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Methanal capturing agent and preparation method thereof

A formaldehyde scavenger and the technology of the preparation process are applied in the direction of deodorization and disinfection, which can solve the problems of unsuitable large-scale use, irritating odor, and secondary damage to the human body, and achieve low volatility, good compatibility, and high capture rate. high effect

Inactive Publication Date: 2011-06-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a formaldehyde scavenger and its preparation method to overcome the problems of high volatility, irritating odor, secondary damage to human body and unsuitable for large-scale use in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of formaldehyde scavenger is to prepare with gelatin as raw material, and described preparation process comprises the following steps successively,

[0022] Step 1: gelatin is hydrolyzed: prepare a gelatin solution with a mass concentration of 20%, adjust the pH to 8.5 with 20% diethanolamine aqueous solution, then add 0.3% alkaline protease (based on the mass of gelatin), heat up to 60°C, After reacting for 2 hours, raise the temperature to 100°C to inactivate the enzyme, and remove a small amount of impurities in a centrifuge to obtain gelatin hydrolyzate. This step exposes the gelatin to more amino and carboxyl groups.

[0023] Step 2: Dehydrate the above-mentioned gelatin hydrolyzate in a rotary evaporator at 80°C, and then add diethylenetriamine, the mass ratio of gelatin hydrolyzate and diethylenetriamine is 1:6 (based on gelatin hydrolyzate On a dry basis), react at 110°C for 4 hours, and then raise the temperature to 160°C after the reactio...

Embodiment 2

[0025] Embodiment 2: a kind of formaldehyde scavenger is to prepare with gelatin as raw material, and described preparation process comprises the following steps successively,

[0026] Step 1: gelatin is hydrolyzed: prepare a gelatin solution with a mass concentration of 50%, adjust the pH to 8.0 with 30% diethanolamine aqueous solution, then add 1.5% alkaline protease (based on the mass of gelatin), heat up to 40°C, After reacting for 6 hours, raise the temperature to 90°C to inactivate the enzyme, and remove a small amount of impurities in a centrifuge to obtain gelatin hydrolyzate;

[0027] Step 2: Dehydrate the above-mentioned gelatin hydrolyzate in a rotary evaporator at 100°C, and then add diethylenetriamine, the mass ratio of gelatin hydrolyzate and diethylenetriamine is 1:3 (based on gelatin hydrolyzate On a dry basis), react at 140°C for 2h, and after the reaction, raise the temperature to 180°C to remove unreacted diethylenetriamine, thereby preparing aminated gelati...

Embodiment 3

[0029] Embodiment 3: a kind of formaldehyde scavenger is to prepare with gelatin as raw material, and described preparation process comprises the following steps successively,

[0030] Step 1: Prepare a collagen solution with a mass concentration of 50%, adjust the pH to 7.0 with 20% diethanolamine aqueous solution, then add 1.0% trypsin (based on the mass of gelatin), heat up to 40°C, and heat up to 50°C after 4 hours of reaction. ℃, adjust the pH to 8.5 with 20% diethanolamine aqueous solution, add 0.1% alkaline protease (based on the mass of gelatin), react for 4 hours and then continue to heat up to 90 ℃ to inactivate the enzyme, remove a small amount of impurities in a centrifuge, That is gelatin hydrolyzate.

[0031] Further hydrolysis, this step mainly uses trypsin hydrolysis to expose more amino and carboxyl groups. Prepare a collagen solution with a mass concentration of 60%, adjust the pH to 7.0 with 20% diethanolamine aqueous solution, then add 2.0% trypsin (based ...

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PUM

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Abstract

The invention relates to the technical field of environment-friendly products, in particular to a formaldehyde scavenger and a preparation method thereof. The invention aims to solve the problems that the prior art is of high volatility, produces pungent odor, causes secondary damages to a human body, and is unsuitable for widespread utilization. In order to overcome the problems of the prior art, the technical scheme of the invention includes using gelatin which is taken as the raw material to prepare and obtain a formaldehyde scavenger. The preparation process comprises the following steps in sequence: step one, subjecting the gelatin to hydration; step two, preparing and obtaining aminated gelatin by subjecting gelatin digest to amino derivation modification; and step three, obtaining the formaldehyde scavenger by re-compounding the aminated gelatin obtained from the first step with amino-terminated hyper-branched polymer and chitosan according to the mass ratio of 0.8-1:0.8-1:0.8-1.

Description

Technical field: [0001] The invention relates to the technical field of environmental protection products, in particular to a formaldehyde scavenger and a preparation method thereof. Background technique: [0002] Formaldehyde is an important basic organic chemical raw material, which is widely used in pesticides (herbicides, insecticides, fungicides and fumigants), medicines (disinfection of medical and sanitation and production of some medicines), coatings, resins, papermaking, etc. With the improvement of living standards, interior decoration is in the ascendant, and formaldehyde, as an "invisible killer", has also entered people's living and working places. When the formaldehyde concentration is higher than 1mg / kg, it will cause harm to the human body. The U.S. Environmental Protection Organization, the National Safety and Health Agency and the Occupational Safety and Health Department all believe that formaldehyde is a potential carcinogen, and the hygienists at the U....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/30A61L9/01A62D101/28
Inventor 王学川任龙芳强涛涛罗媛媛
Owner SHAANXI UNIV OF SCI & TECH