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Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)

Pressler, J. W.
Calcium and calcium compounds,   pp. 147-151 ff. PDF (570.2 KB)


Page 147

  147Calcium and Calcium 
Compounds 
By J. W. Pressler1 
 Calcium metal was manufactured by one company in Connecticut. Calcium chloride
was produced by two companies in California and two companies in Michigan.
Syn 
thetic calcium chloride was manufactured by one company in New York and two
companies in Washington. 
DOMESTIC PRODUCTION 
 Pfizer Inc. produced calcium metal at Canaan, Conn., by an aluminothermic
process in which high-purity quicklime and aluminum powder are briquetted
and heated in vacuum retorts. At 1,170~ C, calcium vaporizes and is collected
at the other end of the retort, which has a water-cooled condenser. 
 National Chloride Co. of America and Leslie Salt Co. produced calcium chloride
from wells in San Bernardino County, Calif. Average output increased 20%
in 1978, but decreased 13% in 1979, compared with that of the previous year.
The Dow Chemical Co., Velsicol Chemical Corp., and Wilkinson Chemical Corp.
recovered calcium chloride from brine in Gratiot, Lapeer, Mason, and Midland
Counties, Mich.; however, Velsi 
- col's plant was shut down in 1978. Average output in Michigan increased
9% in 1978, but decreased 5% in 1979, compared with 
that of the previous year. Total production of natural calcium chloride in
1978 was 773,000 tons, an increase of 9% compared with 1977 production; total
production in 1979 was 719,700 tons, a decrease of 7% compared with that
of 1978. 
 Allied Chemical Corp. recovered synthetic calcium chloride as a byproduct
of soda ash at Syracuse, N.Y.; Reichold Chemicals, Inc., recovered synthetic
calcium chloride as a byproduct of pentachlorophenol manufacture at Tacoma,
Wash.; and Hooker Chemicals & Plastics Corp. manufactured calcium
chloride
at Tacoma using limestone and hydrochloric acid. Total output of synthetic
calcium chloride in 1978 was 258,000 tons, a slight increase compared with
the 1977 level; in 1979, output was 251,000 tons, a decrease of 3% compared
with the 1978 level. 
Table 1.—Production of calcium chloride (75% CaCl2 equivalent)
in the
United States 
Natural 
Synthetic 
Total 
Quantity Value 
(short tons) (thousands) 
Quantity (short tons) 
 Value (thousands) 
Quantity (short tons) 
Value 
(thousands) 
1975           
1976           
1977           
1978           
1979            
 594,400 $29,047 648,979 32,889 710,385 45,048 773,138 53,868 719,709 51,884
233,869 
248,272 
257,231 
257,763 
261,052 
$15,137 
14,381 
17,683 
21,172 
22,566 
828,269 
897,251 
967,616 
1,030,901 
980,761 
' $44,183 
 47,270 
 62,731 
 75,040 
 74,450 
' Data do not add to 
total shown because of mdependen 
trounding. 


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