Method for collecting floating oil on water surface
A technology for oil slicks and oil slicks on water surfaces, applied in separation methods, grease/oily substances/suspton removal devices, liquid separation, etc., can solve the problems of low oil slick collection efficiency and unsuitable for large-scale oil slick collection, and achieve The effect of improving oil slick collection efficiency
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[0071] Preparation of dearomatized petroleum ether: use column chromatography to combine 60-100 mesh coarse-pored microsphere silica gel and 70-120 mesh neutral chromatography alumina (activated at 150-160°C for 4 hours), and pack it before cooling completely Into a glass column with an inner diameter of 25mm and a height of 750mm. The lower layer of silica gel is 600mm high and covered with 50mm thick alumina. Commercially available petroleum ether (60-90°C fraction) is passed through this column to remove aromatics. Collect petroleum ether in a narrow-necked bottle, use water as a reference at 225nm on the UV spectrophotometer, and measure the treated petroleum ether so that its transmittance should not be less than 80%.
[0072] Standard curve drawing
[0073] To 7 50mL volumetric flasks, add 0, 2.00, 4.00, 8.00, 12.00, 20.00 and 25.00mL of standard oil use solution, and dilute to the mark with petroleum ether (60-90℃). On an ultraviolet spectrophotometer, at 254nm, use a 1 cm...
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[0078] Preparation Example 1
[0079] This example is used to illustrate the preparation of coated silica sand coated with a lipophilic and hydrophobic film on the surface provided by the present invention.
[0080] Heat 3kg of quartz sand particles (with a density of 1.65 g / cm3) with an average particle diameter of 0.4mm to 250°C and put them in a sand mixer to stir, then cool to 200°C and add polyamide resin modified epoxy resin 0.15kg, fully stir to make the resin evenly distributed on the outer surface of the quartz sand particles, then add aliphatic amine curing agent (the weight ratio of the curing agent to the resin is 2:100) to solidify, and finally cool to room temperature and break to obtain a film Silica sand (with a coating thickness of 1-2 microns). The sphericity of the obtained coated silica sand is 0.72, and the particle diameter distribution is 320-450 microns.
Example
[0081] Preparation Example 2
[0082] This example is used to illustrate the preparation of coated silica sand coated with a lipophilic and hydrophobic film on the surface provided by the present invention.
[0083] The coated particles were prepared according to the same method as Preparation Example 1, except that the phthalate plasticizer was added before adding the curing agent, and the weight ratio of the phthalate plasticizer to the resin was 10:100, and the mixture was fully stirred to obtain The coating thickness of the coated silica sand is 2-3 microns, the sphericity is 0.75, and the particle diameter distribution is 350-430 microns.
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