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Phase diagram analysis of the carbonation process of sodium chromate and ammonia solution
Alternative TitleActa Phys.-Chim. Sin.
Liu, CJ; Zhang, Y
2004-11-01
Source PublicationACTA PHYSICO-CHIMICA SINICA
ISSN1000-6818
Volume20Issue:11Pages:1335-1338
AbstractThe solubility and phase diagram of Na+, NH4+ / / CrO42-, HCO3--H2O system are determined in this paper. According to the solubility and phase diagram, the solid phases in carbonation process of sodium chromate in ammonia solution are discussed. The results show that a crystalline zone of NaNH4CrO4 (.) 2H(2)O exists, NaHCO3, NaNH4CrO4 (.) 2H(2)O and (NH4)(2)CrO4 crystallize out in turn during carbonation process as the concentration of sodium chromate in ammonia water exceeds the concentration corresponding to P-2(P-2') in phase diagram. Proper concentration is 0.8633 similar to 1.1377 g/g H2O for sodium chromate, 0.0611 similar to 0.0986 g/g H2O for ammonia, lower than the concentration corresponding to P-2(P-2') plot. The NaHCO3 and NaNH4CrO4 (.) 2H(2)O crystals can be separated by hydrocyclone.; The solubility and phase diagram of Na+, NH4+ / / CrO42-, HCO3--H2O system are determined in this paper. According to the solubility and phase diagram, the solid phases in carbonation process of sodium chromate in ammonia solution are discussed. The results show that a crystalline zone of NaNH4CrO4 (.) 2H(2)O exists, NaHCO3, NaNH4CrO4 (.) 2H(2)O and (NH4)(2)CrO4 crystallize out in turn during carbonation process as the concentration of sodium chromate in ammonia water exceeds the concentration corresponding to P-2(P-2') in phase diagram. Proper concentration is 0.8633 similar to 1.1377 g/g H2O for sodium chromate, 0.0611 similar to 0.0986 g/g H2O for ammonia, lower than the concentration corresponding to P-2(P-2') plot. The NaHCO3 and NaNH4CrO4 (.) 2H(2)O crystals can be separated by hydrocyclone.
KeywordChromates Clean Process Solubility Phase Diagram
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3866/PKU.WHXB20041110
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000225381400010
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4984
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
2.Univ Petr, China Natl Petr Corp, Key Lab Catalysis, Beijing 102249, Peoples R China
Recommended Citation
GB/T 7714
Liu, CJ,Zhang, Y. Phase diagram analysis of the carbonation process of sodium chromate and ammonia solution[J]. ACTA PHYSICO-CHIMICA SINICA,2004,20(11):1335-1338.
APA Liu, CJ,&Zhang, Y.(2004).Phase diagram analysis of the carbonation process of sodium chromate and ammonia solution.ACTA PHYSICO-CHIMICA SINICA,20(11),1335-1338.
MLA Liu, CJ,et al."Phase diagram analysis of the carbonation process of sodium chromate and ammonia solution".ACTA PHYSICO-CHIMICA SINICA 20.11(2004):1335-1338.
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