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High-dispersivity fluorescent whitening agent and preparation method thereof

A fluorescent whitening agent, high dispersibility technology, applied in the field of fluorescent whitening agents, can solve the problem of not pointing out the specific index of powder product dispersibility, not disclosing the preparation method of highly dispersible particle fluorescent whitening agent composition, and not providing to issues such as decentralization requirements

Active Publication Date: 2013-06-26
山西晋光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stilbene bistriazine derivative whitening agent mentioned in this patent should be mixed with one or more of 1,4-di(cyanostyrene) benzene and other types of whitening agents to achieve Excellent dispersing effect, but it does not mention whether only the stilbene bistriazine derivative whitening agent can meet the excellent dispersibility requirements, and does not point out the specific index of the dispersibility of the powder product obtained by this method
And in the field of fluorescent whitening agent for washing at present, do not see the report of applying this technology yet, also do not disclose the method for preparing highly dispersible granular fluorescent whitening agent composition

Method used

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  • High-dispersivity fluorescent whitening agent and preparation method thereof
  • High-dispersivity fluorescent whitening agent and preparation method thereof
  • High-dispersivity fluorescent whitening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 12.8kg fluorescent whitening agent 4,4'-bis[(4-anilino-6-morpholinyl-1,3,5-triazin-2-yl)amino]stilbene-2,2'- Disulfonic acid disodium salt dry powder, 2.6kg sodium methylene bis-naphthalene sulfonate, 3kg sodium sulfate, 1kg sodium carbonate are added to 45.6kg water, beating and dispersing until the particle fineness is ≤50 microns, and then sending the slurry into the grinding medium Grind in a 5L sand mill with a filling rate of 80%. Grind three times (56 minutes in total) to reach the particle size of the original whitening agent ≤ 5 microns. The slurry after grinding has good fluidity and is sprayed Dry to obtain a bulk density of 536kg m -3 granular fluorescent whitening agent.

[0026] The product has good fluidity and is easy to use, and its dispersibility in detergent reaches 64.1% in 2 minutes and 88.5% in 10 minutes.

Embodiment 2

[0028] 34.4kg fluorescent whitening agent 4,4'-bis[(4-anilino-6-morpholinyl-1,3,5-triazin-2-yl)amino]stilbene-2,2'- Disulfonic acid disodium salt filter cake (solid content 48.6%), 1.7kg sodium methylene bis-naphthalene sulfonate, 2kg sodium sulfate, 1kg sodium carbonate are added to 18.8kg water, beating and dispersing until particle fineness≤50 microns , add the slurry to a 5L sand mill with a grinding medium filling rate of about 80% for grinding, and grind three times (total time-consuming 48min) to reach the particle size of the original whitening agent ≤ 5 microns, the slurry after grinding Good fluidity, it is spray-dried to obtain a bulk density of 553kg m -3 granular fluorescent whitening agent. The dispersibility in detergent reaches 70.2% in 2 minutes; 92.5% in 10 minutes.

Embodiment 3

[0030] 36.2kg fluorescent whitening agent 4,4'-bis[(4-anilino-6-methoxy-1,3,5-triazin-2-yl)amino]stilbene-2,2'- Disulfonic acid disodium salt filter cake (solid content 45.7%), 2kg sodium lignosulfonate, 1.6kg sodium chloride, 1kg potassium hydroxide join in 21.4kg water, after beating is dispersed to particle fineness≤50 microns, Add the slurry to a 5L sand mill with a grinding medium filling rate of about 80% for grinding, and grind three times (62 minutes in total) to achieve the particle size of the original whitening agent ≤ 5 microns, and the slurry after grinding Good fluidity, it is spray-dried to obtain a bulk density of 502kg m -3 granular fluorescent whitening agent. The dispersibility in detergent reaches 63.6% in 2 minutes; 87.5% in 10 minutes.

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Abstract

The invention provides a high-dispersivity fluorescent whitening agent, which comprises the following ingredients in percentage by weight: 20 to 45 parts of pure products converted from fluorescent whitening agent products represented by the following general formula or crude products with the fluorescent whitening agent, 2 to 30 parts of dispersing agents, 3 to 20 parts of inorganic salt and 2 to 10 parts of inorganic base. Water is added into the ingredients to be prepared into pulp with the solid content between 20 and 45 percent, the ingredients are ground into materials with the grain fineness smaller than or equal to 5 mm, and the grain type fluorescent whitening agent with the piling density larger than or equal to 450 kg*m<-3> is obtained through spraying drying. The high-dispersivity fluorescent whitening agent product prepared by the invention has the advantages of convenient use, long storage time, easy transportation and no dust pollution, and has high dispersivity in water, the dispersivity can be more than or equal to 50 percent in 2 min and can be more than 80 percent in 10 min, and the high-dispersivity fluorescent whitening agent can be widely used in washing industry. Formula is shown as the accompanying drawing.

Description

technical field [0001] The invention relates to a fluorescent whitening agent used in the washing industry, in particular to a granular fluorescent whitening agent composition with high dispersibility. The invention also relates to a preparation method of the fluorescent whitening agent. Background technique [0002] Optical brighteners used in the commercial laundry industry are usually powder or liquid products. Powder type fluorescent whitening agent has the problem of dust pollution in the process of manufacture and use; liquid fluorescent whitening agent can solve the problem of dust pollution, but its transportation is inconvenient, the packaging cost is high, and the stability is poor, and the storage time is short. Granular fluorescent whitening agent can avoid the problems of the above two dosage forms. It is easy to dissolve, has no dust pollution, and has the characteristics of long storage time. It is an advanced and environmentally friendly dosage form. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/42C09B67/04C09B23/14C11D3/42
Inventor 季东峰王运科
Owner 山西晋光化工有限公司
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