CN113463368B - CXT liquid fluorescent whitening agent and preparation method thereof - Google Patents
CXT liquid fluorescent whitening agent and preparation method thereof Download PDFInfo
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- CN113463368B CN113463368B CN202110882832.0A CN202110882832A CN113463368B CN 113463368 B CN113463368 B CN 113463368B CN 202110882832 A CN202110882832 A CN 202110882832A CN 113463368 B CN113463368 B CN 113463368B
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- cxt
- whitening agent
- fluorescent whitening
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- liquid fluorescent
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/60—Optical bleaching or brightening
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/60—Optical bleaching or brightening
- D06L4/614—Optical bleaching or brightening in aqueous solvents
Abstract
The invention discloses a CXT liquid fluorescent whitening agent and a preparation method thereof, which belong to the field of whitening agents, and the CXT liquid fluorescent whitening agent comprises an acid analyte of the fluorescent whitening agent, polyalcohol amine and polyalcohol, wherein the CXT fluorescent whitening agent acid analyte, the polyalcohol amine and the polyalcohol are respectively added into a reaction kettle as raw materials during the preparation, and are uniformly stirred; heating to 80-100deg.C, and steaming under negative pressure to remove 30-50% of water after the materials are dissolved, clarified and transparent; finally, cooling to 40-45 ℃ and filtering to obtain the CXT liquid fluorescent whitening agent, wherein the whitening agent is soluble in water, has wider temperature stability, can be stored for a long time, supports automatic continuous use, and is safe and environment-friendly.
Description
Technical Field
The invention relates to the field of whitening agents, in particular to a CXT liquid fluorescent whitening agent and a preparation method of the CXT liquid fluorescent whitening agent.
Background
Fluorescent whitening agents are a fluorescent dye, or white dye, and are also a complex organic compound. The fluorescent dye has the characteristics of exciting incident light to generate fluorescence, so that the dyed substances obtain a flash luminescence effect similar to fluorite, and the substances seen by naked eyes are very white.
However, because of the poor water solubility of fluorescent whitening agents CXT, liquid products are rarely seen on the market, but the liquid demand of high-grade paper is high.
Disclosure of Invention
Aiming at the problems in the prior art, the first object of the invention is to provide a CXT liquid fluorescent whitening agent which is miscible with water, has wider temperature stability, can be stored for a long time, supports automatic continuous use, and is safe and environment-friendly;
the second object of the invention is to provide a preparation method of CXT liquid fluorescent whitening agent, which is simple to operate and easy to automatically control.
In order to solve the problems, the invention adopts the following technical scheme.
Scheme 1, a CXT liquid fluorescent whitening agent, comprising, by mass percent total, 20-40% CXT fluorescent whitening agent acid-out, 15-60% polyalcohol amine and 15-60% polyalcohol.
Scheme 2, further, the polyol comprises 10-40% propylene glycol and 5-20% ethylene glycol, by total mass percent.
Scheme 3, further comprising, in total mass percent, 20-40% of a CXT fluorescent whitening agent acid precipitate, 20-40% of a polyalcohol amine and 20-40% of a polyalcohol.
Scheme 4, further, the polyol comprises 10-20% propylene glycol and 10-20% ethylene glycol, by total mass percent.
Scheme 5, further, the CXT fluorescent whitening agent acid analyte is triazinylaminostilbenes.
Scheme 6, further, the triazinylaminostilbenes include whitening agents such as CXT, BHT or CF.
Scheme 7, further wherein the polyalcohol amine has the structural formula RNR 'R ", wherein R is a polyhydroxyalkyl group containing 1 to 4 carbons, R' is hydrogen or an alkyl group containing 1 to 4 carbons or a polyhydroxyalkyl group identical to or different from R; r '' is hydrogen or an alkyl group having 1 to 4 carbon atoms or a polyhydroxyalkyl group which is the same or different from R.
Scheme 8, further, R '' is hydrogen or an alkyl group containing 1-4 carbons or a polyhydroxyalkyl group identical to or different from R. Due to the better polyhydroxy stability of 2-3 carbons, the most preferred R, R ', R ' ' are hydroxyalkyl groups containing 2-3 carbons.
Scheme 9, further wherein the polyalcohol amine is triethanolamine.
In the embodiment 10, further, the polyhydric alcohol is one or a mixture of more than two of pentaerythritol, ethylene glycol, 1, 2-propylene glycol, 1, 4-butanediol, hexylene glycol, neopentyl glycol, diethylene glycol, dipropylene glycol, trimethylolpropane and glycerol.
Scheme 11, further wherein the polyol is ethylene glycol, 1, 2-propanediol, or glycerol.
Scheme 12, a method of preparing a CXT liquid fluorescent whitening agent, comprising the steps of: s1: respectively adding CXT fluorescent whitening agent acid analyte, polyalcohol amine and polyalcohol into a reaction kettle as raw materials, and uniformly stirring; s2: heating to 80-100deg.C, and steaming under negative pressure to remove 30-50% of water after the materials are dissolved, clarified and transparent; s3: finally cooling to 40-45 ℃ and filtering to obtain the CXT liquid fluorescent whitening agent.
Compared with the prior art, the invention has the advantages that: the CXT liquid fluorescent whitening agent produced by the method is miscible with water, has wider temperature stability, can be stored for a long time, supports automatic continuous use, and is safe and environment-friendly.
Detailed Description
Raw material examples:
CXT liquid fluorescent whitening agents were prepared in 5 sets of experiments (examples 1-5), starting materials were prepared separately for each set of examples, and the required starting materials and weight data were filled into Table one below:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| CXT acid precipitation filter cake of fluorescent whitening agent | 120g | 120g | 120g | 120g | 120g |
| 1, 2-propanediol | 25g | 15g | 15g | ||
| Ethylene glycol | 25g | ||||
| Triethanolamine salt | 25g | 30g | 30g | 15g | |
| Monoethanolamine | 30g | 15g | |||
| Glycerol | 25g | 10g | 20g |
Example 1:
putting the raw materials of the example 1 shown in Table I into a four-neck flask, carrying out acid precipitation on 120g of filter cake by CXT (fluorescent whitening agent), 25g of glycol and 25g of triethanolamine, heating to 60-80 ℃, and stirring until the raw materials are completely dissolved; and heating under vacuum to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with low temperature stability.
The product has E value of 174, good fluidity and stability, and no precipitation and solidification after cold storage at-5deg.C for 6 months.
Example 2:
putting the raw materials of the example 2 shown in Table I into a four-neck flask, carrying out acid precipitation on 120g of filter cake by using a fluorescent whitening agent CXT, 25g of 1, 2-propylene glycol and 30g of monoethanolamine, heating to 60-80 ℃, and stirring until the raw materials are completely dissolved; and heating under vacuum to evaporate 30g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with low temperature stability.
The product has E value of 152, good fluidity and stability, and no precipitation and solidification after cold storage at-5deg.C for 6 months.
Example 3:
the materials of example 3 shown in Table I are put into a four-necked flask, the CXT acid-precipitation filter cake of the fluorescent whitening agent is 120g, the glycerol is 25g, the triethanolamine is 30g, the temperature is raised to 60-80 ℃, the materials are stirred until the materials are completely dissolved, and then the CXT liquid fluorescent whitening agent with low temperature stability is obtained by filtration.
The product has E value of 128, good fluidity and stability, and no precipitation and solidification after cold storage at-5deg.C for 6 months.
Example 4:
putting the raw materials of the example 4 shown in Table I into a four-necked flask, carrying out acid precipitation on 120g of filter cake by CXT (fluorescent whitening agent), 10g of glycerol, 15g of 1, 2-propylene glycol and 30g of triethanolamine, heating to 60-80 ℃, and stirring until the raw materials are completely dissolved; and heating under vacuum to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with low temperature stability.
The product has E value of 181, good fluidity and stability, and no precipitation and solidification after cold storage at-5deg.C for 6 months.
Example 5:
putting the raw materials of the example 5 shown in Table I into a four-necked flask, carrying out acid precipitation on 120g of filter cake by using a fluorescent whitening agent CXT, 20g of glycerol, 15g of 1, 2-propylene glycol, 15g of triethanolamine, 15g of monoethanolamine, heating to 60-80 ℃, and stirring until the raw materials are completely dissolved; and heating under vacuum to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with low temperature stability.
The product has E value of 178, good fluidity and stability, and no precipitation and solidification after cold storage at-5deg.C for 6 months.
Claims (1)
1. A preparation method of CXT liquid fluorescent whitening agent is characterized in that: the method comprises the following steps: 120g of fluorescent whitening agent CXT acid-out filter cake, 20g of glycerin, 15g of 1, 2-propylene glycol, 15g of triethanolamine and 15g of monoethanolamine are mixed, then the temperature is raised to 60-80 ℃, and the mixture is stirred until the raw materials are completely dissolved; and heating under vacuum to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with low temperature stability.
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| CN202110882832.0A CN113463368B (en) | 2021-08-02 | 2021-08-02 | CXT liquid fluorescent whitening agent and preparation method thereof |
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|---|---|---|---|
| CN202110882832.0A CN113463368B (en) | 2021-08-02 | 2021-08-02 | CXT liquid fluorescent whitening agent and preparation method thereof |
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| CN113463368B true CN113463368B (en) | 2023-09-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367770A (en) * | 2008-09-26 | 2009-02-18 | 贺明波 | Preparation method for fluorescent whitening agent |
| CN102093750A (en) * | 2010-11-26 | 2011-06-15 | 山西青山化工有限公司 | Method for preparing disulfonic acid liquid fluorescent brightening agent with low temperature stability |
| CN102926279A (en) * | 2012-11-08 | 2013-02-13 | 山西青山化工有限公司 | Method for preparing liquid fluorescent brightener combination capable of being steadily stored |
| CN103254660A (en) * | 2013-05-20 | 2013-08-21 | 浙江传化华洋化工有限公司 | Preparation method of carbamide-free disulfonic acid triazinyl fluorescent whitening agent liquid |
| CN104262990A (en) * | 2014-09-23 | 2015-01-07 | 浙江传化华洋化工有限公司 | Preparation method of suspension of fluorescent whitening agent |
-
2021
- 2021-08-02 CN CN202110882832.0A patent/CN113463368B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367770A (en) * | 2008-09-26 | 2009-02-18 | 贺明波 | Preparation method for fluorescent whitening agent |
| CN102093750A (en) * | 2010-11-26 | 2011-06-15 | 山西青山化工有限公司 | Method for preparing disulfonic acid liquid fluorescent brightening agent with low temperature stability |
| CN102926279A (en) * | 2012-11-08 | 2013-02-13 | 山西青山化工有限公司 | Method for preparing liquid fluorescent brightener combination capable of being steadily stored |
| CN103254660A (en) * | 2013-05-20 | 2013-08-21 | 浙江传化华洋化工有限公司 | Preparation method of carbamide-free disulfonic acid triazinyl fluorescent whitening agent liquid |
| CN104262990A (en) * | 2014-09-23 | 2015-01-07 | 浙江传化华洋化工有限公司 | Preparation method of suspension of fluorescent whitening agent |
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