BR9803218A - Additive composition and process to reduce the required amounts of anthraquinone in the pulping process of cellulosic material. - Google Patents
Additive composition and process to reduce the required amounts of anthraquinone in the pulping process of cellulosic material.Info
- Publication number
- BR9803218A BR9803218A BR9803218A BR9803218A BR9803218A BR 9803218 A BR9803218 A BR 9803218A BR 9803218 A BR9803218 A BR 9803218A BR 9803218 A BR9803218 A BR 9803218A BR 9803218 A BR9803218 A BR 9803218A
- Authority
- BR
- Brazil
- Prior art keywords
- anthraquinone
- pulp
- additive composition
- reduce
- forming
- Prior art date
Links
Abstract
<B>"COMPOSIçãO ADITIVA E PROCESSO PARA REDUZIR AS QUANTIDADES EXIGIDAS DE ANTRAQUINONA NO PROCESSO DE FORMAçãO DE POLPA DE MATERIAL CELULóSICO"<D>. A presente invenção consiste numa aperfeiçoada composição aditiva e num processo aperfeiçoado para deslignificação de matéria-prima lignicelulósica, tal como cavacos de madeira, para a produção de polpas de celulose, para uso na fabricação de papel ou papelão, em que os cavacos de madeira são tratados em um reator frchado, com um licor alcalino de formação de polpa, com uma quantidade de um composto cíclico de cetona, tal como, antraquinona, incluída para obtenção de um determinado rendimento de polpa, em que o aperfeiçoamento compreende uma redução na quantidade necessária de antraquinona para alcançar o dito rendimento, mediante adição ao dito licor alcalino de fromação de polpa, além de uma reduzida quantidade de antraquinona, de uma mistura tensoativa que compreende pelo menos um alcoxilato de álcool alquílico e pelo menos um éter de polixialquilenoglicol de um éster de um ácido selecionado do grupo que consiste de ácido ricinoleico e ácido 12-hidroxiesteárico.<B> "ADDITIVE COMPOSITION AND PROCESS TO REDUCE THE QUANTITIES REQUIRED OF ANTHRAQUINONE IN THE CELLULOSIC MATERIAL PULP FORMING PROCESS" <D>. The present invention consists of an improved additive composition and an improved process for delignifying lignicellulosic raw material, such as wood chips, for the production of cellulose pulps, for use in the manufacture of paper or cardboard, in which the wood chips are treated in a flaked reactor, with a pulp-forming alkaline liquor, with an amount of a cyclic ketone compound, such as anthraquinone, included to obtain a certain pulp yield, in which the improvement comprises a reduction in the necessary quantity of anthraquinone to achieve said yield, by adding to said alkaline pulp-forming liquor, in addition to a reduced amount of anthraquinone, a surfactant mixture comprising at least one alkyl alcohol alkoxylate and at least one polyalkylene glycol ether of an ester of an acid selected from the group consisting of ricinoleic acid and 12 -hydroxystearic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9803218A BR9803218A (en) | 1998-08-25 | 1998-08-25 | Additive composition and process to reduce the required amounts of anthraquinone in the pulping process of cellulosic material. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9803218A BR9803218A (en) | 1998-08-25 | 1998-08-25 | Additive composition and process to reduce the required amounts of anthraquinone in the pulping process of cellulosic material. |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9803218A true BR9803218A (en) | 2000-03-28 |
Family
ID=4070369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9803218A BR9803218A (en) | 1998-08-25 | 1998-08-25 | Additive composition and process to reduce the required amounts of anthraquinone in the pulping process of cellulosic material. |
Country Status (1)
Country | Link |
---|---|
BR (1) | BR9803218A (en) |
-
1998
- 1998-08-25 BR BR9803218A patent/BR9803218A/en active Search and Examination
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B25A | Requested transfer of rights approved |
Owner name: MEADWESTVACO CORPORATION (US) Free format text: TRANSFERIDO POR INCORPORACAO DE: WESTVACO CORPARATION |
|
B06A | Patent application procedure suspended [chapter 6.1 patent gazette] |