摘要
研究了用水合肼回收电沉积铬废液中铬的工艺条件。实验结果表明,在30℃下于25mL含铬废液中加入1.6mLH2SO4和0.8mL水合肼,8min即可使Cr(Ⅵ)还原为Cr(Ⅲ)。然后用浓氨水使Cr(Ⅲ)完全沉淀,再与H2SO4充分反应,得到Cr2(SO4)3,从而实现铬废液中铬的回收。
The process conditions of reclaiming chromium from electrodeposition chromium waste liquid using hydrazine hydrate as reducing agent were studied. The experimental result showed that Cr( Ⅵ ) was deoxidized to Cr (Ⅲ) at 30 ℃in 8 min, adding 1.6 mL H2SO4 and 0.8 mL hydrazine hydrate to 25 mL chromium- containing waste liquid. Cr(Ⅲ ) was deposited using concentrated ammonia water, and then was reacted with H2SO4. Cr2 (SO4)3 was obtained and thereby chromium in the chromium waste liquid was reclaimed successfully.
出处
《精细石油化工进展》
CAS
2006年第4期25-26,30,共3页
Advances in Fine Petrochemicals
基金
桂林工学院学生科技立项项目.
关键词
水合肼
铬废液
铬
回收
hydrazine hydrate, chromium waste liquid, chromium, reclaim