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Solidified concentrated sulfuric acid desiccant and its preparation method, application and regeneration method

A technology of concentrated sulfuric acid and desiccant, which is applied in the direction of chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of only drying gas and limited application range of concentrated sulfuric acid desiccant, and achieve the purpose of reducing oxidation and corrosion performance, improve drying conditions, and use more effective

Active Publication Date: 2019-06-21
SHANGLUO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to achieve the above object, the present invention provides a solidified concentrated sulfuric acid desiccant, which is convenient to use by changing the state of the concentrated sulfuric acid desiccant, and reduces the oxidative and corrosive properties of the concentrated sulfuric acid, thereby improving the utilization efficiency of the concentrated sulfuric acid desiccant , expand its drying application range, and solve the problem that the concentrated sulfuric acid desiccant in the prior art is limited in its application range and can only dry gas

Method used

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  • Solidified concentrated sulfuric acid desiccant and its preparation method, application and regeneration method
  • Solidified concentrated sulfuric acid desiccant and its preparation method, application and regeneration method

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Embodiment 1

[0030] The preparation method of the solidified concentrated sulfuric acid desiccant of the present invention specifically follows the following steps:

[0031] Step 1. Weigh each raw material: 184g (100ml) of 98% concentrated sulfuric acid, 120g of coal cinder powder, 10g of quartz powder, and 12g of loess powder;

[0032] Step 2. Add the weighed absorbent and binder into the reaction vessel, and stir until the mixture is uniform; then add the weighed concentrated sulfuric acid dropwise to the vessel at a constant speed for 18 minutes while stirring quickly. Make it into uniform, non-phase-adhesive solid particles; after the dripping, put it into a constant temperature drying oven, keep the temperature at 155°C for 115 minutes to prepare a mixture of solid particles with relatively stable performance. Solidified concentrated sulfuric acid A-1 desiccant, sealed and stored for later use.

Embodiment 2

[0034] The preparation method of the solidified concentrated sulfuric acid desiccant of the present invention specifically follows the following steps:

[0035] Step 1. Weigh each raw material: 184g (100ml) of 98% concentrated sulfuric acid, 130g brick powder, 30g quartz powder, and 10g clay powder;

[0036] Step 2. Add the weighed absorbent and binder into the reaction vessel, and stir until the mixture is uniform; then add the weighed concentrated sulfuric acid dropwise to the vessel at a constant speed for 15 minutes while stirring quickly. Make it into uniform, non-adhesive solid particles; after the dripping, put it in a constant temperature drying box, keep it at 150℃ and react for 120 minutes to prepare a solidified concentrated sulfuric acid A-2 desiccant, sealed and stored for later use .

Embodiment 3

[0038] The preparation method of the solidified concentrated sulfuric acid desiccant of the present invention specifically follows the following steps:

[0039] Step 1. Weigh each raw material: 184g (100ml) 98% concentrated sulfuric acid, 110g tailings powder, 10g quartz powder, 15g loess powder;

[0040] Step 2: Add the weighed absorbent and binder into the reaction vessel, and stir until the mixture is uniform; then add the weighed concentrated sulfuric acid dropwise to the vessel at a uniform speed for 20 minutes while stirring quickly. Make it into uniform, non-adhesive solid particles; after the dripping is finished, put it in a constant temperature drying oven, keep it at 160℃ for 110 minutes to prepare a solidified concentrated sulfuric acid A-3 desiccant, seal it and store it for later use .

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Abstract

The invention discloses a solid-state concentrated sulfuric acid drying agent and a preparation method, application and regeneration method thereof. The preparation method includes the steps of weighing all raw materials including concentrated sulfuric acid, absorbent and binder according to the mass ratio of concentrated sulfuric acid to absorbent to binder being 184:(120-160):(10-15), wherein the absorbent is one or more of coal cinder powder, quartz powder, tile powder and tailing powder, and the binder is loess powder or clay powder; adding the absorbent and the binder into a reaction container to be stirred; then dropwise adding the concentrated sulfuric acid into the container at constant speed for 15-20 min and meanwhile rapidly stirring to form uniform non-adhesive solid small particles; putting the materials in a constant-temperature drying oven after dropwise adding ends, and conducting heat preservation reaction for 110-120 min at 150-160 DEG C to obtain the solid-state concentrated sulfuric acid drying agent. The problems that in the prior art, the application range of the concentrated sulfuric acid drying agent is limited, and only gas can be dried are solved.

Description

Technical field [0001] The invention belongs to the technical field of chemical desiccants, and relates to a solid-state concentrated sulfuric acid desiccant and a preparation method, application and regeneration method thereof. Background technique [0002] Concentrated sulfuric acid is an important raw material for industrial production, and it is also a commonly used chemical reagent in laboratories of scientific research and teaching units. Concentrated sulfuric acid has an important chemical property: strong water absorption. It can not only absorb general free water (such as water in the air), but also absorb some crystal hydrates (such as CuSO 4 ·5H 2 O, Na 2 CO 3 ·10H 2 O) Water in. The principle is that sulfuric acid molecules combine with ready-made water molecules (free water) or crystal water to form sulfuric acid hydrates. Use this property to use concentrated H 2 SO 4 Make desiccant. In addition to not drying alkaline gases (such as NH 3 ), reducing gas (such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/28B01D53/26
CPCB01D53/263B01D53/28B01D2252/40B01D2252/60
Inventor 任有良陈凤英郭强朱凡李鹏飞
Owner SHANGLUO UNIV
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