CN-121990904-A - Octaphenoxyacetic acid compound and preparation method and application thereof

Abstract

The invention belongs to the technical field of mineral processing, and particularly relates to an octoxyacetic acid compound, a preparation method and application thereof. The octanoxyacetic acid compound provided by the invention contains ether groups in the chemical structure, has stable low-temperature flotation performance, has the advantages of strong collecting capacity and good selectivity, and can obtain good mineral separation indexes when being used for oxidized ore flotation. When the soap is matched with fatty acid saponified material and oxidized paraffin soap, the excellent effect of lower dosage and better collecting performance can be obtained.

Inventors

• QI YUECHAO
• YANG KAIZHI
• LI HANWEN
• LI FANGXU
• WANG CHENGXING
• LI QIANG
• WU YAHAN
• Lv Haozi
• LI PEILUN
• ZOU JIANJIAN
• YAO YANQING

Assignees

• 广东省科学院资源利用与稀土开发研究所

Dates

Publication Date

20260508

Application Date

20260127

Claims (10)

1. 1. The octanoxyacetic acid compound is characterized by being shown in a formula (I) or (II): (I); (II); The compound of formula (I) is Xin Benyang acetic acid, wherein-C8H 17 is a straight chain or an isomer thereof; the compound of formula (II) is Xin Benyang acetic acid coupling compound, wherein-C8H 17 is straight chain or isomer thereof.
2. 2. The method for preparing the octoxyacetic acid compound according to claim 1, which is characterized by comprising the following steps: s1, mixing an octyl phenol compound and chloroacetic acid, adding an alcohol solution containing alkali, adjusting the pH to 11-12, and reacting; when the octylphenoxy acetic acid shown in the formula (I) is prepared, the octylphenol compound is selected from octylphenols shown in the formula (III); (III); -C8H17 in formula (III) is a straight chain or an isomer thereof; when preparing the Xin Benyang acetic acid coupling compound of formula (II), the octylphenol compound is selected from dimers of octylphenol of formula (IV); (IV); -C8H17 in formula (IV) is a straight chain or an isomer thereof; S2, carrying out reduced pressure distillation on the solution after the reaction in the step S1, and adding acid for neutralization to obtain the catalyst.
3. 3. The method according to claim 2, wherein the reaction temperature in step S1 is 70 to 100 ℃.
4. 4. The preparation method of claim 2, wherein the molar ratio of hydroxyl, chloroacetic acid and alkali of the octylphenol compound in the step S1 is 1 (1-1.5): 1-4.
5. 5. The preparation method according to claim 2, wherein the alkali in the step S1 is one or a combination of sodium hydroxide and potassium hydroxide, and the alcohol in the step S1 is methanol or ethanol.
6. 6. The method of claim 2, wherein the acid in step S2 is one or a combination of sulfuric acid and hydrochloric acid.
7. 7. The preparation method of the dimer of the octylphenol according to claim 2, wherein the preparation method comprises the steps of adding octylphenol with a structure shown in a formula (III), formaldehyde and sulfuric acid into a reactor, raising the temperature to a melting point, and stirring.
8. 8. The use of the octoxyacetic acid according to claim 1 in mineral flotation.
9. 9. The use according to claim 8, wherein the mineral is an oxidized mineral.
10. 10. The use according to claim 8, wherein the collector comprises, in mass percent, 40% -100% of the octoxyacetic acid compound, 0% -30% of the fatty acid saponified material and 0% -30% of the oxidized paraffin soap when used for mineral flotation.

Description

Octaphenoxyacetic acid compound and preparation method and application thereof Technical Field The invention belongs to the technical field of mineral processing, and particularly relates to an octoxyacetic acid compound, a preparation method and application thereof. Background Fatty acids consist of a long hydrocarbon chain and a terminal carboxyl group (-COOH), of formula R-COOH. In flotation it generally functions in the form of its salts. The carboxylate ions of the fatty acid are chelated with metal cations such as Ca 2+、Al3+、Fe3+ on the surface of the mineral, so that nonpolar and hydrophobic long-chain hydrocarbon of the fatty acid is fixed on the surface of the mineral, and the surface of the mineral is changed from hydrophilic to hydrophobic, so that the fatty acid is easier to attach when the fatty acid collides with filled air bubbles in a flotation cell. By means of the buoyancy of the bubbles, the mineral particles are transferred to the surface of the ore pulp, a foam layer is formed and scraped, and separation from the hydrophilic gangue minerals is achieved. Therefore, the fatty acid collector has better collecting capability on metal oxide ores, and is applied to the mineral flotation of black and white tungsten ores (the ores contain scheelite and scheelite with recovery values), bauxite, ilmenite and the like. However, the inherent disadvantages of fatty acid collectors limit their use in efficient, energy-efficient flotation. Firstly, the selectivity is poor, and because of the non-specificity of the action mechanism, the fatty acid can collect target minerals and also can collect other gangue minerals with the same metal cations. Fatty acids and their micelles may also physically adsorb to the surface of various minerals (including silicate gangue) by electrostatic or van der waals forces, resulting in non-selective physical adsorption. Secondly, the fatty acid has various forms (ions, molecules, dimers and micelles) in the ore pulp, and the different forms have different action activities on different minerals, so that the uncontrollability is high, and the selective separation is not facilitated. Finally, fatty acid collectors are not resistant to low temperatures, the solubility of fatty acid soaps in water is reduced below 10-15 ℃, the diffusion rate of fatty acid ions/molecules to the mineral surface is slowed down, and the collision and reaction rate with active points on the mineral surface is reduced. The viscosity of ore pulp is increased at low temperature, and the dispersion of bubbles and the collision efficiency of ore particles and bubbles are further reduced. More importantly, the hydrocarbon long chain of fatty acid is easier to solidify or crystallize at low temperature, and the fatty acid layer adsorbed on the mineral surface is converted into a solid rigid discontinuous film, so that the hydrophobic effect is poor. Therefore, the adoption of the fatty acid collector at low temperature leads to the deterioration of flotation indexes, and the traditional method relies on heating ore pulp to maintain the effect, so that the energy consumption is higher. Oleic acid and linoleic acid commonly used in the prior art are unsaturated fatty acids, 731 and 733 are saturated fatty acids, and for the reasons, the fatty acids are used as collectors in practical application in large amounts, so that the production cost of unit concentrate is increased, the entrainment amount of gangue minerals is increased, and the grade of the concentrate is reduced. Meanwhile, a large amount of fatty acid collectors can influence the stability of a flotation process, the operation efficiency is reduced, excessive fatty acid remains on the surface of concentrate after flotation, and adverse effects can be generated on subsequent links such as smelting, purification and the like. Therefore, the invention of the fatty acid collector with good selectivity, strong low-temperature adaptability and small dosage is needed to improve the flotation performance. Disclosure of Invention In order to solve the problems, the invention provides the octoxynol compound, the preparation method and the application thereof, and the octoxynol compound has the characteristics of good selectivity and small dosage in mineral flotation, and can provide more and better medicament selection for mineral flotation. The first aspect of the invention provides an octaphenoxyacetic acid compound shown in a formula (I) or (II): (I);(II); The compound of formula (I) is Xin Benyang acetic acid, wherein-C 8H17 is a linear chain or an isomer thereof; the compound of formula (II) is Xin Benyang acetic acid coupled compound, wherein-C 8H17 is linear or an isomer thereof. In another aspect, the present invention provides a method for preparing the octoxyacetic acid or the coupling compound, which specifically comprises the following steps: s1, mixing an octyl phenol compound and chloroacetic acid, adding an alcohol solution containing alk