Formaldehyde removal agent and plasterboard with function of formaldehyde removal and their preparation methods

A formaldehyde remover, gypsum board technology, applied in separation methods, chemical instruments and methods, construction, etc., can solve problems such as poor effect, high price, secondary pollution, etc., achieve simple production process, good removal effect, and not easy to fall off Effect

Inactive Publication Date: 2014-04-30
杨晓莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products currently on the market and patented technology products have the problems of high price and poor effect. The amount of formaldehyde removal in a certain period of time is limited, and the durability of the effect is poor. Usually, the validity period is only a few days, and there are two times. contamination defect
For example, the formaldehyde removal agent disclosed in the patent application literature with the publication number CN1404891A is expensive because of the use of hydrazide compounds; the publication number is that a formaldehyde removal agent is disclosed in the invention patent application literature of CN1526470A, and its effect is not very satisfactory. , the removal rate of formaldehyde is only 78%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) prepare formaldehyde remover:

[0037] 1) Carry out orthophosphoric acid (concentration 85%) 80kg according to the following weight ratio

[0038] Citric acid 20kg

[0039] Urea 240kg

[0040] Melamine 30kg

[0041] Ammonium chloride 30kg

[0042] Ammonium sulfate 20kg

[0043] Sodium chloride 20kg

[0044] Polyvinyl alcohol (1799) 6kg

[0045] Acetyl ethyl acetate 0.6kg

[0046] 2) Add all the phosphoric acid, citric acid, urea and melamine in the above raw materials into a reactor filled with 50% of the total amount of distilled water, stir and mix evenly, heat up to 95°C, and react until the pH of the material=6.0 -7.0;

[0047] 3) Add polyvinyl alcohol (1799) while keeping the temperature at 95~C, and stir until completely dissolved:

[0048] 4) Cool down to 50-55~C, add remaining distilled water and all ammonium chloride, ammonium sulfate and sodium chloride, and keep warm for 30-40 minutes;

[0049] 5) Cool down to below 30°C, add all the acetyl ethy...

Embodiment 2

[0059] (1) prepare formaldehyde remover:

[0060] 1) Prepare raw materials according to the following weight ratio:

[0061] Deionized water 500kg Phosphoric acid (concentration 85%) 20kg

[0062] Formic acid (concentration 85%) 2kg

[0063] Urea 150kg

[0064] Dicyandiamide 50kg

[0065] Ammonium phosphate 10kg

[0066] Ammonium acetate 10kg

[0067] Potassium chloride 10kg

[0068] Polyvinyl alcohol (2099) 20kg

[0069] Acetyl ethyl acetate 5kg

[0070] 2) Add all the phosphoric acid, formic acid, urea and dicyandiamide in the above-mentioned raw materials to the reactor equipped with deionized water of 50% of the total amount, stir and mix evenly, heat up to 90~C, and react to the pH=6.0-7.0;

[0071] 3) Keep the temperature at 90°C and add polyvinyl alcohol, stir until completely dissolved;

[0072] 4) Cool down to 45-50°C, add the remaining deionized water and all ammonium phosphate, ammonium acetate and potassium chloride, and keep warm for 30-40 decibels;

[00...

Embodiment 3

[0083] (1) prepare formaldehyde remover:

[0084] 1) Prepare raw materials according to the following weight ratio:

[0085] Well water 650kg acetic acid (concentration (95%) 150kg

[0086] Formic acid (concentration 85%) 10kg

[0087] Urea 350kg

[0088] Dicyandiamide 30kg

[0089] Ammonium phosphate 80kg

[0090] Polyvinyl alcohol (1799) 10kg

[0091] Acetyl ethyl acetate 2.5kg

[0092] 2) Add all the acetic acid, formic acid, urea and dicyandiamide in the above raw materials to the reactor equipped with 50% of the total well water, stir and mix evenly, heat up to 105 ~ C, and react to the pH of the material =6.0-7.0;

[0093] 3) Keep the temperature at 105 ~ 0 and add polyvinyl alcohol, stir until completely dissolved;

[0094] 4) Cool down to 50-55°C, add the remaining well water and all the ammonium phosphate, and keep warm for 30-40 minutes;

[0095] 5) Cool down to below 30°C, add all the acetyl ethyl acetate, stir for 5-10 minutes, mix evenly, filter, and disc...

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PUM

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Abstract

The invention provides a formaldehyde removal agent, a plasterboard with a function of formaldehyde removal, and their preparation methods. The formaldehyde removal agent comprises, by weight, 500-650 parts of a dispersion medium, 20-160 parts of an acid compound, 100-400 parts of a polyamine compound, 10-80 parts of a salt compound, 5-20 parts of polyvinyl alcohol and 0.1-5 parts of ethyl acetoacetate. The formaldehyde removal agent has a low cost, is prepared by the simple preparation method and is convenient for use. The plasterboard has the function of formaldehyde removal, does not influence other performances of the plasterboard, can fast remove formaldehyde in the environment and has good and lasting formaldehyde removal effects.

Description

technical field [0001] The invention relates to a preparation for eliminating harmful chemical substances, a plate with the ability to remove harmful chemical substances and a preparation method thereof, in particular to a formaldehyde-removing preparation for gypsum boards, a gypsum board containing the preparation and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards, decoration and purchase of new furniture have become common things in people's lives. Various types of wood-based panels are often used in decoration and furniture manufacturing, such as plywood, blockboard, medium-density fiberboard, particle board, etc., and most of these wood-based panels are made of formaldehyde-based adhesives, mainly urea-formaldehyde resin adhesives. Release problem, often become the main source of formaldehyde pollution in indoor air. Moreover, although the formaldehyde emission of these wood-based panels will gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/81E04F13/14C04B41/65C04B41/63
Inventor 杨晓莉
Owner 杨晓莉
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