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Preparation method of formaldehyde adsorbent

A technology of formaldehyde adsorption and preparation steps, which is applied in the field of preparation of formaldehyde adsorbents, can solve problems such as poor adsorption effect, and achieve the effects of removing formaldehyde, increasing porosity, and increasing specific surface area

Inactive Publication Date: 2017-09-15
田秋珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the defect of poor adsorption effect of the currently used formaldehyde adsorbent, a preparation method of formaldehyde adsorbent is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Weigh 3kg tofu, wash it with water 5 times, cut the washed tofu into 5cm 3 Spread the cut tofu pieces on a wooden board and place the wooden board in a dark place for 15 days to make the tofu pieces moldy naturally. Add the moldy tofu pieces and 2L of water to the stone mill for grinding Grind for 15 minutes to obtain a mixed slurry, mix the mixed slurry with 2kg of fresh milk and place it in a fermenter, control the temperature of the fermenter at 25°C, and ferment for 20 days in a sealed manner. In the sterilization box, sterilize at a temperature of 130°C for 20 minutes at a high temperature, put the sterilized material in a centrifuge, and centrifuge at a speed of 4000r / min for 15 minutes to obtain a supernatant, and place the supernatant in a rotary evaporator In the instrument, concentrated by rotary evaporation for 40 minutes to obtain a concentrated solution, then added 400mL of absolute ethanol to the concentrated solution, stirred and mixed for 30 minutes, the...

example 2

[0021] Weigh 2kg tofu, wash with water 3 times, cut the washed tofu into 3cm 3Spread the cut tofu pieces on a wooden board and place the wooden board in a dark place for 10 days to make the tofu pieces moldy naturally. Add the moldy tofu pieces and 1L of water to the stone mill for grinding Grind for 10 minutes to obtain a mixed slurry. Mix the mixed slurry with 1kg of fresh milk and place it in a fermenter. Control the temperature of the fermenter at 20°C and seal it for fermentation for 15 days. After the fermentation is over, put the material in the fermenter at high temperature In the sterilization box, sterilize at a temperature of 120°C for 15 minutes, put the sterilized material in a centrifuge, and centrifuge at a speed of 3000r / min for 10 minutes to obtain a supernatant, and put the supernatant in a rotary evaporator In the instrument, concentrated by rotary evaporation for 30 minutes to obtain a concentrated solution, then added 300mL of absolute ethanol to the conce...

example 3

[0023] Weigh 2kg tofu, wash it with water 4 times, cut the washed tofu into 4cm 3 Spread the cut tofu pieces on a wooden board, and place the wooden board in a dark place for 12 days to make the tofu pieces moldy naturally. Add the moldy tofu pieces and 1L of water to the stone mill for grinding Grind for 12 minutes to obtain a mixed slurry, mix the mixed slurry with 1kg of fresh milk and place it in a fermenter, control the temperature of the fermenter at 22°C, and ferment for 17 days in a sealed manner. In the sterilization box, sterilize at a temperature of 125°C for 17 minutes, put the sterilized material in a centrifuge, and centrifuge at a speed of 3500r / min for 12 minutes to obtain the upper layer, and place the upper layer in a rotary evaporation In the instrument, concentrated by rotary evaporation for 35 minutes to obtain a concentrated solution, then added 350mL of absolute ethanol to the concentrated solution, stirred and mixed for 27 minutes, then stood still for ...

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Abstract

The invention discloses a preparation method of a formaldehyde adsorbent, and belongs to the technical field of adsorbing materials. According to the preparation method, Tofu is taken as a raw material; natural mildewing of Tofu is realized, and then mildewed Tofu is mixed with fresh milk for fermentation; under the action of mucor, proteins in Tofu and milk are degraded into amino acids; diatomite is taken as a raw material, citric acid is adopted for impurity removing so as to increase the specific surface area and the porosity of diatomite; diatomite is loaded with guanidine sulfamate via acylation and esterification of guanidine sulfamate, so that crosslinking reaction of guanidine groups and hydroxy groups with formaldehyde is realized, bridged bonds are formed, and immobilization of formaldehyde is realized; and at last, modified diatomite and amino acids are subjected to immersion together so as to load diatomite with the amino acids via adsorption, reaction of amino groups and guanidine groups in the amino acids with formaldehyde is realized so as to form hydroxymethyl derivatives, and removing of formaldehyde is realized. The formaldehyde adsorbent possesses excellent adsorption effect; indoor air secondary pollution is avoided; service life is long; and the formaldehyde adsorbent is worthy of popularization and application.

Description

technical field [0001] The invention discloses a preparation method of a formaldehyde adsorbent, which belongs to the technical field of adsorbent materials. Background technique [0002] In recent years, with the gradual improvement of people's living standards, the problem of indoor air pollution has become increasingly prominent, which has aroused widespread concern from all walks of life. Formaldehyde, one of the main indoor air pollutants, can enter the human body through the respiratory system and skin, which is extremely harmful to the human body. Therefore, the purification of formaldehyde in indoor air is of great significance. [0003] Formaldehyde in life usually comes from decoration, decoration materials, furniture and coatings, etc., especially wood-based panels and the adhesives used. Artificial panels include decorative wood-based panels, plywood, particleboard, fiberboard, composite flooring, etc. In the production process, phenolic and urea-formaldehyde r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01D53/02
CPCB01J20/24B01D53/02B01D2253/25B01D2257/70B01D2258/06B01J20/14B01J2220/46B01J2220/4856
Inventor 吴兴旺王维李雪晴
Owner 田秋珍
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