COMPLEX METHOD OF CONVERTING COAL CONTAINING RAW MATERIAL INTO LIQUID PRODUCTS
Russian Federation Patent
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Abstract
FIELD: mining. ^ SUBSTANCE: invention refers to complex method of converting coal containing raw material into liquid products by means of combined implementation of at least following seven process blocks: liquation of coal (CL), instantaneous evaporation or rectification of product produced from liquation (IE), extraction with dissolvent for removal of non-combustible substances (ED), rectification for separation of dissolvent (SD), conversion with hydrogenation with catalyst in suspension phase (CH), rectification or instantaneous evaporation of product produced with conversion with hydrogenation (R), and de-asphalting with solvent; the method is characterised with following: it consists of phases - directing raw material containing coal to one or more, than one, stage (CL) of direct liquation of coal at presence of suitable catalyst of hydrogenation in disperse phase, and also at presence of hydrogen or hydrogen and H2S, - directing flow containing product obtained from reaction of coal liquation to one or more, than one, stage (IE) of instantaneous evaporation or rectification producing gaseous flow and liquid flow,- directing liquid flow to stage (ED) of extraction with dissolvent, which results in producing non-soluble flow consisting of mineral substance present in raw material and of not-reacted coal and liquid flow consisting of produced liquefied coal and applied dissolvent, - directing liquid flow consisting of liquefied coal and applied dissolvent to one or more stages of rectification to separate in essence dissolvent contained in liquid flow, which is returned to stage (ED) of extraction with dissolvent; - mixing liquid flow in essence consisting of liquefied coal and at least part of flow containing pyrobitumens produced in block of de-asphalting with suitable catalyst in disperse phase and directing obtained mixture to reactor of hydro-processing (CH) supplying hydrogen or mixture of hydrogen and H2S into it, - not necessary directing flow containing product of reaction of hydro-processing and catalyst in disperse phase to preliminary stage of separation, performed at high pressure with production of light and heavy fractions , - directing flow containing product of reaction of hydro-processing and catalyst in disperse phase or heavy fraction produced by means of stage of separation at high pressure to one or more, than one, stage (R) of rectification or instantaneous evaporation, which results in separation of different fractions obtained from reaction of hydro-processing, - directing at least part of residue after rectification (resin) or liquid leaving block of instantaneous evaporation containing catalyst in disperse phase rich with sulphides of metals produced by means of de-metallisation of raw material and, possibly, coke into zone of (D) de-asphalting at presence of solvents, into which, possibly, there is supplied at least one fraction of liquid flow in essence consisting liquefied coal obtaining two flows: one consisting of de-asphalted oil (DAO), and another - containing pyrobitumen. ^ EFFECT: high degree of raw material conversion obtaining products with low contents of resin and other impurities. ^ 50 cl, 3 ex, 3 tbl, 1 dwg
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