Published July 12, 1988 | Version v1
Patent Metadata-only

Process for the obtainment of boric acid from colemanite and/or howlite minerals

Creators

Description

A process for obtaining boric acid from colemanite minerals, howlite minerals, or mixtures thereof is described comprising: treating the mineral with sulfuric acid to dissolve boron compounds; separating the solution thus formed from the insoluble solids in suspension; reacting the solution with hydrogen sulfide to precipitate arsenic and iron impurities; separating the impurities precipitated from the remaining solution; cooling the remaining solution to precipitate boric acid; and separating the boric acid from the remaining solution

Availability note (English)

U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.

Additional details

Publishing Information

Imprint Pagination
vp.
IPC:
Int. Cl. C01B 35/12.
IPC
Int. Cl. C01B 35/12.
Patent number
US patent document 4,756,894/A/

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
20001691
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
ACIDIFICATION; ARSENIC; BORIC ACID; BORON COMPOUNDS; COOLING; DISSOLUTION; IRON; MINERALS; PRECIPITATION; PRODUCTION; PURIFICATION; SOLUTES; SULFURIC ACID; SUSPENSIONS
Descriptors DEC
DISPERSIONS; ELEMENTS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; METALS; OXYGEN COMPOUNDS; SEMIMETALS; SEPARATION PROCESSES; SULFUR COMPOUNDS; TRANSITION ELEMENTS