价铬还原剂，液态六价铬还原剂中含锡量为5‑18g/L。本发明的六价铬还原剂在碳酸盐和三异丙醇胺的协同作用下，具有很好的稳定性，且马口铁中的锡可以最大化的转化为亚锡酸盐；本发明对废弃的马口铁进行了重新利用，避免了资源的浪费；本发明的六价铬还原剂为液体，使用方便，在处理钢尾渣时，得到的氢氧化铬稳定性高，三价铬不易再被氧化为六价铬。
Hexavalent chromium reducing agent based on tinplate recovery waste liquid and preparation method of hexavalent chromium reducing agent
一种基于马口铁回收废液的六价铬还原剂及其制备方法
ZHANG LIHUA (author) / SHAO YANLING (author) / FANG YANFENG (author) / DING XIANGQUN (author) / TONG YU (author)
2024-03-22
Patent
Electronic Resource
Chinese
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