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Process, method, and system for removing heavy metals from fluids

A technology for heavy metals and trace heavy metals, which is applied in the fields of refining with metal salts, petroleum industry, and treating hydrocarbon oil, etc.

Inactive Publication Date: 2013-08-14
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a need to extract or convert free mercury ions into a form that can be easily recovered and disposed of

Method used

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  • Process, method, and system for removing heavy metals from fluids
  • Process, method, and system for removing heavy metals from fluids
  • Process, method, and system for removing heavy metals from fluids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Examples 1-11 : A series of experiments were performed, each using a different oxidant. Example 1 is a control experiment without using any oxidizing agent (only using the complexing agent TETREN at a final concentration of 30 μM). For each of experiments 2-11, 5 mL of the mercury vapor feed was placed in a 10 mL Teflon capped centrifuge tube. Oxidant was added to achieve the final concentrations shown in Table 1. Shake the tube vigorously for about 2 minutes. Add 5 mL of distilled water to the tube. A predetermined volume of TETREN was added to achieve a final concentration of 30 μM. Again, shake the tube vigorously by hand for about 2 minutes, then centrifuge for 1 minute to separate the oil and water. Hg was determined on oil and water aliquots using a Lumex Hg analyzer equipped with a Pyro-915+. The experimental results are shown in Table 1.

[0087] Table 1

[0088]

Embodiment 12-14

[0089] Examples 12-14: Repeat the same procedure of Examples 1-11, but use different dosage levels of Oxone TM (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) as the oxidizing agent, and using the different complexing agents shown in Table 2 (or not). The results are listed in Table 2.

[0090] Table 2

[0091]

Embodiment 15-25

[0092] Examples 15-25 : The same procedure was repeated, but using different oxidizing agents at different concentrations as indicated in the table, and using TETREN as the complexing agent at a final added concentration of 1,500 ppm. The results are shown in Table 3.

[0093] table 3

[0094]

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PUM

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Abstract

Trace amount levels of heavy metals such as mercury, arsenic, etc., in crude oil are reduced by contacting the crude oil with an oxidizing agent, extracting heavy metals into a water phase for subsequent separation from the crude oil. In one embodiment, the oxidizing agent is selected from the group of hydroperoxides, organic peroxides, inorganic peracids and salts thereof, organic peracids and salts thereof, halogens such as iodine (I2), bromine (Br2), and ozone. In another embodiment, at least a complexing agent selected from the group of metal halides and / or sulfur compounds can be added to facilitate the removal of heavy metals from crude oil by forming soluble heavy metal complexes in the water phase.

Description

[0001] Cross-reference to related applications [0002] This application is a continuation-in-part of US patent applications 12 / 950,060, 12 / 950,170 and 12 / 950,637 (all filed November 19, 2010). This application claims the priority and benefit mentioned above, the disclosures of which are incorporated herein by reference. technical field [0003] The present invention generally relates to processes, methods and systems for the removal of heavy metals such as mercury, arsenic and the like from hydrocarbon fluids such as crude oil. Background technique [0004] Trace amounts of heavy metals such as lead, zinc, mercury, silver, arsenic, etc. may be present in various hydrocarbon streams such as crude oil. In some crude oils, the amount of heavy metals such as arsenic correlates with mercury levels. Depending on the source of the feedstock, this amount can range from below the analytical detection limit (0.5 μg / kg) to several thousand ppb. Trace amounts of these metals need to...

Claims

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Application Information

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IPC IPC(8): C10G27/02C10G27/14C10G29/12C10G27/00
CPCC10G27/12C10G2300/805C10G27/02C10G27/14C10G27/00C10G2300/308C10G29/12C10G27/10C10G2300/205C10G2300/1033C10G2300/80
Inventor 尹苏金
Owner CHEVROU USA INC
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