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Journal articles
Magazine articles
Open Access
Continuous tannin extraction by use of screw reactor, TAPPI Journal February 2021

ABSTRACT: A pilot-size screw reactor (extraction unit) was used for tannin extraction of spruce. Yield of the same magnitude or better was obtained when comparing a screw reactor with batch reactors. A longer presoaking time in water seemed to be better than a short one for obtaining higher yield. A higher yield is obtained with lower dry-water ratio, which suggests that the internal diffusion in bark does not determine mass transfer as much as is the case without presoaking of bark. The higher dry-water ratio decreased the yield. The prior soaking of the bark also minimized the mechanical reactor feeding problems (clogging). The benefits of a screw reactor likely are that run time changes for different process conditions are flexible; it simplifies design and construction of an industrial unit for tannin production; and it saves space because of the need for fewer and smaller intermediate storage tanks.

Journal articles
Open Access
Behavior of steel core in the unwinding process, TAPPI JOURNAL, October 1992, Vol. 75(10)

Behavior of steel core in the unwinding process, TAPPI JOURNAL, October 1992, Vol. 75(10)

Journal articles
Open Access
Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)

Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)

Journal articles
Open Access
Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)

Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)

Journal articles
Open Access
Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)

Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)

Magazine articles
Open Access
Beauty or the beast: life after iso 9000, TAPPI JOURNAL, October 1994, Vol. 77(10)

Beauty or the beast: life after iso 9000, TAPPI JOURNAL, October 1994, Vol. 77(10)

Journal articles
Open Access
The impact of web oven parameters on 20 degrees print gloss, TAPPI JOURNAL, October 1994, Vol. 77(10)

The impact of web oven parameters on 20 degrees print gloss, TAPPI JOURNAL, October 1994, Vol. 77(10)

Journal articles
Open Access
Bleached fiber from occ, TAPPI JOURNAL, September 1994, Vol. 77(9)

Bleached fiber from occ, TAPPI JOURNAL, September 1994, Vol. 77(9)

Journal articles
Open Access
Stability and chemical resistance of forming fabrics to wet-end boilout conditions, TAPPI JOURNAL, April 1995, Vol. 78(4)

Stability and chemical resistance of forming fabrics to wet-end boilout conditions, TAPPI JOURNAL, April 1995, Vol. 78(4)

Journal articles
Open Access
A survey of the use of ozone in bleaching pulps, part 1, TAPPI JOURNAL, January 1992, Vol. 75(1)

A survey of the use of ozone in bleaching pulps, part 1, TAPPI JOURNAL, January 1992, Vol. 75(1)

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