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Purificant for adsorbing formaldehyde and method of preparing the same

A formaldehyde adsorption and purifying agent technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as failure to meet purification requirements, and achieve the effect of improving structure and polarity and enhancing adsorption capacity

Inactive Publication Date: 2008-10-08
张宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that indoor pollutants contain a large number of pollutants of different types and properties such as formaldehyde, benzene, toluene, xylene, ammonia, carbon monoxide, sulfur dioxide, and benzodiazepines. The purification requirements are obviously not met by activated carbon adsorption alone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Preparation and performance evaluation of adsorbent A

[0020] Weigh 11.00g of potassium permanganate and place it in a beaker, add 100mL of deionized water, heat to 40-80°C and stir to dissolve, the concentration of potassium permanganate is 0.5%-12.5%, and the solution is dark purple. Weigh 120g of activated alumina powder and add it to the potassium permanganate solution, stir for 2 hours under the condition of heating and heat preservation at about 50°C, filter and dry at 110°C, grind it with a mortar and prepare it for later use, count as adsorbent A .

[0021] Use an analytical balance to accurately weigh about 5.0000g of adsorbent A and place it in a closed device, use a pipette to measure 1.00mL of formaldehyde and add it to the glass airtight cabin; seal the hatch, and then seal the hatch again after evacuating for 5 minutes, start timing. Take out the adsorbent after 8 hours, and weigh again accurately. The mass difference between the two times...

Embodiment 2

[0022] Example 2: Preparation and Activity of Adsorbent B

[0023] Weigh 11.00 g of potassium permanganate and place it in a beaker, add 100 mL of deionized water, heat to 60°C and stir to dissolve, the solution is dark purple. Weigh 120g of molecular sieve powder and add it to potassium permanganate solution, stir for 2 hours under the condition of heat preservation and 30°C, filter and coax dry at 100°C, grind it with a mortar and set aside, count as adsorbent B.

[0024] The method in Example 1 was used to measure the adsorption capacity of the adsorbent for formaldehyde, and the results are listed in Table 1.

Embodiment 3

[0025] Embodiment 3: the preparation of adsorbent C

[0026] Weigh 11.00 g of potassium permanganate and place it in a beaker, add 100 mL of deionized water, heat to 60°C and stir to dissolve, the solution is dark purple. Weigh 180g of sepiolite powder and add it to the potassium permanganate solution, stir for 5 hours under the conditions of heating and heat preservation at about 40°C, filter and coax it dry at 120°C, grind it with a mortar and prepare it for later use, count as adsorbent C .

[0027] Carry out the adsorption purification effect test of formaldehyde by the method in embodiment 1, the result is listed in table 1.

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Abstract

The invention relates to a formaldehyde purificatory absorbent and a preparation method thereof, which belongs to the technical field of a purificant and a preparation method thereof. The formaldehyde purificatory absorbent uses a porous material as a carrier and the carrier is one or more of activated alumina, sea-foam and zeolite molecular sieve. The preparation method relates to that a steeping fluid is placed into a beaker, added with carrier powders at a steeping temperature ranging from 20 DEG C to 60 DEG C, stirred for 2 through 6 hours, dried at the temperature ranging from 100 DEG C to 140 DEG C after being filtrated and then porphyrized with a mortar. The steeping fluid adopts a strong oxidizer potassium permanganate and is diluted to an acid solution and an organic amine solution of 3 to 8 percent by de-ionized water. The method of the invention adopts the strong oxidizer as an active component and carries out the steeping of the carrier after the active component is coordinated with the solution, when the active component is of even load bearing, thus being able to oxidize the adsorbed formaldehyde molecule to be carbon dioxide desorption and forming the cycle adsorption to enlarge the adsorption capacity thereof. Besides, the method of the invention adopts the acid solution and the organic amine to carry out the steeping modification of the carrier, which improves the characteristics of the carrier, like the structure in the pores or on the surface, the polarity and so on, and enhances the adsorption ability to formaldehyde.

Description

1. Technical field [0001] The invention relates to a formaldehyde adsorption purification agent and a preparation method thereof, belonging to the technical field of purification agents and preparation methods thereof. 2. Background technology [0002] Formaldehyde is an important organic raw material, mainly used in the plastic industry (such as phenolic resin, urea-formaldehyde plastic - electric jade), synthetic fiber (such as synthetic vinylon - polyvinyl formal), leather industry, medicine, dyes, etc. Forma has bactericidal and antiseptic capabilities, and can be soaked into biological specimens. Its dilute solution (0.1-0.5%) can be used for soaking and disinfecting seeds in agriculture. Formaldehyde is a colorless, pungent, irritating gas with a low boiling point and volatile properties. Its aqueous solution is called formalin, which can denature proteins. It is often used as a preservative in medicine. In our daily life, formaldehyde is a major killer of health, and...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/30
Inventor 李晓强张宏兰丽娟
Owner 张宏
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