ES282300A3 - Procedure for the manufacture of ultrablanqued fiber for paper (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the manufacture of ultrablanqued fiber for paper (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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FMC Corp
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FMC Corp
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Priority to ES282300ApriorityCriticalpatent/ES282300A3/en
Publication of ES282300A3publicationCriticalpatent/ES282300A3/en
Process for manufacturing ultra-white fiber for paper, characterized by starting from chemically purified fiber, selected from the class consisting of sulfate fiber and sulfite fiber, and by comprising previously bleaching the chemically purified fiber, with hypochlorite, to a gloss above 65, and then complete the bleaching of the chemically purified fibers previously bleached with hypochlorite, at a practically constant density of pulp, not less than 30% and at temperatures below 54º c, with alkaline peroxide whose alkalinity is 0.3 % to 3.25%, calculated at the naoh state, being the time of obtaining the maximum brightness, from 1 to 20 days, by which means the physical properties of the fibers thus treated at the maximum brightness level, remain practically unchanged with respect to to the existing ones in the lower level of brightness. (Machine-translation by Google Translate, not legally binding)
ES282300A1962-11-091962-11-09Procedure for the manufacture of ultrablanqued fiber for paper (Machine-translation by Google Translate, not legally binding)
ExpiredES282300A3
(en)
A continuous procedure for the purga, desencolado and whitening of cotton, by chemicals, oxidizers and vaporization (Machine-translation by Google Translate, not legally binding)