Preparation method and application of polyether type thick oil demulsifying agent

A polyether-type, demulsifier technology is applied in the preparation of ether, dehydration/demulsification by chemical methods, dehydration of hydroxyl-containing compounds to prepare ether, etc. It can solve the problems of high production cost, carcinogenicity, flammable and explosive raw materials, etc. Achieve good economic benefits and low cost of raw materials

Inactive Publication Date: 2012-10-03
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of demulsifier has problems such as high production cost, flammable, explosive and toxic raw materials, especially the more active chemical properties of ethylene oxide, which has carcinogenic effect

Method used

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  • Preparation method and application of polyether type thick oil demulsifying agent
  • Preparation method and application of polyether type thick oil demulsifying agent
  • Preparation method and application of polyether type thick oil demulsifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Synthesis of polyglycerol

[0048] In a four-necked flask equipped with a water separator, a thermometer, and a stirrer, add 150 g of glycerin and 4.5 g of powdered sodium hydroxide, and raise the temperature to 250 ° C by passing nitrogen gas. Glycerol, the degree of polymerization is 2-12. After the reaction, vacuumize 133.3KPa at 250°C for 0.5h, cool down to 90°C, add acetic acid to neutralize the catalyst, make the pH of the polyglycerol product 7, separate and purify, Prepare polyglycerol for use;

[0049] (2) Synthesis of polyether and preparation of polyether heavy oil demulsifier

[0050] Add 50g of tetrapolyglycerol as the raw material and 2.5g of catalyst potassium hydroxide into the autoclave; replace the air in the reactor with nitrogen, turn on the stirrer, keep the speed at 150 rpm, and heat the reactor to 100°C; after the temperature is constant, start dripping Add propylene oxide, the mass ratio of polyglycerol to propylene oxide is 1:2; the catalyst...

Embodiment 2

[0051] Example 2 Synthesis of polyether and preparation of polyether type heavy oil demulsifier

[0052] Add 50 g of decaglycerol as starter and 1.5 g of potassium hydroxide catalyst into the autoclave; replace the air in the reactor with nitrogen, turn on the stirrer, keep the speed at 150 rpm, and heat the reactor to 100°C; after the temperature is constant, Start to add propylene oxide dropwise, the molar ratio of polyglycerol to propylene oxide is 1:3; the catalyst accounts for 3% by weight of the starting material, and the reactor pressure is kept at Between 0.2-0.4MPa, the reaction temperature is between 110-140°C. A total of 100 g of propylene oxide was added, and after the pressure of the reactor dropped, the reaction was continued at this temperature for 60 minutes to complete the reaction, and the residual monomer was absorbed by decompression. After cooling down, open the kettle and take out the product. Add 100 g of the obtained polyether and 150 g of toluene int...

Embodiment 3

[0053] Example 3 Synthesis of polyether and preparation of polyether type viscous oil demulsifier

[0054] Add 50 g of decaglycerin as raw material and 1.5 g of catalyst potassium hydroxide into the autoclave; replace the air in the reactor with nitrogen, turn on the stirrer, keep the speed at 150 rpm, and heat the reactor to 100°C; after the temperature is constant, start dripping Add propylene oxide, the molar ratio of polyglycerol to propylene oxide is 1:3; the catalyst accounts for 3% by weight of the starting material, and the pressure of the reactor is kept at 0.2- Between 0.4MPa and the reaction temperature between 110-140°C. A total of 150 g of propylene oxide was added, and after the pressure of the reactor dropped, the reaction was continued at this temperature for 60 minutes to complete the reaction, and the residual monomer was absorbed by decompression. After cooling down, open the kettle and take out the product. Add 100 g of the obtained polyether and 150 g of...

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Abstract

The invention relates to a preparation method and an application of a polyether type thick oil demulsifying agent. The method comprises the steps of polyglycerol synthesis, polyether synthesis and polyether type thick oil demulsifying agent preparation. The thick oil demulsifying agent adopts polyglycerol with different polymerization degrees as initiators, alkali metal hydroxide is used as catalysts, epoxypropane polymerization is initiated, polyether macromolecular compounds are obtained, then, the polyether macromolecular compounds take reaction with polyisocyanate in aromatic solvents, and the final demulsifying agent product is obtained. The detail method steps are shown as the specification. The preparation method and the application have the advantages that by-product glycerol generated in the biodiesel production process is used as raw materials, ethylene oxide used as synthesis raw materials of the polyether type demulsifying agent is replaced, the raw material cost is low, the production risk is low, the thick oil demulsifying effect is good, and the preparation method is particularly suitable for thick oil dehydration at lower temperature, and the utilization rate of the glycerol can be greatly improved, so the development of the biodiesel industry is promoted.

Description

technical field [0001] The invention relates to a preparation method of a demulsifier, in particular to a preparation method and application of a polyether type viscous oil demulsifier. Background technique [0002] my country has abundant heavy oil resources, and the annual output of heavy oil has reached more than 10 million tons, which has made an important contribution to alleviating the tight oil supply and demand in my country. However, since most oil fields have entered the middle and late stage of production, the water content of the produced fluid is very high, and the heavy oil contains high natural interface active substances such as colloid and asphaltene, resulting in high viscosity and poor fluidity of the crude oil emulsion. The strength of the oil-water interface film increases, the water droplets are difficult to coalesce, and the demulsification and dehydration are difficult. At present, thermochemical or electrochemical demulsification dehydration technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G65/28C08G65/34C07C43/13C07C41/09C10G33/04
Inventor 慕朝赵如松沈国华舒文华武继辉佟啦嘎王亚洲陈伟刘同建张强邹小勇
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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