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Oil field scale prevention desulfurizing agent and preparing method thereof

A desulfurizer and anti-scaling technology, applied in the petroleum industry, treating hydrocarbon oil, refining hydrocarbon oil, etc., can solve problems such as calcium and magnesium ion deposition, achieve high-efficiency desulfurization effect, simple and controllable preparation method, and excellent anti-scaling performance. Effect

Active Publication Date: 2017-04-05
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the technical problem that triazine desulfurizers easily lead to the deposition of calcium and magnesium ions in oilfield fluid production during use, and provides an oilfield anti-scaling desulfurizer and a preparation method thereof. The phosphate functional group is introduced into its molecule, so that the target product not only has high-efficiency desulfurization performance, but also has good anti-fouling ability; its preparation method is simple and controllable, and is suitable for industrial production

Method used

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  • Oil field scale prevention desulfurizing agent and preparing method thereof
  • Oil field scale prevention desulfurizing agent and preparing method thereof

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Effect test

Embodiment 1

[0027] The synthesis of an oilfield anti-scaling and desulfurization agent is prepared from a main agent with a mass fraction of 70%, a modifier with a mass fraction of 5%, a synergist with a mass fraction of 5%, and a dispersant with a mass fraction of 20%. into, the synthesis steps are as follows:

[0028] (1) First add 305.4g of ethanolamine into the reaction kettle, stir and heat up to 65°C, add dropwise 405.8g of formaldehyde solution (chemically pure, with an effective mass percentage of 37%), dropwise for 1 hour, and control the temperature at 65-75°C; After the dropwise addition is completed, react at a temperature of 65-75°C for 3 hours, and then dehydrate under reduced pressure at -0.09~-0.1MPa and a temperature of 70-80°C for 5 hours to obtain the main ingredient;

[0029] The molar ratio of organic amine to formaldehyde is 1:1, and the molar ratio is calculated based on the effective mass percentage of formaldehyde in the formaldehyde solution.

[0030] (2) Take 1...

Embodiment 2

[0033] Synthesis of an oil field anti-scaling and desulfurization agent, which is made of a main agent with a mass fraction of 80%, a modifier with a mass fraction of 10%, a synergist with a mass fraction of 8%, and a dispersant with a mass fraction of 2%. , the synthesis steps are as follows:

[0034] (1) First add 610.8g of ethanolamine into the reaction kettle, stir and raise the temperature to 65°C, add dropwise 405.8g of formaldehyde solution (chemically pure, with an effective mass percentage of 37%), dropwise for 2 hours, and control the temperature at 65-75°C; After the dropwise addition is completed, react at a temperature of 65-75°C for 2 hours, then dehydrate under reduced pressure at -0.09~-0.1MPa and a temperature of 70-80°C for 5 hours to obtain the main ingredient of the product;

[0035] The molar ratio of organic amine to formaldehyde is 2:1, and the molar ratio is calculated based on the effective mass percentage of formaldehyde in the formaldehyde solution. ...

Embodiment 3

[0039] Synthesis of an oil field anti-scaling and desulfurization agent, which is made of a main agent with a mass fraction of 60%, a modifier with a mass fraction of 10%, a synergist with a mass fraction of 10%, and a dispersant with a mass fraction of 20% , the synthesis steps are as follows:

[0040] (1) First add 305.4g ethanolamine, 50.08g methylamine solution (chemically pure, effective mass percentage is 40%), and 20.05g ethylenediamine into the reactor, stir and heat up to 65°C, drop formaldehyde solution (chemically pure, effectively The mass percentage is 37%) 405.8g; the dropping time is 1.5h, and the temperature is controlled at 65-75°C. After the dropwise addition is completed, react at a temperature of 65-75°C for 1 hour, and then dehydrate under reduced pressure at -0.09~-0.1MPa and a temperature of 70-80°C for 5 hours to obtain the main ingredient of the product;

[0041] The molar ratio of organic amine to formaldehyde is 1.2:1, and the molar ratio is calcula...

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Abstract

The invention relates to the field of chemical desulphuration, and discloses an oil field scale prevention desulfurizing agent and a preparing method thereof. The oil field scale prevention desulfurizing agent is prepared in the manner that a modifying agent, a synergist and a dispersing agent are added in a main agent, and the main agent is obtained in the manner that organic amine and a formaldehyde solution serve as raw materials and are subjected to polymerization, dehydration and refining. The preparing method comprises the steps that the organic amine is stirred under a certain temperature condition, the formaldehyde solution is dripped, the temperature control reaction is conducted after dripping is finished, and the main agent is obtained after decompression dehydration under a certain vacuum degree and temperature condition; then the reaction temperature is controlled, and a modifying agent is dripped in the main agent, and the reaction is conducted; and finally, the synergist and the dispersing agent are sequentially added in a reaction product, and stirring is conducted till uniform mixing. The oil field scale prevention desulfurizing agent has a nitrogen-containing triazine structure, the efficient desulfuration effect can be guaranteed, the phosphate functional group is introduced in molecules, and meanwhile excellent scale prevention performance is achieved. Thus, the oil field scale prevention desulfurizing agent has good desulfuration and scale prevention performance at the same time, and the oil field scale prevention desulfurizing agent is suitable for the desulfuration process of oil field fluid production.

Description

technical field [0001] The invention relates to a liquid desulfurizer in the field of chemical desulfurization, in particular to an oil field anti-scaling desulfurizer and a preparation method thereof. Background technique [0002] In the process of oil and gas field development, crude oil is decomposed by microorganisms underground to produce hydrogen sulfide, and organic sulfur in crude oil can also produce hydrogen sulfide after high temperature or hydrothermal cracking. When crude oil is separated from gas, a large amount of hydrogen sulfide will enter the gas phase treatment system together with natural gas. Hydrogen sulfide is a highly toxic and irritating gas, which not only endangers the human body and pollutes the environment, but also causes serious corrosion to pipelines and related equipment. [0003] Adding liquid desulfurizer is an effective means to remove hydrogen sulfide. Compared with other liquid desulfurizers, triazine desulfurizers have 2 S has signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/20C10G75/04
CPCC10G29/20C10G75/04C10G2300/1033C10G2300/202
Inventor 胡廷王永军程艳郭晓男郭海军王磊逯学朝
Owner CHINA NAT OFFSHORE OIL CORP
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