PROCESS FOR CLEANING OF COKE TARS WITH HIGH SOLIDS CONTENT

摘要

PROCESS FOR CLEANING OF COKE TARS WITH HIGH SOLIDS CONTENT S OF THE DISCLOSURE A method of cleaning coke tars having a high content of contaminating solid matter, which are produced in various crude gas separation processes. The high-solids tar is first centrifuged and then filtered in candle filters, while adding small amounts of, or no, filtering aids and/ or diluting substances, to give the tar a consistency suitable for further processing. The tar to be filtered in the candle filters may be either coke tar coming from a coke oven battery operated with preheated coal and having a solids content higher than 30%, or even the usual heavy tar. Before filtering, the tar is subjected to centrifuging.