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1. 发明专利

NZ520508A Rheology modified compositions and modification agents for use in water-based fluids 未知
公开(公告)号：NZ520508A
公开(公告)日：2004-12-24
申请号：NZ52050801
申请日：2001-01-05
申请人： EDGAR FRANKLIN HOY
发明人： HOY EDGAR FRANKLIN
IPC分类号： B01J13/00 , C09K8/16 , C01B33/20 , C04B33/04
摘要： A method of making a rheology modified aqueous composition, particularly useful for drilling, milling and mining applications, is disclosed, wherein the method includes admixing, with a clay and water, a material whose constituents substantially conform to the proportions of the empirical formula M'mM''n(OH)(2m+3n+qa+br)(Aq)a(Br)b.xH2O, where M' represents at least one divalent metal cation selected from the group consisting of Mg, Ca, Mn, Fe, Co, Ni, Cu and Zn and m is an amount of from greater than zero to about 8; where M'' represents at least one trivalent metal cation selected from the group consisting of Al, Ga and Fe and n is an amount of from greater than zero to about 6; where A is an anion or negative-valence radical that is monovalent or polyvalent, and a is an amount of A ions of valence q, provided that if A is monovalent, a is from greater than zero to about 8, and if A is polyvalent, a is from greater than zero to about 4; where B is a second anion or negative-valence radical that is monovalent or polyvalent, and where b is an amount of B ions of valence r and b is from zero to about 4; provided (m+n) is greater than or equal to 1; further provided that qa+br cannot be greater than 2m+3n and provided that qa cannot equal 2m+3n; and still further provided that (2m+3n+qa+br) is less than 3; and where xH2O represents excess waters of hydration, with x being zero or more; and where the material is a calcined hydrotalcite and hydrotalcite-like compound, or mixture thereof, wherein the calcinations is carried out in the presence of greater than 1000 ppm of sodium. Optionally, an aluminum oxide, a nitrogen-containing compound, or both may be added. The resulting composition is preferably an elastic solid exhibiting stress-dependent fluidity, desirable temperature resistance, inhibition of reactivity, relatively low cost, and pressure resistance. A dry rheology modification agent composition and a method of making the same is also disclosed.

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