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Process for purifying sodium phosphate buffer solution is used for absorption of sulfur dioxide in flue gas.
Process for purifying sodium phosphate buffer solution is used for absorption of sulfur dioxide in flue gas.
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机译：纯化磷酸钠缓冲溶液的方法用于吸收烟道气中的二氧化硫。
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摘要
The present invention describes a procedure for the removal of sodium sulphate from a phosphate solution that has been used for absorption of SOSUB2 /SUBfrom flue gases, in which a precipitate forms when the absorption solution is regenerated by evaporation. In this procedure a part of the precipitate is separated from its solution and treated with water and SOSUB2 /SUBfor transformation of disodium-hydrogen phosphate into monosodium dihydrogen phosphate in the aqueous solution. The sodium sulphate remains undissolved and is removed by filtration. The filtrate is then added back to the main process.
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