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Non-ionic compound hydrate anti-agglomerant

A technology of anti-polymerization agent and hydrate, applied in the field of hydrate anti-polymerization agent, inhibiting hydrate accumulation, and non-ionic composite hydrate anti-polymerizing agent, which can solve the problems of high consumption, high cost, high toxicity, etc. Less dosage, good effect, and the effect of solving the problem of flow safety

Inactive Publication Date: 2014-06-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a new type of high-efficiency hydrate antipolymerization agent for the defects of high consumption, high cost, and high toxicity of traditional hydrate antipolymerization agents. Composed of oxyethylene dicarboxylate-based gemini nonionic surfactant and polyol-type nonionic surfactant, the antipolymerization agent has the advantages of less dosage, good effect, non-toxicity, and economical feasibility.

Method used

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  • Non-ionic compound hydrate anti-agglomerant
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  • Non-ionic compound hydrate anti-agglomerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The antipolymerization agent provided in this example is obtained by mixing polyoxyethylene dicarboxylate type gemini nonionic surfactant with the following structure and Span-20 polyol type nonionic surfactant in a mass ratio of 1:1 .

[0042]

[0043] The oil-water emulsion of the oil-gas-water mixed transportation system is prepared from 1.0mL deionized water and 9.0mL diesel oil, that is, the volume content of water in the oil-gas-water mixed transportation system is 10% (based on the volume of water and oil The sum of the volumes is the basis for calculation), the total amount of the antipolymerization agent added is 3.0wt% (relative to the mass content of water, the same below), the composition of the gas introduced is shown in Table 1, and the test steps are similar to the visual transparent sapphire high-pressure reactor The evaluation process is the same.

[0044] The test procedure is as described above. During the whole test process, the hydrate formed a ...

Embodiment 2

[0046] The present embodiment provides a kind of antipolymerization agent, and the polyoxyethylene dicarboxylate type gemini nonionic surfactant and Span-20 polyol type nonionic surfactant that it adopts are identical with embodiment 1, both The mass ratio is 2:1, the volume content of water in the oil-gas-water mixed transportation system is 10% (based on the sum of the volumes of water and oil), and the total amount of antipolymerization agent added is 3.0% (calculated based on the volume of oil - the mass meter of water in the air-water mixed transport system).

[0047] After the test, the hydrate in the sapphire kettle formed a milky form and did not accumulate and agglomerate, indicating that the anti-aggregation agent provided in this example has the same good hydrate anti-aggregation effect as the anti-aggregation agent in Example 1.

Embodiment 3

[0049] The present embodiment provides a kind of antipolymerization agent, and the polyoxyethylene dicarboxylate type gemini nonionic surfactant and Span-20 polyol type nonionic surfactant that it adopts are identical with embodiment 1, both The mass ratio is 4:1, the volume content of water in the mixed transportation system is 10% (calculated based on the sum of the volumes of water and oil), and the total amount of antipolymerization agent added is 3.0% (calculated based on the mass of water).

[0050] After the test, the hydrate in the sapphire kettle formed a milky form and did not accumulate and agglomerate, indicating that the anti-aggregation agent provided in this example has the same good hydrate anti-aggregation effect as the anti-aggregation agent in Example 1.

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Abstract

The present invention relates to a non-ionic compound hydrate anti-agglomerant which is composed of polyoxyethylene dicarboxylic acid esters twin non-ionic surfactants and polyalcohol nonionic surfactants. Compared with a present hydrate anti-agglomerant, according to the non-ionic compound hydrate anti-agglomerant provided in the invention, realization of hydrate dynamic control technology is facilitated, that hydrate crystal exists in a pipe of an oil - gas - water multiphase mixed transportation pipeline in the shape of small particles is ensured, accumulation and deposition phenomena are avoided, and a flow security problem of the multiphase mixed transportation pipeline is effectively solved. The anti-agglomerant has the characteristics of less dosage, good effect, non-toxicity, being economical, environmental protection and the like.

Description

technical field [0001] The invention relates to a hydrate antipolymerization agent, in particular to a nonionic composite hydrate antipolymerization agent. The invention also relates to a method for suppressing hydrate accumulation in a transportation system by using the antipolymerization agent, which belongs to the field of oil and gas transportation. Background technique [0002] Some low-boiling hydrocarbons such as methane, ethane, propane, n-butane, isobutane, etc. are substances that exist in oil or natural gas. These substances can combine with water in oil and gas. Under certain conditions (a It is a low temperature and high pressure condition) to form gas hydrate. Gas hydrate is a cage-like crystal substance, and its cage structure is composed of host molecules and guest molecules. The water molecules that form hydrates are called hosts, and the other components that form hydrates are called guests. A strand of natural gas hydrate can only be formed at a temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/42F17D1/17C09K23/42
Inventor 陈光进李文志李清平孙长宇穆亮彭宝仔陈俊
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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