摘要
开发了基于高铁酸钾碱性反应体系的裂解炭黑(CBP)高效的除杂改性技术,该体系对裂解炭黑具有去灰分、提升表面活性的双重效果;利用次氯酸钠与高铁酸钾的氧化还原反应,同步建立废液中高铁酸根离子再生和循环利用的回收途径。系统考察了该体系中高铁酸钾和氢氧化钠配比对裂解炭黑改性效果的影响。实验确定了K2FeO4与NaOH的最佳配比(质量比)为1∶1,在此配比下,裂解炭黑灰分含量从17.37%降至0.95%,水分散液的Zeta电位从-14 mV减小到-25 mV,改性后的裂解炭黑能够在水中稳定分散,这为裂解炭黑在天然胶乳中的应用提供了条件。最后探索了反应液循环回收利用的可行性,研究表明,反应液经过7次循环利用后,改性裂解炭黑的效果与首次构建的高铁酸钾碱性反应体系改性效果大致相同。
This work developed a high effective demineralization and modification technology for pyrolysis carbon black(CBP).This reaction system was based on a novel alkaline reac-tion system of potassium ferrate,which has the dual effects of removing inorganic ash and improving surface activity of CBP.And simultaneously,according to the redox reaction be-tween sodium hypochlorite and potassium ferrate,the recycling method for the regeneration and recycling of ferrate ions in the waste liquid was developed.Based on the experiment re-sults,it's found that the optimal reagent ratio between K2FeO4 and NaOH is 1:1.At this ratio,the ash content of pyrolysis carbon black is reduced from 17.37%to 0.95%,and the Zeta potential of CBP aqueous dispersion is reduced from-14 mV to-25 mV.The modified CBP can disperse stably in water,which provides a condition for the application of modi-fied CBP in natural rubber latex.Finally,the feasibility of recycling the waste liquid was ex-plored.The study showed that after the waste liquid was recycled for 7 times,the waste liq-uid has roughly same modification effect on CBP as the original potassium ferrate alkaline re-action system.
作者
孔政清
刘克
段咏欣
KONG Zhengqing;LIU Ke;DUAN Yongxin(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)
出处
《青岛科技大学学报（自然科学版）》
CAS
2023年第2期82-88,共7页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家重点基础研究发展计划项目(2018YFC1902604)。
关键词
废轮胎
裂解炭黑
高铁酸钾
氧化
去灰分
废液循环利用
waste tires
pyrolysis carbon black
potassium ferrate
oxidation
demineraliza-tion
waste liquid recycling
作者简介
孔政清(1994-),男,硕士研究生;通信联系人:段咏欣.
