Environmentally-friendly amine cationic collector and using method thereof
A cationic collector, an environmentally friendly technology, applied in chemical instruments and methods, solid separation, preparation of aminohydroxy compounds, etc., to achieve the effects of strong collection capacity, low price, and good foaming performance
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Embodiment 1
[0025] Take a certain amount of stearic acid and join in the three-necked flask of 250mL, under N 2 Under protection, rise to 80°C, after it is completely melted, add 0.5% hypophosphorous acid in proportion as a catalyst, then add triethanolamine, the molar ratio is stearic acid: triethanolamine=1:0.2, heat up to 170°C, and react for 6h , to obtain a light yellow transparent liquid. The temperature of the above reaction mixture was lowered to 60°C, and the introduction of N 2 , add a certain amount of organic solvent isopropanol, and slowly add ethyl chloride dropwise to carry out quaternization reaction according to the molar ratio of esterification product and ethyl chloride at a ratio of 1.0:0.99. No heating is required during the dropping process, because the The reaction is exothermic. After the dropwise addition was completed, it was heated to 80°C and reacted for 8 hours under reflux. Promptly obtain the amine cationic collector ZJ, which is used for reverse flotatio...
Embodiment 2
[0028] Take a certain amount of stearic acid and join in the three-necked flask of 250mL, under N 2 Under protection, rise to 80°C, after it is completely melted, add 0.5% hypophosphorous acid in proportion as a catalyst, then add triethanolamine, the molar ratio is stearic acid: triethanolamine=1:0.2, heat up to 170°C, and react for 6h , to obtain a light yellow transparent liquid. The temperature of the above reaction mixture was lowered to 60°C, and the introduction of N 2 , add a certain amount of organic solvent isopropanol, and slowly add ethyl chloride dropwise to carry out quaternization reaction according to the molar ratio of esterification product and ethyl chloride at a ratio of 1.0:0.99. No heating is required during the dropping process, because the The reaction is exothermic. After the dropwise addition was completed, it was heated to 80°C and reacted for 8 hours under reflux. Promptly obtain the amine cationic collector ZJ, which is used for reverse flotatio...
Embodiment 3
[0031] ZJ is a quaternary ammonium salt cationic surfactant containing an ester group, and its physical and chemical properties are as follows:
[0032] Appearance: white to light yellow powder;
[0033] Odor: No special irritating odor;
[0034] Solid content: ≥98%;
[0035] Free amine: ≥1%;
[0036] pH (5% isopropanol): 7±2;
[0037] Dissolve in water: Stir and dissolve evenly at 70-80°C.
[0038] The preparation method of ZJ is as follows: this process is carried out in two steps, the first step is esterification, adding fatty acid, triethanolamine, and catalyst into the reactor, slowly raising the temperature to 160-180°C, and reacting for 6h-8h. When there is no residual amine value in the product, it is the end of the reaction, and a light yellow transparent liquid is obtained, and the water generated by the reaction is taken out by nitrogen gas. The product after esterification is a mixture of mono-, di-, and tri-esters, with diesters as the main products. The secon...
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