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Preparation method of formaldehyde scavenger

A formaldehyde scavenger, a certain amount of technology, applied in the field of preparation of environmental protection materials, can solve the problem that photocatalytic materials cannot meet the requirements, and achieve good photocatalytic effect

Inactive Publication Date: 2018-12-21
龚娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Removing formaldehyde has become an urgent need in the current society. The current methods of removing formaldehyde include: physical methods and chemical methods, such as plant extracts, activated carbon, photocatalytic technology, etc. Among them, photocatalytic technology is a very important category, but single The photocatalytic material usually can't meet the requirements, many researchers are devoted to the research of removing formaldehyde functional material, for example: CN104857846A has reported a kind of diatomite load formaldehyde scavenger, its component includes activated carbon load manganese oxide, formaldehyde capture agent, Diatomite loaded titanium dioxide, nano-silver colloid and water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: prepare a kind of formaldehyde scavenger according to the following steps.

[0011] Step 1: In 100mL of 37% hydrochloric acid HCl, add 80.3g of titanium n-butoxide Ti(OC 4 h 9 ) 4 , 3.8g zinc oxide ZnO and 7.0g heptahydrate cerium trichloride CeCl 3 •7H 2 O, stirred for 2h to prepare complex A;

[0012] Step 2: Add 62.8g of molecular sieve SBA-15 to compound A, ultrasonically disperse for 2 hours, distill under reduced pressure, absorb with a liquid caustic soda NaOH solution with a mass concentration of 30%, and obtain a filter cake. After 120 o C drying 12h, 650 o C was calcined for 8h and naturally cooled to obtain composite B;

[0013] Step 3: At 60 o Under the condition of C water bath, add 40 mL of disodium hydrogen phosphate Na 2 HPO 4 , 5.9g of polyethylene glycol PEG-4000 and 11.8g of polyvinyl alcohol, stirred for 1h, and added dropwise 20mL of silver nitrate AgNO with a molar concentration of 0.1mol / L 3 solution, ultrasonically reacted...

Embodiment 2

[0015] Embodiment 2: prepare a kind of formaldehyde scavenger according to the following steps.

[0016] Step 1: In 100mL mass concentration of 37% hydrochloric acid HCl, add 80.3g titanium isobutoxide Ti(OC 4 h 9 ) 4 , 5.8g zinc oxide ZnO and 13.2g heptahydrate cerium trichloride CeCl 3 •7H 2 O, stirred for 3h to prepare complex A;

[0017] Step 2: Add 125.7g molecular sieve SBA-15 to compound A, ultrasonically disperse for 3h, distill under reduced pressure, absorb with a liquid caustic soda NaOH solution with a mass concentration of 30%, and obtain a filter cake. o C drying 8h, 800 o C was calcined for 6h and cooled naturally to obtain composite B;

[0018] Step 3: At 80 o Under the condition of C water bath, add 120 mL of disodium hydrogen phosphate Na with a molar concentration of 0.1 mol / L to 800 mL 2 HPO 4 , 11.8g of polyethylene glycol PEG-10000 and 23.6g of polyvinyl alcohol, stirred for 2h, and added dropwise 60mL of silver nitrate AgNO with a molar concentr...

Embodiment 3

[0020] Embodiment 3: prepare a kind of formaldehyde scavenger according to the following steps.

[0021] Step 1: In 100mL of 37% hydrochloric acid HCl, add 80.3g of titanium n-butoxide Ti(OC 4 h 9 ) 4 , 4.8g zinc oxide ZnO and 10.1g heptahydrate cerium trichloride CeCl 3 •7H 2 O, stirred for 2.5h to obtain complex A;

[0022] Step 2: Add 94.3g molecular sieve SBA-15 to compound A, ultrasonically disperse for 2.5h, distill under reduced pressure, absorb with a liquid caustic soda NaOH solution with a mass concentration of 30%, and obtain a filter cake. After 135 o C drying 10h, 700 o C was calcined for 7 hours and cooled naturally to obtain composite B;

[0023] Step 3: At 80 o Under the condition of C water bath, add 80 mL of disodium hydrogen phosphate Na 2 HPO 4 , 8.8g polyethylene glycol PEG-8000 and 17.7g polyvinyl alcohol, stirred for 1.5h, and added dropwise 40mL silver nitrate AgNO with a molar concentration of 0.1mol / L 3 solution, ultrasonically reacted for 2...

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Abstract

The invention discloses a preparation method of a formaldehyde scavenger. The preparation method comprises the steps of: adding titanium alkoxide, zinc oxide and cerium trichloride heptahydrate in a certain mass concentration of hydrochloric acid and stirring for a period of time to obtain a compound A; adding molecular sieve SBA-15 to the compound A, ultrasonically dispersing for a period of time, performing reduced pressure distillation, and absorbing with a certain mass concentration of liquid alkali solution to obtain a filter cake; after drying, calcining, and natural cooling, thus obtaining a compound B; in a water bath condition, adding disodium hydrogen phosphate, polyethylene glycol and polyvinyl alcohol to a certain amount of water, stirring for a period of time, dropwise addinga silver nitrate solution, and ultrasonically reacting for a period of time to obtain a compound C; adding kieselguhr and the compound B to the compound C, stirring, grinding, filtering, and drying toobtain a formaldehyde scavenger D. The formaldehyde scavenger has the advantages of environmental protection and high efficiency in removing formaldehyde.

Description

technical field [0001] The invention belongs to the preparation technology of environment-friendly materials, in particular to a preparation method of formaldehyde scavenger. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent smell, which is extremely harmful to the human body, such as affecting the human respiratory tract, digestive tract and skin, thereby causing blood diseases, cancer, deformities and other diseases. The harm of formaldehyde has attracted the attention of the whole society. [0003] Removing formaldehyde has become an urgent need in the current society. The current methods of removing formaldehyde include: physical methods and chemical methods, such as plant extracts, activated carbon, photocatalytic technology, etc. Among them, photocatalytic technology is a very important category, but single The photocatalytic material usually can't meet the requirements, many researchers are devoted to the research of removing formald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72
CPCB01D53/8668B01D2255/104B01D2255/2065B01D2255/20707B01D2255/20792B01D2255/802
Inventor 龚娟
Owner 龚娟
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