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Preparation method of novel polymerized triazine derivative desulfurizing agent

A technology of triazine derivatives and desulfurizers, which is applied in the chemical industry, can solve problems such as scaling, sedimentation and pipe plugging, and achieve the effects of increasing desulfurization rate, increasing desulfurization efficiency, and enhancing desulfurization temperature adaptability

Active Publication Date: 2021-01-05
成都孚吉科技有限责任公司
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Problems solved by technology

However, when hexahydro-s-triazine is used on site, serious precipitation and pipe plugging will occur. The main reason is that after the reaction of hexahydro-s-triazine with hydrogen sulfide, 3,5-bis(2-hydroxyethyl)-1 , Both 3,5-dithiazine and 5-hydroxyethyl dithiazine are soluble in water, but at the same time the product is monoethanol, which is an organic alcohol amine, which will obviously increase the pH value of the solution after a large amount of accumulation , leading to fouling

Method used

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  • Preparation method of novel polymerized triazine derivative desulfurizing agent
  • Preparation method of novel polymerized triazine derivative desulfurizing agent
  • Preparation method of novel polymerized triazine derivative desulfurizing agent

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preparation example Construction

[0018] Such as figure 1 Shown, a kind of preparation method of new polymerization triazine derivative desulfurizer comprises the following steps:

[0019] S1: Add a certain amount of ethanol, formaldehyde and 2-aminoethanol to the reaction kettle, and react at 0°C for a period of time to synthesize hydroxyethylhexahydro-s-triazine;

[0020] S2: Add a certain amount of ethanol, ethylene oxide, hydroxyethylhexahydro-s-triazine and potassium hydroxide prepared in step S1 to another reaction kettle, raise the temperature to 120°C, and continue under the catalytic action of potassium hydroxide After reacting for a period of time, the target desulfurizer can be obtained.

[0021] Preparation of hydroxyethylhexahydro-s-triazine:

[0022] Add 5mol of formaldehyde, 5mol of 2-aminoethanol and 200ml of ethanol into the reaction kettle, stir, react at 0°C for 2h, keep warm for 1h, separate and purify to obtain hydroxyethylhexahydro-s-triazine.

Embodiment 1

[0024] Add 100ml of ethanol to the reaction kettle as a solvent, add 1mol of prepared hydroxyethylhexahydro-s-triazine, 0.1mol of ethylene oxide and 0.5mol of potassium hydroxide, stir, raise the temperature to 120°C, and react for 3 hours to obtain the target desulfurizer .

Embodiment 2

[0026] Add 100ml of ethanol into the reaction kettle as a solvent, add 1mol of prepared hydroxyethylhexahydro-s-triazine, 0.3mol of ethylene oxide and 1mol of potassium hydroxide, stir, raise the temperature to 120°C, and react for 3 hours to obtain the target desulfurizer.

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Abstract

The invention relates to a preparation method of a novel polymerized triazine derivative desulfurizing agent. On the basis of hydroxyethyl hexahydros-triazine, ethylene oxide is utilized for modification to generate long-chain polyether substances with favorable water solubility instead of short-chain monoethanolamine after desulfurization, due to the existence of the long-chain polyether substance with good water solubility, not only is the scaling trend not increased, but also the long-chain polyether substance can be used as an excellent penetrant, the dissolution rate of hydrogen sulfide and the mass transfer rate of hydrogen sulfide in a solution are remarkably increased, the desulfurization reaction is promoted, and the long-chain polyether substance is more environment-friendly andreliable than a traditional desulfurizing agent; and the modified desulfurizing agent is more stable in an acid environment, the hydrolysis ring opening speed is reduced, the efficient stability can be kept for a long time, and the desulfurizing temperature adaptability is further enhanced.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of a novel polymerized triazine derivative desulfurizer. Background technique [0002] Hexahydro-s-triazine is a commonly used desulfurization agent with high desulfurization efficiency, advantages in thermal stability and desulfurization ability, and can selectively remove hydrogen sulfide in a carbon dioxide environment. It is a suitable oil and gas field site Added desulfurizer. However, when hexahydro-s-triazine is used on site, serious precipitation and pipe plugging will occur. The main reason is that after the reaction of hexahydro-s-triazine with hydrogen sulfide, 3,5-bis(2-hydroxyethyl)-1 , Both 3,5-dithiazine and 5-hydroxyethyl dithiazine are soluble in water, but at the same time the product is monoethanol, which is an organic alcohol amine, which will obviously increase the pH value of the solution after a large amount of accumulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28B01D53/52
CPCC08G65/263B01D53/52
Inventor 刘伟王贵生戚杰徐伟峰吴伟然潘东弟王厦姜维韩蕾姚仕国陈蓉跃马源孟楠武鑫华邓明任莉
Owner 成都孚吉科技有限责任公司
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