An improved filler, loading, base, compounding material, pigment or the like

摘要

A material suitable as a filler for size, and consisting of precipitated magnesium hydrate and calcium carbonate, is prepared by treating a mixture of magnesia and lime with an alkali carbonate in an aqueous medium. Calcined dolomite is slaked and treated with a solution of sodium carbonate in slight excess of the equivalent of the calcium hydrate present. After agitation and boiling the precipitate is filterpressed, washed, sieved and dried. Mixed with adhesives and other substances the material may be applied to card-stocks for the production of coated papers. The material may also be employed in the manufacture of textiles, &c.ALSO:A material that may be used in the production of lakes, and consisting of precipitated magnesium hydrate and calcium carbonate, is prepared by treating a mixture of magnesia and lime with an alkali carbonate in an aqueous medium. In an example calcined dolomite is slaked and treated with a solution of sodium carbonate in slight excess of the equivalent of the calcium hydrate present. After agitation and boiling the precipitate is filter-pressed, washed, sieved and dried.ALSO:A material, suitable for use in making soaps &c., consisting of precipitated magnesium hydrate and calcium carbonate is prepared by treating a mixture of magnesia and lime with an alkali carbonate in an aqueous medium. Calcined dolomite is slaked and treated with a solution of sodium carbonate in slight excess of the equivalent of the calcium hydrate present. After agitation and boiling the precipitate is filter-pressed, washed, sieved and dried.ALSO:A material consisting of precipitated magnesium hyrdate and calcium carbonate is prepared by treating a mixture of magnesia and lime with an alkali carbonate in an aqueous medium. Calcined dolomite is slaked and treated with a solution of sodium carbonate in slight excess of the equivalent of the calcium hydrate present. After agitation and boiling, the precipitate is filter-pressed, washed, sieved and dried.ALSO:A material suitable as a pigment, loading, filler, &c consisting of precipitated calcium carbonate associated with a variable amount of magnesium hydrate is prepared by treating a mixture of magnesia and lime with an alkali carbonate in an aqueous medium. Calcined dolomite is slaked and treated with a solution of sodium carbonate in slight excess of the equivalent of the calcium hydrate present. After agitation and boiling the precipitate is filter-pressed, washed, sieved and dried.