SU1012969A1 - Method of producing polymeric based ferrocyanide sorbent - Google Patents

Abstract

A METHOD FOR OBTAINING A FERROSHANE SORBENT ON A POLYMERIC BASIS, including the interaction of a salt of a heavy metal and an alkali metal ferrocyanide with the formation of an icy ferrous alkali metal and a heavy metal, distinguished by 4Tti with an increased capacity and a sorbent, a non-woven, a non-woven, not ipodic, heavy metal, heavy metal, heavy metal and ferrocyanide treated with a solution: n-chlorinated resin in acetal acid.

Description

YU

WITH

a) with the invention relates to methods for the preparation of a ferronyanide sorbent based on polymers and can be used to repeatedly extract cesium from solutions. A known method for producing a ferrocyanide sorbent on a povmer basis, which consists in the fact that the oj chemical base (cation KU-2-8 or KM-2p) is first treated with mineral acid, and then alternately with solutions of copper sulfate and potassium ferrocyascium potassium C. The disadvantage of this method is ergs {; The low sorption capacity of the sorbeweter sorbewt (4.8-12, О mg / g) was due to a small amount (no more than 15 ferrocyanndae of the generic metatype and copper introduced into the resin, as well as the sorbent’s stability. The purpose of the invention This is achieved by processing a mixed alkaline ferrocyanide heavy metal ferrocyanide with a solution of perchporvilovy resin in acetone. Example 1. Mixed ferrocyania Potassium and nickel are obtained by mixing 1M solution of potassium ferrocyanide and 1M solution of nickel sulphate in a volume ratio of 3: 4. 1 g (55%) of mixed ferraanoi-i and potassium and nickel is mixed with 0.8 g (45%) of perchlorovinyl tissue dissolved in acetone. The mixture slowly thickens to take the form of a pasty mass. This mass is pulled into a thread with a diameter of 1-2 mm and cut into pieces 1-2 mm long. The resulting granules are dried for 24 hours at 4 ° C. The capacity of the resulting sorbent is 60.0 mg / g. When the sorbent was kept for 4 months, the geological solution with a total mineralization of 360 g / l did not expel the content of mixed potassium ferrosanide and nickel in the sorbent. Example 2, Analogous to example 1, except for the fact that mixed potassium ferrocyanide and copper are used. The capacity of the sorbent pocesia is 52.2 mg / g. When the obtained sorbent is kept in the technological solution, the content of mixed potassium ferrocyanide and copper in it does not change. The sorbent obtained in a known manner, for example, based on cation exchanger KU-2-8. with the content of mixed ferrocyan a-potassium and copper in the amount of 6% in similar conditions, it loses 0.9% of the corresponding ferrocyanide. Thus, the proposed method allows to obtain a sorbent with a povien sorption capacity and stability, which leads to its economic efficiency.

Claims (1)

METHOD FOR PRODUCING FERROCIANIDE SORBENT ON A POLYMERIC BASIS, including the interaction of a heavy metal salt and an alkali metal ferrocyanide with the formation of a mixed alkali and heavy metal ferrocyanide, characterized by 4TQ s. a chain of increasing sorption capacity and stability of the sorbent, a mixed alkali and heavy metal ferrocyanide is treated with a solution of perchlorovinyl resin in acetone.