You can check on the existing literature, expanded graphite is an excellent adsorbent, in particular, it has porous structure of the organic compound with a strong adsorption capacity, 1 g expanded graphite can adsorb 80 g of oil, so expansion graphite has been designed as an adsorbent various industrial oils and oilseeds industry. Expanded graphite easily adsorbed oils, organic molecules and hydrophobic material, used for water treatment and environmental protection can not be replaced with other substances effect. When it is in granular form for degreasing water, oil, and the size of the water according to the different types of the area of oil, in an amount of 1 ~ lo% / rn, the adsorption time can vary in 15rain to several h.
Compared with other adsorbents, expanded graphite has many advantages. Such as the use of activated carbon for water oil, after which the oil will sink adsorption, adsorption capacity is also small, and difficult to recycle; some adsorbents, such as cotton, kelp, polypropylene fiber, perlite, vermiculite, they suction and also water, which brings difficulties to the post-treatment; adsorption capacity expanded graphite oils, oil absorption after floating on the water, fishing and easy recovery and recycling process is simple and can be extrusion, centrifugation, vibration, solvent cleaning, combustion, heat extraction method, and not a secondary pollution