Hydrocarbon hydrotreating device and method for removing chloride from a hydrocarbon stream
a hydrotreating device and hydrocarbon technology, applied in the direction of hydrocarbon oil dewatering/demulsification, hydrocarbon oil treatment, tar working up by chemical refining, etc., can solve the problems of high risk of chloride contamination in the hydrotreating device, low efficiency of the hydrotreating device, and high cost of operation and maintenance of the hydrotreater
Inactive Publication Date: 2015-02-26
UOP LLC
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Benefits of technology
The patent describes a device used for treating hydrocarbons. The device includes a crude, vacuum, or coker column, an adsorbent bed, and a hydrotreater reactor. The adsorbent bed is sited downstream of the column and is capable of removing chlorides from the hydrocarbon stream before it reaches the hydrotreater reactor. The technical effect of this device is to improve the quality of the hydrocarbon stream by removing harmful contaminants like chlorides, which can damage equipment and cause environmental concerns.
Problems solved by technology
Accordingly, historic crude assays do not provide a reliable indication of future chloride levels.
Thus, newly selected crude oils are always viewed as posing a high risk for chloride contamination in a hydrotreating device.
However, such hydrotreaters are expensive to operate and / or to maintain.
Thus their operation is impractical.
Other mitigation measures, including metallurgical upgradation and wash water, have limitations which prevent widespread use.
Excess chlorides can lead to catastrophic failures, including chloride stress corrosion cracking (SCC).
However, SCC-resistant materials are typically more expensive to purchase and maintain.
Method used
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[0009]A process has been developed to remove organic and inorganic chlorides from a hydrocarbon stream before the stream enters a hydrotreater reactor.
[0010]Referring now to the FIGURE, a hydrotreater process including chloride adsorption is generally designated 10. A hydrocarbon stream containing organic and inorganic chlorides is provided from one or more of a vacuum column, a crude column, and a coker column through a line 12. The hydrocarbon stream preferably includes one or more of light vacuum gas oil, heavy vacuum gas oil, heavy atmospheric gas oil, heavy coker gas oil, light coker gas oil, light, light coker gas oil, vacuum column overhead, cracked naphtha, and straight run naphtha. One example hydrocarbon stream includes light vacuum gas oil, heavy vacuum gas oil, heavy coker gas oil and naphtha. The hydrocarbon stream leaving the column typically has a chloride content up to 40 parts per million, by weight. The line 12 is preferably split. A tankage line 14 allows the stre...
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A method for processing hydrocarbons includes providing a hydrocarbon stream including chlorides from one or more of a crude, vacuum or coker column and contacting the provided hydrocarbon stream with an adsorbent capable of adsorbing the chlorides from the hydrocarbon stream. The dechlorinated hydrocarbon stream is then provided to a hydrotreater reactor.
Description
BACKGROUND OF THE INVENTION[0001]Incremental shifts in crude oil demands have caused increases in diesel and jet fuel production, leading refiners to run their units in distillate mode and increasing demand for hydrotreaters. However, crude contaminants must be dealt with before the hydrotreating process. In particular, chloride contaminants including organic and inorganic chlorides must be mitigated.[0002]Organic chloride content is not an intrinsic property of crude oil, but originates from accidental or unintentional contamination thereof. That is, the amount of organic chlorides found in the crude is not related to the location from which the crude originated or other physical properties of the crude oil. Accordingly, historic crude assays do not provide a reliable indication of future chloride levels. Thus, newly selected crude oils are always viewed as posing a high risk for chloride contamination in a hydrotreating device.[0003]Conventionally, it is possible to run hydrotreat...
Claims
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Login to View More IPC IPC(8): C10G67/06
CPCC10G67/06C10G25/03C10G2300/1074C10G2300/202
Inventor VILASRAO DALAL, VIKRANTROY, PIJUS KANTI
Owner UOP LLC