Low-temperature demulsifier for thick oil and preparation method of low-temperature demulsifier

A demulsifier and low-temperature technology, applied in the field of low-temperature demulsifier and its preparation, can solve the problems of increased production cost and heating energy consumption, and achieve the effects of low concentration, strong adaptability and simple synthesis process

Pending Publication Date: 2021-10-08
北京安德兴石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heating energy consumption in the demulsification and dehydration process continues to rise, and the production cost increases significantly

Method used

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  • Low-temperature demulsifier for thick oil and preparation method of low-temperature demulsifier
  • Low-temperature demulsifier for thick oil and preparation method of low-temperature demulsifier
  • Low-temperature demulsifier for thick oil and preparation method of low-temperature demulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) In the three-necked flask with a swiveling thermometer, a stirrer and a reflux condenser, add 1 mol of hydrogen-containing silicone oil, 0.1 mol of methyl-terminated allyl polyoxyethylene polyoxypropylene ether and 2 mol of solvent isopropanol in sequence, and feed Nitrogen protection, then slowly increase the temperature to 80°C, after the temperature rises stably, add the catalyst chloroplatinic acid dropwise, after constant temperature for 1h, the reaction ends, and the mixture is obtained;

[0031] (2) Distill the above mixture under reduced pressure to remove the solvent isopropanol, then wash it with ethanol for 3 times, then put it in an oven at 80°C to remove the residual ethanol and solvent isopropanol, and obtain low-temperature demulsifier A 1 .

[0032] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil with a Si-H mass fraction of 0.3-1%.

[0033] The dropping rate of the catalyst chloroplatinic acid is 10 drops / min, and the dos...

Embodiment 2

[0043] (1) In the three-necked flask of the swiveling thermometer, the stirrer and the reflux condenser, add 1mol of hydrogen-containing silicone oil, 0.3mol of methyl-terminated allyl polyoxyethylene polyoxypropylene ether and 3mol of solvent cyclohexanone in turn, and feed Nitrogen protection, then slowly raise the temperature to 85°C, after the temperature rise is stable, the catalyst chloroplatinic acid is added dropwise, and the reaction ends after constant temperature for 2 hours, and the mixture is obtained;

[0044] (2) Distill the above mixture under reduced pressure to remove the solvent cyclohexanone, then wash it with ethanol for 3 times, then put it in an oven at 80°C to remove the residual ethanol and solvent cyclohexanone, and obtain low-temperature demulsifier A 2 .

[0045] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil with a Si-H mass fraction of 0.3-1%.

[0046] The catalyst is chloroplatinic acid, the dropping rate is 15 drops / ...

Embodiment 3

[0056] (1) In the three-necked flask with a wandering thermometer, a stirrer and a reflux condenser, add 1 mol of hydrogen-containing silicone oil, 0.5 mol of methyl-terminated allyl polyoxyethylene polyoxypropylene ether and 4 mol of solvent isopropanol in sequence, and feed Nitrogen protection, then slowly raise the temperature to 90°C, after the temperature rise is stable, the catalyst chloroplatinic acid is added dropwise, the reaction ends after constant temperature for 3 hours, and the mixture is obtained;

[0057] (2) Distill the above mixture under reduced pressure to remove the solvent isopropanol, then wash it with ethanol for 4 times, and then put it in an oven at 80°C to remove the residual ethanol and solvent isopropanol to obtain low-temperature demulsifier A 3 .

[0058] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil with a Si-H mass fraction of 0.3-1%.

[0059] The catalyst is chloroplatinic acid, the dropping rate is 12 drops / min, ...

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Abstract

The invention relates to an additive used in the technical field of thick oil gathering and transportation, in particular to a low-temperature demulsifier for thick oil and a preparation method of the low-temperature demulsifier. The demulsifier is generated by reaction of hydrogen-containing silicone oil and methyl-terminated allyl polyoxyethylene polyoxypropylene ether under the action of a catalyst. The molar ratio of the hydrogen-containing silicone oil to the methyl-terminated allyl polyoxyethylene polyoxypropylene ether is 1: (0.1-1), preferably 1: (0.5-0.7). The demulsifier has the characteristics of simple synthesis process, low cost, strong adaptability and high low-temperature demulsification rate, and the demulsification rate of the demulsifier on oil field heavy oil reservoir produced liquid at the temperature of 50 DEG C or above and the concentration of 50 ppm reaches 98.5% or above. Meanwhile, the low-temperature demulsifier is wide in raw material source, simple in synthesis process, high in adaptability and small in dosage, and can meet the requirements of environmental protection and oilfield development.

Description

technical field [0001] The invention relates to an additive used in the technical field of heavy oil gathering and transportation, in particular to a low-temperature demulsifier used for heavy oil and a preparation method thereof. Background technique [0002] Crude oil demulsifier is an essential chemical reagent for the dehydration of crude oil in combined stations and refineries. As the major oil fields enter the production period with high water content, the water content of crude oil increases year by year. The use of tertiary oil recovery technology, heavy oil recovery technology and various production stimulation measures has resulted in more and more complex properties of produced fluids, enhanced stability of crude oil emulsions, and increased difficulty in demulsification and dehydration. Heavy oil has high viscosity, and chemical dehydration is more difficult than thin oil, and conventional demulsifiers have poor effect on low-temperature dehydration of heavy oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G77/46
CPCC10G33/04C08G77/46
Inventor 田春来刘达李燕王凯侯玉虹骆世通
Owner 北京安德兴石油技术有限公司
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