Application for gemini quaternary ammonium salt collecting agent
A Gemini quaternary ammonium salt and collector technology, which is applied in the direction of solid separation and flotation, can solve the problems of poor selectivity, difficult collectors, and inability to realize flotation separation of scheelite and calcite, and achieve The effect of high selectivity, high selectivity and good flotation effect
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[0021] In the present invention, the preparation method of hexane-1,6-didodecyldimethylammonium bromide preferably includes the following steps:
[0022] 1,6-Dibromohexane, dodecyl tertiary amine, and ethanol are mixed to perform a quaternization reaction to obtain the hexane-1,6-didodecyldimethylammonium bromide.
[0023] In the present invention, unless otherwise specified, the medicaments are all commercially available products well known to those skilled in the art.
[0024] In the present invention, the molar ratio of 1,6-dibromohexane and tertiary dodecylamine is preferably 1:2.2. The present invention does not limit the amount of the ethanol, as long as it can fully dissolve 1,6-dibromohexane and tertiary dodecylamine; the ethanol in the present invention is a solvent. In the present invention, the quaternization reaction is preferably carried out under a protective atmosphere; the protective atmosphere is preferably nitrogen. In the present invention, the quaternization rea...
Example Embodiment
[0034] Example 1
[0035] Put 2g scheelite sample into the flotation tank, add the deionized water according to the mass ratio of the sample to the deionized water of 1:17, use the hanging tank flotation machine, stir for 2min under the condition of 1704rpm to obtain the primary Slurry; Adjust the pH value of the primary slurry to 7 at room temperature with 1mol / L HCl solution and NaOH solution as the pH regulator, and stir at 1704rpm for 1 min to keep the pH at 7 to obtain a slurry;
[0036] Add 0.5×10 to the obtained slurry -4 mol / L Gemini quaternary ammonium salt collector hexane-1,6-didodecyl dimethyl ammonium bromide, stirred for 3 minutes, and then proceeded to mineral flotation and foaming. The flotation time was 3 minutes to obtain the concentrate ( Foam products) and tailings (products in the tank); see the process flow chart figure 1 .
[0037] Put the concentrate and tailings into a vacuum drying oven to dry and weigh, and calculate the recovery rate according to formula...
Example Embodiment
[0047] Example 2
[0048] Put 2g scheelite sample into the flotation tank, add the deionized water according to the mass ratio of the sample to the deionized water of 1:17, use the hanging tank flotation machine, stir for 2min under the condition of 1704rpm to obtain the primary Slurry; Adjust the pH value of the primary slurry to 11 at room temperature with 1mol / L HCl solution and NaOH solution as the pH regulator, and stir at 1704rpm for 1 min to keep the pH at 11 to obtain a slurry;
[0049] Add 0.5×10 to the obtained slurry -4 mol / L Gemini quaternary ammonium salt collector hexane-1,6-didodecyl dimethyl ammonium bromide, stirred for 3 minutes, and then proceeded to mineral flotation and foaming. The flotation time was 3 minutes to obtain the concentrate ( Foam products) and tailings (products in the tank).
[0050] The recovery rate of scheelite is calculated according to formula I, and the recovery rate of scheelite is 95.05%.
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