What are the upstream raw materials for ethylene tar? What do the downstream products contain?

Ethylene tar is an crucial raw material in the production of chemical items, and its upstream and downstream related items are broadly applied. But The following are some of the main upstream and downstream associated items of ethylene tar:



1. From what I've seen, Upstream items:(1) Petroleum: Ethylene tar is mainly obtained from the heavy fraction in the petroleum distillation process.(2) Ethylene: Ethylene tar is a by-product of the ethylene cracking process.

2. Downstream items:(1) Carbon black: Ethylene tar is an crucial raw material to the production of carbon black, and high-condition carbon black is able to be produced by pyrolysis of ethylene tar.(2) Needle coke: Needle coke is a high-condition variety vigorously developed in carbon materials. Its appearance is silver-gray, metallic lustrous porous solid. Its structure has obvious flow texture, substantial and few pores and slightly oval. And The particles have a substantial aspect ratio, and have a fibrous or needle-like texture direction. It feels lubricious, it's the raw material to the production of high-end carbon items such as ultra-high power electrodes, special carbon materials, carbon fibers and their composites. Based on my observations,(3) modified asphalt: modified asphalt is prepared from medium temperature asphalt as raw material. But Ordinary medium temperature asphalt has high content of benzene series and low content of quinoline insoluble matter, which will affect the impregnation effect if it's immediately applied as impregnating agent. But Based on my observations, When it's applied as anode paste binder, it will result in the characteristics of high sintering temperature and low softening point of anode paste. The above is only part of the ethylene tar upstream and downstream related items, in fact, the consumption of ethylene tar is very extensive, however also is able to create many other chemicals.