Silicone defoaming agent for papermaking and pulping and preparation method thereof

A technology of organosilicon defoamer and defoamer, which is applied in the field of fine chemicals, can solve the problems of complex production process, inability to take care of foam suppression, high viscosity of silicone grease and difficulty in emulsification, etc., and achieves easy-to-obtain raw materials, novel production formula, The effect of simple process

Inactive Publication Date: 2010-08-11
XIAN SUNY FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the above problems, solve the problem of harmful foam in the pulp mill, and the existing organic silicon defoamer can not take into account both defoaming and foam suppression, the production process is relatively complicated, and the viscosity of the silicone grease is too high to be emulsified. Certain difficult problems, provide an emulsion type defoamer for pulping and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 4 parts of hydrophobic silica, 40 parts of 10000cst simethicone oil, 52 parts of 100000cst simethicone oil, 4 parts of methyl vinyl MQ silicone resin, mix well at room temperature, stir and heat at 160°C for 3 hours, and cool naturally to room temperature.

[0045] Take 15 parts of the above silicone grease mixture, 3 parts of 500cst dimethicone oil, 3 parts of 1000cst dimethicone oil, 3 parts of glyceryl monostearate, 1 part of S-60 and 3 parts of T-60 into the reaction kettle, the system Raise the temperature to 60°C and stir for a certain period of time to make the components evenly mixed; then increase the stirring force and slowly add hot water at 70°C to the reaction kettle. When the phase transition is completed, stop heating the water and adjust the stirring force to To moderate temperature, add normal temperature water containing 2 parts of thickener into the emulsification tank, homogenize for 20 minutes, then cool to normal temperature to obtain pulping defoa...

Embodiment 2

[0047] 6 parts of hydrophobic silica, 80 parts of 30000cst simethicone oil, 10 parts of 50000cst simethicone oil, 4 parts of methylvinyl MQ silicone resin, mix well at room temperature, stir and heat at 160°C for 3 hours, and cool naturally to room temperature.

[0048] Take 15 parts of the above silicone grease mixture, 6 parts of 500cst dimethicone oil, 4 parts of glyceryl monostearate and 3 parts of Pingpingjia O-25 and add them into the reaction kettle. Mix evenly; then increase the stirring force, and slowly add hot water at 70°C to the reaction kettle at the same time. In the emulsification tank, homogenize for 20 minutes, then cool to normal temperature to obtain pulping defoamer B.

Embodiment 3

[0050] 4 parts of hydrophobic silica, 40 parts of 10000cst simethicone oil, 52 parts of 100000cst simethicone oil, 4 parts of methyl vinyl MQ silicone resin, mix well at room temperature, stir and heat at 160°C for 3 hours, and cool naturally to room temperature.

[0051] Take 10 parts of the above silicone grease mixture, 5 parts of 500cst dimethicone oil, 5 parts of 1000cst dimethicone oil, 4 parts of S-60, 2 parts of T-60 and 1 part of Pingpingjia O-25 into the reaction kettle, and the system is heated to 60°C, stir for a certain period of time to make the components evenly mixed; then increase the stirring force, and at the same time slowly add hot water at 70°C into the reaction kettle, when the phase transition is completed, stop heating the water, and adjust the stirring force to Moderately, add normal temperature water containing thickener into the emulsification tank, homogenize for 20 minutes, then cool to normal temperature to obtain pulping defoamer C.

[0052] Te...

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Abstract

The invention provides a silicone defomaing agent for papermaking and pulping and a preparation method thereof, which belong to the papermaking chemicals, and mainly comprise silicon grease mixture, silicon oil mixture, emulsifier, thickener and water. In the defoaming agent emulsion, silicon grease mixture and silicon oil mixture account for 70 to 90 percent of the active matter content, wherein total active matter content accounts for 5 to 30 percent of total content of emulsion, and the rest medium is water. The anti-foaming performance is improved through the silicon grease mixture, the defoaming performance is improved through the silicon oil mixture, the viscosity of the silicon grease is reduced by adding the emulsifier, and the emulsion effect is improved. The silicone defoaming agent has novel formula composition and good defoaming and anti-foaming performance, and has excellent performance in the papermaking pulping work procedure and partial water systems.

Description

technical field [0001] The invention relates to a defoamer and a preparation method thereof, in particular to an organosilicon defoamer for papermaking and pulping and a preparation method thereof. The invention belongs to the technical field of fine chemicals. Background technique [0002] Papermaking is a key industry in the production of the national economy. With the continuous advancement of modern papermaking technology, the output and quality of various papers have been greatly improved. However, due to the development of the paper industry, it also caused serious water pollution. Especially in the treatment of pulp production and papermaking wastewater, the problem of foam is particularly prominent. Foam is due to the natural substances such as fatty acids and resin acids contained in the raw materials for papermaking and pulping, which react with chemicals such as caustic soda and sulfide to form foaming substances such as fatty acid soap and resin acid soap, plus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/12D21H21/50C09D7/12
Inventor 陈雪影马增超
Owner XIAN SUNY FINE CHEM
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