Project ForgeChemical Technology
Organic Chemical Industries
GATE 2019
Medium
In the Kraft process, the essential chemical reagents used in the digester are
- Acaustic soda, mercaptans and ethylene oxide
- caustic soda, sodium sulphide and soda ash
- Cquick lime, salt cake and dimethyl sulphide
- Dbaking soda, sodium sulphide and mercaptans
Explanation
The Kraft pulping white liquor consists of caustic soda (NaOH), sodium sulphide (Na2S), and soda ash (Na2CO3) as makeup chemical.
Source: GATE CH 2019 (2019)
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