BR0101850A - Method to treat pulp - Google Patents
Method to treat pulpInfo
- Publication number
- BR0101850A BR0101850A BR0101850A BR0101850A BR0101850A BR 0101850 A BR0101850 A BR 0101850A BR 0101850 A BR0101850 A BR 0101850A BR 0101850 A BR0101850 A BR 0101850A BR 0101850 A BR0101850 A BR 0101850A
- Authority
- BR
- Brazil
- Prior art keywords
- pulp
- chlorine
- ozone
- bleaching
- oxygen
- Prior art date
Links
Landscapes
- Paper (AREA)
Abstract
"MéTODO PARA TRATAR POLPA". A presente invençãorefere-se a um método para tratar polpa. Especialmente, ainvenção refere-se a um método para branquear polpa, que utilizadióxido de cloro e ozónio, sendo que o propósito do método érecuperar o oxigênio que atua como gás transportador para oozónio, com relação ao branqueamento com oxigênio. Nosmétodos das técnicas anteriores isto não era sempre possível noscasos em que cloro e dióxido de cloro eram usados além doozónio. Uma característica do método, de acordo com a presenteinvenção, é que a polpa é lavada ou diluída em um aparelholavador (16) com água ou filtrado que não contém quantidadessignificativas de cloro ativo, de tal modo que a mistura de polpa eágua depois da lavagem e/ou diluição contenha menos do que 50miligramas de cloro ativo por litro e que a polpa é descarregada doestágio de ozónio para a separação de gases, antes de misturardióxido de cloro na polpa."METHOD FOR TREATING PULP". The present invention relates to a method for treating pulp. In particular, the invention refers to a method for bleaching pulp, which uses chlorine and ozone oxide, the purpose of which is to recover the oxygen that acts as a carrier gas for oozonium, in relation to bleaching with oxygen. In the prior art methods this was not always possible in cases where chlorine and chlorine dioxide were used in addition to ozone. A characteristic of the method, according to the present invention, is that the pulp is washed or diluted in a washing apparatus (16) with water or filtrate that does not contain significant amounts of active chlorine, so that the mixture of pulp and water after washing and / or dilution contains less than 50 milligrams of active chlorine per liter and that the pulp is discharged from the ozone stage for gas separation before mixing chlorine dioxide in the pulp.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20001096A FI122840B (en) | 2000-05-10 | 2000-05-10 | Procedure for treating pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| BR0101850A true BR0101850A (en) | 2001-12-18 |
| BR0101850B1 BR0101850B1 (en) | 2009-08-11 |
Family
ID=8558359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR0101850A BR0101850B1 (en) | 2000-05-10 | 2001-05-10 | method for treating pulp. |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4309025B2 (en) |
| BR (1) | BR0101850B1 (en) |
| FI (1) | FI122840B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4875288B2 (en) * | 2003-12-24 | 2012-02-15 | 三菱瓦斯化学株式会社 | Method for ozone bleaching lignocellulose pulp |
| FI129759B (en) * | 2018-11-30 | 2022-08-15 | Andritz Oy | Arrangement and method for degassing a pump |
-
2000
- 2000-05-10 FI FI20001096A patent/FI122840B/en not_active IP Right Cessation
- 2000-06-07 JP JP2000170456A patent/JP4309025B2/en not_active Expired - Lifetime
-
2001
- 2001-05-10 BR BR0101850A patent/BR0101850B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI122840B (en) | 2012-07-31 |
| JP2001316993A (en) | 2001-11-16 |
| JP4309025B2 (en) | 2009-08-05 |
| FI20001096A (en) | 2001-11-11 |
| BR0101850B1 (en) | 2009-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B25F | Entry of change of name and/or headquarter and transfer of application, patent and certif. of addition of invention: change of name on requirement | ||
| B25L | Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled | ||
| B25D | Requested change of name of applicant approved |
Owner name: ANDRITZ OY (FI) Free format text: ALTERADO DE: ANDRITZ AHLSTROM OY |
|
| B25G | Requested change of headquarter approved |
Owner name: ANDRITZ OY (FI) Free format text: ALTERADA A SEDE DO TITULAR CONFORME SOLICITADO NA PETICAO NO 052829/RJ DE 25/09/2002. |
|
| B09A | Decision: intention to grant [chapter 9.1 patent gazette] | ||
| B16A | Patent or certificate of addition of invention granted |
Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/05/2001, OBSERVADAS AS CONDICOES LEGAIS. |
|
| B21A | Expiry acc. art. 78, item i of ipl- expiry of the term of protection |
Free format text: PATENTE EXTINTA EM 10.05.2021 |