Chemistry of inorganic compounds – Boron or compound thereof – Oxygen containing
Patent
1995-10-18
1997-11-18
Langel, Wayne A.
Chemistry of inorganic compounds
Boron or compound thereof
Oxygen containing
423280, C01B 3512
Patent
active
056884818
ABSTRACT:
An improved method is provided for producing crystalline calcium hexaborate tetrahydrate, synthetic nobleite, by the reaction of boric acid and lime in an aqueous slurry. Reaction conditions include boric acid to water molar ratios of greater than 0.25:1, lime to boric acid molar ratios in the range of 0.05-0.15:1 and temperatures in the range of 85.degree.-105.degree. C. A novel crystalline product is produced having a unique crystal habit resulting in improved physical properties. Dehydration of this product produced a novel amorphous, anhydrous product having similar crystal habit and physical properties.
REFERENCES:
patent: 3032391 (1962-05-01), Ball et al.
patent: 3032392 (1962-05-01), Nies et al.
patent: 3337292 (1967-08-01), Wieder et al.
patent: 3337293 (1967-08-01), Wieder et al.
patent: 4179493 (1979-12-01), Sadan
patent: 4233051 (1980-11-01), Eastes
patent: 4683126 (1987-07-01), Inoue et al.
Ditte, Production par voie seche de quelques borates crystallises, Acad. Sci. Paris Comptes rendus, vol. 77, pp. 783-785 (1873) (with translation).
Erd et al., Nobleite, Another New Hydrous Calcium Borate From the Death Valley Region, Calif., American Mineralogist, vol. 46, pp. 560-571 (1961).
Lehmann et al., "Uber Bildungs und Existenzbedingungen von Gowerit, CaB.sub.6 O.sub.10. 5 H.sub.2 0, und Nobleit, CaB.sub.6 O.sub.10.4 H.sub.2 O, sowie ihre, Umwandlung in Ca.sub.3 B.sub.20 O .sub.33.12 H.sub.2 O".
Zeitschrift fur Anorganische und Allgemeine Chemie, Band 346, pp. 12-20 (1966).
Lehman, et al., Chemical Abstracts vol. 65, 14808 (1966).
Kemp, "The Chemistry of Borates", 1956, pp. 68-71, Borax Consolidated Limited, London, S.W.L.
Mellor, "Supplement to Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry", vol. V, Part A, pp. 550-551 (1980).
Meyerhoffer et al., Liebig's Ann., 351, pp. 100-107 (1907).
Meyerhoffer et al., Chemical Abstracts, vol. 1, 1236 (1907).
Van't Hoff, J. H. (1907), Untersuchungen uber die Bildung der ozeanischen Salzablagerungen. LI. Borocalcit und die kunstliche Darstellung von Ascharit: Sitzungsber. Konigl. Van't Hoff, Chemical Abstracts, vol. 1, 2864 (1907).
Sborgi, Umberto (1913), Sistema CaO-B.sub.2 O.sub.3 -H.sub.2 O a 30.degree.: Atti. Accad. Lincei, 5th ser., 22, pp. 636-642, 715-719, 798-801.
Sborgi, Chemical Abstracts, vol. 7, 3092 (1913).
Nikolaev, A. V. and Chelishcheva, A. G. (1940), The 25.degree. isotherm of the systems: CaO+B.sub.2 O.sub.3 +H.sub.2 O and MgO+B.sub.2 O.sub.3 +H.sub.2 O: Comptes rendus (Doklady) Acad. Sci. U.R.S.S., 28, 127-130.
Lehmann et al., "Uberdie Hydratedes Calcium (1:1) borates Ca(BO.sub.2).sub.2.6H.sub.2 O und Ca(BO.sub.2).sub.2.4H.sub.2 O", Zeitschriftfur Anorganische und Allgemeine Chemie, Band 320, pp. 255-260 (1963).
Langel Wayne A.
Thornton James R.
U.S. Borax Inc.
LandOfFree
Method for producing calcium borate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing calcium borate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing calcium borate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1563566