Surface Chemistry of Deinking Flotation for Improved Wastepaper Recycling

CTS-9215421 犹他州大学 简·D米勒 摘要 本项目的目的是了解废纸回收脱墨浮选过程的表面化学，作为改善空气喷射水力旋流器（ASH）单元在此应用中的性能的基础。 中的重大问题 脱墨浮选，例如在制浆过程中油墨与纤维表面的分离， 氧化，油墨颗粒与纤维的异凝聚，和 将解决由纤维素纤维的缠结引起的油墨颗粒的截留。 在灰浮选的最佳操作条件下，再生纸的产率和白度有望提高。 有重大的激励措施，以增加国内纸张回收的努力。 在美国，多达50%的垃圾填埋场需求来自纸和纸制品。 除了废物处理问题外，纸张回收还可以保护树木、水和能源。

CTS-9215421 University of Utah Jan D. Miller ABSTRACT The objective of this project is to understand the surface chemistry of deinking flotation process for wastepaper recycling as a basis for improving the performance of air-sparged hydrocyclone (ASH) units in this application. Major problems in deinking floatation such as separation of ink from the fiber surface during pulping, differences in hydrophobicity of ink due to oxidation, heterocoagulation of ink particles with fibers, and entrapment of ink particles by entanglement of cellulose fibers will be addressed. Increased yields and greater brightness of recycled paper are expected with optimal operating conditions for ASH flotation. There are significant incentives to increase domestic paper recycling efforts. As much as 50% of the landfill requirement in the United States derives from paper and paper products. Aside from the waste disposal problem, paper recycling will conserve trees, water and energy.