The present invention relates to a flotation screening reagent for use in obtaining a concentrate of a carbonaceous compound containing a high-quality fixed carbonaceous substance or a sulfur-containing low-carbon substance on a medium or low-grade carbonaceous material, DMU-101 " as a reagent for treating a carbon compound ore on a fine-grained middle product or a product, and having a mixing property of a petroleum reagent and a general refinery reagent. However, the DMU-101 catcher is a flotation screening reagent for high-"
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