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Antifoaming agent for low-temperature paper making system

A defoaming agent and system technology, applied in the field of fine chemical preparations, can solve the problems of poor defoaming and suppressing ability, affecting the use of defoaming agents, and inability to adapt to foaming systems.

Active Publication Date: 2011-11-16
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

[0004] Although the current papermaking technology continues to improve and the water temperature of white water is also on the rise, due to the vast territory of our country and the large climate difference between the north and the south, in winter, the water temperature of some enterprises is low when making paper. The existing high-carbon alcohol Emulsion defoamer, cannot adapt to the foaming system at low temperature, so the ability to defoam and suppress foam becomes poor
At the same time, since the emulsion is a thermodynamically unstable system, the high-carbon alcohol emulsion defoamer is prone to phase separation after long-term storage or, more likely, long-term storage at low temperature, which affects the use of the defoamer

Method used

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  • Antifoaming agent for low-temperature paper making system
  • Antifoaming agent for low-temperature paper making system
  • Antifoaming agent for low-temperature paper making system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] With 16 parts of stearyl alcohol, 6 parts of carnauba wax, 6 parts of high carbon alcohol polyether ester (C 12 h 26 O(EO) 1 (PO) 30 COC 9 h 19 ), 1 part of nonionic surfactant (C 12 h 26 O(EO) 40 H), 1 part of anionic emulsifier (sodium dodecyl diphenyl ether disulfonate), add to the reaction kettle, mix and heat up to 70°C, after stirring evenly, add 70 parts of water at 75°C, and obtain by high-speed shearing equipment Emulsion, adding acrylate thickener to adjust viscosity to obtain defoamer.

Embodiment 2

[0025] With 20 parts of eicosanol, 4 parts of microcrystalline wax, 4 parts of high carbon alcohol polyether ester (C 16 h 34 O(EO) 5 (PO) 20 COC 13 h 27 ), 1 part of nonionic surfactant (C 16 h 34 O(EO) 20 H), 1 part of anionic emulsifier (sodium octyl diphenyl ether disulfonate), added to the reactor, mixed and heated to 85 ° C, after stirring evenly, 70 parts of water at 75 ° C were added, and the emulsion was obtained by high-speed shearing equipment. Acrylate thickener is added to adjust viscosity to obtain defoamer.

Embodiment 3

[0027] 18 parts of tetracosanol, 6 parts of polyethylene wax, 4 parts of high carbon alcohol polyether ester (C 22 h 46 O(EO) 9 (PO) 8 COC 15 h 31 ), 1 part of nonionic surfactant (C 20 h 42 O(EO) 60 H), 1 part of anionic emulsifier (sodium hexadecyl diphenyl ether disulfonate), add to the reaction kettle, mix and heat up to 90 ° C, after stirring evenly, add 70 parts of water at 75 ° C, and obtain by high-speed shearing equipment Emulsion, adding acrylate thickener to adjust viscosity to obtain defoamer.

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PUM

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Abstract

The invention provides a high-alcohol emulsion type antifoaming agent for a low-temperature paper making system. The antifoaming agent comprises the components of high alcohol, a nonionic surfactant, an anionic surfactant, high alcohol polyether ester, a wax-shaped substance, a thickening agent and water. In the invention, after the high alcohol polyether ester is introduced, the problem that theantifoaming effect of the high alcohol emulsion is poor under a low temperature condition is solved, thus the high alcohol emulsion can keep outstanding antifoaming performance under the low temperature paper making system, and the storage stability of the high alcohol emulsion can also be enhanced.

Description

technical field [0001] The invention relates to a defoamer for a papermaking system in the papermaking industry, which belongs to the technical field of fine chemical preparations. technical background [0002] The paper industry includes processes such as pulping, papermaking and coating. Due to the influence of various surface-active additives in wet-end chemistry, it is easy to produce a large amount of foam that is not easy to eliminate in water. At the same time, various plant fibers contained in pulping raw materials contain hydroxyl groups, which can easily make the fiber surface and A large amount of internal adsorption is difficult to remove fine bubbles and foam with ordinary defoamers, which seriously affects subsequent processes and product quality. Therefore, the selection and use of defoamers is particularly important for papermaking processes. [0003] The main function of the papermaking defoamer is to peel off the air bubbles adsorbed on the fine fibers fir...

Claims

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Application Information

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IPC IPC(8): D21H21/12D21H17/60
Inventor 吴飞朱少勇钟翔曹添刘扬孙颖欣
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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