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    • 1. 发明授权
    • Magnetic deinking of waste papers
    • 废纸的脱墨
    • US5851349A
    • 1998-12-22
    • US922883
    • 1997-09-03
    • Nipun MarwahG. Frederick Hutter
    • Nipun MarwahG. Frederick Hutter
    • D21B1/32D21C5/02D21D5/00
    • D21B1/325D21C5/025D21D5/00D21D5/005Y02W30/646Y02W30/648
    • An improved process is disclosed for deinking waste paper which contains nonimpact printed papers printed with xerographic and laser inks by repulping the waste paper to form a slurry in the presence of an agglomeration agent and magnetite and subjecting the slurry to a magnetic field to remove the agglomerated ink particles, whereby the improvement comprises replacement of a portion of the agglomeration agent with a copolymer of styrene and acrylic monomers which copolymer is further characterized by having a Ring and Ball softening point of 70.degree.-105.degree. C. and an number average molecular weight of 2,000 to 10,000. The magnetic treatment preferably is conducted at ambient or greater temperature, at neutral to alkaline pH, and at a low pulp consistency. Also, the process may be employed as an additional step in a conventional process for removing inks from reprographic printed papers, such as ink removal by screening, flotation, centrifugal cleaning, washing, and sedimentation with or without decantation.
    • 公开了一种改进的方法,其用于通过在附聚剂和磁铁矿的存在下重新调整废纸以形成浆料并使浆料经磁场去除聚集的废纸,其中包含用静电印刷和激光墨水印刷的非印刷印刷纸的废纸脱墨 油墨颗粒,其改进包括用苯乙烯和丙烯酸单体的共聚物代替一部分附聚剂,该共聚物的进一步特征在于环球软化点为70-105℃,数均分子量 2,000到10,000。 磁性处理优选在环境温度或更高的温度,中性至碱性pH和低浆浓度下进行。 此外,该方法可以用作用于从复印印刷纸上去除油墨的常规方法中的附加步骤,例如通过筛选,浮选,离心清洗,洗涤和有或没有倾析的沉淀来除油。
    • 5. 发明授权
    • Magnetic removal of
    • 从废纸中去除“粘性物质”
    • US5639346A
    • 1997-06-17
    • US447240
    • 1995-05-22
    • Nipun MarwahAllen A. Gold
    • Nipun MarwahAllen A. Gold
    • D21B1/32D21C5/02D21D5/00
    • D21C5/025D21B1/325D21C5/02D21D5/00D21D5/005Y02W30/646Y02W30/648
    • An improved process is disclosed for removing "stickies" from waste paper which contains hot-melt and pressure-sensitive adhesives and lattices to produce high quality (high brightness, little to no dirt content) pulp with little or no fiber loss. The process involves attachment of sticky particles in the waste paper pulp to a magnetic carrier material with the help of an agglomeration agent followed by removal of the attached sticky particles by magnetic separation. The magnetic treatment preferably is conducted at ambient or greater temperature, at neutral to alkaline pH, and at a low pulp consistency. Agglomeration and magnetite addition, followed by exposure of the repulped waste paper to a magnetic field provides near complete sticky removal over exposure to the magnetic field without such pre-treatment.
    • 公开了一种改进的方法,用于从包含热熔和压敏粘合剂和网格的废纸中去除“粘性物质”,以产生很少或没有纤维损失的高品质(高亮度,少至无污垢)的纸浆。 该方法包括借助于附聚剂将废纸浆中的粘性颗粒附着到磁性载体材料,然后通过磁分离除去所附着的粘性颗粒。 磁性处理优选在环境温度或更高的温度,中性至碱性pH和低浆浓度下进行。 聚集和磁铁矿的添加,随后将再生废纸暴露于磁场,在暴露于磁场的情况下提供接近完全的粘性去除,而无需这种预处理。
    • 7. 发明授权
    • Magnetic deinking of waste papers
    • 废纸的脱墨
    • US5527426A
    • 1996-06-18
    • US238478
    • 1994-05-05
    • Nipun MarwahAllen A. Gold
    • Nipun MarwahAllen A. Gold
    • B03C1/00D21B1/32D21C20060101D21C5/02D21D5/00
    • D21B1/325D21C5/02D21C5/025D21D5/00D21D5/005Y02W30/646Y02W30/648
    • An improved process is disclosed for deinking waste paper which contains laser, electrostatic, and other non-impact printing toners/inks to produce high quality (high brightness, little to no dirt content) pulp with little or no fiber loss. The process involves attachment of ink particles in the waste paper pulp to a magnetic carrier material with the help of an agglomeration agent followed by removal of the attached ink particles by magnetic separation. The magnetic treatment preferably is conducted at ambient or greater temperature, at neutral to alkaline pH, and at a low pulp consistency. Agglomeration and magnetite addition, followed by exposure of the repulped waste paper to a magnetic field provides near complete ink removal over exposure to the magnetic field without such pretreatment. Also, the process may be employed as an additional step in a conventional process for removing inks from reprographic printed papers, such as ink removal by screening, flotation, centrifugal cleaning, washing, and sedimentation with or without decantation.
    • 公开了一种改进的方法,用于将含有激光,静电和其它非冲击性印刷调色剂/油墨的废纸脱墨以产生很少或没有纤维损失的高品质(高亮度,少至无污垢)纸浆。 该方法包括借助于附聚剂将废纸浆中的墨颗粒附着到磁性载体材料,然后通过磁分离除去附着的墨颗粒。 磁性处理优选在环境温度或更高的温度,中性至碱性pH和低浆浓度下进行。 聚集和磁铁矿添加,随后将再生废纸暴露于磁场,在不进行这种预处理的情况下,在暴露于磁场的情况下提供接近完全的油墨去除。 此外,该方法可以用作用于从复印印刷纸上去除油墨的常规方法中的附加步骤,例如通过筛选,浮选,离心清洗,洗涤和有或没有倾析的沉淀来除油。