Collophane reverse flotation collector and preparation method thereof

The invention discloses a collophane reverse flotation collector and a preparation method thereof. The collector is prepared from, by mass, 30-40% of mixed fatty acid, 0.5-1.5% of polyoxyethylene fatty alcohol sodium sulfate and the balance water. The preparation method includes the following steps that all the components of the collophane reverse flotation collector are evenly mixed according to the mass friction at the temperature of 60-70 DEG C. The collophane reverse flotation collector has good collecting performance and selectivity, the using amount of a flotation agent is used, and cost is saved. The preparation method is simple and convenient to operate and can be easily popularized industrially; and the collophane reverse flotation collector is free of toxin and pollution and is an environment-friendly flotation agent. The collophane reverse flotation collector can be widely applied to reverse flotation of medium-grade and low-grade collophane.