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Emulsion type silicone modified castor oil polyether defoamer and preparation method thereof

A technology of polyether defoamer and castor oil, which is applied in the field of emulsion-type silicone modified castor oil polyether defoamer and its preparation, which can solve the difficulties of polyether preparation, the reduction of defoaming performance, the oxidation of polyether chains, etc. problems, to achieve the effect of strong anti-foaming ability, fast defoaming speed and improved selectivity

Inactive Publication Date: 2019-01-11
XIAN SUNY FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They are often complex in process, and the preparation and operation of polyether are difficult, and the polyether chain is also prone to oxidation and chain scission in the air, and the conventional silicone-modified polyether has strong hydrophobicity, difficult emulsification, and is easy to use when used. Demulsification, resulting in greatly reduced defoaming performance

Method used

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  • Emulsion type silicone modified castor oil polyether defoamer and preparation method thereof
  • Emulsion type silicone modified castor oil polyether defoamer and preparation method thereof
  • Emulsion type silicone modified castor oil polyether defoamer and preparation method thereof

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preparation example Construction

[0031] The preparation method of emulsion type organosilicon modified castor oil polyether defoamer of the present invention comprises the steps:

[0032] 1) Put the castor oil in the autoclave, add 0.05%-0.3% basic catalyst (one or more of KOH, sodium methylate, potassium methylate or alkyllithium, calculated according to the quality of castor oil), stir Raise the temperature to 105-120°C, and evacuate to ≤-0.095MPa, rise to the set 120-160°C, and the reaction time is 2-5h. After the reaction, the degassing negative pressure is ≤-0.075MPa, stop vacuuming, and feed Epoxy compounds with a molar ratio of 1:20-80 to castor oil (one or two mixtures of ethylene oxide and propylene oxide, the amount added is 20-80 epoxy groups based on the number of epoxy groups) base), and heated up to react for a certain period of time, and degassed under negative pressure after the reaction was completed to obtain castor oil polyether;

[0033] 2) Put castor oil polyether with a molar ratio of 1...

Embodiment 1

[0041] Put castor oil in a 2.5L autoclave, add 0.15% KOH (calculated by the mass of castor oil), stir and heat up, and vacuumize, rise to 110 ° C, stop vacuuming, feed and castor oil molar ratio is 1 : Ethylene oxide at 60°C and heated up to 130°C for 3 hours, degassing under negative pressure after the reaction was completed, and the vacuum degree was -0.09MPa to obtain castor oil polyether;

[0042] Put castor oil polyether with a molar ratio of 1:2 and 0.1% hydrogen-containing silicone oil with a hydrogen content of 0.25% in a reactor, and stir for 40 minutes at a pressure of -0.09MPa and a temperature of 80°C for water removal treatment , followed by adding 0.3% chloroplatinic acid catalyst, setting nitrogen, raising the temperature to 90° C. for 4 hours in a nitrogen protection system, and finally obtaining the silicone-modified castor oil polyether defoamer active substance;

[0043] Take 15g of silicone-modified castor oil polyether antifoaming agent active substance, 2...

Embodiment 2

[0045] Castor oil is placed in 2.5L autoclave, adds 0.05% sodium methylate (calculated by castor oil quality), stirs and heats up, and vacuumizes, rises to 105 ℃, stops vacuuming, feeds and castor oil mol ratio is 1:80 propylene oxide and heated up to 120°C to react for a certain period of time. After the reaction was completed, negative pressure degassed and the vacuum degree was -0.09MPa to obtain castor oil polyether;

[0046] Put castor oil polyether with a molar ratio of 1:3 and 0.36% hydrogen-containing silicone oil in the reactor, stir at a pressure of -0.09MPa and a temperature of 85°C for 30 minutes to remove water, and then add 0.5% chlorine Platinic acid catalyst, nitrogen, in a nitrogen protection system, the temperature was raised to 85 ° C for 6 hours, and finally the silicone modified castor oil polyether defoamer active material was obtained;

[0047] Take 18g of silicone-modified castor oil polyether antifoaming agent active substance, 2g of Tween 20, 15g of i...

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Abstract

The invention discloses an emulsion type silicone modified castor oil polyether defoamer and a preparation method thereof. The preparation method comprises the following steps: mixing castor oil witha basic catalyst, introducing an epoxy compound in a nitrogen protection system, carrying out a reaction under a vacuum condition, and degassing the obtained system to obtain castor oil polyether; adding the prepared castor oil polyether and hydrogen-containing silicone oil into a reaction kettle, adding a catalyst under a heating vacuum condition, carrying out nitrogen displacement, and carryingout a reaction under the protection of N2 to obtain a silicone modified castor oil polyether defoamer active substance; and preparing the defoamer containing the silicone modified castor oil polyetherfrom the silicone modified castor oil polyether defoamer active substance, an emulsifier, fatty acid ester, saturated fatty alcohol polyether and an aqueous thickener solution. The silicone modifiedcastor oil polyether defoamer has an obvious elimination effect on foams in oil field exploitation, has a low surface tension, can effectively eliminate foams during oil-water separation in order to improve the oil recovery rate, has excellent dispersibility, and has no obvious side effects on oil bodies.

Description

technical field [0001] The invention relates to the technical research and development field of fine chemicals, in particular to an emulsion-type organosilicon-modified castor oil polyether defoamer and a preparation method thereof. Background technique [0002] Oilfield chemicals refer to various chemicals used in all processes such as oil exploration, drilling, gathering and transportation. At present, the crude oil extracted from most oil fields is mainly composed of oil, water and associated gas, and the crude oil treatment process is the oil-water separation process. In the process of crude oil extraction and processing, the temperature rise and pressure drop of the system will destroy the gas-liquid balance of crude oil, so that the light hydrocarbons dissolved in crude oil will escape as gas, causing the volume of crude oil to expand and generate foam. The generation of crude oil foam will not only reduce the effective separation space of the separator, reduce the se...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 王魁江孙九立马增超沈喜兰杜金洲陈小寒杨玉春赵晓刚王宏娟
Owner XIAN SUNY FINE CHEM
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