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NEET2005BotanyBiodiversity and its ConservationActual

An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the:

Options

  1. Apreparation of pure cellulose by removing lignin
  2. Btreatment of wood with chemicals that break down cellulose
  3. Cremoval of oils present io the wood by treatment with suitable chemicals
  4. Dremoval of water from the wood by prolonged heating at approximately 50^ C .

Correct answer

A. preparation of pure cellulose by removing lignin

Step-by-step solution

Paper production is basically a two-step process in which a fibrous raw material is first converted into pulp, and then the pulp is converted into paper. The harvested wood is first processed so that the fibres are separated from the unusable fraction of the wood, the lignin. Related Theory The pulping process is aimed at removing lignin without loosed fibre strength, thereby freeing the fibres and removing impurities that cause discoloration and possible future disintegration of the paper. Hemicellulose plays an i

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