[특허]Heavy oil hydroprocess including recovery of molybdenum catalyst

Heavy oil hydroprocess including recovery of molybdenum catalyst 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01J-038/66
출원번호	US-0767821 (1985-08-21)
발명자 / 주소	Lopez Jaime (Benicia CA) Pasek Eugene A. (Export PA) Cugini Anthony V. (Pittsburgh PA)
출원인 / 주소	Chevron Research Company (San Francisco CA 02)
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

A process for the recovery of a spent molybdenum catalyst from a hydroprocess for the upgrading of a nickel and vanadium containing hydrocarbonaceous mineral oil. The nickel and vanadium contaminated molybdenum catalyst is oxidized to convert the metals to oxides. Aqueous ammonia is added to preferentially dissolve molybdenum from nickel and vanadium. An amount of ammonia is used in excess of the amount required to produce an active catalyst for recycle and the excess ammonia is removed prior to recycle of the catalyst. The selectively of the separation of molybdenum from nickel and vanadium is improved by adding a reducing agent before or during the ammonia dissolving step. Hydrazine is a suitable reducing agent. The recovered molybdenum is sulfided and recycled.

대표청구항 ▼

A method for the recovery of spent catalyst from a hydroprocess for treating vanadium-containing hydrocarbon oil, said spent catalyst comprising molybdenum sulfide which is contaminated with vanadium sulfide accumulated from said hydrocarbon oil, said method comprising passing said vanadium contaminated molybdenum sulfide catalyst through an oxidizing zone to convert said molybdenum sulfide and said vanadium sulfide to oxides, passing said oxides and aqueous ammonia to a dissolving zone to preferentially dissolve molybdenum from vanadium, removing undissolved vanadium from said dissolving zone, and removing an aqueous stream comprising dissolved molybdenum and ammonia from said dissolving zone, wherein the mole ratio of ammonia to total metals in said spent catalyst in said dissolving zone is at least 2.5.

이 특허를 인용한 특허 (51)

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Lott, Roger K.; Lee, Lap Keung, Methods and systems for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst.
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Lott, Roger K.; Lee, Lap-Keung, Methods for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst and recycling the colloidal or molecular catalyst.
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