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Preparation method of block polyether type ageing oil demulsifier

A technology of block polyether and oil demulsifier, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of complex aging oil composition, reduced electric dehydration efficiency, electric field breakdown, etc. Demulsification effect, the effect of fast demulsification

Inactive Publication Date: 2020-05-29
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Although the electric field demulsification method is widely used, due to the complex composition of the aging oil itself, which may contain conductive substances, it is easy to penetrate the two plates during the dehydration process, causing the voltage to drop and the current to increase instantaneously, resulting in a decrease in the efficiency of electric dehydration. In severe cases, it may occur Accidents such as electric field breakdown

Method used

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  • Preparation method of block polyether type ageing oil demulsifier
  • Preparation method of block polyether type ageing oil demulsifier
  • Preparation method of block polyether type ageing oil demulsifier

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preparation example Construction

[0018] The invention relates to a preparation method of a block polyether type aging oil demulsifier, the general structural formula of the demulsifier is as follows:

[0019]

[0020] in:

[0021] Described preparation method comprises the steps:

[0022] In the first step, put quantitative phenol and ethylene glycol into the first four-part bottle, and the mass ratio of phenol to ethylene glycol added is between 9:1 and 9.5:1; add to the four-part bottle Hydrogen chloride and methanol solution as solvent, the consumption of hydrogen chloride is 3% of the total mass of phenol and ethylene glycol in the quarter bottle, the concentration of methanol solution is 30%, and the consumption is 50% of the total mass of phenol and ethylene glycol in the quarter bottle ;Heat the material in the above-mentioned four-part bottle to 75°C-85°C, and the reaction time is 2.5h. After the reaction is complete, distill at 45°C for 0.5h to obtain the intermediate product A;

[0023] In th...

Embodiment approach

[0027] In the first step, the mass ratio of phenol to ethylene glycol is 9.1:1;

[0028] In the first step, the reaction temperature for generating intermediate product A is 80°C;

[0029] In the second step, the molar ratio of intermediate product A, formaldehyde and triethylenetetramine is 1:4:4, that is, the mass ratio is 1.78:1:4.87;

[0030] In the second step, the dissolution temperature of intermediate product A and triethylenetetramine is 50°C, the reaction temperature of intermediate product A, triethylenetetramine mixed solution and formaldehyde solution is 190°C, and the reaction time is 1h;

[0031] In the second step, the amount of xylene is 50% of the total mass of the material, the reflux dehydration temperature is 100°C to 110°C, and the reflux dehydration time is 2h;

[0032] In the third step and the fourth step, the reaction temperature in the kettle is 140°C, and the pressure gauge reading of the reactor is between 0.2±0.01Mpa during the reaction;

[0033...

Embodiment 1

[0042] Take 45.5g of phenol and 5g of ethylene glycol into the quarter bottle, take 1.515g of hydrogen chloride dropwise into the quarter bottle, then add 26g of methanol solution, heat it with a water bath while stirring, the temperature rises to 80°C, and wait for 2.5 hours to react Fully, stop the stirring, heat the remaining substance to 45°C and distill for 0.5h to obtain the dry liquid of the substance, which is the intermediate product A.

[0043] Take 15g of intermediate product A and 41.1g of triethylenetetramine and put them into a four-neck bottle, heat up the water bath to 50°C to dissolve completely, keep it warm for 15min, then slowly add 8.43g of formaldehyde dropwise, keep it warm for 30min after the dropwise addition, add 32.27g of diethylenetetramine For toluene, heat up to 105°C for reflux dehydration, and then gradually raise the temperature to 190°C after 2 hours. At this time, the transparency of the reactants and xylene gradually increases, and the xylene...

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Abstract

The invention discloses a preparation method of a block polyether type ageing oil demulsifier. The preparation method comprises the following steps: adding a certain amount of phenol and ethylene glycol into a quartered bottle, adding hydrogen chloride and a methanol solution, heating to 75-85 DEG C, reacting for 2.5 hours, and distilling at 45 DEG C to obtain an intermediate product A; putting the intermediate product A and triethylene tetramine into a quartered bottle, heating to dissolve, slowly dropwise adding a formaldehyde solution at the temperature of 40-55 DEG C, carrying out heat preservation reaction, adding xylene, carrying out reflux dehydration, and distilling off xylene to generate an initiator B; putting the initiator B and catalyst potassium hydroxide into a high-temperature and high-pressure reaction kettle, sealing, introducing propylene oxide, and carrying out a heating reaction to obtain an intermediate product 1; and adding potassium hydroxide into the intermediate product 1, introducing ethylene oxide, and carrying out a heating reaction to obtain the block polyether type aging oil demulsifier. The block polyether type aging oil demulsifier prepared by the method has more branched chain structures, and can better destroy the interfacial film on the oil-water surface of the aging oil, thereby achieving the goals of demulsification and dehydration.

Description

technical field [0001] The invention relates to a preparation method of oilfield chemicals, in particular to a preparation method of a block polyether type aging oil demulsifier. Background technique [0002] In the process of oilfield exploitation, due to oxidation, pollution or staying in the sedimentation separation equipment for a long time, some oil products are under the action of comprehensive factors such as chemicals, mechanical impurities, colloidal asphaltenes, bacteria, air, and circulating shear. Its physical and chemical properties change to form a crude oil emulsion, which is called aging oil. The existence of aging oil is inevitable. A series of factors such as oily sludge, crude oil recovered and treated from sewage, multiple storage, transportation, loading and unloading of crude oil, and long-term storage due to conditions that cannot be processed in time are the main sources of aging oil. . [0003] A large amount of aged oil is produced in our country ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C10G33/04
CPCC08G65/2627C10G33/04
Inventor 魏立新刘扬代轩瑞卢梦媚李哲叶霖宋洋耿孝恒张成玥贾新磊
Owner NORTHEAST GASOLINEEUM UNIV
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