Procedure to obtain calcium carbonate of high purity, to partition of any mineral that contains calcium. (Machine-translation by Google Translate, not legally binding)
ES2002600A6
Process for the production of high-purity magnesium oxide from minerals containing calcium and magnesium.
ES2002639A6
Procedure for desulfuration of carbon and or carbonous minerals (Machine-translation by Google Translate, not legally binding)
ES2000787A6
Artificio to distribute the fluidizing gas in fluidized beds (Machine-translation by Google Translate, not legally binding)
PT80699A
Process for the integral use of piritic minerals
ES8602546A1
Demetallising sludge from purifiers of urban and industrial water
ES8602554A1
Residual water purificn.
ES8605051A1
Tin prodn. by electrolysis of halide solns.
ES8600170A1
Purificn. of residual water - using biologically active beds of peat
ES8203164A1
Procedure for obtaining solar grade silicon
ES482360A1
Improvements in the absorbing plates of the planar solar collectors. (Machine-translation by Google Translate, not legally binding)
ES481353A1
Improvements in the plane solar collectors to which the vacuum applies to reduce the heat losses (Machine-translation by Google Translate, not legally binding)
ES479456A1
Improvements in solar equipment by passive circulation, thermosifon, between collectors and tank accumulator. (Machine-translation by Google Translate, not legally binding)
ES477019A1
Improvements introduced in a cylinder-parabolic concentrator for the capacity of solar energy. (Machine-translation by Google Translate, not legally binding)
ES476250A1
Improvements introduced in the solar energy sensing systems. (Machine-translation by Google Translate, not legally binding)
ES467460A2
Procedure for the recovery of non-ferrous metals of the iron pyrites and related minerals. (Machine-translation by Google Translate, not legally binding)
ES456344A1
Ion exchange removal of iron etc. from aluminium sulphate solns. - produced by lixiviation of thermally sulphated and other clays
ES454763A1
Procedure to obtain aluminum from impurious bleaches of aluminum sulfate. (Machine-translation by Google Translate, not legally binding)
ES444187A1
Process for obtaining alumina from clay and other silico-aluminous raw material
