SGS-Polymers (Application fields)
Removal of Arsenic from Wash Solutions
of the Sulphuric Acid Production




 
 


 
 


Removal of Arsenic from Wash Solutions of the Sulphuric Acid Production


Wash solutions from the production of sulphuric acid contain up to 500 g/l sulphuric acid and 2 to 4 g/l arsenic. The removal of arsenic from this extremely toxic and aggressive waste water is an important problem, for which up to now any technical solution did not exist.

This problem could be solved by using SGS-type 11. Part of its structure is a functional group, which forms arsenic complexes in a strong acidic solution.

A procedure basing on the application of SGS-type 11 was developed. Tests under industrial conditions were successful. The concentration of arsenic can be reduced to less than 4 mg/l. Water is used for the regeneration of SGS-11. Throughputs of 800 - 1000 bed volumes per hour are possible in both sorption and regeneration process.

In the same way it is possible to remove antimony from strong acid electrolyte solutions.
 
 

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October 2001
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