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Dehydrating Magnesium Chloride by Double-Salt Decomposition.

PB279653

Publication Date	1978
Personal Author	May, J. T.; Edlund, V. E.; Seidel, D. C.
Page Count	27
Abstract	Federal Bureau of Mines studies show that some organic hydrochlorides can be used as dehydrating agents for producing anhydrous MgCl2 from hydrates and brines. Double salts are formed, and these salts dissociate without decomposition of the magnesium chloride. Laboratory-scale dehydration tests were made with 35-percent magnesium chloride brine and with spray-dried magnesium chloride. These feed materials were mixed with aniline or pyridine hydrochloride in an amount in excess of that required to form the hydrated equimolar double salt. The mixture was heated to evaporated free water and then to release water of hydration leaving an anhydrous double salt. The double salt was decomposed to anhydrous magnesium chloride and volatile organic amine hydrochloride which was collected for recycle. The organic amine hydrochloride chlorinated magnesium oxides that were present in present spray-dried magnesium chloride, freeing the amine which was collected and converted to the amine hydrochloride by addition of hydrochloric acid. This chlorination reaction occurred at 375C. The anhydrous magnesium chloride products obtained by this process contained less than 0.8 percent oxygen.
Keywords	Magnesium chloride Dehydration Sea water Salts Dissociation Decomposition Laboratory equipment Extractive metallurgy Brines
Source Agency	Bureau of Mines
NTIS Subject Category	71J - Iron & Iron Alloys 99 - Chemistry
Corporate Authors	Bureau of Mines, Salt Lake City, Utah. Salt Lake City Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations 1978.
NTIS Issue Number	197815

Dehydrating Magnesium Chloride by Double-Salt Decomposition.

Dehydrating Magnesium Chloride by Double-Salt Decomposition.
PB279653

Publication Date	1978
Personal Author	May, J. T.; Edlund, V. E.; Seidel, D. C.
Page Count	27
Abstract	Federal Bureau of Mines studies show that some organic hydrochlorides can be used as dehydrating agents for producing anhydrous MgCl2 from hydrates and brines. Double salts are formed, and these salts dissociate without decomposition of the magnesium chloride. Laboratory-scale dehydration tests were made with 35-percent magnesium chloride brine and with spray-dried magnesium chloride. These feed materials were mixed with aniline or pyridine hydrochloride in an amount in excess of that required to form the hydrated equimolar double salt. The mixture was heated to evaporated free water and then to release water of hydration leaving an anhydrous double salt. The double salt was decomposed to anhydrous magnesium chloride and volatile organic amine hydrochloride which was collected for recycle. The organic amine hydrochloride chlorinated magnesium oxides that were present in present spray-dried magnesium chloride, freeing the amine which was collected and converted to the amine hydrochloride by addition of hydrochloric acid. This chlorination reaction occurred at 375C. The anhydrous magnesium chloride products obtained by this process contained less than 0.8 percent oxygen.
Keywords	Magnesium chloride Dehydration Sea water Salts Dissociation Decomposition Laboratory equipment Extractive metallurgy Brines
Source Agency	Bureau of Mines
NTIS Subject Category	71J - Iron & Iron Alloys 99 - Chemistry
Corporate Authors	Bureau of Mines, Salt Lake City, Utah. Salt Lake City Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations 1978.
NTIS Issue Number	197815