Polyether demulsifying agent based on hydramine-modified phenolic resin and synthesizing method thereof

A technology of polyether demulsifier and phenolic resin, applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of poor dehydration effect of polyether demulsifier, and achieve the effect of wide application range and good dehydration performance

Active Publication Date: 2016-08-24
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a polyether demulsifier based on alcohol amine modified phenolic resin and its synthesis method, which overcomes the problem of poor dehydration effect of the phenolic resin type polyether demulsifier in the prior art

Method used

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  • Polyether demulsifying agent based on hydramine-modified phenolic resin and synthesizing method thereof
  • Polyether demulsifying agent based on hydramine-modified phenolic resin and synthesizing method thereof
  • Polyether demulsifying agent based on hydramine-modified phenolic resin and synthesizing method thereof

Examples

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Effect test

Embodiment 1

[0018] The synthesis of polyether demulsifier DE-01 based on diethanolamine modified p-tert-butylphenolic resin, the mass ratio of initiator: propylene oxide: ethylene oxide is 1:29:10, the synthesis steps are as follows:

[0019] (1) Add 150.3g of p-tert-butylphenol, 64.8g of formaldehyde and 0.6g of oxalic acid into a four-necked flask equipped with a stirrer, a thermometer and a condenser, stir evenly at 45°C, and then heat up to 75-80°C for reaction Heating was stopped after 4h. The crude product was dehydrated under reduced pressure with a rotary evaporator, and finally dehydrated under reduced pressure at 120-130°C and -0.095MPa for 2 hours to obtain p-tert-butylphenol-formaldehyde resin, whose structure is shown in formula II-1.

[0020]

[0021] (2) Get p-tert-butylphenol-formaldehyde resin 159.7g, diethanolamine 46.3g and 30% ZnCl 2 8 mL of the solution was placed in a three-necked flask and stirred evenly, and 40.5 g of formaldehyde was added dropwise at 50°C. Af...

Embodiment 2

[0026] The synthesis of polyether demulsifier DE-02 based on diethanolamine modified p-tert-butylphenolic resin, the mass ratio of initiator: propylene oxide: ethylene oxide is 1:59:24, and the synthesis steps are as follows:

[0027] Take 100 g of polyether oil head in step (3) of Example 1 and 2.6 g of potassium hydroxide in a 2L high-temperature and high-pressure magnetic stirrer, start the stirring and heat up, replace with nitrogen 3 times and dehydrate under reduced pressure for 30 minutes, and wait until the temperature rises to 500g of propylene oxide is introduced at around 120°C, the reaction temperature is controlled at 120-140°C, the pressure is lower than 0.5MPa, and the reaction is kept for 1h after the reaction reaches negative pressure. When the temperature drops to about 110°C, 240g of ethylene oxide is introduced, the reaction temperature is controlled at 110-130°C, and the pressure is lower than 0.5MPa. After the temperature reaches negative pressure, keep wa...

Embodiment 3

[0029] The synthesis of polyether demulsifier DE-03 based on diethanolamine modified p-tert-butylphenolic resin, the mass ratio of initiator: propylene oxide: ethylene oxide is 1:99:50, the synthesis steps are as follows:

[0030] Take 100 g of polyether oil head and 4.5 g of potassium hydroxide in step (3) of Example 1 in a 2L high-temperature and high-pressure magnetic stirrer, start the stirring and heat up, replace with nitrogen 3 times and vacuum dehydrate for 30 minutes, and wait until the temperature rises to 120 900g of propylene oxide is introduced at about ℃, the reaction temperature is controlled at 120-140℃, the pressure is lower than 0.5MPa, and the reaction is kept under negative pressure for 1h. When the temperature drops to about 110°C, 500g of ethylene oxide is introduced, the reaction temperature is controlled at 110-130°C, and the pressure is lower than 0.5MPa. After the temperature reaches negative pressure, keep warm for 1 hour.

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Abstract

The invention discloses a polyether demulsifying agent based on hydramine-modified phenolic resin and a synthesizing method thereof. The demulsifying agent is characterized in that the hydramine-modified phenolic resin is taken as an initiator, and is subjected to block polymerization with propylene epoxide and ethylene oxide to obtain a polyether macromolecular demulsifying agent, wherein the mass ratio of the initiator to the propylene epoxide to the ethylene oxide is 1:(29-199):(10-100). The synthesizing method of the polyether demulsifying agent based on hydramine-modified phenolic resin comprises the following steps: synthesizing the phenolic resin; synthesizing the hydramine-modified phenolic resin; and the synthesizing polyether based on the hydramine-modified phenolic resin base. The molecular structure of the demulsifying agent has the characteristics of multiple aromatic rings and multiple branches, oil-water interference strength can be lowered effectively, and the aim of rapidly demulsifying is fulfilled; the demulsifying agent can be used for dehydrating oilfield produced fluid and dehydrating and desalting in oil refineries.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, and relates to a polyether demulsifier and a preparation method thereof, in particular to a polyether demulsifier based on an alcohol amine modified phenolic resin and a synthesis method thereof. Background technique [0002] In recent years, as the production of most oil fields has entered the middle and late stages, and the application of production stimulation technologies such as tertiary oil recovery and large pump extraction, the water content of crude oil has gradually increased. Natural emulsifiers such as colloids, asphaltenes, solid particles, etc. in crude oil, as well as various surfactants, polymers, etc. added in the oil displacement process, lead to complex components of the produced fluid and a significant increase in the strength of the oil-water interface. Large, the stability of the emulsion is enhanced, which seriously affects the process of crude oil production, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G8/28C10G33/04
CPCC08G8/28C08G65/2624C08G2650/50C08G2650/58C10G33/04
Inventor 杜大委魏强代红成郭海军
Owner CHINA NAT OFFSHORE OIL CORP
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