Chemistry of inorganic compounds – Boron or compound thereof – Oxygen containing
Patent
1988-03-16
1989-02-14
McFarlane, Anthony
Chemistry of inorganic compounds
Boron or compound thereof
Oxygen containing
423 87, 423122, 423166, 423286, 423397, 423629, C01B 3510
Patent
active
048045241
ABSTRACT:
A process for the preparation of boric acid from colemanite and/or howlite minerals basically comprising: treating the mineral with sulfuric acid in order to dissolve boron compounds from the minerals; separating a solution formed by the chemical reaction, from the solids in suspension; reacting said solution with hydrogen sulfide in order to precipitate arsenic and iron impurities contained in the solution; separating the impurities precipitated from the remaining solution; reacting said remaining solution with ammonia so as to precipitate aluminum impurities; separating said aluminum impurities form the remaining solution; reacting the latter with hot sulfuric acid in order to generate boric acid; cooling the reaction mixture in order to precipitate the boric acid; and separating the boric acid from the remaining solution, being the latter susceptible to be recycled to the sulfuric acid treatment stage in order to concentrate the mineral. Also regeneration of ammonia is achieved so as to be used again in the process.
REFERENCES:
patent: 2089406 (1937-08-01), Newman
patent: 3482936 (1969-12-01), Russell
patent: 3650690 (1972-03-01), Shiloff
patent: 3653818 (1972-04-01), Mathis
patent: 4196177 (1980-04-01), Sallay
patent: 4329154 (1982-05-01), Shono et al.
patent: 4435184 (1984-03-01), Schroeder et al.
Materias Primas Magdalena, S.A. De C.V.
McFarlane Anthony
LandOfFree
Process for the preparation of boric acid from colemanite and/or does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of boric acid from colemanite and/or, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of boric acid from colemanite and/or will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1364520