Formaldehyde elimination agent and preparation method thereof

A technology of formaldehyde eliminating agent and dispersing agent, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as insufficient reaction and low formaldehyde removal rate, and achieve improved elimination effect, wide application range, and wide application easy effect

Inactive Publication Date: 2017-08-18
千藤(南京)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino acid formaldehyde scavengers mainly use amino acid and formaldehyde to react to form polymer compounds, but they have the disadvantages of insufficient reaction and low formaldehyde scavenging rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] 1. Preparation of silver-loaded nano anatase titanium dioxide:

[0057] B1, the anatase type titanium dioxide is immersed in the silver ammonia solution that is made of 2% silver nitrate solution and 2% ethylenediamine, and evaporated to dryness in a water bath;

[0058] B2, the product obtained in the above steps is calcined for 2 hours and reduced with hydrogen to obtain a silver-loaded nano anatase titanium dioxide finished product with a particle size of 15-30nm and a silver content of preferably 0.1-0.5%wt.

[0059] The chemical material used is commercially available anatase titanium dioxide, and the preferred model is Evonik P25.

[0060] 2. The preparation of polypeptide molecules refers to the patent CN1865279B "Preparation Method for Solid-Phase Polypeptide Synthesis of Thymopentin", which uses CTC resin as the starting material, Fmoc-protected amino acid as the monomer, and TBTU / HOBt as the condensation agent. Amino acids or derivatives, Boc-Arg-OH is used f...

Embodiment 1

[0064] Preparation of Alfa-cyclodextrin-grafted oligopeptides:

[0065] A1, using CTC resin as raw material, L-arginine, L-alanine, and L-glutamic acid with a molar ratio of 2:1:1 protected by Fmoc as monomers, and TBTU / HOBt as a condensation agent, After the peptide chain is made, add a peptide cutting reagent to cut the peptide, and then add ether to precipitate to make a crude product; separate and purify the above crude product through a C18 column to obtain a polypeptide molecule;

[0066] A2. Dissolve 4% Alfa-cyclodextrin in deionized water; add 0.05% coupling agent DDC and 15% polypeptide molecules in turn, stir and react at 25°C for 2 hours to complete polycondensation, filter and dry to obtain Alfa- Cyclodextrin-grafted oligopeptides.

[0067] A kind of preparation of formaldehyde eliminating agent:

[0068] S1. Mix 15% Alfa-cyclodextrin-grafted oligopeptide with 0.1% dispersant-alkyl dimethyl betaine, add it into deionized water, and stir for 20 minutes to prepare ...

Embodiment 2

[0072] The preparation method of the Alfa-cyclodextrin grafted oligopeptide and the preparation method of the formaldehyde scavenger in this embodiment are the same as in Example 1, and will not be repeated here; wherein:

[0073] The amino acid monomer in step A1 is L-arginine, L-methionine, L-lysine with a molar ratio of 2:1:1;

[0074] In step A2, the Alfa-cyclodextrin is 4%, the coupling agent DDC is 0.05%, the polypeptide molecule is 15%, the reaction temperature is 25°C, and the reaction time is 2 hours;

[0075] In step S1, the oligopeptide grafted with Alfa-cyclodextrin is 15%, the dispersant is 0.1% alkyl dimethyl betaine, and the stirring time is 20 minutes;

[0076] In the step S2, the stock solution of camphor fendourea is 0.1%, AEO3 is 0.3%, and the stirring time is 20 minutes;

[0077] In step S3, the silver-loaded nano anatase titanium dioxide is 1%, and the stirring time is 20 minutes.

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Abstract

The invention discloses a formaldehyde elimination agent and a preparation method thereof. The formaldehyde elimination agent comprises the following components in percentage by weight: 5-15% of Alfa-cyclodextrin grafted oligopeptide, 1-5% of silver-loaded nanometric anatase type titanium dioxide, 0.1-0.5% of phytoncide, 0.1-.05% of a dispersing agent, 0.1-0.5% of a penetrating agent and the balance of deionized water. The preparation method comprises the following steps: adding an Alfa-cyclodextrin grafted oligopeptide mixed dispersing agent into deionized water, and stirring, so that a mixed solution A is obtained; and adding a phytoncide stock solution and the penetrating agent into the mixed solution A, uniformly stirring, adding the silver-loaded nanometric anatase type titanium dioxide, and uniformly stirring, so that a finished product is obtained. The formaldehyde elimination agent disclosed by the invention has good permeability, and can deeply permeate into the interior of a material to further adsorb and degrade harmful substances at deep layers; and the used raw materials have the characteristics of extensive source, environmental friendliness, wide application range, low treatment cost, simplicity in application and no secondary pollution.

Description

technical field [0001] The invention relates to a scavenger and a preparation method thereof, in particular to a formaldehyde scavenger and a preparation method thereof, and belongs to the technical field of environmental protection materials. Background technique [0002] With the continuous improvement of people's life and economic level, following the "soot type" and "photochemical smog type" pollution, modern people have begun to enter the third pollution period marked by indoor air pollution. Moreover, with the improvement of housing conditions, modern people spend more and more time living indoors, with an average of about 90% of the time living and working indoors. Therefore, bad indoor environmental pollution will greatly threaten people's health. In 1989, the World Health Organization divided indoor organic pollutants into four categories according to the boiling points of compounds. There is no strict boundary between the four categories of pollutants according to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/72B01J20/26B01J20/30
CPCB01D53/72B01D53/76B01D2257/708B01J20/264
Inventor 范士亮邹婧吴振富刘凤彩
Owner 千藤(南京)环保科技有限公司
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