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Sulfonate type demulsifier for crude oil three-recovery produced liquid, and preparation method thereof

A technology of sulfonate type demulsifier, which is applied in dehydration/demulsification by chemical method, petroleum industry, treatment of hydrocarbon oil, etc. It can solve problems such as difficulty in demulsification of stable crude oil emulsion, achieve elimination of interfacial tension gradient, increase Contact area, effect of weakening interfacial tension

Pending Publication Date: 2020-09-15
DESHI ENERGY TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a new type of demulsifier with fast dehydration speed and high dehydration rate, so as to solve the problem of difficult demulsification of stable crude oil emulsion caused by the three crude oil recovery technology in the prior art

Method used

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  • Sulfonate type demulsifier for crude oil three-recovery produced liquid, and preparation method thereof
  • Sulfonate type demulsifier for crude oil three-recovery produced liquid, and preparation method thereof
  • Sulfonate type demulsifier for crude oil three-recovery produced liquid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1 provides a kind of novel sulfonate type demulsifier, and this demulsifier is the polymer with following molecular formula:

[0094]

[0095] in:

[0096]

[0097] In the formula: m=m 1 +m 2 , and m 1 = m 2 =(m / 2),n=n 1 +n 2 , and n 1 =n 2 =(n / 2); the value of m is 80-110, the value of n is 30-60, and the molecular weight of the polymer is 6000-9000.

[0098] The above-mentioned sulfonate type demulsifier is represented by C-1, and its preparation method comprises the following steps:

[0099] (1) Synthesis of polyether intermediate polyether A-1:

[0100] Wash and dry the stainless steel reaction kettle, add 50kg of propylene glycol and 50kg of potassium hydroxide aqueous solution (potassium hydroxide: deionized water = 12.5kg: 37.5kg) to the dry and clean reaction kettle, heat up to 100 ° C ~ 120 ° C, stir After 30 minutes until the state is uniform, turn on the vacuum pump at 100°C-120°C for high-temperature vacuum dehydration for 2 hours ...

Embodiment 2

[0107] Embodiment 2 provides a kind of novel sulfonate type demulsifier, and this demulsifier is the polymer with following molecular formula:

[0108]

[0109] Among them, R has the following structure:

[0110]

[0111] In the formula: m=m 1 +m 2 +m 3 +m 4 , m 1 = m 2 = m 3 = m 4 =(m / 4);n=n 1 +n 2 +n 3 +n 4 , and n 1 =n 2 =n 3 =n 4 =(n / 4). The value of m is 80-110, the value of n is 30-60, and the molecular weight of the polymer is 6000-9000.

[0112] The above-mentioned sulfonate type demulsifier is represented by C-2, and its preparation method comprises the following steps:

[0113] (1) Synthesis of polyether intermediate polyether A-2:

[0114] Wash and dry the stainless steel reaction kettle, add 65kg of diethylenetriamine and 50kg of potassium hydroxide aqueous solution (potassium hydroxide: deionized water = 12.5kg: 37.5kg) to the dry and clean reaction kettle, and heat up to 100°C to 120°C ℃, stir for 30 minutes until the state is uniform, tu...

Embodiment 3

[0121] Embodiment 3 provides a kind of novel sulfonate type demulsifier, and this demulsifier is the polymer with following molecular formula:

[0122]

[0123] Among them, R has the following structure:

[0124]

[0125] In the formula: m=m 1 +m 2 , and m 1 = m 2 =(m / 2),n=n 1 +n 2 , and n 1 =n 2 =(n / 2); the value of m is 80-110, the value of n is 30-60, and the molecular weight of the polymer is 6000-9000.

[0126] The above-mentioned sulfonate type demulsifier is represented by C-3, and its preparation method comprises the following steps:

[0127] (1) Synthesis of polyether intermediate polyether A-3:

[0128] Wash and dry the stainless steel reaction kettle, add 80kg tert-butylphenol formaldehyde resin and 50kg potassium hydroxide aqueous solution (potassium hydroxide: deionized water = 12.5kg: 37.5kg) to the dry and clean reaction kettle, and heat up to 100°C ~120°C, stir for 30 minutes until the state is uniform, turn on the vacuum pump at 100°C~120°C for...

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Abstract

The invention provides a sulfonate type demulsifier for crude oil three-recovery produced liquid. A preparation method of the sulfonate type demulsifier comprises the following steps: (1) adding an initiator and a catalyst into a reaction kettle, and introducing epoxypropane and ethylene oxide to obtain polyether A; (2) adding polyether A and maleic anhydride into a reaction kettle, and carrying out a dehydration reaction to obtain an ester B; and (3) adding the ester B and a sulfonating agent into a reaction kettle, and performing a sulfonation modification to obtain the sulfonate type demulsifier. The sulfonate type demulsifier for the crude oil three-recovery produced liquid, provided by the invention, has relatively high surface activity, weakens the interfacial tension to a great extent, is adsorbed on an oil-water interface to cover more original film-forming substances, and eliminates the interfacial tension gradient effectively to make an original oil-water interface membrane broken and liquid in the membrane flow out and be gathered, so oil-water separation is realized, and the sulfonate type demulsifier has remarkable demulsification performance.

Description

technical field [0001] The application relates to the field of petrochemical technology, in particular to a sulfonate-type demulsifier for crude oil tertiary recovery fluid and a preparation method thereof. Background technique [0002] Crude oil demulsifier is an oilfield chemical agent for oil-water separation of petroleum production fluid, and it is one of the important links in the process of petroleum production and processing. The principle of demulsification is that the demulsifier goes deep into and adheres to the interface of the emulsified droplets, replaces the original emulsifier and destroys the surface film, releases the droplets encapsulated in the film and makes them coalesce, so that the two phases of oil and water occur. separate. In the process of oilfield exploitation, with the implementation of oil recovery technologies such as steam flooding, surfactants, polymers and three-component compound oil flooding, not only the water content in the crude oil em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04C10G2300/1033C10G2300/208
Inventor 崔仕章郭玉玺张向红王黎明宋新旺于长禄侯青怡吴艳青
Owner DESHI ENERGY TECH GRP CO LTD
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