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Title: Development of a novel and environmentally friendly method for the separation of non-inked and inked cellulose fibers in wastepaper

Abstract

There is currently no method in existence for the separation of non-inked cellulose fibers from the inked fibers in old newsprint (ONP). Current methods for de-inking involve the pulping of the whole paper in the presence of chemicals (caustic sodium hydroxide, diethylenetriaminepentaacetic acid, sodium silicate, hydrogen peroxide, and a surfactant) followed by washing and flotation operations. The result is a mixture of high- and low-quality de-inked secondary fibers and the production of wastewater that has to be rendered harmless prior to its discharge back to the environment. Water-based inks are a particular problem because of the difficulties in recovering the ink particles after their release from ONP by chemical treatment. Currently, only 15 to 20% of the newsprint market in the USA uses water-based inks. The use of such inks is, however, preferable from an environmental point of view. The work reported here solves several problems: (1) a separation of non-inked from inked cellulose fibers in ONP has been accomplished without the use of de-inking chemicals; (2) the ink is not released to any great extent from the inked fibers; (3) the non-inked fibers contain substantial quantities of long fibers ranging from 1 to 3.5 mm and, as such, aremore » judged to be high-quality secondary fibers that could be recycled without further chemical treatment; and (4) the method is suitable for separating the non-inked and inked fibers in ONP utilizing water- and oil-based inks.« less

Authors:
; ;  [1]; ;  [2]
  1. Oak Ridge National Lab., TN (United States)
  2. Pulp and Paper Research Inst. of Canada, Vancouver, BC (Canada)
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10191813
Report Number(s):
CONF-9309235-1
ON: DE93040605
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Conference
Resource Relation:
Conference: 9. international biodeterioration and biodegradation symposium,Leeds (United Kingdom),5-10 Sep 1993; Other Information: PBD: [1993]
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER; RECYCLING; PAPER INDUSTRY; WASTE MANAGEMENT; SEPARATION PROCESSES; CELLULOSE; INKS; WASTE WATER; FIBERS; 320303; 320305; EQUIPMENT AND PROCESSES; INDUSTRIAL WASTE MANAGEMENT

Citation Formats

Woodward, J, Koran, Jr, L J, Stephan, L M, Wong, K K.Y., and Saddler, J H. Development of a novel and environmentally friendly method for the separation of non-inked and inked cellulose fibers in wastepaper. United States: N. p., 1993. Web.
Woodward, J, Koran, Jr, L J, Stephan, L M, Wong, K K.Y., & Saddler, J H. Development of a novel and environmentally friendly method for the separation of non-inked and inked cellulose fibers in wastepaper. United States.
Woodward, J, Koran, Jr, L J, Stephan, L M, Wong, K K.Y., and Saddler, J H. Wed . "Development of a novel and environmentally friendly method for the separation of non-inked and inked cellulose fibers in wastepaper". United States. https://www.osti.gov/servlets/purl/10191813.
@article{osti_10191813,
title = {Development of a novel and environmentally friendly method for the separation of non-inked and inked cellulose fibers in wastepaper},
author = {Woodward, J and Koran, Jr, L J and Stephan, L M and Wong, K K.Y. and Saddler, J H},
abstractNote = {There is currently no method in existence for the separation of non-inked cellulose fibers from the inked fibers in old newsprint (ONP). Current methods for de-inking involve the pulping of the whole paper in the presence of chemicals (caustic sodium hydroxide, diethylenetriaminepentaacetic acid, sodium silicate, hydrogen peroxide, and a surfactant) followed by washing and flotation operations. The result is a mixture of high- and low-quality de-inked secondary fibers and the production of wastewater that has to be rendered harmless prior to its discharge back to the environment. Water-based inks are a particular problem because of the difficulties in recovering the ink particles after their release from ONP by chemical treatment. Currently, only 15 to 20% of the newsprint market in the USA uses water-based inks. The use of such inks is, however, preferable from an environmental point of view. The work reported here solves several problems: (1) a separation of non-inked from inked cellulose fibers in ONP has been accomplished without the use of de-inking chemicals; (2) the ink is not released to any great extent from the inked fibers; (3) the non-inked fibers contain substantial quantities of long fibers ranging from 1 to 3.5 mm and, as such, are judged to be high-quality secondary fibers that could be recycled without further chemical treatment; and (4) the method is suitable for separating the non-inked and inked fibers in ONP utilizing water- and oil-based inks.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {9}
}

Conference:
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