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1. 发明授权

US5262004A Method of extracting chemical preservatives from treated wood 失效
标题翻译：从经处理的木材中提取化学防腐剂的方法
公开(公告)号：US5262004A
公开(公告)日：1993-11-16
申请号：US914546
申请日：1992-07-16
申请人： Roland Gilbert , Andre Besner , Pierre Tetreault
发明人： Roland Gilbert , Andre Besner , Pierre Tetreault
IPC分类号： D21B1/02 , D21B1/36 , D21B1/12
CPC分类号： D21B1/023 , D21B1/021 , D21B1/36
摘要： Preservatives and oil are extracted from treated wood. For this purpose, treated wood that is intended to be discarded is comminuted, the chips are impregnated with an alkaline solution until softening of the chips and modification of the chemical state of the products to be extracted. Possibly, the chips may be treated with saturated steam at a temperature between 170.degree. C. and 210.degree. C. followed by an explosive decompression giving wood fragments. This is followed by a refining operation in a crusher permitting the grinding of the wood. The result is a substantial release of the preservatives and oil from the wood chips which are at least partly disintegrated. The chemical preservatives and the oil are collected separately from the wood chips in the aqueous phases which are produced in the impregnation, steam cooking-explosive decompression and refining steps.
摘要翻译：防腐剂和油从被处理的木材中提取。为此目的，粉碎被处理的待处理木材，用碱性溶液浸渍碎屑直到芯片软化，并改变要提取的产品的化学状态。可能的是，可以在170℃和210℃之间的温度下用饱和蒸汽处理碎屑，然后进行爆炸减压以产生木屑。之后是在允许研磨木材的破碎机中进行精炼操作。结果是从至少部分分解的木片中的防腐剂和油的实质释放。化学防腐剂和油分别从在浸渍，蒸汽烹饪 - 爆炸减压和精炼步骤中生产的水相中的木片中分离收集。

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