A kind of microporous activated carbon for urea adsorption and its preparation method and application

An activated carbon and microporous technology, which is applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve the problems that cannot meet the needs of actual use, low urea adsorption capacity, etc., to simplify development and improve adsorption performance , solve the effect of low urea capacity

Active Publication Date: 2022-05-20
北京西峰科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently known activated carbon has a low adsorption capacity for urea, which cannot meet the needs of actual use.

Method used

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  • A kind of microporous activated carbon for urea adsorption and its preparation method and application
  • A kind of microporous activated carbon for urea adsorption and its preparation method and application
  • A kind of microporous activated carbon for urea adsorption and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example provides activated carbon and its preparation: KOH and 80-120 mesh coconut shell carbonized material are mixed evenly according to the mass ratio of 1.5, then placed in a tube furnace, heated to 850°C under a nitrogen atmosphere, and heated to 850°C according to the set time of 2.5 h keep warm. After cooling, wash away soluble matter with deionized water, place the obtained solid in 1M dilute hydrochloric acid, heat to 50°C, adjust to weakly acidic pH=6 or so, filter, wash with water until neutral, and store at 110°C After drying, activated carbon was obtained. The pore size parameters were characterized by BET analysis. The pore size parameters of the prepared activated carbon (KOH / C=1.5@850-2.5h) are shown in Table 1.

Embodiment 2

[0030] Using the same method as in Example 1, the difference is that the mass ratio of KOH to carbon material is 2, and the pore diameter parameters of the prepared activated carbon (KOH / C=2@850-2.5h) are shown in Table 1.

Embodiment 3

[0032] Using the same method as in Example 1, the difference is that KOH is replaced by CH 3 COOK, prepared activated carbon (CH 3 COOK / C=3@850-2.5h) See Table 1 for pore diameter parameters. The adsorption properties of activated carbon prepared under different conditions to urea are shown in Table 2 and figure 2 .

[0033] Table 1 comparative example and the aperture parameter of embodiment 1~3

[0034]

[0035]

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Abstract

The invention relates to a microporous activated carbon for urea adsorption and its preparation method and application. It is prepared by activating carbon material or activated carbon with an alkali metal compound, and the specific surface area of ​​the microporous activated carbon is >1500m 2 / g, micropore specific surface area>500m 2 / g, micropore volume>0.4cm 3 / g, the micropore diameter is 0.4~1.5nm. The microporous activated carbon provided by the invention has a high adsorption capacity for urea, and the activated activated carbon can be used for the adsorption of urea in the solution and the dialysate regeneration system, which greatly simplifies the development of mobile or wearable dialysis machines.

Description

technical field [0001] The invention relates to the field of preparation of urea adsorption materials, in particular to a microporous activated carbon for urea adsorption and its preparation method and application. Background technique [0002] When kidney function declines or is lost, various toxins in the body accumulate in the blood or tissues, causing serious damage to the body and threatening life. Hemodialysis and peritoneal therapy are effective treatments for renal failure, loss or replacement. Recent studies have shown that more frequent or continuous treatment is positively associated with better outcomes compared with conventional intermittent dialysis treatment. The development of portable or wearable dialysis machines, on the one hand, can achieve the purpose of continuous treatment and improve the treatment effect, on the other hand, it can help improve the quality of life of patients and save costs. Recycling the dialysate can greatly reduce the external wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D15/00A61M1/16A61M1/28
CPCB01J20/20B01J20/28066B01J20/2808B01J20/28071B01J20/28073B01D15/00A61M1/1696A61M1/28A61M1/287
Inventor 刘自军李建中
Owner 北京西峰科技有限责任公司
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