Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof

A technology of crude oil demulsifier and straight-chain alkyl, which is applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of poor universality of demulsification ability and decline of demulsification ability, and achieve strong demulsification ability and diffusion ability, Strong universality and clear water phase

Active Publication Date: 2013-11-20
金浦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As oilfield production enters a period of high water content, and the proportion of various low-quality crude oils with high acidity, high sulfur, high viscosity, and high specific gravity is getting higher and higher, the phenomenon of crude oil emulsification is becoming more and more serious, and many existing demulsifiers can no longer adapt According to the current demulsification requirements, most of the existing demulsifiers in China have the following disadvantages: the demulsification ability of a single demulsifier is poor in universality, and the demulsification ability of the current crude oil is reduced, and the amount of demulsifiers is gradually increased. In order to deal with these However, there is an urgent need to develop a demulsifier with wide applicability, strong demulsification ability and low dosage.

Method used

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  • Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof
  • Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof
  • Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 15% of the sum of PO and EO mass in the product:

[0027] (1) Synthesis of starter nonylphenolic resin

[0028] Add 190g of melted nonylphenol into a three-necked glass flask, stir, add 1g of potassium hydroxide, and slowly add 150g of 37% formaldehyde solution dropwise at a temperature of 50°C to 80°C; after adding the formaldehyde solution, raise the temperature to 100°C ~120°C, react for 1.5~2.0 hours, then dehydrate for 2~3 hours under the conditions of vacuum degree -0.08Mpa~-0.1Mpa and 145°C~155°C, then cool down and discharge.

[0029] (2) Synthesis of intermediates

[0030] Put 200g of the initiator obtained in step (1) and 33g of the catalyst KOH into a high-pressure reactor, and polymerize 200g of PO10 at a temperature of 115-155°C and a reaction pressure of 0.1-0.8MPa.

[0031] (3) Synthesis of polyether

[0032] Put 40g of the intermediate obtained in step (2) and 3.2g of catalyst KOH into a 1L autoclave, under the conditions of temperature 115-155°C and ...

Embodiment 2

[0034] The mass of EO in the product is 20% of the mass sum of PO and EO:

[0035] Put 40g of the intermediate synthesized in step (2) in Example 1 and 3.2g of catalyst KOH into a 1L high-pressure reactor, and polymerize 200g of PO at a temperature of 115-155°C and a reaction pressure of 0.1-0.8MPa, and then polymerize Connect EO120g, then polymerize PO240g, dehydrate and discharge to obtain polyether.

Embodiment 3

[0037] The mass of EO in the product is 25% of the mass sum of PO and EO:

[0038] Put 40g of the synthetic intermediate in step (2) of Example 1 and 3.2g of catalyst KOH into a 1L high-pressure reactor, and polymerize 185g of PO at a temperature of 115-155°C and a reaction pressure of 0.1-0.8MPa, and then polymerize EO150g, then polymerized PO225g, dehydrated and discharged to obtain polyether.

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Abstract

The invention discloses a polyether crude oil demulsifier using straight chain alkyl phenolic resin as an initiator and a preparation method and an application thereof. The general formula of the polyether crude oil demulsifier using straight chain alkyl phenolic resin as an initiator is A-(PO)a-(PO)b-(EO)c-(PO) m, wherein PO is -(CH2-O-CH2CH2)-, EO is -(O-CH2CH2)-, A and R are straight chain alkyls with carbon number of 6, n is an integer of 5-13, a+b is equal to m, and in the general formula, the mass of EO accounts for 15-25% of the mass sum of EO and PO. The polyether crude oil demulsifier prepared by the invention is simple in preparation process, good in surface activity, strong in demulsification capability and diffusion capability, good in dehydration effect, excellent in capability of perfecting oil-water interface emulsification performance and strong in universality, and the demulsification and dehydration rate of the crude oil reaches to 80-92%.

Description

technical field [0001] The invention relates to a demulsifier for eliminating the emulsified state of crude oil in the process of crude oil extraction and smelting, in particular a polyether crude oil demulsifier using straight-chain alkylphenol-formaldehyde resin as a starting agent, its preparation method and its application. Background technique [0002] In recent years, with the development of the petroleum industry, especially due to the application of enhanced water injection oil recovery technology, especially thermal recovery technology, the water content of crude oil emulsion has increased significantly. In the prior art, in the later stages of secondary oil recovery and tertiary oil recovery, various production stimulation measures such as acidification, fracturing, water shutoff, and profile control were implemented, various chemical flooding injections and the increase in the proportion of heavy oil were implemented. It is also becoming more and more complicated....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 余志兵吴倩葛圣才诸勤明
Owner 金浦新材料股份有限公司
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