The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1993
Filed:
May. 11, 1992
Sharif Sharif, Midland, TX (US);
Zirconium Technology Corporation, Midland, TX (US);
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.