Title:
PROCESS FOR PRODUCING MODIFIED CELLULOSE PULPS, CELLULOSE PULP THUS OBTAINED AND USE OF BIOPOLYMER FOR PRODUCING CELLULOSE PULPS
Document Type and Number:
WIPO Patent Application WO/2011/113126
Kind Code:
A3
Abstract:
The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions used. The biopolymers according to the present invention are starch by an etherification reaction. This treatment results in a differentiated pulp having improved physical, chemical and mechanical properties when compared with cellulose pulps obtained by traditional processes. The use of said biopolymer alters the relations between important pulp properties rendering their application in papermaking process advantageous. This differentiation increases the possibilities of use and also of new applications, including for the substitution of pulps produced from other cellulose sources. Thus, the present invention also relates to a process for the preparation of paper, such as printing, writing, decorative, special or tissue- type papers, through the use of the cellulose pulps modified by the above process.
Inventors:
RANOCCHIA ROMOLO (BR)
MASSOQUETE ADEMILSON (BR)
OYAKAWA DANILO (BR)
MASSOQUETE ADEMILSON (BR)
OYAKAWA DANILO (BR)
Application Number:
PCT/BR2011/000071
Publication Date:
November 17, 2011
Filing Date:
March 21, 2011
Export Citation:
Assignee:
FIBRIA CELULOSE SA (BR)
RANOCCHIA ROMOLO (BR)
MASSOQUETE ADEMILSON (BR)
OYAKAWA DANILO (BR)
RANOCCHIA ROMOLO (BR)
MASSOQUETE ADEMILSON (BR)
OYAKAWA DANILO (BR)
International Classes:
D21C3/22; D21C5/02; D21C9/00; D21C9/10; D21H17/21; D21H17/24; D21H17/28
Domestic Patent References:
| WO2007078247A1 | 2007-07-12 | |||
| WO2004046464A1 | 2004-06-03 |
Foreign References:
| US4927498A | 1990-05-22 | |||
| US4756801A | 1988-07-12 | |||
| EP1080271B1 | 2003-06-18 | |||
| EP0148647A1 | 1985-07-17 |
Attorney, Agent or Firm:
DANNEMANN, SIEMSEN, BIGLER & IPANEMA MOREIRA (Rua Marquês de Olinda 7, Botalfogo -040 Rio de Janeiro - RJ, BR)
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