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1. 发明申请

WO1989002416A1 INTEGRATED COAL CLEANING PROCESS WITH MIXED ACID REGENERATION 审中-公开
标题翻译：具有混合酸再生的综合煤清洗工艺
公开(公告)号：WO1989002416A1
公开(公告)日：1989-03-23
申请号：PCT/US1987002400
申请日：1987-09-21
申请人： WILLIAMS TECHNOLOGIES, INC.
发明人： WILLIAMS TECHNOLOGIES, INC. , KINDIG, James, Kelly , REYNOLDS, James, E.
IPC分类号： C01L09/02
CPC分类号： C10L9/02
摘要： The invention comprises producing clean coal having a mineral matter content of less than about 5 percent by leaching feed coal (2) crushed or sized to less than about 1 inch with a mixture of hydrochloric and hydrofluoric acids (104) comprising less than about 70 weight percent HF and less than about 38 weight HCl at atmospheric pressure and a temperature below the boiling point of the acid; washing the leached residue substantially free of spent acids and dissolved solids (108); separating pyrite from the coal by physical means (110); reducing halogens on the coal by thermal treatment (114); and regenerating the mixture of HF and HCl by dual pyrohydrolysis and suflation of the spent acids (109) to recover substantially all the fluorine value except for that reporting to waste as MgF2 either as HF or as volatile fluorides which are recycled.
摘要翻译：本发明包括通过用包含小于约70重量份的盐酸和氢氟酸（104）的混合物浸出粉碎或尺寸小于约1英寸的原料煤（2）来生产矿物质含量小于约5％的洁净煤在大气压和低于酸沸点的温度下，HF和小于约38重量％HCl; 洗涤浸出的残余物基本上不含废酸和溶解的固体（108）; 通过物理手段从煤中分离黄铁矿（110）; 通过热处理减少煤上的卤素（114）; 并通过双重热水解和废酸（109）的充气再生HF和HCl的混合物，以回收基本上所有的氟值，除了作为MgF 2作为HFF或作为再循环的挥发性氟化物报告为废物。

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