Preparation method of carbon dioxide absorbent

A carbon dioxide and absorbent technology, applied in the medical field, can solve problems such as strong corrosion, difficult detection by detectors, and easy injury, etc., to achieve the goal of reducing corrosion, reducing oxidation rate and electrochemical corrosion, and prolonging the use time Effect

Inactive Publication Date: 2015-07-29
ANHUI YOUNG HEARTY MEDICAL APPLIANCE & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorbent coated on the absorbent sheet must be a liquid solution, but calcium oxide and calcium hydroxide are slightly soluble in water and both absorb CO 2 and water to form a hard block of calcium carbonate (including part of calcium bicarbonate), part of 14 C soft beta rays are wrapped, and the detector is not easy to detect; sodium oxide dissolves in water and reacts violently, causing water to boil to form sodium hydroxide solution, which is easy to hurt people during operation; sodium hydroxide and potassium hydroxide dissolve in water to release heat but can be Control, but the corrosion is relatively strong, careless contact will cause harm to the human body, and absorb CO 2 After mixing with water, sodium carbonate (may contain part of sodium bicarbonate) and potassium carbonate (may contain part of potassium bicarbonate) are generated respectively. Sodium carbonate and potassium carbonate are very easy to absorb moisture and form hard lumps. 14 C soft beta rays are wrapped, and the detector is not easy to detect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a carbon dioxide absorber, comprising the steps of:

[0023] 1) Dissolve calcium nitrate, magnesium nitrate and citric acid in de-sodium hydroxide solution and stir at 25°C until completely dissolved to form a mixed solution. The molar ratio of calcium nitrate, magnesium nitrate, citric acid and sodium hydroxide is 1.2: 1.5:0.8:1;

[0024] 2) Add ethylene glycol to the mixed solution and stir it in a water bath at a constant temperature of 70°C to form a paste, then evaporate and dehydrate to form a gel. The molar ratio of ethylene glycol to the mixed solution is 0.5:1;

[0025] 3) and drying in an oven at 150°C to obtain a gel block;

[0026] 4) Grinding the gel block to obtain a solid powder and calcining at 800°C for 2 hours;

[0027] 5) Dissolve the solid powder in sodium hydroxide solution, stir at 25°C until completely dissolved to form a mixed solution, add additives, the additives include organic amine solution, organic strontium solutio...

Embodiment 2

[0030] A method for preparing a carbon dioxide absorber, comprising the steps of:

[0031] 1) Dissolve calcium nitrate, magnesium nitrate and citric acid in de-sodium hydroxide solution and stir at 35°C until completely dissolved to form a mixed solution. The molar ratio of calcium nitrate, magnesium nitrate, citric acid and sodium hydroxide is 1.2: 1.5:0.8:1;

[0032] 2) Add ethylene glycol to the mixed solution and stir it in a water bath at a constant temperature of 78°C to form a paste, then evaporate and dehydrate to form a gel. The molar ratio of ethylene glycol to the mixed solution is 0.8:1;

[0033] 3) and drying in an oven at 170°C to obtain a gel block;

[0034] 4) Grinding the gel block to obtain a solid powder and calcining at 900°C for 5 hours;

[0035] 5) Dissolve solid powder in sodium hydroxide solution, stir at 35°C until completely dissolved to form a mixed solution, add additives, additives include organic amine solution, organic strontium solution and st...

Embodiment 3

[0038] A method for preparing a carbon dioxide absorber, comprising the steps of:

[0039] 1) Dissolve calcium nitrate, magnesium nitrate and citric acid in de-sodium hydroxide solution and stir at 30°C until completely dissolved to form a mixed solution. The molar ratio of calcium nitrate, magnesium nitrate, citric acid and sodium hydroxide is 1.2: 1.5:0.8:1;

[0040] 2) Add ethylene glycol to the mixed solution and stir it in a water bath at a constant temperature of 75°C to form a paste, then evaporate and dehydrate to form a gel. The molar ratio of ethylene glycol to the mixed solution is 6.5:1;

[0041] 3) and drying in an oven at 160°C to obtain a gel block;

[0042] 4) Grinding the gel block to obtain a solid powder and calcining at 850°C for 3.5 hours;

[0043] 5) Dissolve the solid powder in sodium hydroxide solution, stir at 30°C until completely dissolved to form a mixed solution, add additives, the additives include organic amine solution, organic strontium solut...

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PUM

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Abstract

The invention discloses a preparation method of a carbon dioxide absorbent. Calcium nitrate, magnesium nitrate and citric acid are dissolved in a sodium hydroxide solution, ethylene glycol is added to a mixed solution to form gel, the gel is dried in an oven, a gel block is obtained and ground, solid powder is obtained, the carbon dioxide absorbent is prepared, and an additive is added and comprising an organic amine solution, an organic strontium solution and strontium salt. The carbon dioxide absorbent has higher carbon dioxide cycle absorption efficiency and also has higher anti-sintering performance and excellent pore structure distribution, so that the carbon dioxide absorbent still has higher carbon dioxide catching efficiency in the repeated circulating calcination/carbonation reaction process.

Description

technical field [0001] The invention relates to the medical field, in particular to a preparation method of a carbon dioxide absorbent. Background technique [0002] Card-type Helicobacter pylori detector is a special 14 C-A diagnostic instrument for urea breath test, it can test the collected breath sample CO 2 to measure, to measure 14 The radioactivity of C can diagnose the presence and extent of Helicobacter. This detector uses a disposable carbon dioxide gas collection card to collect exhaled breath, and the gas collection card contains an absorbent sheet for absorbing carbon dioxide. [0003] Absorbents for carbon dioxide generally include calcium oxide, calcium hydroxide, sodium oxide, sodium hydroxide, and potassium hydroxide. The absorbent coated on the absorbent sheet must be a liquid solution, but calcium oxide and calcium hydroxide are slightly soluble in water and both absorb CO 2 and water to form a hard block of calcium carbonate (including part of calciu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/62
CPCY02A50/20
Inventor 陈世雄汪熙程张杨
Owner ANHUI YOUNG HEARTY MEDICAL APPLIANCE & EQUIP
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