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Preparation method of modified fatty acid type collophanite reverse flotation collector

A reverse flotation, fatty acid technology, applied in flotation, solid separation, etc., can solve the problems of poor selectivity, poor adaptability, etc., and achieve the effects of good forming ability, easy operation, and simple preparation process

Inactive Publication Date: 2016-11-09
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the common disadvantages of poor selectivity and poor adaptability of the existing fatty acid

Method used

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  • Preparation method of modified fatty acid type collophanite reverse flotation collector
  • Preparation method of modified fatty acid type collophanite reverse flotation collector

Examples

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preparation example Construction

[0017] A preparation method of a modified fatty acid type collophanite reverse flotation collector can be specifically divided into the following four steps:

[0018] A First, mix oleic acid with a molar ratio of 1-3:1 and concentrated sulfuric acid (98wt%) evenly and stir at 80-90°C for 3-5h to obtain sulfonated oleic acid.

[0019] B put sulfonated oleic acid with a molar ratio of 1:2 and sodium hydroxide solution or potassium hydroxide solution with a concentration of 10-75wt% in a high-pressure reactor and mix evenly, and heat up to 140-180°C to make it react 3- After 5 hours, the pH of the product was adjusted to neutral with sulfuric acid, and then left to stand for separation to obtain median hydroxyoleic acid.

[0020] C According to the weight ratio of 4-7:1-4:0.5-2, add middle hydroxy oleic acid, saturated higher fatty acid (lauric acid or stearic acid or palmitic acid), strong base (KOH or NaOH) to appropriate amount of water and mix Evenly, heat up to 60-100°C and...

Embodiment 1

[0023] Add 98wt% concentrated sulfuric acid to oleic acid at a molar ratio of 1:1, adjust the reaction temperature to 90° C. for 3 h and cool to obtain sulfonated oleic acid. Then put sulfonated oleic acid with a molar ratio of 1:2 (the molar ratio of sulfonated oleic acid to solute sodium hydroxide, the same below) and a sodium hydroxide solution with a concentration of 15 wt% in an autoclave at 140°C for reaction After 3 hours, the product was acidified with sulfuric acid to adjust the pH to neutral, left to stand, and separated to obtain median hydroxyoleic acid. Add 0.4kg of median hydroxyoleic acid, 0.1kg of lauric acid, and 0.05kg of potassium hydroxide to a small amount of water, adjust the temperature to 60°C and stir mechanically for 4 hours to obtain the basic substance. Water is added to the basic material to prepare an aqueous solution with a solid content of 2 wt%, and the reverse flotation collector is obtained. Solution solid content = mass of raw materials use...

Embodiment 2

[0025] Add 98wt% concentrated sulfuric acid to oleic acid at a molar ratio of 5:3, adjust the reaction temperature to 80°C for 3 hours and cool to obtain sulfonated oleic acid. Then put the sulfonated oleic acid with a molar ratio of 1:2 and the sodium hydroxide solution with a concentration of 15wt% in an autoclave and react at 160°C for 4 hours, acidify the product with sulfuric acid to adjust the pH to neutral, let stand and separate The meso-hydroxyoleic acid is obtained. Add 0.7kg of median hydroxyoleic acid, 0.4kg of palmitic acid, and 0.2kg of sodium hydroxide into a small amount of water, adjust the temperature to 100°C and mechanically stir for 6 hours to obtain the basic substance. Water is added to the basic material to prepare an aqueous solution with a solid content of 2 wt%, and the reverse flotation collector is obtained.

[0026] In order to verify the actual reverse flotation effect of the new collophanite reverse flotation collector prepared in Examples 1-2 ...

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Abstract

The invention relates to a preparation method of a modified fatty acid type collophanite reverse flotation collector. The preparation method comprises the following steps: a, uniformly mixing oleic acid with concentrated sulfuric acid according to the mole ratio being (1 to 3):1, and heating and reacting to obtain sulfonated oleic acid; b, placing the sulfonated oleic acid and a strongly alkaline solution according to the mole ratio being 1:2 in a high-pressure reactor, uniformly mixing, raising the temperature to react a mixture, adjusting a pH value of a product to neutral and then standing and separating to obtain median hydroxyl oleic acid; c, adding the median hydroxyl oleic acid, saturated higher fatty acid and strong base according to the weight ratio being (4 to 7): (1 to 4):(0.5 to 2) into a proper amount of water, uniformly mixing, raising the temperature and stirring to obtain a basic substance; and d, preparing the basic substance into 2 weigh percent of solution. According to the preparation method disclosed by the invention, a specific functional group is introduced on the oleic acid and is chemically modified to enhance the collecting capability of the oleic acid; meanwhile, modified oleic acid, the strong base solution and fatty acid are compounded and optimized; and the obtained novel reverse flotation collector has the advantages of strong normal temperature selectivity, good foamability, high concentration efficiency, and the like.

Description

technical field [0001] The invention belongs to the technical field of phosphate rock flotation, and in particular relates to a preparation method of a modified fatty acid type collophanite reverse flotation collector. Background technique [0002] Phosphate rock refers to phosphate minerals with economic value and is the main chemical raw material. At present, most of the phosphate rocks in our country belong to low- and medium-grade collophosite, which need to be enriched for industrial processing and use. Collephosite with high impurity MgO content can be effectively utilized through reverse flotation, and collectors play a vital role in flotation. [0003] Fatty acids are the most commonly used class of collectors. Although traditional fatty acid collectors have the advantages of wide sources and low price, they all have disadvantages such as poor selectivity and poor adaptability. These make the use and promotion of fatty acid collectors restricted to a certain exten...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D101/02B03D103/06
CPCB03D1/018B03D2201/02B03D2203/06
Inventor 黄齐茂李欢陈明祥冯瑾瑾盛先芳
Owner WUHAN INSTITUTE OF TECHNOLOGY