CN105502418A - Novel production technology of microporous adsorptive silica gel - Google Patents
Novel production technology of microporous adsorptive silica gel Download PDFInfo
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- CN105502418A CN105502418A CN201410559029.3A CN201410559029A CN105502418A CN 105502418 A CN105502418 A CN 105502418A CN 201410559029 A CN201410559029 A CN 201410559029A CN 105502418 A CN105502418 A CN 105502418A
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- silica gel
- reaction tower
- water washing
- temperature
- tank
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Abstract
The invention relates to a novel production technology of a microporous adsorptive silica gel. The technology comprises steps of mixing, reacting, and water washing, and the steps are performed in an alkali preparation pool, an acid preparation tank, a reaction tower, and a water washing tank. The technology specifically comprises the following steps: preparing a sodium silicate solution with a SiO2 content of 20 to 30% in silica gel production equipment at a temperature of 35 to 40 DEG C through the alkali preparation pool; preparing a sulfuric acid solution with a content of 25 to 35% in the acid preparation tank at a temperature of 20 to 35 DEG C; adding the sulfuric acid solution into the reaction tower, then adding the prepared sodium silicate solution into the reaction tower, carrying out reactions to obtain silica gel particles, aging the silica gel particles in an acidic solution with a pH value of 1 to 3 for 15 to 18 hours, then transferring the silica gel particles to the water washing tank, washing the silica gel particles by water with a temperature of 45 to 55 DEG C, after water washing, soaking silica gel particles in ammonia liquor for 6 to 8 hours, and press-filtering and drying silica gel particles in a baking oven so as to obtain the microporous adsorptive silica gel.
Description
Technical field
The invention belongs to silica gel manufacturing technology field, be specifically related to a kind of novel aperture adsorption silica gel technique.
Background technology
The Application Areas of silica gel is day by day extensive; see with regard to current should being used for; aperture adsorption silica gel is mainly at its silica gel that is dry and provide protection of the garment industries such as clothes dehumidifying; aperture adsorption silica gel is obtained for good application in the Application Areas such as flocculating aids, matting agent, tactile flat agent, support of the catalyst, selective adsorption in addition, and the effect that current existing Technology obtains in size-grade distribution is also not obvious.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, propose a kind of novel aperture adsorption silica gel technique, described aperture adsorption silica gel is carried out colloidal sol by water glass and sulfuric acid and is reacted obtained, and its reaction signal formula is:
Na
2SiO
3+H
2SO
4 Na
2SO
4+H
4SiO
4
H
4SiO
4 SiO
2·
nH 2 O
Technical scheme of the present invention is: a kind of novel aperture adsorption silica gel technique, and undertaken mixing, react and washing by joining alkali pond, complex acid tank, reaction tower and water washing tank, concrete technology flow process is: by joining alkali pond preparation SiO in silica gel production equipment
2content is the sodium silicate solution of 20-30%, temperature is 35-40 DEG C, the sulphuric acid soln that content is 25-35% is configured in complex acid tank, temperature is 20-35 DEG C, sulphuric acid soln is joined in reaction tower, again the sodium silicate solution prepared is joined in reaction tower, silica gel particle is formed after reaction, silica gel particle is in the acidic solution of pH value at 1-3 after aging 15-18 hour, enter into water washing tank, wash in the water of 45-55 DEG C, after washing terminal, carry out ammonia bubble 6-8 hour, then in baking oven, press filtration is dried, and obtains aperture adsorption silica gel.
Reaction tower interior reaction temperature is 90-100 DEG C.
In water washing tank, washing time is 25-30 hour.
The temperature of press filtration baking stage baking oven is 120-150 DEG C, and drying time is 48-52 hour.
The present invention has following beneficial effect:
1) without the need to carrying out special process to starting material.
2) production process is carried out all in atmospheric conditions, is conducive to large-scale production.
3) in water washing process, washing temperature is carried out at normal temperatures, obtained silica gel even particle size distribution.
4) expanding treatment can be carried out according to the needs of client in water washing process, meet the index request of different client.
5) shorten the production cycle, utilization ratio of device significantly improves.
The present invention is further illustrated below in conjunction with embodiment.
Embodiment
Below embodiment of the present invention:
Embodiment 1:
First 25% sulphuric acid soln is joined in reaction tower, then the SiO that will prepare
2content be 30% sodium silicate solution be injected in reaction tower, in tower, temperature is 95 DEG C, water washing tank is entered into after aging 16 hours in the acidic solution of pH value at 1-3, wash in the water of 46 DEG C, wash and carry out ammonia after 26 hours and steep 7 hours, then the temperature of press filtration baking stage baking oven is 120 DEG C, and drying time is that 48 hours experimental datas are as table 1.
Table 1 experimental data table
Claims (1)
1. a novel aperture adsorption silica gel technique, is characterized in that: undertaken mixing, react and washing by joining alkali pond, complex acid tank, reaction tower and water washing tank, concrete technology flow process is: by joining alkali pond preparation SiO in silica gel production equipment
2content is the sodium silicate solution of 20-30%, temperature is 35-40 DEG C, the sulphuric acid soln that content is 25-35% is configured in complex acid tank, temperature is 20-35 DEG C, sulphuric acid soln is joined in reaction tower, again the sodium silicate solution prepared is joined in reaction tower, silica gel particle is formed after reaction, silica gel particle is in the acidic solution of pH value at 1-3 after aging 15-18 hour, enter into water washing tank, wash in the water of 45-55 DEG C, after washing terminal, carry out ammonia bubble 6-8 hour, then in baking oven, press filtration is dried, and obtains aperture adsorption silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559029.3A CN105502418A (en) | 2014-10-18 | 2014-10-18 | Novel production technology of microporous adsorptive silica gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559029.3A CN105502418A (en) | 2014-10-18 | 2014-10-18 | Novel production technology of microporous adsorptive silica gel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502418A true CN105502418A (en) | 2016-04-20 |
Family
ID=55710804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410559029.3A Pending CN105502418A (en) | 2014-10-18 | 2014-10-18 | Novel production technology of microporous adsorptive silica gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105502418A (en) |
-
2014
- 2014-10-18 CN CN201410559029.3A patent/CN105502418A/en active Pending
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Application publication date: 20160420 |