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Production method of modified pressure swing adsorption silica gel

A pressure swing adsorption and production method technology, applied in the chemical industry, can solve the problem of CO2 adsorption to be increased, etc., and achieve the effects of improved mechanical strength and high specific surface area

Active Publication Date: 2017-01-04
RUSHAN DAYANG SILICA GEL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that the CO2 adsorption capacity of the products prepared by the existing method still needs to be improved, and provides a production method of modified pressure swing adsorption silica gel that can greatly increase the CO2 adsorption capacity

Method used

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  • Production method of modified pressure swing adsorption silica gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In the present invention, sodium silicate solution and dilute sulfuric acid solution are intensively mixed and neutralized to form a hydrogel, and the hydrogel particles are treated with formic acid, acetic acid or hydrofluoric acid → primary acid bubble → primary water washing → secondary acid Soaking→secondary water washing→WA surfactant treatment→glue removal→primary drying→secondary drying to obtain modified pressure swing adsorption silica gel products.

[0017] The modified pressure swing adsorption silica gel of the present invention is prepared on the basis of traditional pressure swing adsorption silica gel 2 19% sodium silicate solution and 22% sulfuric acid solution generate hydrogel particles through intensified mixing and neutralization reaction. The process of formic acid, acetic acid or hydrofluoric acid is to soak the prepared hydrogel particles in a solution that has been added with formic acid, acetic acid or hydrofluoric acid within 1 second for 5 mi...

Embodiment 2-6

[0020] The specific process parameters and inspection indexes of Examples 2-6 are shown in Table 1, and other parameters and steps are the same as in Example 1.

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Abstract

The invention relates to a production method of modified pressure swing adsorption silica gel, and solves the technical problem that the CO2 adsorption amount of a product prepared by the existing method needs to be improved. A sodium silicate solution and a sulfuric acid solution are mixed in an enhancing manner and subjected to neutralization reaction to generate hydrogel; hydrogel particles are subjected to primary pickling, primary washing, secondary pickling, secondary washing, gel taking, primary drying and secondary drying to prepare a silica gel finished product; before the primary pickling step, the hydrogel is further subjected to treatment by formic acid, acetic acid or hydrofluoric acid; between the secondary washing and the gel taking, a surfactant treatment step is added. The production method can be used in the field of preparation of adsorption silica gel.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production method of modified pressure swing adsorption silica gel. Background technique [0002] At present, A-type silica gel is widely used in the dehumidification and drying of precision instruments, industry, medicine, food, clothing, shoes and hats and daily necessities, etc., basically can achieve the effect of moisture absorption, while the dehumidification and drying adsorption of pressure swing adsorption devices , because the adsorption capacity of A-type silica gel to CO2 is far below the design requirements of the pressure swing adsorption device, it cannot meet the requirements. [0003] The authorized publication number is CN101053819 B. The present invention discloses a production method of silica gel for pressure swing adsorption, which comprises the following steps: making a dilute solution of sodium quinolone and concentrated sulfuric acid, and carrying out ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/16C01B33/157
CPCC01B33/157C01B33/16C01P2006/12C01P2006/14C01P2006/16
Inventor 李琳琳孙月竹
Owner RUSHAN DAYANG SILICA GEL FACTORY