New Jersey Zinc

The New Jersey Zinc Company patented a fluidized-peUet roaster which was instaUed in several zinc plants. CaUed a fluid-column roaster, it resembles a shaft furnace and can handle 370 t of concentrate per day. This roaster can be operated at 1080—1100°C to eliminate 90% of the cadmium and 92% of the lead. The fluid-column roaster has the same advantages as the MHO roaster the pelletizing cost is a disadvantage for both systems. 

Grades purer than the Prime Western product have been made by vacuum de2incing the Hquid alloy to recover 99.9% 2inc at 0.02% lead. Distillation (New Jersey Zinc process) produces a purer product at a considerable cost in energy. 

The most commonly used chromate passivation process is the Cronak process developed by the New Jersey Zinc Co. in 1936, in which the parts are immersed for 5-10 s in a solution containing 182 g/1 sodium dichromate and 6ml/l sulphuric acid. A golden irridescent film is formed on the zinc or cadmium surface. Many variants (all fairly acidic) have been developed subsequently all are based on dichromate (or chromic acid) with one or more of the following sulphuric acid, hydrochloric acid (or sodium chloride), nitric acid (or nitrate), phosphoric acid, formic acid and acetic acid. A survey by Biestek shows that several of these variants are as good as the Cronak process, although none is superior. 

EPA. 1996b. Bioavailability of lead in soil samples from the New Jersey Zinc NPL Site Pahnerton, Pennsylvania. U.S. Environmental Protection Agency Region 8. Document Control No. 04800-030-0162. 

New Jersey A continuous process for extracting zinc from zinc oxide, made by roasting zinc sulfide ore, by reduction with carbon in a vertical retort. First operated by the New Jersey Zinc Company in Palmerton, PA, in 1929, and introduced into the Avonmouth, UK, works of the Imperial Smelting Company in 1934. 

Schroder-Grillo Also known as Grillo-Schroder. An early version of the contact process for making sulfuric acid. The catalyst was magnesium sulfate impregnated with platinum. The process was invented in 1899 by A. Hecksher at the New Jersey Zinc Company and first used at its plant in Mineral Point, WI, in 1901 this was the first use of the contact process in the United States. In the United Kingdom it was first used in Widnes in 1917. See also Mannheim (2). 

New Jersey Toxic Catastrophe Prevention Act (NJTCPA), 27 830 New Jersey Zinc Company, 26 564-565 New product development programs, 75 638... 

Around 1850, S. Wetherill of the New Jersey Zinc Company perfected a roasting furnace in which a grate was charged with coal and then covered with a mixture of zinc ore and coal. The zinc was reduced by the partial combustion of the coal and reoxidized at the furnace exit (direct or American process). These furnaces were subsequently improved but are now no longer used. During the second half of the 19th century, the use of ZnO in rubber was introduced to reduce the time needed for vulcanization. The discovery of the first organic accelerators for vulcanization in 1906 added to the importance of ZnO, which acts as an activator in these materials. 

Fractional Distillation. The vapor, containing Cd, Pb, Fe, Al, and Cu, can be purified by fractional distillation in columns (New Jersey Zinc Co.) with silicon carbide plates. Oxidation takes place at the exit of the column. 

H. Brown Zinc Oxide Rediscovered, New Jersey Zinc Co., New York 1957. 

E. A. Anderson and G. L. Wedey, Zamak Alloysfor Zinc Die Casting 12th ed.. The New Jersey Zinc Company, Paknerton, Pa., 1965. 

Superplastic Meta Manual, The New Jersey Zinc Company, Palmerton, Pa., 1970. 

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