Novel preparation of hydrated mixed silicates

Claim 2

A PROCESS FOR THE PREPARATION OF A HYDROUS MIXED SILICATE COMPRISING ADMIXING ALKALI METAL SILICATES IN THE FORM OF CHUNKS OR BROKEN PIECES, WATER AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALKALI SOLUTION OXIDIC AND SILICEOUS MATERIALS IN FIBROUS OR PULVERULENT FORM AND MIXTURES THEREOF AND OPTIONALLY PRESENT WATERSOLUBLE ORGANIC COMPOUNDS IN A MILLING APPARATUS WITH STEAM AT A VAPOR PRESSURE OF 2 TO 6 ATOMOSPHERES WITH STATU NASCENDI FORMATION OF A WATER GLASS SOLUTION AND SIMULTANEOUS DISSOLUTION OF OXIDIC AND/OR SILICEOUS MATERIALS AND DRYING THE RESULTING SOLUTION TO FORM A MIXED SILICATE POWDER HAVING A MOISTURE CONTENT OF 1 TO 25 PERCENT AND HAVING A SILICATE TO SOLID RATIO OF 1:0.02-08.

Claim 3

The process of claim 1 wherein the steam pressure is 3 to 5 atmospheres.

Claim 4

The process of claim 1 wherein the alkali metal silicate has an Na2O:SiO2 ratio greater than 1:3.2.

Claim 5

The process of claim 1 wherein the oxidic material is selected from the group consisting of zinc oxide, borax, aluminum oxide hydrate and lead oxide.

Claim 6

The process of claim 1 wherein the water-soluble, organic compound is selected from the group consisting of glycerin, glycol, sugar and molasses.

Claim 7

The process of claim 1 wherein the siliceous material is selected from the group consisting of stone wool, basalt wool, glass wool, slag wool, powdered slag, powdered glass and powdered rock.

Claim 8

A process for the preparation of a hydrous mixed silicate comprising admixing alkali metal silicates in the form of chunks or broken pieces, water and at least one member of the group consisting of alkali soluble oxidic and siliceous materials in fibrous or pulverulent form and mixtures thereof and optionally present water-soluble organic compounds in a milling apparatus with steam at a vapor pressure of 2 to 6 atmospheres with statu nascendi formation of a water glass solution and simultaneous dissolution of said oxidic and siliceous materials and drying the resulting solution to form a mixed silicate powder having a moisture content of 1 to 25 percent and having a silicate to solid ratio of 1:0.2-0.8, said siliceous material being selected from the group consisting of stone wool, basalt wool, glass wool, slag wool, powdered slag, powdered glass and powdered rock and said oxidic material being selected from the group consisting of zinc oxide, borax, aluminum oxide hydrate and lead oxide.

Claim 9

A process for the preparation of a hydrous mixed silicate comprising admixing alkali metal silicates in the form of chunks or broken pieces, water and at least one member of the group consisting of alkali soluble oxidic and siliceous materials in fibrous or pulverulent form and mixtures thereof and optionally present water-soluble organic compounds in a milling apparatus with steam at a vapor pressure of 2 to 6 atmospheres with statu nascendi formation of a water glass solution and simultaneous dissolution of said oxidic and siliceous materials and drying the resulting solution to form a mixed silicate powder having a moisture content of 1 to 25 percent and having a silicate to solid ratio of 1:0.2-0.8, said siliceous material being selected from the group consisting of stone wool, basalt wool, glass wool, slag wool, powdered slag, powdered glass and powdered rock and said oxidic material being selected from the group consisting of zinc oxide, borax, aluminum oxide hydrate and lead oxide.