CN105502416A - Novel manufacturing process of mesoporous silica gel - Google Patents
Novel manufacturing process of mesoporous silica gel Download PDFInfo
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- CN105502416A CN105502416A CN201410558511.5A CN201410558511A CN105502416A CN 105502416 A CN105502416 A CN 105502416A CN 201410558511 A CN201410558511 A CN 201410558511A CN 105502416 A CN105502416 A CN 105502416A
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- silica gel
- reaction tower
- water washing
- temperature
- tank
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Abstract
The invention relates to a novel manufacturing technology of a mesoporous 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 30 to 35 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 30 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 45 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 mesoporous silica gel.
Description
Technical field
The invention belongs to silica gel manufacturing technology field, be specifically related to a kind of novel manufacturing process of mesoporous silica gel.
Background technology
The Application Areas of silica gel is day by day extensive; see with regard to current should being used for; mesoporous silica gel is mainly at its silica gel that is dry and provide protection of the field of food such as tealeaves; mesoporous 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 manufacturing process of mesoporous silica gel, described mesoporous silica gel carries out colloidal sol by water glass and sulfuric acid and reacts 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 manufacturing process of mesoporous silica gel, 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 30-35 DEG C, the sulphuric acid soln that content is 25-35% is configured in complex acid tank, temperature is 30-35 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 40-45 DEG C, after washing terminal, carry out ammonia bubble 6-8 hour, then in baking oven, press filtration is dried, and obtains mesoporous silica gel.
Reaction tower interior reaction temperature is 80-90 DEG C.
In water washing tank, washing time is 35-40 hour.
The temperature of press filtration baking stage baking oven is 100-150 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 10 liter of 25% sulphuric acid soln is joined in experiment reaction tower, then by SiO that 6 liters prepare
2content be 30% sodium silicate solution be injected in experiment reaction tower, in tower, temperature is 81 DEG C, experimental water cleaning of evaporator is entered into after aging 16 hours in the acidic solution of pH value at 1-3, wash in the water of 41 DEG C, wash and carry out ammonia after 37 hours and steep 7 hours, then the temperature of press filtration baking stage baking oven is 100 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 manufacturing process for mesoporous silica gel, 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 30-35 DEG C, the sulphuric acid soln that content is 25-35% is configured in complex acid tank, temperature is 30-35 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 40-45 DEG C, after washing terminal, carry out ammonia bubble 6-8 hour, then in baking oven, press filtration is dried, and obtains mesoporous silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410558511.5A CN105502416A (en) | 2014-10-18 | 2014-10-18 | Novel manufacturing process of mesoporous silica gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410558511.5A CN105502416A (en) | 2014-10-18 | 2014-10-18 | Novel manufacturing process of mesoporous silica gel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502416A true CN105502416A (en) | 2016-04-20 |
Family
ID=55710802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410558511.5A Pending CN105502416A (en) | 2014-10-18 | 2014-10-18 | Novel manufacturing process of mesoporous silica gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105502416A (en) |
-
2014
- 2014-10-18 CN CN201410558511.5A patent/CN105502416A/en active Pending
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |
|
| WD01 | Invention patent application deemed withdrawn after publication |