Method for recycling epoxy resins and glass fibre from non-metal powder of waste printed circuit board
A technology for recycling epoxy resin and printed circuit boards, which is applied in plastic recycling, chemical recycling, recycling technology, etc., can solve the problems of limited amount of addition, pollution of resources, occupation of land resources, etc., and achieve full utilization of resources and high recovery rate high effect
Inactive Publication Date: 2009-04-15
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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The invention discloses a method for recycling epoxide resin and glass fiber from non-metal powder in waste printed circuit boards, comprising the following steps of: (1) pretreatment, and dust removal by washing; (2) removing residue metal: inorganic acid is used for removing the residue metal in the non-metal powder, and the obtained powder can be used directly after being filtrated; (3) preliminary decomposition: the processed non-metal powder is added into inorganic acid, the obtained mixture is heated for reaction and then filtrated; the filtrated solid is added into organic solvent, stirred and filtrated and the obtained solid is the glass fiber; and the organic solvent in the filtrate is evaporated so as to obtain the solid epoxide resin; and (4) secondary decomposition: the obtained solid epoxide resin is added into inorganic acid, and heated for reaction; and then the organic solvent is used for extraction and then is evaporated so as to obtain low molecular weight epoxide resin. The invention realizes green recycling of the non-metal powder of the waste printed circuit boards under the moderate condition and has high recovery rate, thus not only being capable of reducing the emission of pollutants but also leading the resource to be fully utilized.
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