CHEMICAL RECOVERY PROCESS FOR HIGH SULFIDITY SPENT COOKING LIQUOR
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概要
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A new chemical recovery process for high sulfidity spent liquor has been developed by Mitsubishi Heavy Industries, Ltd. and Jujo Paper Manufacturing Co., Ltd. <BR>In this new recovery process, high sulfidity smelt can be obtained by absorbing SO<SUB>2</SUB> gas in the flue gas in a solution of sodium carbonate solution separated from smelt solution and buring the resulting sodium sulfite solution together with spent liquor. <BR>The sulfidity of smelt can be easily controlled by suitably adjusting the amount of sodium carbonate recycled to the recovery system and the amount of SO<SUB>2</SUB> gas absorbed in the sodium carbonate solution. <BR>This new recovery process can also be applied to the cross recovery for alkaline and sulfite spent liquors.
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