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________ is the mostly used chemical for bleaching of chemical pulp.

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in Food Packaging Technology by (63.0k points)
________ is the mostly used chemical for bleaching of chemical pulp.

(a) Sodium Hydroxide

(b) Potassium Iodide

(c) Hydrogen Peroxide

(d) Sodium Disulphite

The question was asked in my homework.

Question is taken from Pulping, Digestion and Bleaching topic in division Paper and Paper Based Packaging Materials of Food Packaging Technology

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The correct option is (c) Hydrogen Peroxide

For explanation I would say: Hydrogen Peroxide (H2O2) is the mostly used chemical for bleaching of chemical pulp. The reaction typically requires 3 h at 40°C and is followed by neutralization and destruction of excess peroxide with SO2. Peroxide bleaching allows brightness to be increased by nearly 20%.

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