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Efficient defoaming agent and preparation method thereof

A defoamer, high-efficiency technology, applied in the direction of separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve the problems that cannot meet the production needs of oilfields, have not yet formed industrial production, poor foam suppression effect, etc., and achieve production costs Low, widely used, good defoaming effect

Inactive Publication Date: 2016-12-07
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the defoamers used at this stage are polysiloxane defoamers. Although this type of defoamer has a certain defoaming effect, its foam suppression effect is poor, and there are disadvantages such as large amount of use.
In addition, although there are related literature reports on polyether-organic silicon defoamers in China, they cannot effectively suppress foam, and have not yet formed industrial production, which cannot meet the current production needs of oil fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add 40 grams of oligosiloxane and 2 grams of molecular sieve-sulfuric acid into a reactor with stirring, dropping device and condenser, and dissolve 20 grams of block polyoxyethylene polyoxypropylene with a molecular weight of 1000 with 15 grams of toluene Ether (manufacturer: Jurong Ningwu New Material Co., Ltd.) formed a polyether solution, which was added dropwise into the reactor under stirring at 80°C, and reacted for 6 hours to obtain a crude product.

[0020] 2) Add 12 grams of isopropanol to dissolve the crude product, stir for 1 hour and let it stand, filter to remove impurities, and then distill under reduced pressure to remove the solvent to obtain the high-efficiency defoamer H902-1. 89

Embodiment 2

[0022] 1) Add 45 grams of oligosiloxane and 1.4 grams of molecular sieve-trifluoroacetic acid into a reactor with stirring, dropping device and condenser, and dissolve 18 grams of polyoxypropylene ether with a molecular weight of 1500 with 12 grams of isopropanol (Manufacturer: Jurong Ningwu New Material Co., Ltd.) to form a polyether solution, which was added dropwise into the reactor under stirring at 80° C., and reacted for 5 hours to obtain a crude product.

[0023] 2) Add 15 grams of isopropanol to dissolve the crude product, stir for 2 hours, let it stand, filter to remove impurities, and then distill under reduced pressure to remove the solvent to obtain high-efficiency defoamer H902-2. 91.4

Embodiment 3

[0025] 1) 45 grams of oligosiloxane and 3 grams of molecular sieve-hydrochloric acid are added in the reactor with stirring, dripping device and condenser tube, and 25 grams of polyoxypropylene ether of molecular weight 2400 are dissolved with 17 grams of methanol (manufacturer: Jurong Ningwu New Material Co., Ltd.) to form a polyether solution, which was added dropwise into the reactor under stirring at 50°C, and reacted for 3 hours to obtain a crude product.

[0026] 2) Add 15 grams of isopropanol to dissolve the crude product, stir for 1 hour, let it stand, filter to remove impurities, and then distill under reduced pressure to remove the solvent to obtain the high-efficiency defoamer H902-3.

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PUM

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Abstract

The invention discloses an efficient defoaming agent, and belongs to the field of chemical materials. The efficient defoaming agent is prepared from the following components in percentage by weight: 20 to 50 percent of industrial polyether with the molecular weight of 800 to 4,000, 30 to 60 percent of hydroxyl silicone oil, 0.9 to 3 percent of a composite catalyst and the balance of a solvent. The industrial polyether and a hydroxyl terminal of hydroxyl silicone oil generate condensation reaction to obtain the polyether-organic silicon defoaming agent which is good in defoaming effect and has good inhibition effect on foams. The invention further discloses a preparation method of the efficient defoaming agent.

Description

technical field [0001] The invention relates to a defoamer, in particular to a high-efficiency defoamer for eliminating foam generated in the crude oil exploitation process and a preparation method thereof, belonging to the field of chemical materials. Background technique [0002] At present, major oil fields have successively entered the late stage of secondary oil recovery and the early stage of tertiary oil recovery. With the implementation of various production increase measures, especially the oil recovery of ASP flooding, a large amount of foam will be generated in the produced fluid. If these foams are not eliminated in time, the oil recovery rate will be greatly reduced, the production cost will be increased, and unnecessary troubles will be caused to the follow-up treatment of the crude oil emulsion. Most of the defoamers used at this stage are polysiloxane defoamers. Although this type of defoamer has a certain defoaming effect, its foam suppression effect is poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 应珏李怀阁翟洪金陈杰倪小明许家鹏
Owner JURONG NINGWU CHEM