公开(公告)号：US06605208B2

公开(公告)日：2003-08-12

申请号：US10003607

申请日：2001-11-02

申请人： Kenneth Hucker ,  Sanford P. Brass

发明人： Kenneth Hucker ,  Sanford P. Brass

IPC分类号： C10C104

CPC分类号： C10C3/00 ,  C10G7/06

摘要： A process and apparatus are disclosed that relate generally to a process for reducing harmful or unwanted emissions during the production of asphalt, such as blue smoke. The process includes the introduction of a pump around of the wax oil fraction for re-introduction into the vacuum tower. Additional desirable features include stripping trays below the wax oil collection tray and the feed zone. The result is to produce an asphalt product that creates less blue smoke in the hot mix plant. Another desirable feature is that a product can be created that meets Performance Grade specifications with the addition of polymers or other additives.

公开(公告)号：US06352637B1

公开(公告)日：2002-03-05

申请号：US09467327

申请日：1999-12-20

申请人： Patricia K. Doolin ,  Melvin D. Kiser ,  Robert H. Wombles

发明人： Patricia K. Doolin ,  Melvin D. Kiser ,  Robert H. Wombles

IPC分类号： C10C104

CPC分类号： C10C3/005 ,  C10C3/002

摘要： A high coking value pitch with a relatively low softening point is disclosed. A pitch is distilled or thermally processed to produce an intermediate pitch with an increased coking value and relatively high softening point, then blended with a cutter solvent of a liquid hydrocarbon stream to form a product pitch. The process may be used to increase the coking value of either petroleum or coal tar pitch. Preferably the cutter solvent is methylnaphthalene, or a highly aromatic, low viscosity oil or similar aromatic rich stream having a substantially lower boiling point than the intermediate pitch product.

摘要翻译： 公开了具有较低软化点的高焦化值沥青。 蒸馏或热处理沥青以产生具有增加的焦化值和相对高的软化点的中间沥青，然后与液体烃流的切割溶剂混合以形成产物沥青。 该方法可用于提高石油或煤焦油沥青的焦化值。 优选地，切割溶剂是甲基萘，或者具有比中间沥青产物具有基本上低的沸点的高度芳族，低粘度的油或类似的富含芳烃的流。