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Method for preparing and using composite demulsifying agent

A demulsifier and composite technology, which is applied in the field of preparation of composite demulsifiers, to achieve the effects of saving production costs, wide applicability, and good demulsification effect

Inactive Publication Date: 2008-09-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve some problems existing in traditional organic demulsifiers, the present invention provides a compound demulsifier and its application method

Method used

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  • Method for preparing and using composite demulsifying agent

Examples

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Embodiment 1

[0013] Add 0.1 part of polyacrylamide, 0.2 part of ethylene oxide, 0.5 part of diesel oil demulsifier by weight components, and the rest is sodium sulfate. Add 1 mol / l sulfuric acid to control the pH value at 3. Stir and mix evenly to obtain a composite demulsifier. The method of use is as follows: add 3% demulsifier to the diesel alkali slag by weight percentage, fully mix at 60°C, and after standing for 2 hours, the oil-water layer becomes clear.

Embodiment 2

[0015] Add 0.2 parts of polyacrylamide, 0.4 parts of ethylene oxide, 1 part of diesel oil demulsifier by weight components, and the rest is sodium sulfate. Add 1 mol / l sulfuric acid to control the pH value at 3.5. Stir and mix evenly to obtain a composite demulsifier. The method of use is as follows: add 8% demulsifier to the diesel alkali slag by weight percentage, fully mix at 70°C, and after standing for 5 hours, the oil-water layer becomes clear.

Embodiment 3

[0017] Add 0.3 parts of polyacrylamide, 0.6 parts of ethylene oxide, 2 parts of diesel oil demulsifier by weight components, and the rest is sodium sulfate. Add 1 mol / l sulfuric acid dropwise to control the pH value at 4. Stir and mix evenly to obtain a composite demulsifier. The method of use is as follows: add 4% demulsifier to the diesel alkali slag by weight percentage, fully mix at 50 DEG C, and after standing for 4 hours, the oil-water layer becomes clear.

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Abstract

The invention discloses a preparation method and a use method for a composite emulsion splitter, solving the selectivity problem of the prior organic emulsion splitter to reduce environmental pollution. The preparation method for the composite emulsion splitter comprises the following steps of: counted by the following weight components, adding 0.1-0.3 portions of polyacrylamide, 0.1-1 portions of epoxy ethane, 0.3-5 portions of diesel oil emulsion splitter, and the rest component is sodium sulfate; dripping 1mol / 1 sulphuric acid and controlling pH value ranging from 3 to 7; stirring and mixing evenly at 100-150 DEG C and finally obtaining the composite emulsion splitter, wherein the compositions of the diesel oil emulsion splitter are counted by the weight portions: linear polyether 70 portions, ester catalyst 1.5 portions, initiator 4 portions, functional monomer 20 portions, and other composition is benzene or alcohols solvent, wherein, the functional monomer with double bonds comprises functional groups -OH, -COOH and -NH2. The use method comprises the steps of: adding 2 to 10 percent of emulsion splitter into diesel oil caustic sludge according to the weight percent; mixing sufficiently at the temperature of 50-80 DEG C; after standing for 1-8 hours, obtaining clear oil-water stratification.

Description

technical field [0001] The invention relates to the preparation and application method of a composite demulsifier Background technique [0002] In recent years, the variety of crude oil refined by refineries has increased, and the properties of crude oil have changed greatly. With the continuous development of oil fields and the application of various enhanced oil recovery methods, the problem of demulsification and dehydration of crude oil is becoming more and more complicated. Crude oil is in the state of oil-water separation in the formation, and the strong mixing of crude oil and water in the process of exploitation and gathering and transportation forms emulsified crude oil with different stability. Chemical demulsification is the cheapest, most convenient and effective method among crude oil demulsification and dehydration methods. However, the selectivity of the demulsifier is very strong, and no demulsifier suitable for various crude oils has been found so far. ...

Claims

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Application Information

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IPC IPC(8): C10G33/00B01D17/04C08L33/26C08K5/15C08K3/30
Inventor 曹成波吴艳萍
Owner SHANDONG UNIV