Formaldehyde catching agent, preparation method thereof and application thereof in formaldehyde removal

A formaldehyde scavenger, methyl technology, applied in fiber types, textiles and papermaking, fiber treatment, etc., to achieve the effect of low production cost, high formaldehyde elimination efficiency, and high affinity

Active Publication Date: 2016-07-06
东莞市中纺化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the country has strict restrictions on the amount of formaldehyde released from materials, due to cost and technical reasons, the use of formaldehyde cannot be completely avoided in the manufacturing process of some materials, so the top priority is to eliminate and reduce the hazards of formaldehyde

Method used

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  • Formaldehyde catching agent, preparation method thereof and application thereof in formaldehyde removal
  • Formaldehyde catching agent, preparation method thereof and application thereof in formaldehyde removal
  • Formaldehyde catching agent, preparation method thereof and application thereof in formaldehyde removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The amount of each raw material used in the preparation of the formaldehyde scavenger in this embodiment is as shown in Table 1, Example 1.

[0069] 1. Preparation of formaldehyde scavenger

[0070] Add various raw materials in the feeding stage to the reactor, the pH value is 4, and the temperature is raised to 85°C. After all the raw materials are completely dissolved, 10wt% ammonium persulfate aqueous solution is started to be added dropwise, and the temperature is maintained at 85-90°C during this process. After hours of dripping, continue to incubate at 90° C. for 4 hours. After the heat preservation is completed, cool down to 0-5°C with ice water, add the required sodium hypochlorite and sodium hydroxide, and react for 5 hours to obtain the formaldehyde scavenger.

[0071] The formaldehyde scavenger prepared in this example is a cross-linked polymer, and its structural units are shown in formula I, formula II, formula III and formula IV,

[0072]

[0073] In ...

Embodiment 2

[0082] The amount of each raw material used in the preparation of the formaldehyde scavenger in this embodiment is as shown in Table 1, Example 2.

[0083] 1. Preparation of formaldehyde scavenger

[0084] Add various raw materials in the feeding stage to the reactor, the pH value is 4, and the temperature is raised to 75°C. After all the raw materials are completely dissolved, 20wt% ammonium persulfate aqueous solution is started to be added dropwise, and the temperature is maintained at 75-80°C during this process. After 1 hour of dripping, continue to incubate at 80° C. for 4 hours. After the heat preservation is completed, cool down to 5-10°C with ice water, add the required sodium hypochlorite and sodium hydroxide, and react for 6 hours to obtain the formaldehyde scavenger.

[0085] The formaldehyde scavenger prepared in this example is a cross-linked polymer, and its structural units are shown in formula I, formula II, formula III and formula IV,

[0086]

[0087] I...

Embodiment 3

[0096] The amount of each raw material used in the preparation of the formaldehyde scavenger in this embodiment is as shown in Table 1, Example 3.

[0097] 1. Preparation of formaldehyde scavenger

[0098] Add various raw materials in the feeding stage to the reactor, the pH value is 4.5, and the temperature is raised to 65°C. After all the raw materials are completely dissolved, 30wt% ammonium persulfate aqueous solution is started to be added dropwise. During this process, the temperature is kept at 65-70°C. After 1 hour of dripping, continue to incubate at 70° C. for 5 hours. After the heat preservation is completed, cool down to 5-10°C with ice water, add the required sodium hypochlorite and sodium hydroxide, and react for 8 hours to obtain the formaldehyde scavenger.

[0099] The formaldehyde scavenger prepared in this example is a cross-linked polymer, and its structural units are shown in formula I, formula II, formula III and formula IV,

[0100]

[0101] In formu...

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PUM

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Abstract

The invention discloses a formaldehyde catching agent, a preparation method thereof and application thereof in formaldehyde removal. The formaldehyde catching agent is a micro-cross-linked polymer, and structural units of the formaldehyde catching agent are shown in the formula I, the formula II, the formula III and the formula IV. In the formula I and the formula II, R1 represents hydrogen or methyl, a represents a natural number ranging from 0 to 500, b represents a natural number ranging from 45 to 950, c represents a natural number ranging from 60 to 850, and d represents a natural number ranging from 1 to 12. R2 represents structural units shown in the formula V and / or the formula VI, x represents a natural number ranging from 1 to 12, y represents a natural number ranging from 1 to 12, and x+y=d. The amino group density of the formaldehyde catching agent is high, namely the value of a+ b+c is large because the amide group in the formula I, the primary amino group in the formula II and the secondary amino group in the formula III all can react with formaldehyde, wherein the activity of the primary amino group is the maximum, the activity of the secondary amino group take the second place, and the activity of the amide group is the minimum. The formaldehyde removal efficiency is high. The formaldehyde catching agent is of a ring structure, has high affinity for base material fibers such as fabrics and carpets and is easily adsorbed onto base materials actively during impregnated using.

Description

technical field [0001] The invention relates to a formaldehyde scavenger, a preparation method thereof and an application in removing formaldehyde, belonging to the field of chemical materials. Background technique [0002] Formaldehyde is the main substance of indoor air pollution at present. It is not only harmful, but also has a volatilization cycle of 3 to 15 years, and the harmful time is long, so it has been paid more and more attention by people. Free formaldehyde comes from a wide range of sources. Formaldehyde-containing urea-formaldehyde and phenolic resin adhesives are used in the manufacturing process of furniture, construction, and decoration materials. In the tanning and retanning of leather, a large amount of formaldehyde is used, and some formaldehyde will remain in the leather used as sofa and seat covering materials more or less. Composite sponges such as roof and seats in the car will release a large amount of formaldehyde, especially when they are lamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33C08F220/56C08F226/04C08F216/14D06M15/356D06M13/395D06M13/188A62D101/28D06M101/12D06M101/20D06M101/34D06M101/06
CPCA62D3/33A62D2101/28C08F220/56C08F226/04D06M13/188D06M13/395D06M15/3562D06M2101/06D06M2101/12D06M2101/20D06M2101/34C08F216/1416
Inventor 唐焕林袁东高殿权
Owner 东莞市中纺化工有限公司
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