Compositions – Leather or fur treating
Patent
1992-05-11
1993-06-08
Geist, Gary L.
Compositions
Leather or fur treating
2523153, E21B 4326
Patent
active
052176320
ABSTRACT:
The present invention relates to a new process for preparing boron zirconium chelate solutions which are stable on the addition of acid bases, boiling, high dilution and/or aging. These chelates are useful in several industries, especially in the petroleum industry for frac fluids for treating oil or gas bearing strata especially deep hot wells. The boron zirconium chelates are prepared by forming a mixture of ammonium hydroxide, water soluble amines, sodium or potassium zirconium alpha hydroxy carboxylates selected from lactates, citrates, tartrates, glycolates, maliates, saccharates, gluconates, glycerates and mandelates, with polyols such as glycerin, erythritol, arabitol, xylitol, sorbitol, dulcitol, mannitol, inositol, monosaccharides and disaccharides and with water. This mixture is blended and then boric acid or borax as a source of boron is added and the pH is adjusted using inorganic or organic bases and/or inorganic carbonates and bicarbonates. The boron zirconium chelate solutions contain 0.1-3.0% by weight ZrO.sub.2, 5-25% by weight polyols; 2-20% by weight of B.sub.2 O.sub.3 with a weight ratio of B.sub.2 O.sub.3 :ZrO.sub.2 between 5:1 and 20:1. The pH is maintained within the range 7.0-10.0.
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Geist Gary L.
Peterson Robert C.
Zirconium Technology Corporation
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