ES282306A3 - Procedure for the treatment of wood pulp affiltered in humid (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the treatment of wood pulp affiltered in humid (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES282306A3 ES282306A3 ES282306A ES282306A ES282306A3 ES 282306 A3 ES282306 A3 ES 282306A3 ES 282306 A ES282306 A ES 282306A ES 282306 A ES282306 A ES 282306A ES 282306 A3 ES282306 A3 ES 282306A3
- Authority
- ES
- Spain
- Prior art keywords
- pulp
- maximum brightness
- sodium
- translation
- mass
- Prior art date
- 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.)
- Expired
Links
Landscapes
- Paper (AREA)
Abstract
Process for the treatment of pulp of wood felted in wet, characterized in that it contains appreciable amounts of woody and non-cellulosic materials and has a consistency of not less than 25% solids, and to understand the steps of impregnating the pulp wet felted with an alkaline peroxide solution as the only chemical addition to perform self-controlled pulp bleaching; said alkaline peroxide solution has a ph of 9.5 to 11 and a total alkalinity of 0.35 to 1.1% by weight of sodium oxide equivalent, based on completely dry pulp and comprises a peroxide and a salt alkaline containing as an essential ingredient a sodium salt chosen from the group consisting of sodium silicate, trisodium phosphate, sodium pyrophosphate and sodium tetraphosphate, to accumulate the festered and impregnated pulp, in a mass of appreciable volume and having a relatively small exposed surface, for avoid drying the mentioned mass; to allow said mass to remain in the wet felted condition for from 5 hours to several weeks, in the course of the initial period, time in which the maximum brightness of the pulp is achieved, and the ph thereof is automatically reduced to at least, at the point of maximum brightness, and omitting any further chemical addition to the bleached pulp, to inhibit the color reversion therein after obtaining said maximum brightness; bleached pulp retains virtually its maximum brightness for a period of several weeks at least. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES282306A ES282306A3 (en) | 1962-11-09 | 1962-11-09 | Procedure for the treatment of wood pulp affiltered in humid (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES282306A ES282306A3 (en) | 1962-11-09 | 1962-11-09 | Procedure for the treatment of wood pulp affiltered in humid (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES282306A3 true ES282306A3 (en) | 1963-02-16 |
Family
ID=69466951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES282306A Expired ES282306A3 (en) | 1962-11-09 | 1962-11-09 | Procedure for the treatment of wood pulp affiltered in humid (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES282306A3 (en) |
-
1962
- 1962-11-09 ES ES282306A patent/ES282306A3/en not_active Expired
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