The story of Pittsburgh: Radium

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Multivolume work

Identifikator:: 1831622599

Document type:: Multivolume work

Title:: The story of Pittsburgh

Place of publication:: Pittsburgh

Publisher:: First National Bank

Year of publication:: 1919-1930

Collection:: Economics Books

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Volume

Identifikator:: 1831623226

URN:: urn:nbn:de:zbw-retromon-239786

Document type:: Volume

Title:: Radium

Volume count:: Vol. 1, nr. 7

Place of publication:: Pittsburgh

Publisher:: First National Bank

Year of publication:: 1921

Scope:: [ca. 18] Seiten

Digitisation:: 2022

Collection:: Economics Books

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Document type:: Multivolume work

Structure type:: Chapter

Title:: Radium

Collection:: Economics Books

At the Canonsburg plant, two hundred men are neces- sary to carry through all the detailed work. When this ore is taken up by the Colorado mill, there is only one part Radium for every four hundred million parts of the ore. As this ore reaches the mill at Canonsburg, there is one aundred million parts of the ore for every one part of Radium. The task of the Canonsburg men is to reduce this mass of ore to less than a quarter of a ton and to have the Radium that may be in the greater mass, in the small residue. This is done with regularity and precision, notwith- standing that, to eliminate this one hundred million parts of undesirable material, this Canonsburg plant has to use ten thousand tons of distilled water, a thousand tons of coal and five hundred tons of chemicals. What small quantity of Vanadium aid Uranium there may be in this material, is saved while this reduction is being made. The actual recovery of whatever Radium there may be in the tons of material handled at these two great’ con- centration plants, is made elsewhere. When the material that reached Canonsburg from the mill in the West has been reduced to less than a quarter of a ton, this residue is sent to the Radium Research Laboratories of the Com- pany in the City of Pittsburgh. As it reaches this Laboratory, this material is in the form of radium barium chloride. By successive fractional erystallizations of the radium chloride, and at a later stage, of the bromide, most of the Radium is obtained in a salt containing over 95 per cent of pure Radium bromide. By further chemical treatment, the bromide is converted into the sulphate or the chloride, and in the therapeutic ase of Radium, these two salts find the largest use. The first Radium produced in the United States was obtained in these Radium Research Laboratories of the

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