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)
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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