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Catechin formaldehyde scavenger and preparation method thereof

A formaldehyde scavenger and catechin technology, applied in the field of indoor purification and removal of formaldehyde, can solve the problems of inapplicable formaldehyde removal, easy desorption, secondary pollution, etc., and achieve simple and environmentally friendly preparation process, simple and practical use process, and remarkable effect Effect

Pending Publication Date: 2021-02-23
中科恩吉瑞特(烟台)科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption method is simple and easy to use, but the adsorption effect of the small molecule adsorption method for formaldehyde is poor and there is a problem that it is easy to desorb after adsorption, causing secondary pollution; there are many by-products in the catalytic oxidation method, and formaldehyde cannot be completely converted into water and carbon dioxide. , and some catalysts are expensive, not suitable for household and small-scale indoor use of formaldehyde removal; plasma technology for formaldehyde removal needs to be carried out under high pressure, and the removal effect of low-concentration formaldehyde is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 2g of 90% pure EC powder, 0.1g of ferrous chloride to prevent oxidation of catechins, and 97.9g of deionized water into the vacuum reactor, heat to 40°C and stir at 500rpm for 30 minutes until the two are completely Dissolve, then add tartaric acid to adjust the pH to 3.0, stir at 300 rpm for 3-5 minutes, and mix the solution evenly to obtain a solution with a catechin content of 2%, that is, a catechin formaldehyde scavenger.

[0029] According to the test method specified in the national standard GB / T 35239-2017, after testing, the formaldehyde scavenger prepared in this example has a scavenging rate of 65.4% for indoor formaldehyde.

Embodiment 2

[0031] Add 7g of EGC powder with 95% purity, 0.1g of sodium thiosulfate to prevent oxidation of catechins, and 92.9g of deionized water into the vacuum reactor, heat to 45°C and stir at 500rpm for 30 minutes until the two are completely Dissolve, then add citric acid to adjust the pH to 4.0, and stir at 300 rpm for 3-5 minutes to mix the solution evenly to obtain a solution with a catechin content of 7%, that is, a catechin formaldehyde scavenger.

[0032] According to the test method specified in the national standard GB / T 35239-2017, after testing, the formaldehyde scavenger prepared in this example has a scavenging rate of 72.8% for indoor formaldehyde.

Embodiment 3

[0034] Add 10g of EGCG powder with 95% purity, 0.2g of sodium thiosulfate to prevent oxidation of catechin, and 89.8g of deionized water into the vacuum reactor, heat to 50°C and stir at 500rpm for 30 minutes until the two are completely Dissolve, then add lactic acid to adjust the pH to 3.0, and stir at a speed of 300 rpm for 3-5 minutes until the solution is uniformly mixed to obtain a solution with a catechin content of 10%, that is, a catechin formaldehyde scavenger.

[0035] According to the test method specified in the national standard GB / T 35239-2017, after testing, the formaldehyde scavenger prepared in this example has a scavenging rate of 85% for indoor formaldehyde.

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PUM

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Abstract

The invention relates to a catechin formaldehyde scavenger and a preparation method thereof, and belongs to the technical field of indoor purification and formaldehyde removal. The catechin formaldehyde scavenger comprises the following raw materials in parts by weight: 2-15 parts of catechin, 1-15 parts of an acidity regulator, 0.1-2 part of an antioxidant reagent and 60-100 parts of water. The invention also discloses a preparation method of the catechin formaldehyde scavenger, which comprises the following steps: 1. mixing: adding catechin and the antioxidant reagent into water, and sufficiently stirring and uniformly mixing, and 2, adding an acidity regulator to adjust the pH value, and uniformly stirring to prepare the catechinic acid formaldehyde scavenger. The formaldehyde removal agent is simple and environment-friendly in preparation process, remarkable in formaldehyde removal effect, green and environment-friendly in formula component, easy to obtain, simple and practical inuse process, capable of being directly sprayed to places needing formaldehyde removal, and very suitable for indoor formaldehyde removal.

Description

technical field [0001] The invention relates to a catechin formaldehyde scavenger and a preparation method thereof, belonging to the technical field of indoor purification and formaldehyde removal. Background technique [0002] Indoor formaldehyde mainly comes from decoration paint, wood-based panels, furniture, carpets, etc. These materials contain a large amount of urea-formaldehyde resin, phenolic resin, melamine-formaldehyde resin, etc. These resins will slowly decompose and release formaldehyde during use, and the release period is long Up to 3-15 years, causing long-term indoor air pollution. Long-term exposure to low-concentration formaldehyde can cause damage to the human nervous system, immune system, respiratory system, and liver, leading to poisoning symptoms such as dizziness, fatigue, lethargy, loss of appetite, and vision loss, and may also lead to cancer and leukemia. The World Health Organization (WHO) and the International Agency for Research on Cancer (IAR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/72
CPCB01D53/78B01D53/72B01D2258/06
Inventor 杨运国张金玲
Owner 中科恩吉瑞特(烟台)科技发展有限公司
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