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hydroxamates for froth flotation

Purification of kaolin clay by froth flotation using

The present invention relates to an improved froth flotation process for removing colored impurities from kaolin clay using alkyl, aryl, or alkylaryl hydroxamates as collectors, which does not require the use of activators to make these collectors adsorb selectively on the colored impurities.

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Hydroxamate composition and method for froth flotation

Hydroxamates are particularly useful in froth flotation of copper minerals particularly oxidized copper minerals. The hydroxamates used in collection of minerals generally comprise a hydrocarbyl group such as an aryl, an alkylaryl or a fatty aliphatic group.

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EP1419012B1 Hydroxamate composition and method for froth

The invention relates to a hydroxamate composition for collection of minerals by froth flotation, the composition including an aqueous mixture of hydroxamate wherein the pH of the composition is at least 11 and a method of collecting mineral values from an aqueous ore slurry by froth flotation.

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Benefication of kaolin clay by froth flotation using

Mar 01, 1992· Froth flotation is regarded as one of the most efficient methods for removing colored impurities from clay, though some variations from conventional flotation practice may be necessary for improved results. For example, the use of carrier particles or oil droplets to improve fine particle flotation has been suggested by Green [1 ] and Oliver [2

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US4629556A Purification of kaolin clay by froth

An improved flotation process for removal of colored titaniferous impurities from kaolin clay uses as collector a hydroxamate compound, or a mixture of compounds, having the formula ##STR1## in which R is an alkyl, aryl, or alkylaryl group having 4-28, and preferably 6-24 carbon atoms, and M represents an alkali metal, an alkaline earth metal or hydrogen.

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OleoFlot Flotation Reagents

OleoFlot 090 DSR is a customized tall oil fatty acid and selected distilled fatty acids from renewable crop sources. It is designed for the beneficiation of oxide base metal and phosphate minerals. OleoFlot 090 DSR can be formulated to diesel mixtures used as recovery and selectivity booster.

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US20040211933A1 Hydroxamate composition and method for

The invention relates to a hydroxamate composition for collection of minerals by froth flotation, the composition including an aqueous mixture of hydroxamate wherein the pH of the composition is at least 11 and a method of collecting mineral values from an aqueous ore slurry by froth flotation.

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The Challenge of Tungsten Skarn Processing by Froth

Consequently, scheelite has traditionally been beneficiated by froth flotation since the 1930s, when this process became a powerful route for fine particle processing. When the liberation size allows it, skarn ores can be processed by a combination of gravity separation and froth flotation.

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AU2002318997B2 Hydroxamate composition and method for

238000009291 froth flotation Methods 0.000 title claims description 21 150000003839 salts Chemical class 0.000 claims description 42 239000002002 slurries Substances 0.000 claims description 41

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A study of selective flotation recovery of rare earth

Aug 01, 2018· The versatility of froth flotation has paved way for many researchers to study the dynamics of flotation in terms of mineral particle size distribution, froth stability, pulp chemistry, and collector-mineral surface interactions. Flotation rate test measures flotation performance in terms of mass pull, recovery, and concentrate grade.

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(PDF) Reagents used in the flotation of phosphate ores: A

Hydroxamates were. chosen as collector by Assis et al. (1996) with the ob- Froth flotation is widely used as an effective method for separating apatite from dolomite. However, it is of

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Utilisation of hydroxamates in minerals froth flotation

Jan 01, 1996· Pergamon 0892--6875(95)00134-4 Minerals Engineering, Vol. 9, No. 1, pp. 103-114, 1996 Elsevier Science Ltd Printed in Great Britain 0892-6875/96 $15.00+0.00 UTILISATION OF HYDROXAMATES IN MINERALS FROTH FLOTATION S. M. ASSIS, L. C. M. MONTENEGRO and A. E. C. PERES Dept. of Mining Engineering UFMG, Rua Espirito Santo, 35/702 30160-030 Belo Horizonte,

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Hydroxamate Collectors for Rare Earth Minerals Flotation

This paper investigated the effect of five alkyl hydroxamates and two aromatic hydroxamates on the flotation of a synthetic ore composed of pure, fully liberated, malachite and quartz.

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Surface chemistry and flotation of cassiterite with alkyl

Jun 11, 2002· The flotation response of cassiterite with alkyl hydroxamates depends on the hydrophobic chain length of the surfactant and particle size of the mineral. Results indicated good floatability of the three size classes studied (−208 to +37μm) in the pH range of 5.5–9.5 with octyl, decyl and tetra-decyl hydroxamates ( Fig. 5,Fig. 7 ).

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Investigation on flotation separation of bastnaesite from

The typical collectors used in bastnaesite floatation belong to the family of oxhydryl such as hydroxamates, phosphoric acid esters and carboxylates,, . Among these collectors, hydroxamates are the most selective collectors for bastnaesite flotation,,,, . During the past decades, the flotation of bastnaesite using hydroxamic acid-based

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Froth Flotation of Iron Ores

Jan 02, 2012· With the depleting reserves of high-grade iron ore in the world, froth flotation has become increasingly important to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century’s practice in the iron ore industry, froth flotation has been established as an efficient method to remove impurities from iron ore.

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Recovery of PGMs from an oxide ore by flotation and leaching

Froth flotation is the process used in the Platinum Group Metal industry to upgrade the run-of-mine ore for subsequent processes such as smelting and hydrometallurgical PGM refining. The PGM concentrator plants achieve high PGM recoveries (>85%) when treating prestine (unweathered) sulphide ores.

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(PDF) Developments in Flotation Technology

Froth-flotation, a physico-chemical surface based process, is the most established solution, both technologically and economically compared to other alternatives for fines beneficiation.

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Process for removing toners from photocopy paper using

This invention relates to the use of hydroxamic acid and hydroxamates for collecting toner particles from paper by a froth flotation process. II. Description of the Prior Art . Froth flotation is regarded as one of the most efficient methods of removing ink particles from recycled mixed office waste. Flotation collectors such as tall oil often

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Molecular design of flotation collectors: A recent progress

The nature of froth flotation is to selectively hydrophobize valuable minerals by collector adsorption so that the hydrophobized mineral particles can attach air bubbles. In recent years, the increasing commercial production of refractory complex ores has been urgent to develop special collectors fo

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(PDF) Rare Earth Flotation Fundamentals: A Review

In addition to testing fatty aci ds and hydroxamates, Unlike the other two, there is little fundamental research on froth flotation of xenotime. Froth flotation, as a fundamental method for

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