METHOD FOR CLEANING SURFACES CONTAMINATED BY CRUDE OIL OR PETROLEUM PRODUCT SPILLS, SORBANT FOR CLEANING SURFACES AND METHOD FOR PRODUCING THE SAME

摘要

This invention relates to a method for cleaning various surfaces such as water surfaces or dry land contaminated by crude oil or petroleum product spills, wherein said method comprises performing a treatment using a composite sorbant that consists of a hydrophobic aluminosilicate material. This sorbant uses as aluminosilicate material the waste produced when burning coal powder in industrial kiln equipment followed by slag-tap removal, while hydrocarbon-containing waste from the oil and wood chemical-processing industries is used as hydrophobising agent, the weight ratio of the above-mentioned wastes being 1:0.001 - 0.25. The method for producing this sorbant comprises treating the aluminosilicate material with an aqueous emulsion or solution of a hydrophobising agent with a weight proportion of aluminosilicate material, water and hydrophobising agent of 1:1 - 5:0.001 - 0.25 respectively. These elements are mixed for 30 minutes at a temperature of between 80 and 85 DEG C (40 to 96 DEG C) and further dried at a temperature of between 105 and 120 DEG C until a constant weight is obtained. After cleaning surfaces, the sorbant used may be regenerated by mixing it with a 1 to 25 % ammonia solution at a temperature of between 20 and 90 DEG C. The aluminosilicate material floating back to the surface is then recovered for second use. The use of the cheap sorbant of the present invention allows for a 99 % cleaning of water surfaces with a capacity ranging from 1 to 10 g of petroleum products for 1 g of sorbant.