Efficient composite hydrate anticoagulant

A compound type, hydrate technology, applied in other chemical processes, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of high cost, large consumption, high toxicity, etc., and achieve good effect, tight arrangement, The effect of emulsion stabilization

Inactive Publication Date: 2003-01-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of large consumption, high cost, difficult to recycle, and high toxicity of traditional inhibitors for preventing hydrate formation, and to provide a new high-efficiency inhibitor with less dosage, good effect and economical feasibility. Composite hydrate antipolymerization agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016]Sorbitan tristearate (Span-65) (its HLB is 2.1) and polyoxyethylene sorbitan tristearate (Tween-65) (its HLB is 10.5) according to the ratio of 75:25 The mass ratio is mixed to obtain the high-efficiency composite hydrate antipolymerization agent described in the present invention. The HLB value of the composite antipolymerization agent is 4.2.

[0017] In the reaction system, the amount of water added is 36ml, and the amount of nonane added is 86ml, that is, the volume ratio of water in the system is 30%. The amount of anti-polymerization agent added in the system was 0.4% (relative to the quality of water), and the experimental procedure was the same as above. After the reaction was completed, no coalesced hydrates were found to be generated in the kettle. Since the antipolymerization performance of the antipolymerization agent has a great relationship with the supercooling degree of the reaction system, if the supercooling degree of the system is too large, the antip...

Embodiment 2

[0019] Sorbitan tristearate (Span-65) (its HLB is 2.1) and polyoxyethylene sorbitan monolaurate (Tween-65) (its HLB is 13.3) are mixed according to the quality of 80:20 By mixing them together, the high-efficiency composite hydrate antipolymerization agent described in the present invention can be obtained. The HLB value of the composite antipolymerization agent is 4.4.

[0020] In the reaction system, the amount of water added is 36ml, and the amount of nonane added is 86ml, that is, the volume ratio of water in the system is 30%. The addition amount of the antipolymerization agent in the system is 0.6% (relative to the quality of water), and the experimental procedure is the same as above. After the reaction is completed, no coalesced hydrates are found to be generated in the kettle. The maximum subcooling degree that the antipolymerization agent can withstand is 9.6°C.

Embodiment 3

[0022] Glycerol monostearate (pure compound) (its HLB is 3.8) and polyoxyethylene (20) sorbitan tristearate (Emsorb 6907) (its HLB is 11) according to the quality of 76:24 By mixing them together, the high-efficiency composite hydrate antipolymerization agent described in the present invention can be obtained. The HLB value of the composite antipolymerization agent is 5.5.

[0023] In the reaction system, the amount of water added is 36ml, and the amount of nonane added is 86ml, that is, the volume ratio of water in the system is 30%. The addition of antipolymerization agent in the system is 0.6% (relative to the quality of water), and the experimental procedure is the same as above. After the reaction is completed, no coalesced hydrates are found to generate in the kettle. The maximum degree of supercooling that the antipolymerization agent can withstand is 10°C.

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Abstract

The efficient composite hydrate anticoagulant is prepared by mixing non-ionic surfactant fatty-acid ester of polyol and fatty-acid ester of PVA in the weight ratio of 50-80 to 20-50 or mixing non-ionic surfactant fatty-acid ester of polyol and anionic surfactant in the weight ratio of 60-80 to 20-40. In oil and gas conveying pipeline, the fluid contains great amount of water and water will be likely to react with C1-C4 alkane in some condition to produce hydrate to form pipeline blocking agglomeration. The present invention can prevent the agglomeration effectively to make the conveying efficient, low in power consumption and economic.

Description

(1) Technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a high-efficiency composite hydrate antipolymerization agent. (2) Background technology [0002] When gas exists, water or water dissolved in the oil phase can easily form ice-like crystalline hydrate with cage structure under certain temperature and pressure. Generally, natural gas hydrates can only be formed at temperatures below the freezing point, but as the pressure increases, hydrates can also be easily formed at temperatures above the freezing point. Formation of ethane hydrate within the range. The formation of hydrates has brought a lot of troubles to human beings, especially during offshore oil and gas exploration and transportation, because the extracted oil or natural gas contains a lot of water, when oil and gas reach the seabed or are transported along the seabed, the environment will be affected. There has been a sharp change in temperature—the...

Claims

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Application Information

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IPC IPC(8): C09K3/32F16L55/24
Inventor 徐勇军杨晓西丁静叶国兴
Owner SOUTH CHINA UNIV OF TECH
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