Preparation method of adsorbent for purifying hydrogen sulfide, hydrogen phosphide and arsenic hydride simultaneously

An adsorbent and phosphine technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of large-pore adsorbent preparation methods that have not been reported, achieve high selective adsorption performance, and be easy to use Effects of regeneration and easy operation

Active Publication Date: 2016-01-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few reports on the removal of two of the three gases, while the simultaneous adsorption and removal of H 2 S.PH 3 and AsH 3 The preparation method of the large pore size adsorbent has not been reported

Method used

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  • Preparation method of adsorbent for purifying hydrogen sulfide, hydrogen phosphide and arsenic hydride simultaneously
  • Preparation method of adsorbent for purifying hydrogen sulfide, hydrogen phosphide and arsenic hydride simultaneously
  • Preparation method of adsorbent for purifying hydrogen sulfide, hydrogen phosphide and arsenic hydride simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Dissolve concentrated sulfuric acid in distilled water at a ratio of 1mol / 1000ml, and stir until evenly mixed;

[0030](2) Add P123 to the solution in step (1) at a ratio of 5g / 100ml, and stir at 30°C for 60 minutes until the surfactant is completely dissolved;

[0031] (3) Add trimethylbenzene to the solution obtained in step (2) at a ratio of 1g / 100ml, and then add the solution obtained in step (2) to the mixed solution with a volume ratio of 10:1 to ethyl orthosilicate tetraethyl orthosilicate and stirred at 30°C for 6 hours;

[0032] (4) Pour the mixed solution obtained in step (3) into the reaction kettle, crystallize at 100°C for 72 hours, then wash the obtained powder with distilled water and filter until the test paper does not change color;

[0033] (5) Dry the solid substance obtained in step (4) at 150°C for 60 hours, and finally place the obtained white powder in a roasting furnace, raise the temperature to 600°C at 5°C / min for 2 hours, and cool natural...

Embodiment 2

[0038] (1) Dissolve concentrated hydrochloric acid in distilled water at a ratio of 2mol / 1000ml, and stir until evenly mixed;

[0039] (2) Add P123 to the solution in step (1) at a ratio of 15g / 100ml, and stir at 35°C for 20 minutes until the surfactant is completely dissolved;

[0040] (3) Add xylene to the solution obtained in step (2) at a ratio of 2g / 100ml, and then add orthosilicon to the mixed solution at a volume ratio of 14:1 between the solution obtained in step (2) and tetraethyl orthosilicate ethyl acetate and stirred at 35°C for 5 hours;

[0041] (4) Pour the mixed solution obtained in step (3) into the reaction kettle, crystallize at 110°C for 68 hours, then wash the obtained powder with distilled water and filter until the test paper does not change color;

[0042] (5) Dry the solid substance obtained in step (4) at 120°C for 12 hours, and finally place the obtained white powder in a roasting furnace, raise the temperature to 500°C at 4°C / min for 3 hours, and co...

Embodiment 3

[0047] (1) Dissolve concentrated nitric acid in distilled water at a ratio of 3mol / 1000ml, and stir until evenly mixed;

[0048] (2) Add F127 to the solution in step (1) at a ratio of 20g / 100ml, and stir at 40°C for 30 minutes until the surfactant is completely dissolved;

[0049] (3) Add ethylenediamine to the solution obtained in step (2) at a ratio of 3g / 100ml, and then add ortho Ethyl silicate and stirred at 40°C for 4 hours;

[0050] (4) Pour the mixed solution obtained in step (3) into the reaction kettle, crystallize at 120°C for 50 hours, then wash the obtained powder with distilled water and filter until the test paper does not change color;

[0051] (5) Dry the solid substance obtained in step (4) at 100°C for 30 hours, and finally place the obtained white powder in a roasting furnace, raise the temperature to 550°C at a rate of 3°C / min for 4 hours, and cool naturally to room temperature to obtain Adsorbent carrier;

[0052] (6) Add the dried adsorbent carrier in ...

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Abstract

The invention relates to a preparation method of an adsorbent for purifying hydrogen sulfide, hydrogen phosphide and arsenic hydride simultaneously, and belongs to the technical field of adsorbent preparation. The method comprises the steps that P123 or F127 is dissolved in a dilute acid solution and stirred till being dissolved, a certain number of pore-enlarging agents are added, stirring and even mixing are carried out, ethyl orthosilicate is added, the mixture is poured into a reaction kettle after being stirred for 1-6 h, powder obtained after crystallization is washed with distilled water till the color of test paper is not changed, the dry powder obtained after drying is placed into a roaster to be roasted, temperature is naturally decreased to indoor temperature, an adsorbent carrier is obtained, the obtained carrier is dissolved in water, a certain amount of metal salt is added, filtering, drying and roasting are carried out, and then the large-aperture adsorbent is obtained. The preparation method is easy to implement, the metal salt impregnant is low in cost and easy to obtain, the desorption effect is good even at low temperature, and a wide development prospect is provided for simultaneous desulfurization, dephosphorization and dearsenization through a dry method.

Description

technical field [0001] The invention relates to a method for preparing an adsorbent for simultaneously purifying hydrogen sulfide, phosphine and arsine, and belongs to the technical field of adsorbent preparation. Background technique [0002] h 2 S and PH 3 Both are reducing gases, which are mainly produced in many industrial production processes and the decay process of organisms. They are directly discharged into the atmosphere without treatment, which will seriously threaten the surrounding environment and cause serious harm to human health. h 2 S and PH 3 They are all gases with foul smell. Due to their strong reducing properties, they can easily cause catalyst poisoning and deactivation, and they can corrode industrial production equipment after being dissolved in the meeting. In addition, H 2 S can also cause secondary pollution, the escaped H 2 S can form sulfur dioxide from oxygen, promote photochemical reactions, and eventually transform into sulfate aerosols...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02
Inventor 李凯李山宁平梅毅汤立红刘烨刘贵张贵剑宋辛王驰朱婷婷
Owner KUNMING UNIV OF SCI & TECH
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