FIELD: chemistry.
SUBSTANCE: method for obtaining a porous magnetic sorbent of petroleum products is proposed. According to the invention, the synthesis of calcium monosilicate of the xonotlite structure is carried out by the interaction in the solution of calcium chloride and sodium silicate in the presence of a silane-siloxane microemulsion with obtaining hydrophobizated hydrogel. A previously obtained magnetic phase of iron oxides, represented by wuestite and maghemite is introduced into the volume of hydrogel. The said magnetic phase is precipitated with an excess of ammonium hydroxide from a mixture of solutions of salts of trivalent and ferrous iron at a ratio of Fe3+ /Fe2+, equal to 2:1. The resulting mixture is maintained until a stable hydrated precipitate is formed in the form of gel, washed and dried.
EFFECT: invention provides an improvement in the operating properties of the sorbent.
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|
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