2-ethyl-2-hexenyl hydroximic acid as well as combined collector thereof and application of 2-ethyl-2-hexenyl hydroximic acid and combined collector

Abstract

The invention discloses 2-ethyl-2-hexenyl hydroximic acid as well as a combined collector thereof and an application of 2-ethyl-2-hexenyl hydroximic acid and the combined collector. The combined collector of 2-ethyl-2-hexenyl hydroximic acid consists of 2-ethyl-2-hexenyl hydroximic acid, 2-ethyl-2-methyl hexenoate and 2-ethyl-2-hexenoic acid, wherein the mass percentage of 2-ethyl-2-hexenyl hydroximic acid is not less than 60%. The combined collector is liquid at normal temperature, and has the characteristics of low freezing point, good dispersing performance in ore pulp, strong collector performance and the like. Hexenyl hydroximic acid and the combined collector of hexenyl hydroximic acid are obtained by performing esterification on 2-ethyl-2-hexenoic acid and methanol and then performing hydroxyl oximation with hydroxylamine, are mild in preparation condition, do not need to be acidified, and can not generate wastewater.

Description

technical field [0001] The invention belongs to the field of flotation agent and its preparation, and mainly relates to a novel alkenyl hydroxamic acid and its combined collector and their application. Background technique [0002] Hydroxamic acid is a typical chelating agent with high selectivity for metal ions. Oxygen and nitrogen containing lone pairs of electrons and close to each other in its molecular structure enable it to chelate with metal ions to form stable chelates. The practice at home and abroad has proved that hydroxamic acid has the advantages of strong collection ability, good selectivity, low toxicity, etc., and it is used in the flotation of ores such as tungsten ore, rare earth ore, tin ore and ilmenite, and has achieved ideal results. Sorting effect, it is a kind of oxide ore collector with development prospect. [0003] In my country, most sulfide deposits have oxidation zones on the upper part, and some deposits are oxidized to become medium-sized ox...

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Problems solved by technology

CN103301953A discloses a collector of 6-aryl amidohexyl hydroxamic acid, which overcomes the problem of amide breakage caused by traditional hydroximation reactions under heating and strong alkali conditions, and prepares Synthetic amidohydroxamic acid collector, which has strong collection ability for minerals such as tungsten ore, rare earth ore, tin ore or bauxite

[0004] At present, the hydroxamic acids for industrial application are mainly benzohydroxamic acid, salicylic hydroxamic acid and C 5～9 Alkyl hydroxamic acid, etc., have good selectivity. Although the collection capacity is constantly improving, the collection capacity is always weak, and the preparation process needs to be acidified first and then saponified, which limits their popularization and application.

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