Chemical News and Journal of Industrial Science, Tomy 99-100Chemical news office., 1909 |
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Strona 1
... extraction of these bodies from the minerals in which they are found . These methods classified are : - 1. Fusion with alkaline hydroxides : Ekeberg ( Rose and others ) . 2. Fusion with potassium carbonate and borax ( Wol . laston ) . 3 ...
... extraction of these bodies from the minerals in which they are found . These methods classified are : - 1. Fusion with alkaline hydroxides : Ekeberg ( Rose and others ) . 2. Fusion with potassium carbonate and borax ( Wol . laston ) . 3 ...
Strona 3
... extracting the melt with hot dilute sulphuric acid always contain basic matters , and especially iron and zirconia ... extract the tin , tungsten , iron , & c . , that a certain amount of niobic and , perhaps , tantalic acid will be ...
... extracting the melt with hot dilute sulphuric acid always contain basic matters , and especially iron and zirconia ... extract the tin , tungsten , iron , & c . , that a certain amount of niobic and , perhaps , tantalic acid will be ...
Strona 4
... extracting these bodies from their native compounds , and especially from ordinary columbites and tantalites , so that as far as possible the use of fluorine compounds and the employment of platinum vessels should be avoided , and also ...
... extracting these bodies from their native compounds , and especially from ordinary columbites and tantalites , so that as far as possible the use of fluorine compounds and the employment of platinum vessels should be avoided , and also ...
Strona 7
... extraction of the alkalis 10 grms . of dry soil are placed in an Erlenmeyer flask with 25 cc . to 35 cc . of about 20 per cent hydrochloric acid . The flask is thoroughly shaken and a small funnel is hung in its neck to avoid too great ...
... extraction of the alkalis 10 grms . of dry soil are placed in an Erlenmeyer flask with 25 cc . to 35 cc . of about 20 per cent hydrochloric acid . The flask is thoroughly shaken and a small funnel is hung in its neck to avoid too great ...
Strona 8
... extract , the following general procedure was found to be most expeditious . The soil extract was filtered through paper into an evaporating dish and the residue was washed with boiling water until the filtrate gave no reaction for ...
... extract , the following general procedure was found to be most expeditious . The soil extract was filtered through paper into an evaporating dish and the residue was washed with boiling water until the filtrate gave no reaction for ...
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