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Demulsifier for oil-water transition layer rich in polymers and colloid asphaltene in crude oil dehydration system and preparation method of oil-water transition layer demulsifying agent

A crude oil dehydration and demulsifier technology, applied in the direction of chemical dehydration/demulsification, etc., can solve problems such as excessive water content of oil products, disorder of dehydration system, environmental pollution, etc., and achieve safe use, flexibility and good wettability. , the effect of easy availability of raw materials

Pending Publication Date: 2022-02-11
盘锦富隆化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it solves the disorder of the dehydration system caused by the continuous accumulation and thickening of the oil-water transition layer and the resulting water content of the oil exceeds the standard. On the other hand, it solves the problem of environmental pollution caused by direct discharge due to the ineffective treatment of the transition layer

Method used

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  • Demulsifier for oil-water transition layer rich in polymers and colloid asphaltene in crude oil dehydration system and preparation method of oil-water transition layer demulsifying agent
  • Demulsifier for oil-water transition layer rich in polymers and colloid asphaltene in crude oil dehydration system and preparation method of oil-water transition layer demulsifying agent
  • Demulsifier for oil-water transition layer rich in polymers and colloid asphaltene in crude oil dehydration system and preparation method of oil-water transition layer demulsifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0043] 1. Preparation of Oil Head YPAE1

[0044]According to the mass ratio, tetraethylenepentamine: propylene oxide = 1: 199, first put a specified amount of tetraethylenepentamine into the reactor, heat up to 88-90°C, use nitrogen to bubble from the bottom of the reactor for 1 hour and measure Water content, and then measure the water content every half an hour until the water content is less than 0.03%, vacuumize, when the pressure in the reactor is -0.09~-0.08MPa, first introduce tetraethylene five-thirds of the mass of epoxy Propane, then raise the temperature to 99~105℃, keep the reaction pressure at 0.4~0.5MPa, when the pressure drops to 0.02MPa, then feed the remaining amount of propylene oxide, the reaction pressure is 0.4~0.5MPa, and the reaction temperature is 125~ 135°C, when the pressure drops to 0.02MPa, keep it warm for half an hour, and then cool down to 80°C to get YPAE1 oil head.

[0045] 2. Preparation of Demulsifier DPAE1

[0046] According to the mass ra...

Embodiment approach 2

[0059] 1. Preparation of Oil Head YPAE2

[0060] According to the mass ratio, mannitol: propylene oxide=1: 299, first put the prescribed amount of mannitol into the reactor, heat up to 88-90°C, use nitrogen to bubble from the bottom of the reactor for 1 hour and measure the water content, and then Bubble for half an hour to measure the water content, until the water content is less than 0.03%, vacuumize, when the pressure in the reactor is -0.09~-0.08MPa, first pass propylene oxide with one-third of the mass of mannitol, and then heat up to 99 ~ 105°C, keep the reaction pressure at 0.4 ~ 0.5MPa, when the pressure drops to 0.02MPa, then feed the remaining amount of propylene oxide, the reaction pressure is 0.4 ~ 0.5MPa, the reaction temperature is 125 ~ 135°C, when the pressure drops When it reaches 0.02MPa, keep it warm for half an hour, then cool down to 80°C to get YPAE2 oil head.

[0061] 2. Preparation of demulsifier DPAE2

[0062] According to the mass ratio, YPAE2: eth...

Embodiment approach 3

[0075] 1. Preparation of oil head YPAE3

[0076] According to the mass ratio, ethyl hydrogen-containing silicone oil: propylene oxide = 1:399, first put a specified amount of ethyl hydrogen-containing silicone oil into the reactor, raise the temperature to 88-90°C, and bubble nitrogen from the bottom of the reactor for 1 hour And measure the water content, and then measure the water content every half an hour until the water content is less than 0.03%, vacuumize, when the pressure in the reactor is -0.09~-0.08MPa, first pass one-third of the mass of ethyl hydrogen-containing silicone oil One propylene oxide, then heat up to 99-105°C, keep the reaction pressure at 0.4-0.5MPa, when the pressure drops to 0.02MPa, then feed the remaining amount of propylene oxide, the pressure should be 0.4-0.5MPa, the reaction The temperature is 125-135°C. When the pressure drops to 0.02MPa, keep the heat for half an hour, and then lower the temperature to 80°C to obtain the YPAE3 oil head.

[0...

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Abstract

The invention provides a demulsifier for an oil-water transition layer rich in polymers and colloid asphaltene in a crude oil dehydration system and a preparation method of the demulsifier. The demulsifier DSR is composed of three components, one component is a star-tree-shaped triblock demulsifier SR with polyhydroxy ester as a core, the other component is commercial sodium diacetate, the third component is commercial alkyl ether sulfate, and the mass ratio of SR to sodium diacetate to alkyl ether sulfate is (15-30):(1-3):(0.5-2). Molecules of the demulsifier disclosed by the invention have high spatial extension and bidirectional diffusion effects and excellent coalescence capability, and the demulsifier can be used for quickly and deeply demulsifying oil-water transition layers rich in polymers and colloid asphaltene in a crude oil dehydration system through a thermal-chemical process, so that oil-water-residue (including polymers) three-phase effective separation is realized.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical preparations, and in particular relates to a demulsifier for polymer-rich and colloid-rich asphaltene-rich oil-water layers in a crude oil dehydration system and a preparation method thereof. Background technique [0002] The oil-water demulsification in the crude oil dehydration system is an urgent problem to be solved at present. Its causes are complicated. It is generally believed that it is due to the large use of incompatible chemicals, mechanical impurities and bacterial metabolites contained in the oil, and recovery of aging oil. result of a combination of factors. Its composition is complex. Observing under a high-power microscope, it can be found that part of the oil-water transition layer is in the form of a W / O / W or O / W / O trap and a part is in the state of O / W. The water content of the transition layer is usually stable at 45-85. %, through chemical analysis, it can be seen t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 胡毓桓李昕蔡立新
Owner 盘锦富隆化工有限公司
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