Waste paper deinking and magnesium base hydrogen peroxide bleaching method
A base hydrogen peroxide, waste paper deinking technology, applied in pulp bleaching, pulp beating method, processing waste paper and other directions, can solve the problems of poor deinking effect of waste paper, high initial alkalinity, difficulty in deinking, etc. Achieve the effect of reducing ink residual concentration, good whiteness stability and enhancing flotation efficiency
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Embodiment 1
[0030] Embodiment 1 waste paper deinking and magnesium base hydrogen peroxide bleaching method
[0031] figure 1 It is a schematic process flow diagram of the waste paper deinking and magnesium base hydrogen peroxide bleaching method of the present invention. Such as figure 1 As shown, it specifically includes the following steps:
[0032] 1. Preparation of waste paper pulp raw materials: take 200g of old newspapers, cut them into 30mm×30mm pieces of paper, put them in a vat, pour 5L of distilled water and soak them for 24 hours, then stop soaking, and then use a centrifuge to dehydrate until the water content is 32%. , after dehydration, put the absolutely dry waste paper raw materials into a sealed bag for later use;
[0033] 2. Pretreatment of surfactant: Weigh 100g of absolute dry waste paper raw material, add 2L of 40°C water to dilute the waste paper raw material to a concentration of 50g / L, turn on the mixer for stirring; when the stirring starts, add a mass of 0.12 ...
Embodiment 2
[0039] The difference from Example 1 is that the mass of the acrylic acid monomer added in step 2 is 0.1 g, and the mass of the isophorone diisocyanate added is 0.1 g.
Embodiment 3
[0041] The difference from Example 1 is that the mass of the acrylic acid monomer added in step 2 is 0.14 g, and the mass of the isophorone diisocyanate added is 0.08 g.
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