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Composite absorbing agent for processing hydrogen phosphide gas and preparation method thereof

An absorbent, phosphine technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of harsh reaction conditions, many reaction conditions, complex equipment, etc., and achieve convenient and simple post-processing. , good absorption effect

Inactive Publication Date: 2013-06-12
田琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic oxidation method can effectively treat phosphine gas, but due to the many reaction conditions to be controlled (temperature, pressure, pH value, catalyst concentration, gas flow ratio, etc.), the corresponding equipment is more complicated and relatively Difficult to industrialize
Although the adsorption method can also effectively purify phosphine gas, the following problems generally exist in the adsorption method: (1) The regeneration process of the adsorbent is often complicated
Because the adsorbent is expensive, it is necessary to arrange a process to regenerate the adsorbent, so this undoubtedly increases the investment in equipment
(2) The reaction conditions are relatively harsh, and usually need to raise the temperature, adjust the pH, etc., so it is necessary to introduce a lot of additional equipment such as coolers, pH sensors, etc.
However, this kind of absorbent is still in liquid state, and there are also disadvantages such as waste liquid and precipitation during use, and small absorption capacity.

Method used

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  • Composite absorbing agent for processing hydrogen phosphide gas and preparation method thereof
  • Composite absorbing agent for processing hydrogen phosphide gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this embodiment, the raw materials of the composite solid absorbent for processing phosphine gas are constituted in parts by mass: 75 parts of potassium hypochlorite, 20 parts of sawdust, 2 parts of activated carbon powder, 1 part of graphite powder, and 2 parts of talcum powder;

[0027] The composite solid absorbent used to treat phosphine gas in this example is obtained by stirring and mixing by the equal multiplication method, and the specific operation steps are as follows:

[0028] Add activated carbon powder, graphite powder and talcum powder to the mixer under normal temperature and pressure, and mix well to obtain mixture a. Add wood chips to mixture a several times. The volume of wood chips added each time is equal to the volume of the material in the mixer. The volumes are equal, and after each sawdust is added, stir at a speed of 30 rpm for 10 minutes until all the sawdust is added to obtain mixture b;

[0029] Add potassium hypochlorite to the mixture b ...

Embodiment 2

[0033] In this embodiment, the raw materials of the composite solid absorbent for processing phosphine gas are constituted by mass parts: 85 parts of bleaching powder, 10 parts of sawdust, and 5 parts of activated carbon powder;

[0034] The composite solid absorbent used to treat phosphine gas in this example is obtained by stirring and mixing by the equal multiplication method, and the specific operation steps are as follows:

[0035] Add activated carbon powder to the mixer under normal temperature and pressure and stir evenly to obtain mixture a. Add wood chips to mixture a several times. The volume of wood chips added each time is equal to the volume of the material in the mixer. Add wood chips each time Finally, stir at a speed of 30 rpm for 10 minutes until all the sawdust is added to obtain the mixture b;

[0036] Add the bleaching powder several times to the mixture b. The volume of the bleaching powder added each time is equal to the volume of the material in the mix...

Embodiment 3

[0040] In this embodiment, the raw materials of the composite solid absorbent for processing phosphine gas are constituted in parts by mass: 75 parts of bleaching powder, 20 parts of sawdust, 2.5 parts of graphite powder, and 2.5 parts of talcum powder;

[0041] The composite solid absorbent used to treat phosphine gas in this example is obtained by stirring and mixing by the equal multiplication method, and the specific operation steps are as follows:

[0042] Add graphite powder and talcum powder to the mixer under normal temperature and pressure, and mix well to obtain mixture a. Add wood chips to mixture a several times, and the volume of the wood chips added each time is equal to the volume of the material in the mixer. Stir at a speed of 30 rpm for 10 minutes after each sawdust is added, until all the sawdust is added to obtain mixture b;

[0043] Add the bleaching powder several times to the mixture b. The volume of the bleaching powder added each time is equal to the vol...

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Abstract

The invention discloses a composite absorbing agent for processing hydrogen phosphide gas and a preparation method thereof. The raw materials of the composite absorbing agent for processing hydrogen phosphide gas comprise the following components of: by weight, 75-90% of an oxidizing agent, 5-20% of a leavening agent, 0-5% of an absorbing agent, 0-2.5% of an anti-caking agent and 0-2.5% of a dispersing agent. The composite solid absorbing agent is produced by stirring and mixing the above raw materials by equivalence multiplication method. The composite solid absorbing agent is an absorbing agent special for hydrogen phosphide gas, has high absorption efficiency and large absorption capacity, is easy for gases to permeate and is easy to store and transport; the solid residue produced after absorbing hydrogen phosphide gas is easy to process or can be used as the raw material of phosphate fertilizer, thus generating no second pollution.

Description

1. Technical field [0001] The invention relates to a poisonous gas absorbent and a preparation method thereof, in particular to a composite solid absorbent for treating phosphine gas and a preparation method thereof. 2. Background technology [0002] Phosphine (PH 3 ) is a colorless, foul-smelling gas at normal temperature and pressure, mainly produced in grain warehouse fumigation and insecticide, yellow phosphorus production, magnesium powder preparation, acetylene production, sodium hypophosphite production, semiconductor industry and sludge deposition and other processes middle. Phosphine gas is highly toxic. When the phosphine content in the air reaches 0.01mg / L, it will cause poisoning. Adults will die if they are exposed to a concentration of 0.05mg / L for 0.5 to 1 hour. Therefore, the gas containing phosphine must be treated before it can be discharged. [0003] There are many purification methods for phosphine, the most common ones are catalytic oxidation, adsorpt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/46
Inventor 田琳
Owner 田琳