CO2/N2 switching type double-circulation extraction process and application thereof

A double-cycle, switch-type technology, applied in water/sludge/sewage treatment, petroleum industry, preparation of liquid hydrocarbon mixtures, etc., can solve the problem of difficult industrialization of oily solid waste cleaning process, easy volatilization of oil-soluble tertiary amines, and application Narrow range and other problems, to achieve good demulsification effect, good economic effect and low cost effect

Active Publication Date: 2021-02-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional oily solid waste cleaning process is mainly based on oil-soluble tertiary amines, such as figure 1 As shown, oily substances in oily solid waste are dissolved by using oil-soluble tertiary amines, and the residue is separated; water is added to the mixed system of dissolved oil and CO 2 , the oil-soluble tertiary amine is protonated, and enters the water phase from the oil phase to form an ammonium salt solution; the oily substance is recovered by liquid separation; N is passed into the ammonium salt solution 2 , deprotonation, convert the ammonium salt into an oil-soluble tertiary amine, separate from the water phase, and obtain an oil-soluble tertiary amine for recycling after dehydration; because the oil-soluble tertiary amine is volatile, highly toxic, low in flash point and flammable Explosion and other characteristics make it difficult to realize the industrialization of the traditional oily solid waste cleaning process, and the application range is narrow

Method used

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  • CO2/N2 switching type double-circulation extraction process and application thereof
  • CO2/N2 switching type double-circulation extraction process and application thereof
  • CO2/N2 switching type double-circulation extraction process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The medicine of this embodiment is: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml dodecane;

[0057] In this embodiment, dodecane is used to replace oily solid waste, and a double-cycle extraction process is established, such as Figure 9 shown;

[0058] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0059] Step S2: Put dodecane in a beaker, put the beaker in a hot water bath, the temperature of the hot water bath is 50°C, add n-decanoic acid into the beaker and keep magnetic stirring at the same time;

[0060] Step S3: Adding polyetheramine D230 aqueous solution while continuously performing magnetic stirring is more conducive to making the reaction system react completely so as to achieve a clear ammonium n-decanoate solution and an oil phase, the upper layer is an oil phase, and the lower layer is an ammonium n-decanoate solution;

[0061] Step S4: separate and...

Embodiment 2

[0066] The drugs used in this example are: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml white oil;

[0067] In this embodiment, white oil is used to replace oily solid waste, and a double-cycle extraction process is established, such as Figure 10 shown;

[0068] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0069] Step S2: Put the white oil in a beaker, put the beaker in a hot water bath, the temperature of the hot water bath is 32°C, add n-decanoic acid into the beaker and keep magnetic stirring at the same time;

[0070] Step S3: Adding polyetheramine D230 aqueous solution while continuously performing magnetic stirring is more conducive to making the reaction system react completely so as to achieve a clear ammonium n-decanoate solution and an oil phase, the upper layer is an oil phase, and the lower layer is an ammonium n-decanoate solution;

[0071] Step S4: sepa...

Embodiment 3

[0076] The medicine used in this embodiment is: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml kerosene;

[0077] In this embodiment, kerosene is used to replace oily solid waste, and a double-cycle extraction process is established, such as Figure 11 shown;

[0078] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0079] Step S2: Put the white oil in a beaker, put the beaker in a hot water bath, the temperature of the hot water bath is 38°C, add n-decanoic acid into the beaker and keep magnetically stirring at the same time;

[0080] Step S3: Adding polyetheramine D230 aqueous solution while continuously performing magnetic stirring is more conducive to making the reaction system react completely so as to achieve a clear ammonium n-decanoate solution and an oil phase, the upper layer is an oil phase, and the lower layer is an ammonium n-decanoate solution;

[0081] Step S...

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Abstract

The invention discloses a CO2/N2 switching type double-circulation extraction process. The process comprises: mixing oil-containing solid waste and organic acid, separating to obtain mixed liquid A and solid waste, adding a polyetheramine aqueous solution into the mixed solution A, separating to obtain an oil phase and a mixed solution B, introducing CO2 into the mixed solution B, protonating, separating to obtain an organic acid and a mixed solution C, returning the organic acid to the oily solid waste, introducing N2 into the mixed solution C, deprotonating to obtain CO2 and a polyetheramineaqueous solution, returning the polyetheramine aqueous solution to the mixed solution A, and returning CO2 to the mixed solution B, wherein the temperature control range of the whole extraction process is 30-70 DEG C. The method has the advantages that (1) the organic acid aqueous solution and the polyether amine aqueous solution are combined for use, so that the purpose of oil removal is achieved, the organic acid aqueous solution and the polyether amine aqueous solution are recycled, the method is environment-friendly and safe to operate, and the oil removal cost is saved, the recovery rateof oil products is high, other impurities are not introduced, and the recovery rate of conventional oil products, especially heavy oil products, can reach 90% or above.

Description

technical field [0001] The invention belongs to the technical field of oily solid waste cleaning, in particular to CO 2 / N 2 On-off double-cycle extraction process and its application in oily solid waste cleaning. Background technique [0002] The traditional oily solid waste cleaning process is mainly based on oil-soluble tertiary amines, such as figure 1 As shown, oily substances in oily solid waste are dissolved by using oil-soluble tertiary amines, and the residue is separated; water is added to the mixed system of dissolved oil and CO 2 , the oil-soluble tertiary amine is protonated, and enters the water phase from the oil phase to form an ammonium salt solution; the oily substance is recovered by liquid separation; N is passed into the ammonium salt solution 2 , deprotonation, convert the ammonium salt into an oil-soluble tertiary amine, separate from the water phase, and obtain an oil-soluble tertiary amine for recycling after dehydration; because the oil-soluble t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/04C02F11/00
CPCC10G1/04C02F11/00
Inventor 戴姗姗鲁红升岳稳健黄志宇
Owner SOUTHWEST PETROLEUM UNIV
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