Method of Reducing Impurities in Pyrolysis Oil
US-2024400918-A1 · Dec 5, 2024 · US
Process, method, and system for removing heavy metals from fluids
US8992769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8992769-B2 |
| Application number | US-201313895983-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2013 |
| Priority date | May 16, 2012 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Trace amount levels of heavy metals such as mercury in crude oil are reduced by contacting the crude oil with a sufficient amount of a reducing agent to convert at least a portion of the non-volatile mercury into a volatile form of mercury, which can be subsequently removed by any of stripping, scrubbing, adsorption, and combinations thereof. In one embodiment, at least 50% of the mercury is removed. In another embodiment, the removal rate is at least 99%. In one embodiment, the reducing agent is selected from sulfur compounds containing at least one sulfur atom having an oxidation state less than +6; ferrous compounds; stannous compounds; oxalates; cuprous compounds; organic acids which decompose to form CO 2 and/or H 2 upon heating; hydroxylamine compounds; hydrazine compounds; sodium borohydride; diisobutylaluminium hydride; thiourea; transition metal halides; and mixtures thereof.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for reducing a trace amount of mercury in a crude oil feed, comprising: providing a crude oil feed having a first concentration of non-volatile mercury, mixing an effective amount of a reducing agent with the crude oil feed to convert at least a portion of the non-volatile mercury into a volatile mercury; removing at least a portion of the volatile mercury by at least one of stripping, scrubbing, adsorption, and combinations thereof to obt…
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- C10G29/06Primary
Chemistry & Metallurgy · mapped topic
- C10G29/205Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8992769B2 cover?
- Trace amount levels of heavy metals such as mercury in crude oil are reduced by contacting the crude oil with a sufficient amount of a reducing agent to convert at least a portion of the non-volatile mercury into a volatile form of mercury, which can be subsequently removed by any of stripping, scrubbing, adsorption, and combinations thereof. In one embodiment, at least 50% of the mercury is re…
- Who is the assignee on this patent?
- Chevron Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification C10G29/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).