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    • 56. 发明申请
    • Methods of Enhancing Fine Particle Dewatering
    • 增强细颗粒脱水的方法
    • US20080053914A1
    • 2008-03-06
    • US11833402
    • 2007-08-03
    • Roe Yoon
    • Roe Yoon
    • B01D21/01C02F1/52
    • B03D1/08C02F1/26C02F11/14C02F2103/10C02F2301/063C10L5/04F26B5/005F26B2200/18
    • A new method of improving the process of dewatering fine particulate materials is disclosed. In this method, an aqueous slurry of fine particles is treated with appropriate hydrophobizing reagents so that the particulate material becomes moderately hydrophobic with its water contact angle considerably below 90°. A low hydrophile-lipophile balance (HLB) number surfactant is then added to the slurry, so that the surfactant molecules adsorb on the moderately hydrophobic surface primarily by hydrophobic attraction and, thereby, increase its contact angle close to or above 90°. By virtue of the greatly enhanced hydrophobicity, the water molecules adhering to the surface are destabilized and removed more readily by a mechanical dewatering process. Any nonionic surfactant with its HLB number below about 15 may be used for the hydrophobicity enhancement. The surfactants may be used in conjunction with appropriate solvents such as light hydrocarbon oils and short-chain alcohols. The moisture reduction can be further improved by using appropriate electrolytes in conjunction with the low HLB surfactants, spraying surface tension lowering reagents onto the filter cake, subjecting the cake to a suitable vibratory means, and by using combinations thereof.
    • 公开了一种改进细颗粒材料脱水工艺的新方法。 在该方法中,用适当的疏水试剂处理细颗粒的含水浆料,使得颗粒物质变得适度疏水,其水接触角显着低于90°。 然后将低亲水亲油平衡(HLB)数表面活性剂加入到浆料中,使得表面活性剂分子主要通过疏水吸引而吸附在中等疏水性表面上,从而增加其接近角接近或高于90°。 由于大大提高的疏水性,粘附在表面上的水分子通过机械脱水工艺更容易地不稳定和去除。 其HLB值低于约15的任何非离子表面活性剂都可用于疏水性增强。 表面活性剂可以与合适的溶剂如轻烃油和短链醇一起使用。 通过使用合适的电解质与低HLB表面活性剂,将表面张力降低试剂喷在滤饼上,使滤饼经受合适的振动装置,并通过使用它们的组合,可以进一步改善水分减少。
    • 59. 发明授权
    • Methods of enhancing fine particle dewatering
    • 增强细粒脱水的方法
    • US06855260B1
    • 2005-02-15
    • US09327266
    • 1999-06-07
    • Roe-Hoan Yoon
    • Roe-Hoan Yoon
    • F26B5/00B01D37/02
    • B03D1/08C02F1/26C02F11/14C02F2103/10C02F2301/063C10L5/04F26B5/005F26B2200/18
    • A new method of improving the process of dewatering fine particulate materials is disclosed. In this method, an aqueous slurry of fine particles is treated with appropriate hydrophobizing reagents so that the particulate material becomes moderately hydrophobic with its water contact angle considerably below 90°. A low hydrophile-lipophile balance (HLB) number surfactant is then added to the slurry, so that the surfactant molecules adsorb on the moderately hydrophobic surface primarily by hydrophobic attraction and, thereby, increase its contact angle close to or above 90°. By virtue of the greatly enhanced hydrophobicity, the water molecules adhering to the surface are destabilized and removed more readily by a mechanical dewatering process. Any nonionic surfactant with its HLB number below about 15 may be used for the hydrophobicity enhancement. The surfactants may be used in conjunction with appropriate solvents such as light hydrocarbon oils and short-chain alcohols. The moisture reduction can be further improved by using appropriate electrolytes in conjunction with the low HLB surfactants, spraying surface tension lowering reagents onto the filter cake, subjecting the cake to a suitable vibratory means, and by using combinations thereof.
    • 公开了一种改进细颗粒材料脱水工艺的新方法。 在该方法中,用适当的疏水试剂处理细颗粒的含水浆料,使得颗粒物质变得适度疏水,其水接触角显着低于90°。 然后将低亲水亲油平衡(HLB)数表面活性剂加入到浆料中,使得表面活性剂分子主要通过疏水吸引而吸附在中等疏水性表面上,从而增加其接近角接近或高于90°。 由于大大提高的疏水性,粘附在表面上的水分子通过机械脱水工艺更容易地不稳定和去除。 其HLB值低于约15的任何非离子表面活性剂都可用于疏水性增强。 表面活性剂可以与合适的溶剂如轻烃油和短链醇一起使用。 通过使用合适的电解质与低HLB表面活性剂,将表面张力降低试剂喷在滤饼上,使滤饼经受合适的振动装置,并通过使用它们的组合,可以进一步改善水分减少。