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Preparation method of novel polyol demulsifier

An alcohol demulsifier and multi-component technology, which is applied in the field of preparation of new polyol demulsifiers, can solve the problems of difficult surface oil and water treatment, complex properties of produced fluid, and polyol demulsifiers that have not been seen yet, and achieve low oil content in water, The effect of fast oil-water separation

Active Publication Date: 2015-05-27
SHENGLI OILFIELD SHENGLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, major oilfields in China have entered the late stage of ultra-high water-cut development, and the original hard-to-produce reserves (such as high-heavy oil, super-heavy oil, and oil reservoirs with poor geological conditions) have been gradually developed, and the measures of intensive production and injection to increase production are increasing day by day. As a result, the properties of the produced fluid in the current development process have undergone major changes compared with the primary and secondary oil recovery stages, especially the large-scale implementation of the tertiary oil recovery, which makes the properties of the produced fluid more complex, which also brings greater pressure on surface oil and water treatment. difficulty
At present, there is no relevant report on polyol demulsifier obtained by using neopentyl glycol to participate in the polymerization reaction

Method used

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  • Preparation method of novel polyol demulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] first step

[0022] Add 300kg of neopentyl glycol and 6kg of KOH catalyst into the polyether reactor, start stirring, heat the material to 100°C ~ 110°C, vacuum dehydrate (about 10min), and close the vacuum valve when no water is distilled out. Make the pressure in the kettle close to -0.08~-0.10 Mpa; then slowly introduce 2700kg of propylene oxide, control the reaction pressure ≤ 0.4Mpa, and keep the reaction temperature at 130~140°C; No longer falling, the reaction is over, and the material is discharged for use.

[0023] second step

[0024] Take 300kg of the above materials and 9kg of KOH catalyst into the polyether reactor, start stirring, heat the materials to 100°C~110°C, vacuum dehydrate (about 10min), and when no water is distilled out, close the vacuum valve to make the kettle The medium pressure is close to -0.08~-0.10 Mpa; then slowly introduce 2700kg propylene oxide and 1285kg ethylene oxide in sequence, control the reaction pressure ≤ 0.4Mpa, and keep th...

Embodiment 2

[0027] first step

[0028] Add 250kg of neopentyl glycol and 6kg of KOH catalyst into the polyether reactor, start stirring, heat the material to 100°C-110°C, vacuum dehydrate (about 20min), and close the vacuum valve when no water is distilled out. Make the pressure in the kettle close to -0.08~-0.10 Mpa; then slowly feed 2500kg of propylene oxide, control the reaction pressure ≤ 0.4Mpa, and keep the reaction temperature at 130~140°C; No longer falling, the reaction is over, and the material is discharged for use.

[0029] second step

[0030] Add 220kg of the above material and 9kg of KOH catalyst into the polyether reactor, start stirring, heat the material to 100°C ~ 110°C, and vacuum dehydrate (about 20min). The medium pressure is close to -0.08~-0.10 Mpa; then slowly feed 2780kg propylene oxide and 1285kg ethylene oxide in sequence, control the reaction pressure ≤ 0.4Mpa, and keep the reaction temperature at 130~140°C; after passing through, maintain the reaction tempe...

Embodiment 3

[0033] first step

[0034] Add 300kg of neopentyl glycol and 6kg of KOH catalyst into the polyether reactor, start stirring, heat the material to 100°C ~ 110°C, vacuum dehydrate (about 10min), and close the vacuum valve when no water is distilled out. Make the pressure in the kettle close to -0.08~-0.10 Mpa; then slowly introduce 2700kg of propylene oxide, control the reaction pressure ≤ 0.4Mpa, and keep the reaction temperature at 130~140°C; No longer falling, the reaction is over, and the material is discharged for use.

[0035] second step

[0036] Add 300kg of the above materials and 9kg of KOH catalyst into the polyether reaction kettle, start stirring, heat the materials to 100°C~110°C, vacuum dehydrate (about 10min), and when no water is distilled, close the vacuum valve to make the kettle The medium pressure is close to -0.08~-0.10 Mpa; then slowly feed 2100kg propylene oxide and 1255kg ethylene oxide in sequence, control the reaction pressure ≤ 0.4Mpa, and keep the ...

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Abstract

The invention discloses a preparation method of a novel polyol demulsifier. The preparation method comprises the following steps: (1) firstly, carrying out polymerization reaction on neopentyl glycol and propylene oxide according to the mass ratio to be 1 to (59-179) to obtain a poly-intermediate; (2) secondly, carrying out polymerization reaction on the poly-intermediate and ethylene oxide to obtain a target macromolecular polymerization product, wherein the dosage of the ethylene oxide is 15-75 times of the mass of the neopentyl glycol in the first step; in the two polymerization reactions, the reaction pressure needs to be controlled to be smaller than or equal to 0.4 Mpa, the reaction temperature is kept at 130-140 DEG C, and the polymerization reactions are finished when the reaction temperature does not descend; and (3) finally, mixing the target macromolecular polymerization product and a solvent, and diluting to obtain the polyol demulsifier. According to the preparation method disclosed by the invention, the novel polyol demulsifier is a bifunctional type agent, is strong enough in philic charge property to balance negative charges and strong in surfactant, is capable of destroying the interfacial energy of an emulsion and has the characteristics of rapidness in oil and water separation speed and low oil content in water.

Description

technical field [0001] The invention belongs to the technical field of petrochemical additives for oil field development, and in particular relates to a preparation method of a novel polyol demulsifier. Background technique [0002] At present, major oilfields in China have entered the late stage of ultra-high water-cut development, and the original hard-to-produce reserves (such as high-heavy oil, super-heavy oil, and oil reservoirs with poor geological conditions) have been gradually developed, and the measures of intensive production and injection to increase production are increasing day by day. As a result, the properties of the produced fluid in the current development process have undergone major changes compared with the primary and secondary oil recovery stages, especially the large-scale implementation of the tertiary oil recovery, which makes the properties of the produced fluid more complex, which also brings greater pressure on surface oil and water treatment. d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 崔黎黎周建成熊国辉高健慕生一岳振涛姜伟
Owner SHENGLI OILFIELD SHENGLI CHEM
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