METHOD OF PRODUCING SORBENT BASED ON THERMALLY EXPANDED GRAPHITE AND SORBENT Russian patent published in 2015 - IPC B01J20/20 B01J20/30 

FIELD: chemistry.

SUBSTANCE: method of producing a sorbent based on thermally expanded graphite, modified with iron-containing phases with ferrimagnetic properties, includes the following steps: (A) preparing a mixture of intercalated graphite with a solution of an iron (II) and/or iron (III) salt in an organic liquid which decomposes when heated to release methane, where concentration of the iron salt in the solution is 10-50 wt %; (B) separating the liquid phase from the obtained mixture to obtain a solid phase in the form of intercalated graphite with iron compounds deposited thereon; (C) drying the solid phase to a granular state; and (D) thermally expanding the intercalated graphite with the deposited iron compounds to obtain the end product.

EFFECT: invention enables to obtain a sorbent based on thermally expanded graphite, which contains a magnetic phase represented by ferrimagnetic magnetite and maghemite with improved operational properties.

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