CN101638870A - Silicone defoamer - Google Patents
Silicone defoamer Download PDFInfo
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- CN101638870A CN101638870A CN200810012583A CN200810012583A CN101638870A CN 101638870 A CN101638870 A CN 101638870A CN 200810012583 A CN200810012583 A CN 200810012583A CN 200810012583 A CN200810012583 A CN 200810012583A CN 101638870 A CN101638870 A CN 101638870A
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- China
- Prior art keywords
- silicone defoamer
- resistance
- potassium hydroxide
- tributyl phosphate
- defoamer
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Abstract
The invention relates to a silicone defoamer suitable for various processes in the papermaking industry. The silicone defoamer is prepared from the following compositions: simethicone, hydroxy silicone oil, tributyl phosphate and potassium hydroxide of which the weight ratio is 100-200:80-180:70-150:40-80. The silicone defoamer cannot react with other foaming substances, has no toxicity and pollution, is harmless to environment, has excellent defoaming performance, less consumption, wide applicable temperature range, remarkable performance of heat resistance, cold resistance, weather resistance and ageing resistance, and good flexibility and lubricating property, is favorable for improving the quality of coated paper, and has less consumption to be suitable for various processes.
Description
Technical field
The present invention relates to a kind of defoamer, relate in particular to a kind of silicone defoaming agent, be applicable to each operation of paper industry.
Background technology
The consumption of defoamer in paper industry is little, but its effect can not be ignored.In whole pulp and paper industry process, sequence of operations behind the boiling blowing, as washing, screening, bleaching, concentrate, pulp feeding system, top sizing, coating, black liquor recovery etc., all be subjected to the influence of foam to some extent, disturb ordinary production, paper quality is descended, when serious production can't be gone on.The removing method of foam mainly contains chemical method, physics method and Mechanical Method.Chemistry froth breaking method is exactly to add chemical substance (defoamer) in process of production to eliminate foam; The utilization of physical defoaming method is left standstill, is heated or reduce pressure and eliminates foam; The mechanical defoaming method adopts mechanical force to make lather collapse exactly.Physics method and Mechanical Method are simple to operate, but passive, only take stopgap measures and do not effect a permanent cure, and effect is undesirable.Using the most widely used at present is chemical froth breaking method, promptly uses the formation of foam in the defoamer control paper-making process and abolishes established foam.
In pulping process, owing to contain natural materials such as aliphatic acid, resin acid in the pulping raw material, foamers such as generation fatty acid soaps, the resin acid soaps of reacting with chemicalss such as the caustic soda that adds, akali sulphide, add the steady bubble effect of polymer substances such as cellulose, when the stream of slurry send and mixes, bring a large amount of air into slurry system and just formed a large amount of stable foams, bring very big difficulty for subsequent handling such as washing, conveying, bleaching etc., cause laitance and pulp quality is reduced.The factory that has adopts " clear water is pressed bubble ", and this method is to certain effect that defoams, but the de-bubble effect is unsatisfactory.Pulping process washs foaming such as fatty acid soaps that the black liquor that gets off also contains high concentration, resin acid soaps and surely steeps material, is handled easily and improves the paper pulp alkali recovery, also must carry out defoaming treatment to black liquor.
In the slip of machine hand's preface, also contain to the pulping process slip in similar foaming and steady bubble material, in operation also can entrained air and produce foam, the existence of foam has a significant impact paper, make that degree of sizing is poor, the cross direction ration homogeneity is poor, paper spot, diaphanous spot and small holes etc. occur, even causes disconnected paper.In addition, produce a large amount of foams in the paper plain boiled water, also should add defoamer and get rid of, to improve the rate of recovery of paper pulp if copy.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, design through optimization of C, make meticulously, a kind of silicone defoaming agent is provided, solved the problem that defoamer is easy and other foamer reacts in the prior art, and the Applicable temperature scope is wide, and heat-resisting, cold-resistant, weather-proof and ageing-resistant performance is given prominence to.
Technical scheme of the present invention is as follows:
It is formulated by weight by following compositions, dimethicone: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=100-200: 80-180: 70-150: 40-80.
The preferred weight ratio of raw material of the present invention is dimethicone: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=162: 93: 87: 56.
Advantage of the present invention and beneficial effect are as follows:
The present invention can not react with other foamer; Nontoxic, pollution-free, environmental sound; Have outstanding antifoam performance, consumption is few; The Applicable temperature scope is wide, and heat-resisting, cold-resistant, weather-proof and ageing-resistant performance is given prominence to; Have good flexibility and greasy property, help improving the quality of coated paper.Consumption is few, is fit to each operation.
The specific embodiment
Embodiment 1
The present invention is formed by weight configuration by following composition:
Dimethicone: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=162: 93: 87: 56.
Embodiment 2
It is to form dimethicone by following composition by weight configuration: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=100: 80: 70: 40.
Embodiment 3
It is to form dimethicone by following composition by weight configuration: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=200: 180: 150: 80.
Embodiment 4
It is to form dimethicone by following composition by weight configuration: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=150: 130: 70: 80.
Claims (2)
1, a kind of silicone defoaming agent is characterized in that by following compositions by weight formulated dimethicone: hydroxy silicon oil: tributyl phosphate: potassium hydroxide=100-200: 80-180: 70-150: 40-80.
2, silicone defoaming agent according to claim 1 is characterized in that the weight ratio of above-mentioned each raw material is dimethicone: hydroxy silicon oil: tributyl phosphate: potassium hydroxide-162: 93: 87: 56.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012583A CN101638870A (en) | 2008-08-01 | 2008-08-01 | Silicone defoamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012583A CN101638870A (en) | 2008-08-01 | 2008-08-01 | Silicone defoamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101638870A true CN101638870A (en) | 2010-02-03 |
Family
ID=41614031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810012583A Pending CN101638870A (en) | 2008-08-01 | 2008-08-01 | Silicone defoamer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101638870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106318591A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | Defoaming agent for water-glycol fire-retardant hydraulic fluid |
| CN106810171A (en) * | 2017-02-28 | 2017-06-09 | 王亚文 | A kind of concrete segment and its manufacture method |
-
2008
- 2008-08-01 CN CN200810012583A patent/CN101638870A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106318591A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | Defoaming agent for water-glycol fire-retardant hydraulic fluid |
| CN106810171A (en) * | 2017-02-28 | 2017-06-09 | 王亚文 | A kind of concrete segment and its manufacture method |
| CN106810171B (en) * | 2017-02-28 | 2019-11-29 | 浙江万寿建筑工业科技有限公司 | A kind of concrete segment and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100203 |