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Oleamide type floating agent and preparation method thereof

An oleic acid amide type, flotation agent technology, applied in the field of flotation agents, can solve the problems of poor selectivity, low normal temperature flotation index, etc., and achieve the effects of reducing beneficiation cost, improving comprehensive efficiency of beneficiation and low price

Inactive Publication Date: 2010-07-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are poor selectivity and low normal temperature flotation index

Method used

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  • Oleamide type floating agent and preparation method thereof
  • Oleamide type floating agent and preparation method thereof
  • Oleamide type floating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Synthesis of α-chlorooleic acid amide

[0031] ①Weigh 500g of soybean oleic acid and put it in a three-necked flask, plug one end with a stopper with a glass tube (through chlorine gas) (the glass tube is inserted into the bottom of the flask), and connect the exhaust gas with a drying tube at the other end, and use sodium hydroxide for the exhaust gas. Absorb, keep the device airtight. Add a small amount of red phosphorus 1-2g as a catalyst, pass chlorine gas under mechanical stirring, adjust the chlorine gas flow rate to 80ml / min with a pressure reducing valve and a flowmeter, and control the temperature to react at 110°C for 10 hours. The product was then filtered under reduced pressure at about 130 °C to remove the mixed HCl gas and excess Cl 2 gas to obtain the desired α-chlorooleic acid.

[0032] ② Take 500mL of α-chlorooleic acid in a 1000mL three-necked flask (with a water separator), add 4.5g of silica gel (200-250 mesh) as a catalyst, and place the three...

Embodiment 2

[0036] (1) Synthesis of α-chlorooleic acid amide

[0037] Get the alpha-chlorooleic acid of 1000mL (the preparation of alpha-chlorooleic acid is with embodiment 1, but vegetable oleic acid adopts rapeseed oleic acid) in the there-necked flask (with water separator) of 2000mL, add 10g silica gel As a catalyst, the three-necked flask was heated on an oil bath, the temperature was raised to 160°C, and ammonia gas was introduced at a rate of 100L / h, and the reaction was carried out for 12h to obtain a brown-black paste product α-chlorooleic acid amide.

[0038] (2) Synthesis of oleic acid amide

[0039] Take 1000mL of soybean oleic acid in a 2000mL three-necked flask (with a water separator), add 10g of silica gel as a catalyst, heat the three-necked flask on an oil bath, heat it up to 160°C, and feed it at a speed of 100L / h Ammonia, reacted for 12h to obtain oleic acid amide as a brown-black paste.

Embodiment 3

[0041] (1) Synthesis of α-chlorooleic acid amide

[0042] Get the α-chlorooleic acid of 1000mL (the preparation of α-chlorooleic acid is the same as Example 1) in the there-necked flask (with a water separator) of 2000mL, add 10g of silica gel as a catalyst, and place the there-necked flask in an oil bath Heating on the pot, heating up to 170°C, feeding ammonia gas at a rate of 100L / h, and reacting for 10h to obtain α-chlorooleic acid amide as a brown-black paste product.

[0043] (2) Synthesis of oleic acid amide

[0044] Take 1000mL of soybean oleic acid in a 2000mL three-necked flask (with a water separator), add 10g of silica gel as a catalyst, heat the three-necked flask on an oil bath, heat it up to 170°C, and feed it at a speed of 100L / h. Ammonia, reacted for 10h to obtain oleic acid amide as a brown-black paste.

[0045] Alpha-chlorooleic acid amide and oleic acid amide flotation agent prepared in Example 1 are respectively used for flotation of a certain refractory ...

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Abstract

The invention relates to an oleamide type floating agent and a preparation method thereof. The oleamide type floating agent is prepared by vegetable oil acids and ammonia gas, wherein the molar ratio of the vegetable oil acids and the ammonia gas is 1 to 2-3, or the oleamide type floating agent also comprises chlorine gas, wherein the molar ratio of the vegetable oil acids, the chlorine gas and the ammonia gas is 1 to 2-3 to 2-3. The method comprises the following steps: 1) preparing the vegetable oil acids, the chlorine gas and the ammonia gas; 2) taking the vegetable oil acids to be put in a container, adding a catalyst, and continuously adding the chlorine gas to obtain a pha-chloro oil acid; 3) taking the pha-chloro oil acid obtained in step 2) to be put in the container, adding the catalyst, adding the ammonia gas, heating stirring for raising temperature, and continuously reacting for10-12 hours. Compared with conventional higher fatty acids, the oleamide type floating agent significantly improves the selectivity of phosphorus, has the better flotation effect, and significantly improves the comprehensive efficiency of mineral processing. The oleamide type floating agent has the advantages of easy obtaining of materials, low cost and simple synthetic route, and reduces the cost of mineral processing.

Description

technical field [0001] The invention relates to a flotation agent, in particular to an oleic acid amide type flotation agent and a preparation method thereof. Background technique [0002] The reserves of phosphate rock resources in my country are large, second only to the United States and Morocco, ranking third, and the distribution of phosphate rock is also relatively concentrated. However, there are few rich ore resources, more medium and low grade ore, less easy beneficiation, and great difficulty in mining. Therefore, it is of great significance to strengthen the research on flotation technology of medium and low grade phosphate rock. Some traditional methods of flotation of phosphate rock mainly use anionic surfactants such as higher fatty acid salts as collectors, and the effect is not very good at room temperature. Its main shortcomings are poor selectivity and low normal temperature flotation index. In view of the deficiencies of fatty acid flotation agents, pol...

Claims

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Application Information

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IPC IPC(8): B03D1/018C07C233/09C07C231/02B03D101/02B03D103/04
Inventor 黄齐茂潘志权陈德明瞿定峰周红胡学雷
Owner WUHAN INSTITUTE OF TECHNOLOGY
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