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Causticising   The purpose of causticising (Figure 1), is to convert green liquor to white liquor with the help of lime 1. The sulphur compounds in the weak black liquor after pulping were converted mostly to sodium sulphide (Na2S) already in the recovery boiler. The aim in causticisation 1 is to convert the sodium carbonate
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This page has been updated 27.11.2020