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Titolo:
FLOCCULANTS FOR PRECIPITATED CALCIUM-CARBONATE IN NEWSPRINT PULPS
Autore:
GIBBS A; XIAO HN; DENG YL; PELTON R;
Indirizzi:
MCMASTER UNIV,DEPT CHEM ENGN,PULP & PAPER RES CTR HAMILTON ON L8S 4L7CANADA MCMASTER UNIV,DEPT CHEM ENGN,PULP & PAPER RES CTR HAMILTON ON L8S 4L7CANADA UMIST,DEPT PAPER SCI MANCHESTER M60 1QD LANCS ENGLAND INST PAPER SCI & TECHNOL,ENGN & PAPER MAT DIV ATLANTA GA 30318
Titolo Testata:
Tappi journal
fascicolo: 4, volume: 80, anno: 1997,
pagine: 163 - 170
SICI:
0734-1415(1997)80:4<163:FFPCIN>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RETENTION AIDS; DEPOSITION; MECHANISMS; FIBERS;
Keywords:
ACRYLAMIDE; BENTONITE; CALCIUM CARBONATE; COPOLYMERS; FLOCCULANTS; MECHANICAL PULPS; NEWSPRINT; POLYACRYLICS; PRECIPITATES; RETENTION; RETENTION AIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
A. Gibbs et al., "FLOCCULANTS FOR PRECIPITATED CALCIUM-CARBONATE IN NEWSPRINT PULPS", Tappi journal, 80(4), 1997, pp. 163-170

Abstract

The retention of precipitated calcium carbonate (PCC) in newsprint pulp (15 wt.% semibleached kraft + 85 wt.% peroxide-bleached mechanical)using polymeric flocculants was investigated. Both commercially available and experimental polymeric flocculants were evaluated, and the combination of cationic polyacrylamide and bentonite was found to be themost effective commercial retention aid. However, the experimental poly(AM/MPEGMA), a copolymer of acrylamide and methoxy poly(ethylene glycol) methacrylate, when used in conjunction with phenolic resin (PFR),was the most effective retention aid. The retention of precipitated calcium carbonate by the PFR/poly(AM/MPEGMA) system was further increased by pretreatment of the pulp furnish with Na2CO3 or by using acid-tolerant PCC instead of conventional PCC. Both Na2CO3-treated pulp and acid-tolerant PCC have lower equilibrium concentrations of Ca++ ions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/10/20 alle ore 04:56:59