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Non-ferrous metal oxide ore chelate collector and preparation method thereof

A technology of non-ferrous metals and collectors, applied in the field of beneficiation reagents, can solve the problems of low flotation index, low flotation index of reagent dosage, and inability to be applied on a large scale

Inactive Publication Date: 2012-07-04
SHENYANG RES INST OF NONFERROUS METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the collector is cheap in this method, it also has the disadvantages of low flotation index, poor low-temperature flotation selectivity and large dosage of reagents, which greatly limits the further popularization and application of this method.
③The direct flotation method of chelating collectors, such as hydroxamic acid, N-hydrocarbyl aminocarboxylic acids, 8-hydroxyquinoline, etc., has low dosage of chemicals and high flotation index, but there are also high prices of chemicals that cannot large scale application
[0008] However, usually the preparation method of hydrocarbyl malonate is carried out under the strong alkaline conditions of metal sodium or sodium alkoxide, which strictly requires anhydrous conditions, and the synthesis conditions are extremely harsh, so it is not suitable for large-scale industrial preparation of collectors.

Method used

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  • Non-ferrous metal oxide ore chelate collector and preparation method thereof
  • Non-ferrous metal oxide ore chelate collector and preparation method thereof
  • Non-ferrous metal oxide ore chelate collector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.3mol diethyl malonate, 0.36mol benzyl chloride, 0.33mol anhydrous potassium carbonate, and 0.003mol cetyltrimethylammonium bromide successively in the three-necked flask, and start heating to 120°C. After reacting under this stable condition for 2.0 hours, the stirring was stopped to terminate the reaction. After cooling, anhydrous potassium carbonate was removed by filtration, and unreacted benzyl chloride was distilled off under reduced pressure to obtain diethyl benzylmalonate with a yield of 88.7%. At room temperature, add diethyl benzylmalonate dropwise into a 40% NaOH aqueous solution under stirring. During the dropwise addition, a white powder substance is gradually precipitated. After the dropwise addition, continue to react for 2.0 hours, then stop stirring , and filtered to obtain white disodium benzyl malonate. Dissolve benzylmalonate disodium salt in 50mL of water by heating, add hydrochloric acid to acidify to pH=1.0 or so. The white powdery benzyl...

Embodiment 2

[0034] Add 0.3 mol of diethyl malonate, 0.36 mol of bromooctane, 0.33 mol of anhydrous sodium carbonate, and 0.003 mol of polyethylene glycol 400 into the three-necked flask in sequence, and start heating to 100°C while stirring. After reacting under this stable condition for 2.0 hours, the stirring was stopped to terminate the reaction. After cooling, anhydrous potassium carbonate was removed by filtration, and unreacted bromooctane was distilled off under reduced pressure to obtain diethyl octylmalonate with a yield of 91.3%. At room temperature, add diethyl octylmalonate dropwise into a stirred 40% NaOH aqueous solution. During the dropwise addition, a white powder substance is gradually precipitated. After the dropwise addition, continue to react for 1.0 hour, then stop stirring , and filtered to obtain white disodium octyl malonate. Dissolve octylmalonate disodium salt in 50mL of water by heating, add hydrochloric acid to acidify to about pH=1.0-2.0. Obtained octylmalon...

Embodiment 3

[0037]Add 0.3 mol of diethyl malonate, 0.42 mol of n-bromododecane, 0.33 mol of anhydrous sodium carbonate, and 0.015 mol of tetrabutylammonium bromide into the three-necked flask, and start heating to 140°C under stirring . After reacting under this stable condition for 2.0 hours, the stirring was stopped to terminate the reaction. After cooling, anhydrous potassium carbonate was removed by filtration, and unreacted dodecane bromide was distilled off under reduced pressure to obtain diethyl dodecylmalonate with a yield of 87.3%. At room temperature, add diethyl n-dodecylmalonate dropwise into a stirred 40% NaOH aqueous solution. During the dropwise addition, a white powder substance is gradually precipitated. After the dropwise addition, continue to react for 1.0 hour , stop stirring, and filter to obtain white n-dodecylmalonate disodium salt. Dissolve n-dodecylmalonate disodium salt in 50 mL of water by heating, add hydrochloric acid to acidify to about pH=1.0-2.0. The wh...

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Abstract

The invention provides a non-ferrous metal oxide ore chelate collector and a preparation method thereof. The invention is characterized in that the chelate collector is alkyl malonic acid; and the preparation method of the chelate collector is completed in three steps of reaction: 1, solid-liquid phase transfer catalytic hydrocarbylation: directly performing a solid-liquid phase reaction for 0.5 to 4.0 hours at the temperature of 60-200 DEG C by using a phase transfer catalyst, anhydrous carbonate, halogenated hydrocarbon and diethyl malonate as raw materials to prepare alkyl diethyl malonate; 2, basic hydrolysis: hydrolyzing the alkyl diethyl malonate into alkyl sodium malonate by adopting a NaOH solution condition; and 3, acidification: transforming the alkyl sodium malonate into alkyl malonic acid in the acidic condition with the pH of 0.5-6.5, cooling, crystallizing and separating a product, and filtering to obtain the product. The chelate collector has the characteristics of wide raw material sources, low production cost, simple preparation process, stable property and high collection capability and selectivity.

Description

technical field [0001] The invention relates to a metal oxide ore chelating collector and a preparation method thereof, in particular to a novel non-ferrous metal oxide ore chelating collector and a preparation method thereof, belonging to the field of ore dressing agents. Background technique [0002] With the gradual depletion of sulfide ore resources, strengthening the development of refractory non-ferrous metal oxide ores has become an inevitable choice. However, due to the complex ore-forming conditions of non-ferrous metal oxide ore, low-grade metal elements, complex composition, and poor flotation performance, the collectors used in ore dressing have unsatisfactory effects, large amounts, high costs, and poor economic benefits. How to find high-efficiency and low-toxic non-ferrous metal oxide ore collectors is a hot and difficult topic in current research. [0003] At present, there are generally three methods for the flotation of non-ferrous metal oxide ores: ①Use t...

Claims

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Application Information

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IPC IPC(8): B03D1/008C07C51/02C07C55/02C07C57/34B03D101/02
Inventor 李勇尹文新陈新林于雪刘学勇刘瑶徐耀强
Owner SHENYANG RES INST OF NONFERROUS METALS
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