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Crude oil demulsifier and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in the direction of chemical dehydration/demulsification, etc., can solve problems such as poor demulsification effect

Inactive Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a demulsifier with less dosage and high dehydration rate in view of the problem of poor demulsification effect of block polyether demulsifiers and non-polyether demulsifiers in the prior art at low temperature demulsification. High-efficiency crude oil demulsifier with long-lasting dehydration, clear water color, and demulsification effect under low temperature conditions reaching the oil and gas industry standard

Method used

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  • Crude oil demulsifier and preparation method thereof
  • Crude oil demulsifier and preparation method thereof
  • Crude oil demulsifier and preparation method thereof

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preparation example Construction

[0063] In the preparation method of the present invention, the solvent used will be suitable for the solution polymerization reaction of the present invention, and can be selected arbitrarily within the scope of not affecting the demulsifier of the present invention. For example, the solvent is aromatic hydrocarbons, alcohols, Ketone or ester organic solvents, such as benzene, xylene, etc.

[0064] The polymerization reaction of the present invention is preferably carried out at 50-90°C.

[0065] Preferably, the amount of acrylic acid monomer added in the initial stage of the polymerization reaction is 20%-50% of the total amount of acrylic acid, and the remaining acrylic acid monomer can be added continuously dropwise or in batches, and the number of batch additions is 2-6 times , more preferably 3 times. The time intervals of adding acrylic acid monomers can be equal or different, and can be selected according to the needs of the polymerization reaction process.

[0066] I...

Embodiment 1

[0091] Add 10g of block polyether BPE2040 starting with alcohol, 310-520g of alkyl phenolic resin block polyether and 20g of phenolic aldehyde resin block polyether dry agent DPA2031 into the reaction kettle in proportion, and keep stirring 4g of n-dodecyl alcohol and 46g of methanol were added thereto, and the temperature of the kettle was raised to 60°C. After stirring for 30 minutes, 100g of non-polyether demulsifier solution and 4g of isooctyl alcohol polyoxyethylene ether OE35 were added to the mixture. After stirring for 30 minutes, stop heating, stir while cooling, and cool to normal temperature to obtain a low-temperature demulsifier.

Embodiment 2

[0093] Add 5g of block polyether BPE2040, 10g of alkyl phenolic resin block polyether 3105 and 10g of phenolic aldehyde resin block polyether dry agent DPA2031 10g with alcohols as the initiator, into the reaction kettle in proportion, and continuously Under stirring, add 4g of n-octanol and 20g of methanol, raise the temperature of the kettle to 60°C, continue stirring for 30min, add 100g of non-polyether demulsifier solution and 1g of isooctyl alcohol polyoxyethylene ether OE35 to the mixture, After stirring for 30 minutes, stop heating, stir while cooling, and cool to normal temperature to obtain a low-temperature demulsifier.

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Abstract

The invention belongs to the technical field of chemicals for petroleum industry, and particularly relates to a crude oil demulsifier and a preparation method thereof. By utilizing the synergistic effect of a polyether demulsifier and a non-polyether demulsifier, several different types of demulsifiers are compounded to obtain an efficient demulsifier suitable for the thickened oil produced liquid. The crude oil demulsifier provided by the invention has the advantages of small using amount, high dehydration rate, lasting dehydration property, clearness, quick oil-water separation in the demulsification process, clear oil-water interface and few emulsification intermediate layers, and can be used for quickly and efficiently demulsifying heavy oil at a low temperature.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, and in particular relates to a crude oil demulsifier and a preparation method thereof. Background technique [0002] With the rapid development of the petroleum industry and the continuous strengthening of oil recovery technology, the structure of crude oil composition has also changed. Especially at the end of the 20th century, the implementation of tertiary recovery technology and the exploitation of heavy heavy oil have increased the difficulty of demulsification and dehydration of crude oil. . In order to solve the problem of low efficiency of demulsification and dehydration, the oil field needs to dehydrate the crude oil emulsion thermochemically, the temperature rises, the molecular movement intensifies, the viscosity of crude oil decreases, and the oil-water density difference increases, so that the droplets after chemical demulsification are easier to sett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 徐伟侯丹丹张天宇张增丽许春梅
Owner CHINA PETROLEUM & CHEM CORP
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