Preparing method of sulfonated fatty acid phosphate rock reverse flotation collecting agent

A sulfonated fatty acid, reverse flotation technology, applied in flotation, solid separation and other directions, can solve the problems of poor low temperature resistance, poor water solubility, poor selectivity, etc., to enhance low temperature resistance, good flotation effect, improve The effect of production indicators

Inactive Publication Date: 2017-01-04
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of existing fatty acid collectors such as poor selectivity, poor water solubility, difficult dispersion, poor low temperature resistance, etc., and provide a preparation method of sulfonated fatty acid phosphate rock reverse flotation collector

Method used

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  • Preparing method of sulfonated fatty acid phosphate rock reverse flotation collecting agent
  • Preparing method of sulfonated fatty acid phosphate rock reverse flotation collecting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the mass ratio of palmitic acid and stearic acid of 0.3:1, the mixed higher fatty acid is prepared for use. Take 286g of mixed higher fatty acid and place it in a 1L three-necked flask, and melt it at 90°C. 29.18 g of concentrated sulfuric acid (mass concentration: 98%) was slowly added dropwise into the three-necked flask through a constant pressure titration funnel, and the reaction temperature was adjusted to 80° C. for 3 h. After the reaction was completed, hot water was added into the three-necked flask and stirred for 0.5 h, followed by washing with hot water to neutrality and then standing for separation to obtain the product α-sulfonated fatty acid. Prepare 200g of sodium hydroxide into a 10wt% sodium hydroxide solution, add it together with 300g of α-sulfonated fatty acid and 150g of lauric acid into an autoclave, adjust the reaction temperature to 140°C and stir for 2 hours to obtain the basic substance. Water is added to the basic material to pr...

Embodiment 2

[0023] According to the mass ratio of palmitic acid and stearic acid of 0.4:1, the mixed higher fatty acid is prepared for use. Take 286g of mixed higher fatty acid and place it in a 1L three-necked flask, and melt it at 90°C. Slowly drop 116.73 g of concentrated sulfuric acid into a three-necked flask through a constant pressure titration funnel, and adjust the reaction temperature to 80° C. for 5 h. After the reaction was completed, hot water was added into the three-necked flask and stirred for 0.5 h, followed by washing with hot water to neutrality and then standing for separation to obtain the product α-sulfonated fatty acid. Prepare 300g of sodium hydroxide into a 15wt% sodium hydroxide solution, add it together with 600g of α-sulfonated fatty acid and 400g of palmitic acid into an autoclave, adjust the reaction temperature to 150°C and stir for 3 hours to obtain the basic substance. Water is added to the basic material to prepare a solution with a solid content of 2 wt...

Embodiment 3

[0025] The mixed higher fatty acid is prepared according to the mass ratio of palmitic acid and stearic acid of 0.5:1 for later use. Take 286g of mixed higher fatty acid and place it in a 1L three-necked flask, and melt it at 90°C. Slowly drop 175.10 g of concentrated sulfuric acid into a three-necked flask through a constant pressure titration funnel, and adjust the reaction temperature to 80° C. for 6 h. After the reaction was completed, hot water was added into the three-necked flask and stirred for 0.5 h, followed by washing with hot water to neutrality and then standing for separation to obtain the product α-sulfonated fatty acid. Prepare 100g of sodium hydroxide into a 20wt% sodium hydroxide solution, add it together with 300g of α-sulfonated fatty acid and 200g of stearic acid into an autoclave, adjust the reaction temperature to 160°C and stir for 4 hours to obtain the basic substance. Water is added to the basic material to prepare a solution with a solid content of ...

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Abstract

The invention discloses a preparing method of a sulfonated fatty acid phosphate rock reverse flotation collecting agent. Firstly, palmitic acid and stearic acid are used for preparing mixed high-grade aliphatic acid according to the mass ratio of 0.3-0.6:1, the mixed high-grade aliphatic acid and concentrated sulfuric acid have a reaction according to the mass ratio of 1:0.1-0.8 to prepare alpha-sulfonated fatty acid, finally, according to the weight ratio of 3-6:1.5-4:1-3, the alpha-sulfonated fatty acid, saturated fatty acid and the strong base are mixed and react, and water is added for preparing a solution with the certain solid content. According to the method, the characteristic that a polarity sulfonic acid group of the alpha-sulfonated fatty acid can be used for enhancing complexing of carboxylic acid and calcium magnesium plasmas to form a stable coordination compound is used for achieving the aim of removing gangue minerals in pulp; meanwhile, the sulfo group introduced by the alpha position of fatty acid is the hydrophilic carboxy group, and therefore solubleness of the collecting agent at the low temperature can be greatly improved, the low-temperature resistance capacity of the collecting agent is improved, efficient floatation can be achieved at the normal temperature, and energy consumption is greatly reduced. The collecting agent has the good floatation effect on the medium-low-grade high-magnesium hard-selection phosphorite.

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 sulfonated fatty acid phosphate rock reverse flotation collector. Background technique [0002] Phosphate rock is an indispensable raw material for the production of agricultural chemical fertilizers and industrial fine phosphorus chemical products. It is an important strategic resource with the characteristics of scarcity and irreplaceability. For middle and low grade collophosite, due to its difficulty in beneficiation, rich ore has been mainly mined for more than 30 years. This mining method leads to less and less rich ore and more and more lean ore, which also makes the development and utilization of low- and medium-grade refractory colloidal phosphate rock urgent. [0003] Most of the low- and medium-grade collophosites contain high levels of harmful impurities, such as magnesium oxide and calcium carbonate, which need ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/02B03D103/06
CPCB03D1/018B03D2201/02B03D2203/06
Inventor 黄齐茂谢金玲陈明祥冯瑾瑾盛先芳
Owner WUHAN INSTITUTE OF TECHNOLOGY
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