地沟油酯化法制备浮选捕收剂

Preparation of flotation collector by gutter oil esterification

酯化法主要包括酸催化和碱催化条件下的酯化,本文将酯化后的地沟油进行碱处理,制得捕收剂,进行浮选效果试验。试验考察了醇油比、催化剂用量、温度、反应时间对磷矿伴生矿物白云石的浮选回收率的影响,结果表明:在醇油比为15∶1、催化剂用量2%、温度60℃、反应时间6h的条件下,白云石浮选回收率最佳,为55.3%。

Esterification method mainly includes acid catalysis and alkali catalytic esterification. The gutter oil esterified is sub-ject to alkali treatment to produce collector in the flotation effect tests. The tests investigated effect oil-methanol ratio and catalyst dosage, temperature and reaction time have on the recovery rate of flotation of phosphate associated mineral-dolomite. The results indicated that the best dolomite recovery rate of 55.3% could be obtained under the conditions of oil-methanol ratio of 15 ： 1, cata-lyst dosage 2%, temperature 60 ℃ and reaction time 6 hours.