Method for removing calcium from crude oil

a crude oil and calcium technology, applied in the petroleum industry, hydrocarbon oil refining, etc., can solve the problems of residual product contamination, heavy damage to refinery tower trays and other equipment, and solids other than salts are equally harmful,
US20070125685A1Inactive Publication Date: 2007-06-07GENERAL ELECTRIC CO
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
GENERAL ELECTRIC CO
Publication Date
2007-06-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods for reducing calcium deposition along surfaces in contact with the water phase of a resolved water / oil emulsion are disclosed. High calcium crude oil and the like are contacted with a sequestrant to form a sequestered calcium containing complex that partitions to the water phase in the resolved emulsion. A specifically formulated polymeric deposit control agent is added to the water phase to inhibit calcium deposit formation therein and along surfaces in contact with the water phase.
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Description

FIELD OF INVENTION

[0001] The invention pertains to improved methods for removing calcium from a hydrocarbonaceous medium via extraction by a sequestrant. The sequestrant, when added to the hydrocarbonaceous medium, results in the formation of a calcium complex that partitions to the water phase as the hydrocarbonaceous medium is brought in contact with an aqueous wash phase. A specifically formulated deposit control agent is brought into contact with the water phase to control calcium based deposit formation. BACKGROUND OF THE INVENTION

[0002] All crude oil contains impurities which contribute to corrosion, heat exchanger fouling, furnace coking, catalyst deactivation, and product degradation in refinery and other processes. These contaminants are broadly classified as salts, bottom sediment, and water (BS+W), solids, and metals. The amounts of these impurities vary, depending upon the particular crude. Generally, crude oil salt content ranges between about 3-200 pounds per 1,000 b...

Claims

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