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Open Access
The r & t system: everyone is responsible for innovation, TAPPI JOURNAL, September 2000, Vol. 83(9)

The r & t system: everyone is responsible for innovation, TAPPI JOURNAL, September 2000, Vol. 83(9)

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
Magazine articles
TAPPI Journal Summaries, Paper360º January/February 2021

TAPPI Journal Summaries, Paper360º January/February 2021

Journal articles
Magazine articles
TAPPI Journal Summaries,Paper360º July/August 2021

TAPPI Journal Summaries,Paper360º July/August 2021

Magazine articles
Enlisting management advice from the military, Solutions!, March 2003, Vol. 86(3) (67KB)

Enlisting management advice from the military, Solutions!, March 2003, Vol. 86(3) (67KB)

Magazine articles
Building sustainable buildings, Solutions!, March 2003, Vol. 86(3) (68KB)

Building sustainable buildings, Solutions!, March 2003, Vol. 86(3) (68KB)

Magazine articles
People on the move, Solutions!, March 2003, Vol. 86(3) (117KB)

People on the move, Solutions!, March 2003, Vol. 86(3) (117KB)

Magazine articles
Chinaâ??s paper industry: Entering the wto era, Solutions!, March 2003, Vol. 86(3) (471KB)

China’s paper industry: Entering the wto era, Solutions!, March 2003, Vol. 86(3) (471KB)

Magazine articles
Engineered for achievement: Carl Marschke, Solutions!, March 2003, Vol. 86(3) (161KB)

Engineered for achievement: Carl Marschke, Solutions!, March 2003, Vol. 86(3) (161KB)

Magazine articles
TAPPI Honors Sandy Sharp for Distinguished Service, Solutions!, March 2003, Vol. 86(3) (152KB)

TAPPI Honors Sandy Sharp for Distinguished Service, Solutions!, March 2003, Vol. 86(3) (152KB)

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