CN113463368A - 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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- CN113463368A CN113463368A CN202110882832.0A CN202110882832A CN113463368A CN 113463368 A CN113463368 A CN 113463368A CN 202110882832 A CN202110882832 A CN 202110882832A CN 113463368 A CN113463368 A CN 113463368A
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- Prior art keywords
- cxt
- whitening agent
- fluorescent whitening
- polyalcohol
- 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, belonging to the field of whitening agents, the CXT liquid fluorescent whitening agent comprises a fluorescent whitening agent acid educt, polyalcohol amine and polyalcohol, and during preparation, the CXT fluorescent whitening agent acid educt, the polyalcohol amine and the polyalcohol are respectively added into a reaction kettle as raw materials and are uniformly stirred; heating to 80-100 deg.C, dissolving, clarifying, and steaming under negative pressure to remove 30-50% of water; and finally, cooling to 40-45 ℃ and filtering to obtain the CXT liquid fluorescent whitening agent, wherein the whitening agent is soluble in water, has wide 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 brightening agents, in particular to a CXT liquid fluorescent whitening agent and a preparation method of the CXT liquid fluorescent whitening agent.
Background
Optical brighteners are a fluorescent dye, otherwise known as white dyes, and are also complex organic compounds. Its characteristic is that it can excite incident ray to produce fluorescence, so that the dyed material can obtain the scintillation effect similar to fluorite, and the material seen by naked eye is very white.
However, the liquid products of the fluorescent whitening agent CXT are rarely seen in the market due to poor water solubility of the fluorescent whitening agent CXT, but the liquid demand of high-grade paper is large.
Disclosure of Invention
Aiming at the problems in the prior art, the first purpose of the invention is to provide a CXT liquid fluorescent brightener 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;
a second object of the present invention is to provide a process for the preparation of CXT liquid fluorescent whitening agents, which is simple to operate and easy to automate.
In order to solve the above problems, the present invention adopts the following technical solutions.
Scheme 1, the CXT liquid fluorescent whitening agent comprises 20-40% of CXT fluorescent whitening agent acid educt, 15-60% of polyalcohol amine and 15-60% of polyalcohol in percentage by mass.
Scheme 2, further, the polyol comprises 10-40% of propylene glycol and 5-20% of ethylene glycol in percentage by mass.
Scheme 3 further comprises 20-40% of CXT fluorescent brightener acid educt, 20-40% of polyalcohol amine and 20-40% of polyalcohol in percentage by mass.
Scheme 4, further, the polyol comprises 10-20% of propylene glycol and 10-20% of ethylene glycol in total mass percentage.
Scheme 5, further, the CXT fluorescent whitening agent acid-out is triazinylaminodistyrene.
Scheme 6, further, the triazinylaminostilbenes include CXT, BHT or CF, among other whitening agents.
Scheme 7, further, the polyalcohol amine has the structural formula RNR 'R ", wherein R is a polyhydroxyalkyl group having 1 to 4 carbons, R' is hydrogen or an alkyl group having 1 to 4 carbons or a polyhydroxyalkyl group which is the same as or different from R; r' is hydrogen or an alkyl group having 1 to 4 carbons or a polyhydroxyalkyl group which may be the same or different from R.
Scheme 8, further, R '' is hydrogen or alkyl of 1-4 carbons or polyhydroxyalkyl which is the same or different from R. Most preferably R, R ' and R ' ' are both hydroxyalkyl groups containing 2-3 carbons, due to the greater stability of the 2-3 carbon polyhydroxy group.
Scheme 9, further, the polyalcohol amine is triethanolamine.
Scheme 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, hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, trimethylolpropane and glycerol.
Scheme 11, further, the polyol is ethylene glycol, 1, 2-propylene glycol or glycerol.
Scheme 12, a process for the preparation of a CXT liquid fluorescent whitening agent, said process comprising the steps of: s1: adding CXT fluorescent brightener acid educt, polyalcohol amine and polyalcohol serving as raw materials into a reaction kettle, and uniformly stirring; s2: heating to 80-100 deg.C, dissolving, clarifying, and steaming under negative pressure to remove 30-50% of water; s3: and 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 is easy to operate and control automatically, and the CXT liquid fluorescent whitening agent produced by the method is mixed with water, has stability at a wider temperature, can be stored for a long time, supports automatic continuous use, and is safe and environment-friendly.
Detailed Description
Raw material examples:
group 5 experiments (examples 1-5) CXT liquid fluorescent whitening agent was prepared, with the raw materials prepared separately for each group of examples and the required raw materials and weight data filled in the following table one:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Fluorescent whitening agent CXT acid precipitation filter cake | 120g | 120g | 120g | 120g | 120g |
| 1, 2-propanediol | 25g | 15g | 15g | ||
| Ethylene glycol | 25g | ||||
| Triethanolamine | 25g | 30g | 30g | 15g | |
| Ethanolamine | 30g | 15g | |||
| Glycerol | 25g | 10g | 20g |
Example 1:
putting the raw material of example 1 shown in the table I, 120g of a fluorescent brightener CXT acid precipitation filter cake, 25g of ethylene glycol and 25g of triethanolamine into a four-neck flask, heating to 60-80 ℃, and stirring until the raw material is completely dissolved; heating under vacuum condition to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with stable low temperature.
The product has an E value of 174, good fluidity and stability, and no precipitation or solidification after being refrigerated at-5 ℃ for 6 months.
Example 2:
putting the raw material of example 2 shown in the table I, 120g of a fluorescent brightener CXT acid precipitation filter cake, 25g of 1, 2-propanediol and 30g of monoethanolamine into a four-neck flask, heating to 60-80 ℃, and stirring until the raw material is completely dissolved; heating under vacuum condition to evaporate 30g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with stable low temperature.
The product has an E value of 152, and has good fluidity and stability, and can not be separated out and solidified after being refrigerated at-5 ℃ for 6 months.
Example 3:
the raw material of example 3 shown in the table one, 120g of the acid precipitation filter cake of the fluorescent brightener CXT, 25g of glycerol and 30g of triethanolamine are put into a four-neck flask, heated to 60-80 ℃, stirred until the raw material is completely dissolved, and filtered to obtain the CXT liquid fluorescent brightener stable at low temperature.
The product has an E value of 128, good fluidity and stability, and no precipitation or solidification after being refrigerated at-5 ℃ for 6 months.
Example 4:
putting the raw material of example 4 shown in the table I, 120g of a fluorescent brightener CXT acid precipitation filter cake, 10g of glycerol, 15g of 1, 2-propylene glycol and 30g of triethanolamine into a four-neck flask, heating to 60-80 ℃, and stirring until the raw material is completely dissolved; heating under vacuum condition to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with stable low temperature.
The product has an E value of 181, good fluidity and stability, and no precipitation or solidification after being refrigerated at-5 deg.C for 6 months.
Example 5:
putting the raw material of example 5 shown in the table I, 120g of a fluorescent brightener CXT acid precipitation filter cake, 20g of glycerol, 15g of 1, 2-propylene glycol, 15g of triethanolamine and 15g of monoethanolamine into a four-neck flask, heating to 60-80 ℃, and stirring until the raw material is completely dissolved; heating under vacuum condition to evaporate 50g of water, and filtering to obtain the CXT liquid fluorescent whitening agent with stable low temperature.
The product has an E value of 178, good fluidity and stability, and no precipitation and solidification after being refrigerated for 6 months at-5 ℃.
Claims (10)
1. A CXT liquid fluorescent whitening agent characterized by: comprises 20-40% of CXT fluorescent brightener acid educt, 15-60% of polyalcohol amine and 15-60% of polyalcohol in percentage by total mass.
2. A CXT liquid fluorescent whitening agent according to claim 1, characterized in that: the polyalcohol comprises 10-40% of propylene glycol and 5-20% of ethylene glycol in percentage by mass.
3. A CXT liquid fluorescent whitening agent according to claim 1, characterized in that: comprises 20-40% of CXT fluorescent brightener acid educt, 20-40% of polyalcohol amine and 20-40% of polyalcohol in percentage by total mass.
4. A CXT liquid fluorescent whitening agent according to claim 3, characterized in that: the polyalcohol comprises 10-20% of propylene glycol and 10-20% of ethylene glycol in percentage by mass.
5. A CXT liquid fluorescent whitening agent according to claim 1, characterized in that: the CXT fluorescent brightener acid product is triazinyl amino stilbene.
6. A CXT liquid fluorescent whitening agent according to claim 1, characterized in that: the structural formula of the polyalcohol amine is RNR ' R ', wherein R is polyhydroxy alkyl containing 1-4 carbons, R ' is hydrogen or alkyl containing 1-4 carbons or polyhydroxy alkyl which is the same as or different from R; r' is hydrogen or an alkyl group having 1 to 4 carbons or a polyhydroxyalkyl group which may be the same or different from R.
7. A CXT liquid fluorescent whitening agent according to claim 4, wherein: the polyalcohol amine is triethanolamine.
8. A CXT liquid fluorescent whitening agent according to claim 1, characterized in that: the polyhydric alcohol is one or a mixture of more than two of pentaerythritol, ethylene glycol, 1, 2-propylene glycol, 1, 4-butanediol, hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, trimethylolpropane and glycerol.
9. A CXT liquid fluorescent whitening agent according to claim 8, characterized in that: the polyol is ethylene glycol, 1, 2-propylene glycol or glycerol.
10. A process for the preparation of a CXT liquid fluorescent whitening agent according to any one of claims 1 to 9, characterized in that: the preparation method comprises the following steps:
s1: adding CXT fluorescent brightener acid educt, polyalcohol amine and polyalcohol serving as raw materials into a reaction kettle, and uniformly stirring;
s2: heating to 80-100 deg.C, dissolving, clarifying, and steaming under negative pressure to remove 30-50% of water;
s3: and finally, cooling to 40-45 ℃ and filtering to obtain the CXT liquid fluorescent whitening agent.
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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 |
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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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| CN113463368B (en) | 2023-09-26 |
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