Shaving board waste recycling method
A particleboard and waste technology, applied in the field of particleboard waste recycling, can solve the problems of reducing waste utilization rate, environmental pollution, etc., achieving huge economic value and social significance, reducing recycling costs, and increasing strength.
Inactive Publication Date: 2013-06-19
SHANGHAI QIBAO HIGH SCHOOL
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Problems solved by technology
In this way, it not only reduces the utilization rate of waste materials, but also causes certain pollution to the environment.
Method used
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[0019] The method for recycling particleboard waste, the specific steps include:
[0020] Step 1: Break up the waste particle board, weigh 4.476 grams of particle board powder, put it in a conical flask, add 50ml of alcohol, seal it with a plastic wrap, put it in a constant temperature shaker, control the temperature at 40°C, and place it for 12 hours;
[0021] Step 2: Filter the filtrate from the solution obtained in step 1, and evaporate the alcohol through a rotary evaporator (reduced pressure under the action of a vacuum pump) at 80°C to obtain a phenolic resin solution and 47ml of alcohol, which can be recycled;
[0022] Step 3: The filter residue after filtering the solution obtained in step 1 is immersed in a mixed solution of 40ml of sodium hydroxide with a mass fraction of 12% and urea with a mass fraction of 8%, and is placed in a constant temperature shaker, and the temperature is controlled at -10°C. Leave for 12 hours;
[0023] Step 4: filter the solution obtaine...
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The invention discloses a shaving board waste recycling method which comprises the following steps: smashing a waste shaving board, adding alcohol in the smashed waste shaving boards to obtain solution, keeping the temperature to be 35-45 DEG C, and standing for 10-15 hours; performing reduced pressure distillation on filtrate obtained by filtering the solution, so as to obtain phenolic resin, wherein the distillate is alcohol; immersing the filter residue obtained after the solution is filtered in a mixed solution of sodium hydroxide and urea, keeping the temperature to be 20 below zero to 10 below zero DEG C, and standing for 10-15 hours; filtering the solution, wherein filter residue is lignin; performing freeze drying on filtrate obtained after the solution is filtered, so as to obtain a freeze-drying product; dissolving the freeze-drying product into a high polymer solution by using water, removing impurities, heating the solution until cellulose is separated out; and filtering the cellulose, wherein the filtrate is the solution of sodium hydroxide and urea. The recycling method is easy to operate, the recycling cost can be reduced, and huge economic values and social significance can be generated.
Description
technical field [0001] The invention relates to a method for recycling particleboard waste. Background technique [0002] Particleboard is a man-made board made by cutting wood and other raw materials into pieces of certain specifications, drying them, mixing them with adhesives, and pressing them at a certain temperature. The disadvantage is that the glue layer will age, the long-term bearing capacity is poor, and the service life is much shorter than that of sawn timber. The total amount of urban waste produced in my country exceeds 6 billion tons every year, and the waste of various wood products mainly waste furniture accounts for about 1% of it, which is equivalent to 60 million tons, about 85 million cubic meters. If it can be effectively utilization, will be a considerable figure. For a long time, my country has seldom recycled waste wood materials, mainly waste furniture, and most of them were incinerated or landfilled together with other wastes. In this way, it no...
Claims
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IPC IPC(8): B09B5/00B09B3/00
CPCY02W30/82
Inventor 黎良枝马诗雨
Owner SHANGHAI QIBAO HIGH SCHOOL