Oil absorbent and oil absorbent manufacturing method
A technology of oil separation and inorganic particles, which is applied in chemical instruments and methods, adsorption water/sewage treatment, centrifugal separation water/sewage treatment, etc. It can solve the problems of reduced strength of oil adsorption materials, poor workability, and labor-intensive separation. Achieve high oil absorption and high strength
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Embodiment 1
[0059] Polystyrene (G590; manufactured by Japan Polystyrene Co., Ltd., density 1.05g / cm 3 ) 6 parts by weight are dissolved in the tetrahydrofuran of 300ml to make a solution, and the average particle diameter is 40 parts by weight of octahedral iron ferric oxide particles of 1000nm (density 5.0g / cm 3 , specific surface area 3.0m 2 / g) was dispersed in the solution to obtain a composition.
[0060] This composition was sprayed at 100° C. using a small spray dryer (B-290 type; manufactured by Shibata Scientific Co., Ltd.) to produce spherical resin composites with an average secondary particle diameter of about 20 μm, ie, oil adsorption particles.
[0061] As a result of SEM observation, the oil adsorbed particles were porous. The SEM photograph of the cross section of the oil-adsorbed particles was taken, binarized, and the particle density was obtained. As a result, the particle area was 60%, and particles with gaps in the middle and particle density differences were obtain...
Embodiment 2～5
[0065] Samples were produced in the same manner as in Example 1 except that the amount of resin (content rate of inorganic particles) was changed. The results are shown in Table 1. When the amount of resin decreases (the content of inorganic particles increases), the number of particles in the direction of the cross section decreases, and voids tend to appear. The less the amount of resin, the better the oil absorption rate.
Embodiment 6～8
[0071] Samples were prepared in the same manner as in Example 1 except that the spray temperature was changed. The results are shown in Table 1. When the temperature is raised, the density of the inorganic particles in the cross-section of the composition is inclined. When the spray temperature is above 120°C (boiling point +63.5°C), about half of them are hollow particles, and when the spray temperature is 140°C, about 70% are hollow particles. hollow particles. The oil adsorption rate was higher than that of samples prepared at lower temperature.
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