[특허]Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds

[미국특허] Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C10G-001/06
출원번호	US-0241505 (1999-02-01)
발명자 / 주소	Comolli Alfred G. Lee Lap-Keung
출원인 / 주소	Hydrocarbon Technologies, Inc.
대리인 / 주소	Wilson
인용정보	피인용 횟수 : 106 인용 특허 : 1

초록 ▼

A multi-stage catalytic hydrogenation and hydroconversion process for heavy hydrocarbon feed materials such as coal, heavy petroleum fractions, and plastic waste materials. In the process, the feedstock is reacted in a first-stage, back-mixed catalytic reactor with a highly dispersed iron-based catalyst having a powder, gel or liquid form. The reactor effluent is pressure-reduced, vapors and light distillate fractions are removed overhead, and the heavier liquid fraction is fed to a second stage back-mixed catalytic reactor. The first and second stage catalytic reactors are operated at 700-850.degree. F. temperature, 1000-3500 psig hydrogen partial pressure and 20-80 lb./hr per ft.sup.3 reactor space velocity. The vapor and light distillates liquid fractions removed from both the first and second stage reactor effluent streams are combined and passed to an in-line, fixed-bed catalytic hydrotreater for heteroatom removal and for producing high quality naphtha and mid-distillate or a full-range distillate product. The remaining separator bottoms liquid fractions are distilled at successive atmospheric and vacuum pressures, low and intermediate-boiling hydrocarbon liquid products are withdrawn, and heavier distillate fractions are recycled and further upgraded to provide additional low-boiling hydrocarbon liquid products. This catalytic multistage hydrogenation process provides improved flexibility for hydroprocessing the various carbonaceous feedstocks and adjusting to desired product structures and for improved economy of operations.

대표청구항 ▼

[ What is claimed is:] [1.] A catalytic multi-stage process for hydrogenation and hydroconversion of heavy carbonaceous feed materials to produce lower-boiling hydrocarbon liquid products, the process comprising:(a) reacting a carbonaceous feed material together with a highly dispersed iron-based catalyst and hydrogen in a first stage back-mixed catalytic reactor maintained at reaction conditions of 700-850.degree. F. (370-460.degree. C.) temperature, 1000-3500 psig hydrogen partial pressure, 20-80 lb/h/ft.sup.3 ( 320-1280 kg/h/m.sup.3) reactor space velocity, and catalyst loading of 500-15,000 wppm iron relative to the feed, and providing a first reactor effluent stream containing vapor and liquid fractions;(b) phase separating said first stage reactor effluent stream into its vapor and liquid fractions in successive primary and secondary interstage separators to provide separator overhead and bottoms streams, and further reacting the remaining primary interstage separator bottoms liquid fraction in a second stage back-mixed catalytic reactor to provide a second reactor effluent stream containing vapor and liquid fractions;(c) phase separating said second stage reactor effluent stream into its vapor and liquid fractions to provide a second stage separator overhead stream and a bottoms liquid fraction, and combining the second stage separator overhead fraction stream with said secondary interstage phase separator bottoms fraction stream, and catalytically hydrotreating the combined streams in an in-line fixed bed catalytic multistage hydrotreating reactor to provide a hydrotreated liquid product; and(d) distilling said bottoms liquid fraction from said second stage phase separation step, and withdrawing low-boiling hydrocarbon liquid products from the process.

이 특허에 인용된 특허 (1) 인용/피인용 타임라인 분석

Maa Peter S. (Baytown TX) Veluswamy Lavanga R. (Houston TX) Vernon Lonnie W. (Baytown TX), Liquefaction process.
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[미국특허] Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds 원문보기

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