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Demulsifier, demulsifier composition, preparation method of demulsifier, and application of demulsifier and demulsifier composition

A technology of demulsifier and composition, which is applied in the field of oil field chemicals, can solve the problems of environmental pollution and high cost of demulsifier, and achieve the effect of reducing the interfacial tension of oil and water

Pending Publication Date: 2021-06-01
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chemical method is currently the most commonly used method, but the cost of demulsifiers is high, and the demulsifiers currently used have potential environmental pollution risks

Method used

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  • Demulsifier, demulsifier composition, preparation method of demulsifier, and application of demulsifier and demulsifier composition
  • Demulsifier, demulsifier composition, preparation method of demulsifier, and application of demulsifier and demulsifier composition
  • Demulsifier, demulsifier composition, preparation method of demulsifier, and application of demulsifier and demulsifier composition

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preparation example Construction

[0021] This specific embodiment proposes a method for preparing a demulsifier, comprising the steps of: mixing rice husk and sulfuric acid with a concentration of 0.5-1 mol / L in a polytetrafluoroethylene reactor lining at a mass ratio of 1:15-40, and Carry out hydrothermal reaction at 160-200°C for 8-16 hours, then wash the rice husk after hydrothermal reaction to neutrality, and then vacuum freeze-dry at -52-40°C for 1-4 days to obtain the demulsifier .

[0022] This specific embodiment also includes the demulsifier prepared by the above preparation method.

[0023] This specific embodiment also proposes a demulsifier composition, comprising the above demulsifier and sodium chloride; further, the mass ratio of the demulsifier to the sodium chloride is 1:50-100.

[0024] This specific embodiment also includes the application of the above-mentioned demulsifier or demulsifier composition in the treatment of W / O crude oil emulsion.

Embodiment 1

[0027] Present embodiment proposes a kind of demulsifier, is made by following steps:

[0028] In parts by weight, first weigh 2 parts of rice husks in the lining of a polytetrafluoroethylene reactor, and then measure 35 parts of prepared 1mol / L H 2 SO 4 The solution was placed in the lining of a polytetrafluoroethylene reactor, and reacted hydrothermally at 180°C for 12 hours. After the reaction, it was naturally cooled to room temperature, washed repeatedly with distilled water until neutral, and then the product was vacuum freeze-dried. The vacuum freeze-drying temperature was -50°C, drying time is 1 day to obtain the demulsifier.

[0029] The obtained demulsifier of embodiment 1 is characterized, figure 1 It is the SEM figure of embodiment 1 gained demulsifier, by figure 1 It can be seen that the rice husk after the reaction presents a porous structure; figure 2 It is the FT-IR figure of embodiment 1 gained waste rice husk demulsifier, by figure 2 It can be seen tha...

Embodiment 2

[0031] Present embodiment proposes a kind of demulsifier, is made by following steps:

[0032] In parts by weight, first weigh 2 parts of rice husks in the lining of a polytetrafluoroethylene reactor, and then measure 40 parts of prepared 0.5mol / L H 2 SO 4 The solution was placed in the lining of a polytetrafluoroethylene reactor, and reacted hydrothermally at 160°C for 16 hours. After the reaction, it was naturally cooled to room temperature, washed repeatedly with distilled water until neutral, and then the product was subjected to vacuum freeze-drying. The vacuum freeze-drying temperature was -40°C, drying time is 4 days to obtain a demulsifier.

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Abstract

The invention relates to a demulsifier, a demulsifier composition, a preparation method of the demulsifier, and application of the demulsifier and the demulsifier composition. The method comprises the following steps: mixing rice husks and sulfuric acid, and carrying out a hydrothermal reaction at 160-200 DEG C to obtain the demulsifier. The invention also provides the demulsifier prepared by the preparation method. In addition, the invention also provides the demulsifier composition which comprises the demulsifier and sodium chloride. The invention also provides application of the demulsifier or the demulsifier composition in treatment of a water-in-oil crude oil emulsion. The demulsifier provided by the invention can penetrate and destroy an interfacial film, significantly reduce the oil-water interfacial tension and promote a demulsification process, and has a demulsification rate of up to 89.26%.

Description

technical field [0001] The invention relates to the technical field of oilfield chemicals, in particular to a demulsifier, a demulsifier composition and a preparation method and application thereof. Background technique [0002] A large amount of crude oil emulsion will be produced in the process of oil extraction. These emulsions not only bring many difficulties to the transportation and refining process, but also one of the reasons for the corrosion of pipelines and pumps. Therefore, demulsification and dehydration treatment must be carried out after crude oil is extracted. [0003] Current demulsification methods include gravity or centrifugal settling, filtration, heat treatment, electrostatic demulsification, and chemical demulsification, each of which has its advantages and disadvantages. Centrifugal dehydration is relatively simple, but the dehydration efficiency is low and the cost is high; heat treatment usually leads to the loss of light components in crude oil, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 米远祝袁怀奎曲宝龙叶泛
Owner YANGTZE UNIVERSITY
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