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A process for desalting a crude oil and a desalting device

A desalter, crude oil technology, applied in separation methods, chemical instruments and methods, hydrocarbon oil dehydration/demulsification, etc., can solve problems such as corrosion of pipelines and distillation equipment, equipment corrosion, reduction of market value of sour crude oil and crude oil fractions, etc.

Pending Publication Date: 2019-07-19
PETRONAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The presence of acidic impurities in crude oil and crude oil fractions, at high temperatures used in refineries (for example, greater than 200 ° C), will cause corrosion of pipelines and distillation equipment, compared to low acidity crude oil and crude oil fractions, acidic crude oil and crude oil decrease in market value
In particular, it has been found that distillation of crude oils containing naphthenic acids can cause severe corrosion of refinery equipment, especially vacuum distillation units

Method used

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  • A process for desalting a crude oil and a desalting device
  • A process for desalting a crude oil and a desalting device
  • A process for desalting a crude oil and a desalting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] Example 1 - Using 10% water by volume of the mixture.

[0168] The sour crude was mixed with an ionic liquid in an amount of 0.7% (by weight of the sour crude) until the TAN test of the crude reached -1 Oil. Mixing is achieved by passing the stream through a mixing valve and is complete within 4 hours.

[0169] The crude oil containing salt is then combined with the water stream in a continuous operation mode to form a mixture containing about 10% water by volume. Further mixing is achieved by passing the combined stream through a second mixing valve.

[0170] The combined stream was fed into a separation vessel containing an electrostatic field of 6 kV alternating current to increase the rate of phase separation.

[0171] By analyzing the process, the amount of naphthenate recovered from the process was determined. The process approaches a steady state situation with an increased amount of naphthenate recovered. from image 3 As can be seen in the figure, once the...

Embodiment 2

[0172] Example 2 - Using 10% water by volume of the mixture.

[0173] By utilizing the same structure as in Example 1, but increasing the water feed to an amount of 30% by volume of the mixture, the total amount of naphthenate that can be recovered can be increased to over 70 mole % (see figure 2 ).

[0174] from Figure 4 As can be seen in the figure, once the process reaches steady state conditions, the recovery of naphthenate exceeds 30 mol%.

[0175] This shows that recovery of naphthenate from the mixture is improved by increasing the amount of water added to the process.

[0176] Figure 5 to Figure 9 Also shown is mass balance data from a process using 10% water by volume of the mixture.

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Abstract

The present invention relates to a process of desalting a crude oil and a desalting device, in particular a process for desalting a crude oil which comprises an ionic liquid, an organic acid and any resulting organic salt. The method comprises the following steps: introducing a mixture containing crude oil, the ionic liquid and the organic acid together into the desalting device, and adding more than 10% by volume of water relative to the mixture; separating the crude oil phase from the one or more liquid phases containing the ionic liquid, the organic acid and the water.

Description

technical field [0001] The present invention relates to a method of desalting crude oil, in particular to a method of desalting crude oil comprising ionic liquids, organic acids and any organic salts produced therefrom. Background technique [0002] Desalters have been used for many years to remove inorganic salts from crude oil. A typical desalter consists of a storage tank into which crude oil and water are added. Salts are extracted from crude oil through the aqueous phase. In typical desalination methods, only small amounts of water are introduced into storage tanks. This is to maximize the amount of crude oil that can be processed and minimize the amount of wastewater that will be sent to the wastewater treatment facility. The small amount of water also minimizes the corrosion and fouling that occurs in the desalination unit. For example, crude oil often contains small inorganic salts such as NaCl, CaCl 2 and MgCl 2 . At high temperature and / or pressure, water ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G31/08
CPCC10G31/08C10G33/00C10G53/02B03C11/00C10G2300/1033B01D17/045B01D17/06C10G33/02C07C51/48C10G21/08C10G21/28
Inventor 克里斯·安德森阿兹兰·侯赛因马丁·阿特金斯贾迈利·巴萨尔
Owner PETRONAS
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