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Dihydroxy fatty acid soap collecting agent and preparation method thereof

A technology of dihydroxy fatty acid and hydroxy fatty acid, which is applied in the field of collectors, can solve the problems of inability to meet the requirements of collophosphate beneficiation, increased production cost of beneficiation, poor foam fluidity, etc., and achieves good collection performance and low beneficiation cost. , Good anti-hard water effect

Inactive Publication Date: 2018-11-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the interbedded relationship between collophosite and dolomite in these collophosites is complex, requiring high grinding fineness, and the production cost of mineral processing has increased significantly. In recent years, the development of flotation agents has mainly focused on the multifunctionalization of the hydrophilic end, Currently commonly used fatty acid collectors have poor foam fluidity, resulting in low separation efficiency, poor selectivity, intolerance to hard water, poor water solubility, and poor low-temperature performance, which cannot meet the beneficiation requirements of this type of collophanite.

Method used

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  • Dihydroxy fatty acid soap collecting agent and preparation method thereof
  • Dihydroxy fatty acid soap collecting agent and preparation method thereof
  • Dihydroxy fatty acid soap collecting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare dihydroxy fatty acid soap collector, concrete steps are as follows:

[0027] Take 40g of oleic acid in a beaker, slowly add 0.8g of 98% concentrated sulfuric acid and 10.8g of peracetic acid, stir and heat up to 60°C for 8 hours at a heating rate of 1°C / min, and then transfer the reaction solution to In the separatory funnel, the aqueous solution of the lower layer was separated, and the organic phase was washed several times with water to obtain epoxy fatty acid.

[0028] According to weight percentage, take 42.3g epoxy fatty acid, 17g stearic acid, 8.5g sodium hydroxide, 32.0g water and 1g diethyl phthalate, put them in a flask, mix well, heat to 120°C and stir to react 6 After the reaction is completed, the material is discharged and cooled to obtain a bishydroxy fatty acid saponin phosphate rock collector.

[0029] figure 1 It is the infrared spectrogram of the dihydroxy fatty acid soap collector obtained in the present embodiment. like figure 1 , the st...

Embodiment 2

[0032] Prepare dihydroxy fatty acid soap collector, concrete steps are as follows:

[0033] Take 200g of oleic acid in a beaker, slowly add 5g of 98% concentrated sulfuric acid and 60.8g of peracetic acid, stir and heat up to 100°C for 4 hours at a heating rate of 2°C / min. In the liquid funnel, the aqueous solution of the lower layer was separated, and the organic phase was washed several times with water to obtain epoxy fatty acid.

[0034] Batching according to weight percentage, get 200g epoxy fatty acid, 100g stearic acid, 48g sodium hydroxide, 150g water and 7.5g diethyl terephthalate are placed in the flask, mix evenly, heat to 80 ℃ and stir reaction for 8 hours, After the reaction is completed, the material is discharged and cooled to obtain a bishydroxy fatty acid saponin phosphate rock collector.

Embodiment 3

[0036] Sodium oleate, bishydroxy fatty acid soap colloidal phosphate rock collectors prepared in Example 1 and Example 2 were used as collectors, and a collophosite in Haikou, Yunnan Province was flotationed by reverse flotation technology.

[0037] The specific method is: Grind the collophosite until the grinding fineness -0.074mm mass fraction reaches 85-90%, pour it into the flotation tank, add water to obtain a pulp with a mass concentration of 33.3%, adjust the pulp with 10% dilute sulfuric acid The pH value is 4 to 5, and phosphorus inhibitor (phosphoric acid) is added, and then the collector is added to the pulp at an amount of 1.2Kg / t collophosite (the cost of mineral processing is about 7.2 yuan / t ore), and fully stirred Evenly, the dolomite is floated out in the flotation cell by the first-rough and second-sweep process.

[0038] During the flotation process, the scraping time is about 5-7 minutes, the defoaming time is about 7-10 minutes, and the foam fluidity is go...

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Abstract

The invention relates to a dihydroxy fatty acid soap collecting agent and a preparation method thereof. The structural formula of the dihydroxy fatty acid soap collecting agent is as follows, whereinC8H17 is a linear chain eight-carbon alkyl group. Compared with an existing collecting agent, the dihydroxy fatty acid soap collecting agent has the beneficial effects that the dihydroxy fatty acid soap collecting agent has efficient selectivity to dolomite, the mine carrying capacity is high, the agent dosage is 0.8-1.2 Kg / t collophanite, the foam flowability is good, the foam scraping time is about 5-7 minutes, the defoaming time is about 7-10 minutes, the collecting property is good, the overall mineral separation efficiency is 82.31%-83.44%, raw materials are easily obtained, the mineral separation cost is low (about 4.8-7.2 yuan / t mineral), the dihydroxy fatty acid soap collecting agent has good hard water resistance to Ca2+ and Mg2+ ions, low temperature flotation can be conducted atabout 10 DEG C, and the dihydroxy fatty acid soap collecting agent is suitable for the field of collophanite flotation.

Description

technical field [0001] The invention relates to a collector, in particular to a dihydroxy fatty acid soap collector and a preparation method thereof. Background technique [0002] Collephate is the basic raw material of phosphate fertilizer and phosphate, which plays a very important role in agricultural production and food security. my country's phosphate rock is "abundant but not rich". Currently, the grade of collophosite mined is generally 17-18%P 2 o 5 . The grade of phosphate ore directly processed to produce phosphate fertilizer and phosphate must be greater than 28%P 2 o 5 , so these mined collophanites must be enriched by flotation before they can be processed and utilized. Moreover, the interbedded relationship between collophosite and dolomite in these collophosites is complex, requiring high grinding fineness, and the production cost of mineral processing has increased significantly. In recent years, the development of flotation agents has mainly focused on ...

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 潘志权陈凯周红程清蓉张华丽
Owner WUHAN INSTITUTE OF TECHNOLOGY
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