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Processing method for heavy oil

A processing method and technology for heavy oil, which can be used in the fields of chemical dehydration/demulsification, petroleum industry, refined hydrocarbon oil, etc., which can solve the problems of desalination, unsatisfactory dehydration effect, and increasing the difficulty of demulsification.

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, heavy crude oil or residual oil often contains surface active substances such as solid particles and naphthenates, which accumulate at the oil-water interface during the oil-water separation process, further increasing the difficulty of demulsification
[0008] Although the existing technology has improved the desalination and dehydration effects of hydrocarbon oil to a certain extent, for heavy oil (density > 0.95g / cm 3 ), especially heavy crude oil or residual oil with high colloid and asphaltene content, even if chemical additives, electrostatic field, centrifugation and other technical means are used, the desalination and dehydration effects are still unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw material oil is Tahe residual oil, and its density is 0.96g / cm2 at 20°C 3 , containing 23mgNaCl / L salt, 0.5% water content, the density of solvent A is a mixture of water and glycerol, and the mass fraction of water is 67%. To the Tahe residual oil preheated to 80°C, add solvent A with a volume of 15% of the residual oil volume and 50 ppm of demulsifier. Mix at 1000r / min for 30s, then place in a closed container in a water bath at 80°C for 30 minutes to separate the Tahe residual oil from the solvent. After cooling to room temperature, open the closed container to obtain the upper oil phase. The oil phase was subjected to conventional desalination and dehydration treatment, and the salt content and water content in the treated oil were measured, and the results are shown in Table 1.

Embodiment 2

[0034] Raw oil and test method are identical with embodiment 1. Only solvent A is a mixture of water and pentaerythritol (80°C), and the mass fraction of water is 86%. The results are shown in Table 1.

Embodiment 3

[0040] The raw material oil is Liaohe heavy oil with a density of 0.97g / cm at 20°C 3, containing 39mgNaCl / L of salt, water content of 0.6m%, solvent B is a mixture of water and glycerol, and the mass fraction of water is 44%. Add solvent B with a volume of 15% of the volume of the heavy oil to the Liaohe heavy oil preheated to 80°C, then mix the heavy oil and solvent B in a laboratory mixer at a speed of 1000r / min for 30s, and then place in a closed container at Stand in a water bath at 80°C for 30 minutes to separate the Liaohe heavy oil from solvent B. After cooling to room temperature, open the airtight container to obtain the upper oil phase. Perform conventional desalination and dehydration treatments on the oil phase, and measure the concentration in the oil after treatment. Salt content and water content, the results are shown in Table 2.

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Abstract

A processing method for heavy oil comprises: (1) mixing a solvent and heavy oil, and then separating the solvent and heavy oil to obtain an oil phase and a solvent phase, wherein the solvent contains 10m%-100m% of a composition A and 0-90m% of water, the composition A is one or more of C2-C4 polyols and polyhydroxy ethers prepared by performing condensation on two or three C2-C4 polyols, and the solvent accounts for 1%-30% by volume of heavy oil; and (2) performing desalination and / or dewatering processing on the oil phase. The method used for performing desalination and / or dewatering processing on heavy oil has relatively good effect.

Description

technical field [0001] The invention relates to a treatment method for heavy oil, in particular to a treatment method for desalination and / or dehydration of heavy oil. Background technique [0002] The crude oil extracted from the oil field usually contains metals, some of which exist in the form of inorganic salts, such as chloride salts, carbonates, sulfates, nitrates, etc.; the other part of the metals exist in the form of organic metal salts or metal organic compounds, Such as petroleum salts, metal porphyrins, etc. During the distillation of crude oil, some organic metal salts, such as petroleum salts of calcium, iron, sodium, magnesium, etc., will be decomposed into inorganic salts, so the distilled oil often also contains inorganic salts. In addition to crude oil and its distillates, metals may also be present in other hydrocarbon oils, either naturally occurring in those hydrocarbon oils or introduced during the processing or use of the hydrocarbon oils. Metals in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C10G33/00C10G31/00C10G29/00
Inventor 谭丽楚喜丽沈明欢李本高于丽王振宇李峰
Owner CHINA PETROLEUM & CHEM CORP