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The reaction of MgCl2 center dot 4H(2)O with CCl2F2
Long, GM; Ma, PH
AbstractA new reaction Of MgCl2.4H(2)O with CCl2F2 is investigated by DTA and TG from room temperature to 350degreesC. It is observed that MgF2 was obtained between 252 and 350degreesC, Below the temperature, MgCl2.4H(2)O dehydrates and hydrolyzes to MgCl2 and Mg(OH)Cl, which are the real reactants of the reaction with CCl2F2. The formation of MgF2 is ascribed to the reaction of MgCl2 and Mg(OH)Cl with HF, which forms by decomposition Of CCl2F2 with the taking part in of H2O released from dehydration of hydrated magnesium chloride on the surface Of MgCl2 and Mg(OH)Cl, which catalyzes the decomposition Of CCl2F2 in this case. Consequently, the reactions are tested in the fluid-bed condition. It is found that MgF2 formed at temperatures down to 200degreesC in a fluid-bed reactor. This reaction may be used as a method of disposing of the environmentally sensitive CCl2F2 (rather than release into the atmosphere). It is also a method for the preparation of MgF2. (C) 2003 Published by Elsevier Science B.V.
KeywordMgf2 Mgcl2 Center Dot 4h(2)o Ccl2f2 Catalytic Decomposition Thermal Analysis Fluid-bed
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaChemistry
WOS SubjectChemistry, Analytical ; Chemistry, Physical
WOS IDWOS:000184536200010
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Document Type期刊论文
AffiliationChinese Acad Sci, Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Long, GM,Ma, PH. The reaction of MgCl2 center dot 4H(2)O with CCl2F2[J]. THERMOCHIMICA ACTA,2003,403(2):231-235.
APA Long, GM,&Ma, PH.(2003).The reaction of MgCl2 center dot 4H(2)O with CCl2F2.THERMOCHIMICA ACTA,403(2),231-235.
MLA Long, GM,et al."The reaction of MgCl2 center dot 4H(2)O with CCl2F2".THERMOCHIMICA ACTA 403.2(2003):231-235.
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