Difference between revisions of "Additional information: Bleaching of flax"
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Revision as of 13:20, 10 November 2010
Back to Bleaching of flax
1. DESCRIPTION OF TECHNIQUES, METHODS AND EQUIPMENT
Flax contains 25-30 % more non-cellulose matter than cotton. Therefore complicated processes are needed to achieve full-white.
- possible processes
- 1.) pre-bleaching at pH 11.5 in bath
- 2.) addition of sodium chlorite at pH 5.5 and 65°C to bath
- widely used
- 4-step process:
- 1.) alkaline cooking
- 2.) alkaline bleaching with hypochlorite
- 3.) chlorite bleaching
- 4.) peroxide bleaching
- LOK-process (Degussa)
- 1.) sodium chlorite bleaching
- 2.) H2O2 bleaching
- Ravensburger process
- 1.) broth
- 2.) bleaching with aqueous chlorine dioxide-solution
- 3.) H2O2 bleaching
- 4.) hypochlorite bleaching
2. NEW TECHNOLOGIES'
- a) Changes in the process
No information is available.
- b) Changes in the heat supply system
No information is available.
- c) Changes in the energy distribution system
No information is available.
Back to Bleaching of flax
