Deinking of waste paper

Uses Flotation deinking surfactant for wood-free and newsprint paper dispersant-collector for flotation deinking of waste paper Floatsan 210 [BASF]... 

Uses Defoamer for metalworking, textiles, pulp/paper, water treatment, l l cleaners, industrial and mech. dishwash rinse aid for automatic dishwashing and windshield washing lubricant for metalworking flotation collector for deinking and recycling of waste paper Properties Hazen 100 liq. sol. in benzene, ethyl acetate, ethyl Icinol, perchlorethylene, veg. oil, olein sp.gr. 1.017 vise. 388 cps m.p. < 0 C HLB 3 cloud pt. 24 2 C surf. tens. 39.0 dynes/cm pH 6 (1% aq.) nonionic 100 /oact. 

Based on these fundamental results the filler flotation from different types of waste paper was investigated. The flotation experiments were conducted in tap water (286 ppm CaCOj) using the standard deinking formulation. Besides alkali this formulation contain hydrogen peroxide and sodium silicate, which increases the selectivity and has been proven to be a dispersant for fillers [4]. 0.2% of the anionic surfactant or of the cationic polymer was applied. The results are summarized in Fig. 10 and are given as percent ash (filler) content in the flotated pulp. A low ash content means a high recovery of the fillers. 

Uses Defoamer for metalworking, textiles, pulp/paper, water treatment, l l cleaners, industrial and mech. dishwash rinse aid for automatic dishwashing and windshield washing lubricant for metalworking flotation collector for deinking and recycling of waste paper... 

Pulp mills. These separate the fibers of wood or other materials, such as rags, Enters, waste-paper, and straw, in order to create pulp. Mills may use chemical, semichemical, or mechanical processes, and may create coproducts such as turpentine and tall oil. Most pulp mills bleach the pulp they produce, and, when wastepaper is converted into secondary fiber, it is deinked. The output of some pulp mills is not used to make paper, but to produce cellulose acetate or to be dissolved and regenerated in the form of viscose fibers or cellophane. 

This has historically involved only minimal use of chemical additives. The product is usually unsized and, because of its low cost, the use of polyelectrolytes for retention is not usually cost-effective. However, this situation is changing as a result of the trend towards limited filler inclusion and also the increased use of deinked waste paper. Newsprint is usually made in an acidic system due to the naturally low pH of groundwood pulp but, as more recycled fibre is used, the process may eventually become neutral. 

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