Chemical wood pulping process with reduced pitch and VOC emissions

A wood pulping process wherein wood particulates are subjected to a solvent extraction process that removes pitch as well as other wood extractives. The wood particulates are then subjected to a pulping process that is virtually free of volatile organic compound emissions. A chemical wood pulping pr...

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Hauptverfasser: Speaks, Jerry R, Campbell, Roger O, Veal, Michael A
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creator Speaks, Jerry R
Campbell, Roger O
Veal, Michael A
description A wood pulping process wherein wood particulates are subjected to a solvent extraction process that removes pitch as well as other wood extractives. The wood particulates are then subjected to a pulping process that is virtually free of volatile organic compound emissions. A chemical wood pulping process having reduced volatile organic compound emissions includes extracting wood particulates with solvent at a pressure less than 50 psi to reduce naturally-occurring particulate pitch and volatile organic compound content without significant dissolution of lignin and wood cellulosic components. The solvent used is methanol, ethanol, or acetone. This is followed by comingling the extracted wood particulates with a liquor having chemical reactants, not including the solvent used to extract the wood particulates, for solubilizing lignin. Then, allowing the chemical reactants of the liquor to react with lignin contained in the extracted wood particulates under controlled conditions of temperature and pressure for a sufficient time to solubilize and remove lignin. This is followed by producing a wood pulp having individual cellulosic fibers while releasing a reduced amount of VOCs in the wood pulping process.
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title Chemical wood pulping process with reduced pitch and VOC emissions
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