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Titolo:
AN ECF SEQUENCE FOR THE ALCELL(R) PROCESS INCLUDING AN ETHANOL-ASSISTED OZONE STAGE
Autore:
NI YH; VANHEININGEN ARP;
Indirizzi:
UNIV NEW BRUNSWICK FREDERICTON NB E3B 5A3 CANADA LIMERICK PULP & PAPER RES & EDUC CTR FREDERICTON NB E3B 6C2 CANADA
Titolo Testata:
Tappi journal
fascicolo: 4, volume: 81, anno: 1998,
pagine: 141 - 144
SICI:
0734-1415(1998)81:4<141:AESFTA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Keywords:
BLEACHED PULPS; CHLORINE FREE BLEACHING; COSTS; DELIGNIFICATION; DIFFUSION WASHING; ETHANOL; MULTISTAGE PROCESS; ORGANOSOLV PULPING; OZONE BLEACHING; PHYSICAL PROPERTIES; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
4
Recensione:
Indirizzi per estratti:
Citazione:
Y.H. Ni e A.R.P. Vanheiningen, "AN ECF SEQUENCE FOR THE ALCELL(R) PROCESS INCLUDING AN ETHANOL-ASSISTED OZONE STAGE", Tappi journal, 81(4), 1998, pp. 141-144

Abstract

An elemental chlorin-free (ECF) bleaching a sequence was developed for the ALCELL(R) process. The sequence consists of an efficient washingstage with an ethanol-water mixture to further decrease the residual lignin content, a high-consistency ozone bleaching stage using a pH of2, a 70% w/w ethanol solution for pulp impregnation, a hot ethanol-water extraction stage, and two chlorine dioxide stages for final brightening. This solvent-based bleaching process is compatible with a recently developed ethanol-based solvent pulping technology and shows very limited carbohydrate degradation. We found that the physical and optical properties of the ECF-bleached pulp are similar to or better than those of the corresponding ODED bleached pulp. The advantage over the ODED bleaching sequence is that the use of sodium hydroxide is eliminated to decreased to a level that will be affect the economics or environmental impact of an ethanol-water pulp mill that is operated without a high-capital-cost caustic recovery system.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:57:31