Thick oil demulsifying agent and preparation method thereof

A technology of demulsifier and heavy oil, which is applied in the field of heavy oil demulsifier and its preparation, which can solve the problems affecting the exploitation and transportation of heavy oil, long dehydration time and high dehydration temperature, and achieve fast dehydration, high dehydration rate and easy diffusion Effect

Active Publication Date: 2014-07-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the heavy oil dehydration process has the characteristics of large dosage, high dehydration temperature, and long dehydration time, which have seriously affected the heavy oil production and export.

Method used

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  • Thick oil demulsifying agent and preparation method thereof
  • Thick oil demulsifying agent and preparation method thereof
  • Thick oil demulsifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the synthesis of demulsifier A

[0036] (1) Synthesis of polyether

[0037] Add 10 g of the above initiator and 5 g of KOH into the autoclave; seal the reactor system, and replace the air in the autoclave, feed tank and feed pipe with nitrogen. Stir and heat up. When the temperature rises to 100°C, slowly add 400g of propylene oxide to control the reaction temperature at 120°C and the pressure at 0.4Mpa. After reacting for 4 hours, aging for 1 hour and cooling down to 100°C. Then, 100 g of ethylene oxide was added into the feed tank, and the reaction was carried out at a temperature of 120° C. and a pressure of 0.4 MPa. After reacting for 2 hours, age for 1 hour to obtain polyether A, the structural formula of which is shown in Formula II, where m is 21 and n is 7.

[0038] In the above synthesis method, the mass ratio of initiator to epoxy compound is 1:50, the mass ratio of propylene oxide to ethylene oxide is 4:1, and the mass ratio of KOH to epoxy c...

Embodiment 2

[0045] Embodiment 2, the synthesis of demulsifier B

[0046] (1) Synthesis of polyether

[0047] 4g of the above starter and 2.5g of KOH were added to the autoclave; the reactor system was sealed, and the air in the autoclave, feed tank and feed pipe was replaced with nitrogen. Stir and heat up, when the temperature rises to 100°C, slowly add 300g of propylene oxide, control the reaction temperature at 140°C, and the pressure at 0.3Mpa. After reacting for 5 hours, aging for 1 hour and cooling down to 100°C. 100g of ethylene oxide was added into the feed tank, and the reaction was carried out at a temperature of 140°C and a pressure of 0.3Mpa. After reacting for 3 hours, age for 1 hour to obtain polyether B, the structural formula of which is shown in Formula II, wherein m is 40 and n is 18.

[0048] In the above synthesis method, the mass ratio of initiator to epoxy compound is 1:100, the mass ratio of propylene oxide to ethylene oxide is 3:1, and the mass ratio of KOH to epo...

Embodiment 3

[0055] Embodiment 3, the synthesis of demulsifier C

[0056] (1) Synthesis of polyether

[0057] Add 1 g of the above initiator and 1 g of KOH to the autoclave; seal the autoclave system, and replace the air in the autoclave, feed tank, and feed pipe with nitrogen. Stir and heat up, when the temperature rises to 100°C, slowly add 100g of propylene oxide, control the reaction temperature at 130°C, and the pressure at 0.2Mpa. After 4 hours of reaction, it was aged for 1 hour, and the temperature was lowered to 100°C. 100g of ethylene oxide was added into the feed tank, and the reaction was carried out at a temperature of 130°C and a pressure of 0.2Mpa. After reacting for 6 hours, age for 1 hour to obtain polyether C, whose structural formula is shown in Formula II, wherein m is 54 and n is 72.

[0058] In the above synthesis method, the mass ratio of initiator to epoxy compound is 1:200, the mass ratio of propylene oxide to ethylene oxide is 1:1, and the mass ratio of KOH to ...

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Abstract

The invention relates to a thick oil demulsifying agent and a preparation method thereof, and belongs to the technical field of petroleum processing. The thick oil demulsifying agent is a compound which is obtained in such a way that the N-alkylates of triethanolamine and melamine are taken as initiating agents to successively generate oxyalkylation reaction with epoxy propane and epoxy ethane to generate polyether, are crosslinked through methylbenzene 2,4-diisocyanate to obtain polyurethane and then esterified and blocked through benzoyl chloride. The thick oil demulsifying agent disclosed by the invention has a good dehydration effect on thick oil and can be widely applied to the fields of crude oil exploitation, petroleum refining and the like.

Description

technical field [0001] The invention relates to a heavy oil demulsifier and a preparation method thereof, belonging to the technical field of petroleum processing. Background technique [0002] Economic globalization is a major trend in today's world economic development, and economic globalization is closely related to the national oil security strategy. In today's international arena, competition in the oil sector goes far beyond general commerce. Today, with the rapid development of the world economy, human beings are becoming more and more dependent on the products produced with petroleum as the basic raw material. Oil resources in the Asia-Pacific region where my country is located are particularly tense. Almost all the oilfields around the world go through the water-bearing development period, and about 80% of the world's crude oil production fluids exist in the form of emulsions. [0003] The demulsification and dehydration of crude oil emulsion is one of the impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G18/50C08G65/26C10G33/04
CPCC08G18/5063C08G18/831C08G65/263C10G33/04
Inventor 檀国荣张健靖波翟磊陈文娟朱玥珺赵文森
Owner CHINA NAT OFFSHORE OIL CORP
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