Synthesis of 1-(2-Hydroxyphenyl) Dec-2-en-1-One Oxime and Its Flotation and Adsorption Behavior for Malachite

Abstract

A novel collector of 1-(2-hydroxyphenyl) dec-2-en-1-one oxime (HPDO) was synthesized from 2-hydroxy acetophenone and octanal, and its flotation and adsorption behavior for malachite were studied by flotation tests and x-ray photoelectron spectroscopy (XPS) analysis. The flotation results of a single mineral show HPDO is a special collector for malachite. Compared with benzohydroxamic acid (BHA), isobutyl xanthate (SIBX), and dodecylamine (DA), HPDO exhibits excellent flotation performance for malachite and satisfied selectivity against quartz and calcite over a wide pH range. The HPDO with a concentration of 200 mg/L can float 94% malachite at pH 8, while only recovering 7.8% quartz and 28% calcite. XPS data give clear evidence for the formation of a Cu-oxime complex on malachite surfaces after HPDO adsorption.

N-Alkylated Chitin Nanocrystals as a Collector in Malachite Flotation

“… 43 , 44 Therefore, flotation represents a remarkable market for chitin-based reagents that have an annual production of 100 gigatons in the biosphere, 45 of which 2.3 million tons are produced annually by crustaceans. 46 However, a major challenge for the exploitation of malachite is its unresponsiveness to traditional copper sulfide collectors, such as xanthates, 47 fatty amine derivates, 43 or hydroxamates. 32 Therefore, artificial talc nanoparticles, 48 alternative flotation schemes, or the sulfidation of malachite before collector adsorption have been considered 49 , 50 as alternative approaches to improve malachite recovery.…”

“…The annual copper demand in 2020 has been 26.4 million tons of which around 30% have been extracted from copper oxide ores. , Therefore, flotation represents a remarkable market for chitin-based reagents that have an annual production of 100 gigatons in the biosphere, of which 2.3 million tons are produced annually by crustaceans . However, a major challenge for the exploitation of malachite is its unresponsiveness to traditional copper sulfide collectors, such as xanthates, fatty amine derivates, or hydroxamates . Therefore, artificial talc nanoparticles, alternative flotation schemes, or the sulfidation of malachite before collector adsorption have been considered , as alternative approaches to improve malachite recovery.…”