摘要
流化催化裂化(FCC)油浆外甩量通常超过5%,需要脱固处理得到澄清油再利用。本文分析得出了向延迟焦化、溶剂脱沥青、减压蒸馏、加氢等重质油加工装置直接掺炼,局限性较大;利用减压蒸馏、溶剂抽提、超临界流体萃取等工艺,对澄清油"掐头去尾",分离组分可生产针状焦、环保橡胶填充油、沥青树脂以及碳素纤维等高附加值产品。油浆组分通过延迟焦化制备针状焦,是工业化应用主体方向,但国内产品质量与国外尚有很大差距;油浆制备环保橡胶填充油,在降低环保橡胶油多环芳烃(PCA)和8种危害性稠环芳烃(PAHs)分别至3%和10mg/kg以下的同时,必须提高芳碳率(C_A)值至10%以上来保持橡胶相容性,其收率及生产成本是工业化应用推广的制约因素。
The yield of slurry oil from FCC unit is usually more than 5%.It is necessary to eliminate solid particles from them for integrated utilization.The decant oil can be directly mixed into the feedstock of some heavy oil processes including delayed coking,solvent deasphalting,asphalt blending,hydrocracking and so on.But the added value of them is low.The current researches about the decant oil focus on component separation through the processes including vacuum distillation,solvent extraction,supercritical fluid extraction and so on.The high-value components from the processes,especially intermediate aromatic component,can be deeply processed into needle coke,environmental friendly rubber filling oil,asphalt resin,carbon fiber and so on.Supercritical fluid extraction can separate the slurry oil at a lower temperature so as to avoid mass destruction of component by distillation with high temperature.Therefore,supercritical fluid extraction is becoming the host research field for producing needle coke.The process of delayed coking is usually used to produce needle coke.Low speed,low temperature and long residence time are required in the early stage of reaction.But it is necessary to raise temperature at later stage for engendering traction on needle coke by masses of airflow which is produced in the reaction.There is still a big gap in product quality between China and foreign countries.The PCA and eight kinds of PAHs of environmental friendly rubber filling oil from slurry oil need to be reduced to 3%and 10mg/kg.Meanwhile,the C_(A) must be maintained above 10%in order to sustain the compatibility with the body of rubber.This contradiction can be solved by screening or compounding extractants.
作者
卢德庆
辛靖
朱元宝
苏梦军
LU Deqing;XIN Jing;ZHU Yuanbao;SU Mengjun(CNOOC Research Institute of Refining and Petrochemicals,Qingdao 266500,Shandong,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2021年第S01期142-149,共8页
Chemical Industry and Engineering Progress
关键词
流化催化裂化
油浆
针状焦
环保橡胶填充油
fluid catalytic cracking(FCC)
slurry oil
needle coke
environmental friendly rubber filling oil
