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CELLULOSIC PULP BLEACHING PROCESS USING CHLORINE DIOXIDE AND CHLORINE
CELLULOSIC PULP BLEACHING PROCESS USING CHLORINE DIOXIDE AND CHLORINE
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机译:二氧化氯和氯离子对纤维素纸浆的漂白工艺
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摘要
A high-efficiency wood pulp bleaching process to produce wood pulps with high brightness and with high levels of chlorine substitution. The process comprises reacting chlorine and chlorine dioxide with wood pulp at a pH of about 7-10 for about 5-40 minutes. Next, the remaining chlorine is added and the mixture brought to a pH of 4 or less, where it is allowed to react for 30 or more minutes to complete the two-step high/low pH sequential chlorine addition bleaching process.
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