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Mineral oil defoaming agent and preparation method thereof

A technology of mineral oil and defoamer, which is applied in the direction of foam dispersion/prevention, and can solve the problems of gel state destruction, poor product stability, and low viscosity of defoamer products, etc.

Active Publication Date: 2011-03-30
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when fatty acid metal soap and fatty acid amide are added at the same time, because the amide is alkaline, the gel state formed by the metal soap is easily destroyed, which has a great impact on the product viscosity, especially when the defoamer preparation temperature is greater than 100 ° C. The viscosity of the defoamer product that obtains obviously becomes smaller, makes product stability poorer, and its reason is: fatty acid aluminum is the octahedral structure that comprises O→A1 coordination bond, if add in the hydrocarbon gel of aluminum soap Compounds with a tendency to coordinate, such as amines, alcohols, phenols, and water, break the O→A1 bond and accelerate the destruction of the gel network, especially when the temperature is greater than 100 °C.

Method used

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  • Mineral oil defoaming agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 52g white oil (5#), 10g aluminum di(octadecanoate) and 15g structural formula are C 16 h 33 O(EO) 18 (PO) 29 Add the defoaming aid of H into the reaction flask, start stirring, and slowly raise the temperature. When the temperature rises to 140°C, keep it warm for 1 hour, and then lower the temperature to 40°C. Add 5g of EBS and 10g of white oil (5#) into the beaker, start stirring, slowly raise the temperature to 125°C, keep it warm for 0.5h, and immediately add it to the stirring aluminum di(octadecanoate) / white oil gel In the system, lower the temperature to below 70°C, add 8g of oleic acid polyoxyethylene (6) ether and mix well to obtain defoamer I.

Embodiment 2

[0040] 66g of kerosene, 6g of aluminum hexadecanoate, and 15g of structural formula C 10 h 21 O(EO)10 (PO) 50 H's defoaming aid and 4g specific surface area is 200m 2 / g Vapor-phase hydrophobic silica was added to the reaction flask, stirring was started, and the temperature was raised slowly until the temperature was raised to 140°C, kept for 1 hour, and then cooled to 50°C. In addition, add 1g of ethylene bispalmitic acid amide and 10g of white oil (15#) into the beaker, start stirring, slowly raise the temperature to 125°C, keep it warm for 0.5h, and immediately add it to the stirring aluminum hexadecanoate / kerosene gel In the glue system, lower the temperature to below 70°C and mix evenly to obtain the defoamer II.

Embodiment 3

[0042] 70g of alkylbenzene, 3g of aluminum dibutyrate, and 10g of structural formula C 12 h 25 O(EO) 15 (PO) 45 The defoaming aid of H and the specific surface area of ​​5g is 230m 2 / g of vapor-phase hydrophobic silica was added to the reaction flask, stirring was started, and the temperature was raised slowly until the temperature was raised to 130°C, kept for 2 hours, and then cooled to 50°C. Add 0.5g of ethylene bis-myristic acid amide and 6g of liquid wax (300#) into the beaker, start stirring, slowly raise the temperature to 125°C, keep it warm for 0.5h, and immediately add it to the stirring aluminum / alkane dibutyrate In the benzene gel system, lower the temperature to below 70°C, add 5.5g of oleic acid polyoxyethylene (9) ether and stir evenly to obtain the defoamer III.

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Abstract

The invention provides a mineral oil defoaming agent comprising mineral oil, a fatty acid metal soap, fatty acid amide, white carbon black, a defoaming auxiliary agent and an emulsifying agent. The invention has the technical scheme that the fatty acid metal soap, the fatty acid amide and the white carbon black are simultaneously selected as defoaming substances and a method mixing the defoaming substances into the mineral oil is changed, thus the stability and the foam removing and depressing properties of the mineral oil defoaming agent are improved. The mineral oil defoaming agent has better foam removing and depressing effects in the processes of papermaking black liquor, coating, sewage treatment, latex, cleaning, and the like.

Description

technical field [0001] This patent mainly relates to a mineral oil type defoamer and its preparation process. The defoamer belongs to fine chemicals. Therefore, the present invention belongs to the technical field of fine chemicals. technical background [0002] Defoamer is a kind of fine chemical, which is widely used in various industrial fields. When used, the defoamer itself must not only have excellent defoaming and antifoaming performance and stability, but also require excellent compatibility with other additives. compatibility. Defoamers are mainly divided into silicone defoamers and non-organosilicon defoamers. Silicone defoaming agent is characterized by fast defoaming speed, but poor compatibility with foaming system, and it is easy to form defects such as silicon spot and shrinkage cavity when it is used for defoaming of coating products such as coatings; non-organic silicon Defoamers are generally composed of fatty alcohols, fatty acid esters, metal soaps, fat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 池跃芹吴飞曹添黄伟钟翔章强
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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