Preparation of high quality Microgranulate CrO3 based on green process design
Cui, Wenwen1,2,3; Li, Ping1,2; Chen, Yongan1,2; Liu, Chuang1,2; Zhang, Hailin1,2,3; Wang, Shulei1,2,3; Wang, Hongyan1,2; Zheng, Shili1,2; Zhang, Yi1,2
2017-07-01
发表期刊CANADIAN JOURNAL OF CHEMICAL ENGINEERING
ISSN0008-4034
卷号95期号:7页码:1261-1268
摘要A mild crystallization process was proposed to prepare chromium trioxide (CrO3) by reaction between K2Cr2O7 and HNO3 aqueous solutions. Through ICP, XRPD, SEM, and EDS analysis, key factors and mechanisms that influenced the preparation of CrO3 were studied. Large spherical particles of CrO3 (d(50)300 mu m) with high purity (CrO(3)0.99g/g, K2mg/g) were prepared when the initial concentration of K2Cr2O7 was kept at 80g/100mL HNO3, the acid feeding rate and the cooling rate were set at 1 mLmin-1 and 0.1 degrees Cmin-1, respectively, and the direct recovery of Cr6+ was up to more than 95%. Kinetic analysis indicated that low nucleation rate and high growth rate would favour the increase of CrO3 particle size in this process. As a high-valued byproduct, Cr(VI)-free KNO3 was further prepared with the designed crystallization steps. Additionally, green characteristics of the process were also discussed.
关键词Chromium Trioxide (Cro3) Particle Size Purity Kinetic Green Process
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1002/cjce.22764
收录类别SCI
语种英语
关键词[WOS]CRYSTALLIZATION KINETICS ; NUCLEATION ; SIZE ; AMPICILLIN ; GROWTH ; ACID
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(51574212 ; Major State Basic Research Development Program of China (973 program)(2013CB632605) ; U1403195)
WOS记录号WOS:000402608500006
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22620
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
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Cui, Wenwen,Li, Ping,Chen, Yongan,et al. Preparation of high quality Microgranulate CrO3 based on green process design[J]. CANADIAN JOURNAL OF CHEMICAL ENGINEERING,2017,95(7):1261-1268.
APA Cui, Wenwen.,Li, Ping.,Chen, Yongan.,Liu, Chuang.,Zhang, Hailin.,...&Zhang, Yi.(2017).Preparation of high quality Microgranulate CrO3 based on green process design.CANADIAN JOURNAL OF CHEMICAL ENGINEERING,95(7),1261-1268.
MLA Cui, Wenwen,et al."Preparation of high quality Microgranulate CrO3 based on green process design".CANADIAN JOURNAL OF CHEMICAL ENGINEERING 95.7(2017):1261-1268.
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