what is range of yield in the semi-chemical process ?
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The four principal processes used in chemical pulping are kraft, sulfite, neutral sulfite semi-chemical (NSSC), and soda. The first three have great potential for causing air pollution. The kraft process alone accounts for over 80% of the chemical pulp produced in the USA.
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Explanation: 60-80% is the yield of the Semi-chemical process. It is because of its two phase expansion process.
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