Contaminant removal from coal tar-derived crude phenols
AssigneesUop LLC, China Petroleum & Chemical Corporation
InventorsLiwei Guo, Neelesh Rane
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Abstract
A process for removing contaminants from coal-derived phenols is described. The process combines an extraction process with at least two adsorption zones containing adsorbents. Liquid-liquid and acid base extraction processes can be used. The adsorbents can be clays and/or zeolites. The process can be used to reduce organonitrogen compounds and organosulfur compounds to levels below 10 ppmw and to generate a colorless product.
Claims20
A method of removing contaminants from coal-derived crude phenols comprising;
- removing organosulfur compounds and organonitrogen compounds from a crude phenol stream comprising coal-derived crude phenols using an extraction process to form an extraction effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the crude phenol stream;
- and
- removing a portion of one or more of the organosulfur compounds and the organonitrogen compounds from the extraction effluent stream using an adsorption process comprising a first adsorption zone having a first adsorbent and a second adsorption zone having a second adsorbent to form an adsorption effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the extraction effluent stream, wherein the first adsorbent comprises a clay and wherein the second adsorbent comprises a zeolite.
A method of removing contaminants from coal-derived crude phenols comprising;
- removing organosulfur compounds and organonitrogen compounds from a crude phenol stream comprising coal-derived crude phenols using an extraction process to form an extraction effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the crude phenol stream, wherein the extraction process comprises one or more of an acid-base liquid extraction process, and an aqueous methanol liquid extraction process;
- and
- removing a portion of one or more of the organosulfur compounds and the organonitrogen compounds from the extraction effluent stream using an adsorption process comprising a first adsorption zone having a first adsorbent and a second adsorption zone having a second adsorbent to form an adsorption effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the extraction effluent stream, wherein the first adsorbent comprises one or more of bentonite, bentonite-HCl activated, silica gel, sepiolite, and fuller's earth, and wherein the second adsorbent comprises HZSM-5 zeolite, and HBETA zeolite.
A method of removing contaminants from coal-derived crude phenols comprising;
- removing organosulfur compounds and organonitrogen compounds from a crude phenol stream comprising coal-derived crude phenols using an extraction process to form an extraction effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the crude phenol stream;
- and
- removing a portion of one or more of the organosulfur compounds and the organonitrogen compounds from the extraction effluent stream using an adsorption process comprising at least one adsorption zone having an adsorbent to form an adsorption effluent stream having a reduced level of one or more of the organosulfur compounds and the organonitrogen compounds compared to the extraction effluent stream, wherein the adsorbent comprises a mixture of one or more of bentonite, bentonite-HCl activated, silica gel, sepiolite, and fuller's earth and one or more of HZSM-5 zeolite, and HBETA zeolite.
Dependencies are inferred from the claim text.