CN105585018A - Technological process of super-macroporous silica gel - Google Patents
Technological process of super-macroporous silica gel Download PDFInfo
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- CN105585018A CN105585018A CN201410558390.4A CN201410558390A CN105585018A CN 105585018 A CN105585018 A CN 105585018A CN 201410558390 A CN201410558390 A CN 201410558390A CN 105585018 A CN105585018 A CN 105585018A
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- silica gel
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Abstract
The invention relates to a technological process of super-macroporous silica gel. According to the technological process, mixing, reaction and washing are carried out through an alkali preparation bath, an acid preparation tank, a reaction tower and a washing tank. The specific technological process comprises the following steps: a sodium silicate solution containing 30-40% of SiO2 is prepared through the alkali preparation bath on silica gel production equipment at the temperature of 30-35 DEG C; 15-25% of a sulfuric acid solution is prepared in the acid preparation tank at the temperature of 20-35 DEG C; the sulfuric acid solution is added into the reaction tower, the prepared sodium silicate solution is then added into the reaction tower, and silica gel particles are formed after the reaction; the silica gel particles undergo aging in an acid solution with pH value being 1-3 for 15-18 h; the silica gel particles enter the washing tank to be washed in water of 75-85 DEG C; the washed silica gel particles are soaked in ammonia for 6-8 h after washing; and finally, the silica gel particles undergo filter-pressing and drying so as to obtain super-macroporous silica gel.
Description
Technical field
The invention belongs to silica gel manufacturing technology field, be specifically related to the technological process of a kind of super big hole silica gel.
Background technology
The application of silica gel is day by day extensive; see with regard to current should being used for; the silica gel majority that plays dry and protective effect at industrial circles such as electronic product dehumidifyings is super big hole silica gel; super big hole silica gel has all obtained good application in applications such as filter aid, delustering agent, tactile flat agent in addition, and the effect that current existing technology obtains in size distribution is also not obvious.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, has proposed the technological process of a kind of super big hole silica gel, and described super big hole silica gel is to carry out colloidal sol by sodium metasilicate and sulfuric acid to react and make.
Technical scheme of the present invention is: the technological process of a kind of super big hole silica gel, described flow process is by joining alkali pond, complex acid tank, reaction tower and water washing tank mix, reaction and washing, concrete technology flow process is: in silica gel production equipment, prepare by joining alkali pond the sodium silicate solution that SiO2 content is 30-40%, temperature is 30-35 DEG C, in complex acid tank, configure the sulfuric acid solution that content is 15-25%, temperature is 20-35 DEG C, sulfuric acid solution is joined in reaction tower, again the sodium silicate solution preparing is joined in reaction tower, after reaction, form silica gel particle, silica gel particle is at pH value in the acid solution at 1-3 after aging 15-18 hour, enter into water washing tank, in the water of 75-85 DEG C, wash, washing is carried out ammonia bubble 6-8 hour after terminal, then in baking oven, press filtration is dried, obtain super big hole silica gel.
Reaction tower interior reaction temperature is 100-110 DEG C.
In water washing tank, washing time is 70-75 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 raw material are carried out to special processing.
2) production process is all carried out under condition of normal pressure, is conducive to large-scale production.
3) in water-washing process, washing temperature is carried out at normal temperatures, the silica gel even particle size distribution making.
4) can according to client need in water-washing process, carry out reaming processing, meet different clients' index request.
5) shortened the production cycle, utilization ratio of device obviously improves.
Further illustrate the present invention below in conjunction with detailed description of the invention.
Detailed description of the invention
Below embodiment of the present invention:
Embodiment 1:
First 10 liter of 15% sulfuric acid solution joined in experiment reaction tower, the sodium silicate solution that is 30% by 6 liters of SiO2 content that prepare is again injected in experiment reaction tower, in tower, temperature is 105 DEG C, in acid solution at pH value at 1-3, after aging 16 hours, enter into experimental water cleaning of evaporator, in the water of 78 DEG C, wash, washing was carried out ammonia bubble 7 hours after 70 hours, and then the temperature of press filtration baking stage baking oven is 100 DEG C, and drying time is that 50 hours experimental datas are as table 1.
Table 1 experimental data table
Claims (2)
1. super big hole silica gel technological process, it is characterized in that: described flow process is by joining alkali pond, complex acid tank, reaction tower and water washing tank mix, reaction and washing, concrete technology flow process is: in silica gel production equipment, prepare by joining alkali pond the sodium silicate solution that SiO2 content is 30-40%, temperature is 30-35 DEG C, in complex acid tank, configure the sulfuric acid solution that content is 15-25%, temperature is 20-35 DEG C, sulfuric acid solution is joined in reaction tower, again the sodium silicate solution preparing is joined in reaction tower, after reaction, form silica gel particle, silica gel particle is at pH value in the acid solution at 1-3 after aging 15-18 hour, enter into water washing tank, in the water of 75-85 DEG C, wash, in water washing tank, washing time is 70-75 hour, washing is carried out ammonia bubble 6-8 hour after terminal, then in baking oven, press filtration is dried, obtain super big hole silica gel.
2. super big hole silica gel according to claim 1 technological process, is characterized in that: reaction tower interior reaction temperature is 100-110 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410558390.4A CN105585018A (en) | 2014-10-21 | 2014-10-21 | Technological process of super-macroporous silica gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410558390.4A CN105585018A (en) | 2014-10-21 | 2014-10-21 | Technological process of super-macroporous silica gel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105585018A true CN105585018A (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410558390.4A Pending CN105585018A (en) | 2014-10-21 | 2014-10-21 | Technological process of super-macroporous silica gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105585018A (en) |
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2014
- 2014-10-21 CN CN201410558390.4A patent/CN105585018A/en active Pending
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160518 |
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| WD01 | Invention patent application deemed withdrawn after publication |