摘要
在流化催化裂化技术基础上开发成功的几种重质油生产气体烯烃技术已获得满意的结果，其中ＤＣＣ－Ⅰ型和ＭＧＧ已实现工业化，工业试验和运行结果与中试结果吻合，ＤＣＣ－Ⅱ型和ＭＩＯ即将进行工业试验。可以把ＤＣＣ－Ⅰ型、ＤＣＣ－Ⅱ型、ＭＧＧ、ＭＩＯ和ＣＰＰ这五种工艺归纳为两类：一类是在与常规催化裂化相接近或较为苛刻的条件下操作，ＭＧＧ、ＭＩＯ和ＤＣＣ－Ⅱ型属于这一类。它们可通过对反应－再生系统的适当改造，使之适宜于生产优质汽油组分，并提供更多的和作为醚化、烷基化和叠合的原料，尽可能满足新配方汽油的生产需求。另一类是ＤＣＣ－Ⅰ型和ＣＰＰ工艺，目的在于生产以乙烯和丙烯为主的气体烯烃，用作石油化工的基本原料，其液体产物可通过选择性加氢和溶剂抽提过程，生产以烷基苯和烷基萘为主的有机化工原料。烷基苯通过异构化和歧化可望得到更多的对二甲苯。裂解轻油经溶剂抽提，抽余油是优质的柴油调合组分，抽出油主要为烷基萘，可作为良好的导热油，也可望作为水泥减水剂或其它有机化工原料。
several new processes for the gaseous olefin production with heavy oil as feedstockhave been successfully developed based on the technique of fluidized catalytic cracking, in which DCC-Ⅰand MGG have been commercialized and the results coincided with those of pilot plants. DCC-Ⅱ and MIOare expected to undergo commercial trial this year. All these processes including DCC-Ⅰ,DCC-Ⅱ,MGG,MIO and CPP can be divided into two categories: MGG, MIO and DCC-Ⅱ belong to the category one,which aims at the production of premium gasoline components and provides substantial amount of C_4 and C_5olefin fraction as feed for etherification, alkylation and oligomerization for the need of reformulated gasoline. The operating conditions of those processes are quite similar or more severe than those of conventionalFCC,DCC-Ⅰ and CPP are classified as category two, which focus mainly on providing ethylene and propylene as petrochemical basic raw material. The liquid products therefor can be selectively hydrotreated andfollowed by solvent extraction to provide alkylbenzenes and alkylnaphthalenes as basic organically chemicalraw material. More p-xylene may be obtained by disproportionation and isomerization of alkylbenzenes.LCO can be solvent extracted into raff mate and extract oil,in which the former is an excellent diesel fuelcomponent and the later can be used as a heat-transmission oil or raw material for water-reducing agent ofcement
出处
《石油炼制与化工》
CAS
CSCD
1994年第7期1-8,共8页
Petroleum Processing and Petrochemicals
