co2/n2 switch-type double-circulation extraction process and its application

A dual-circulation, on-off technology, used in the petroleum industry, water/sludge/sewage treatment, sludge treatment, etc., can solve the problem that the oil-containing solid waste cleaning process is difficult to achieve industrialization, oil-soluble tertiary amines are volatile, and the application range is narrow. and other problems, to achieve the effect of good demulsification effect, good economic effect and low cost

Active Publication Date: 2022-02-25
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 switch-type double-circulation extraction process and its application
  • co2/n2 switch-type double-circulation extraction process and its application
  • co2/n2 switch-type double-circulation extraction process and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The medicine of this embodiment is: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml dodecane;

[0059] In this embodiment, dodecane is used to replace oily solid waste, and a double-cycle extraction process is established, such as Figure 9 shown;

[0060] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0061] 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;

[0062] 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;

[0063] Step S4: separate and...

Embodiment 2

[0068] The drugs used in this example are: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml white oil;

[0069] 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;

[0070] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0071] 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;

[0072] 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;

[0073] Step S4: sepa...

Embodiment 3

[0078] The medicine used in this embodiment is: 50ml deionized water+0.5g polyetheramine D230+0.749g n-decanoic acid+20ml kerosene;

[0079] In this embodiment, kerosene is used to replace oily solid waste, and a double-cycle extraction process is established, such as Figure 11 shown;

[0080] Step S1: Mix 50ml of deionized water and 0.5g of polyetheramine D230 to obtain an aqueous solution of polyetheramine D230;

[0081] 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 magnetic stirring at the same time;

[0082] 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;

[0083] Step S4: s...

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Abstract

The invention discloses a CO 2 / N 2 Switch-type double-cycle extraction process, oily solid waste and organic acid are mixed and separated to obtain mixed liquid A and solid waste; polyetheramine aqueous solution is added to mixed liquid A to separate oil phase and mixed liquid B, and CO is introduced into mixed liquid B 2 After protonation, the organic acid and the mixed solution C are separated, the organic acid is returned to the oily solid waste, and N is passed into the mixed solution C 2 CO is obtained after deprotonation 2 And polyetheramine aqueous solution, polyetheramine aqueous solution returns in the mixed solution A, CO 2 Returning to the mixed solution B, the temperature control range of the whole extraction process is 30-70°C; (1) The combination of organic acid and polyether amine aqueous solution not only achieves the purpose of oil removal but also realizes the separation of organic acid and polyether amine. The recycling of amine aqueous solution is environmentally friendly, safe in operation and saves oil removal costs; the recovery rate of oil products is high, and no other impurities are introduced. The recovery rate of conventional oil products, especially heavy oil products, can reach 90%. 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 Patents(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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