英语演讲与辩论
专利名称：Flotation of deep mined coal with water-in-oil emulsions of sodium polyacrylate
slammed>北京中加学校地址发明人：Robert E. Finch
申请号：US05/870559
gets申请日：19780119
公开号：US04162966A
公开日：
双语电影
少儿英语英孚19790731
专利内容由知识产权出版社提供
摘要：A method and treating agent for increasing the yield of deep mined coal mined from a site 100 feet or more below the surface where the particles in the coal are concentrated by froth flotation. This method consists of utilizing as a promoter or frothing aid about 0.05-1.5 lbs of sodium polyacrylate latex per ton of dry coal (0.017-0.5 lb of dry sodium polyacrylate per ton of dry coal), having an average molecular weight of about 100,000 to 1,000,000 and more, with a preferred range of 1,000,000 or more.
The preferred promoter or frothing aid for deep mined coal is a water-in-oil latex of sodium polyacrylate preferably ud with an alcohol-type frother. The latex may be utilized neat and lf inverts with the assistance of an oil-in-water surfactant (or activator) and the water in the system upon application to form an oil-in-water emulsion, or it may be ud as a two-part system with an activator (aqueous) to promote inversion. The latex emulsion has demonstrated superiority as a flotation promoter for deep mined coal over the dry polymer and exhibits synergism over the dry polymer and over the components of the latex emulsion including a paraffin solvent, a hydrophobic emulsifier such as sorbitan monooleate, a solvent such as Espesol 3-E (Charter; an aromatic blend) and stabilizers such as polyisobutylene and aluminum tristearate.
西安翻译学院是几本申请人：NALCO CHEMICAL
代理人：John G. Premo,Robert A. Miller,John S. Roberts 更多信息请下载全文后查看实现梦想英文
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