公开(公告)号：US07604731B2

公开(公告)日：2009-10-20

申请号：US10892024

申请日：2004-07-15

申请人： Debasis Bhattacharyya ,  Satheesh Vetterkunnel Kumaran ,  Bandaru Venkata Hari Prasad Gupta ,  Pramod Kumar ,  Asit Kumar Das ,  Gadari Saidulu ,  Satyen Kumar Das ,  Gurpreet Singh Kapur ,  Veena Bansal ,  Venkatachalam Krishnan ,  Satish Makhija ,  Sobhan Ghosh ,  Niranjan Raghunath Raje

发明人： Debasis Bhattacharyya ,  Satheesh Vetterkunnel Kumaran ,  Bandaru Venkata Hari Prasad Gupta ,  Pramod Kumar ,  Asit Kumar Das ,  Gadari Saidulu ,  Satyen Kumar Das ,  Gurpreet Singh Kapur ,  Veena Bansal ,  Venkatachalam Krishnan ,  Satish Makhija ,  Sobhan Ghosh ,  Niranjan Raghunath Raje

IPC分类号： C10G51/02 ,  C10G9/00

CPC分类号： C10G9/005 ,  C10B55/00 ,  C10G51/023

摘要： A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 440 to 520° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm2 to separate the easily cokable material, separating the cracked products in a quench column and a distillation column and then subjecting the hydrocarbon fraction from the bottom of the quench column and a hydrocarbon fraction having a boiling point in the range of 380 to 480° C. from the distillation column and/or any other suitable heavier hydrocarbon streams in a definite ratio depending on certain characteristic parameters to thermal cracking in a second soaking column at a temperature of 460 to 540° C., pressure in the range of 2 to 20 kg/cm2 in presence of added quantity of steam for formation of a mesophase carbonaceous structure which on steam stripping and cooling forms a solid crystalline coke suitable for manufacturing of graphite electrode of large diameter having co-efficient of thermal expansion lower than 1.1×10−6/° C. measured on graphite artifact in the temperature range of 25 to 525° C.

摘要翻译： 公开了一种用于从具有不超过0.7重量％的硫的重大气压蒸馏残余物生产针状焦炭的方法，该方法包括将原料加热至440-520℃范围内的温度以进行浸泡中的热裂解 柱在1至10kg / cm2的压力范围内以分离容易结合的材料，将裂化产物在骤冷塔和蒸馏塔中分离，然后对来自骤冷塔的底部的烃馏分和具有 取决于某些特征参数与第二个均热塔中的热裂解在460至540℃的温度下，从蒸馏塔和/或任何其它合适的较重烃流中的沸点在380至480℃范围内 在蒸汽的形成中间相含碳结构的添加量存在下，在2至20kg / cm2的范围内的压力，在汽提和 冷却形成适用于制造热膨胀系数小于1.1×10 -6 /℃的大直径石墨电极的固体结晶焦炭，在25至525℃的温度范围内测量石墨伪影。