CN104724712A - Method for preparing silica white from sulfuric acid production tail gas - Google Patents
Method for preparing silica white from sulfuric acid production tail gas Download PDFInfo
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- CN104724712A CN104724712A CN201510108215.XA CN201510108215A CN104724712A CN 104724712 A CN104724712 A CN 104724712A CN 201510108215 A CN201510108215 A CN 201510108215A CN 104724712 A CN104724712 A CN 104724712A
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- tail gas
- acid production
- production tail
- sulfuric acid
- sulfuric
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Abstract
The invention discloses a method for preparing silica white from sulfuric acid production tail gas, which comprises the following steps: (1) after absorbing sulfuric acid production tail gas with water glass production wastewater, concentrating the wastewater to 1-1.6 wt%; and (2) adding 0.8-0.9 m<3> of 24-27 wt% sodium silicate solution and 0.05-0.07 m<3> of sulfuric acid into every cubic meter of wastewater, reacting for 1-1.5 hours, acidifying until the pH value is 4-5, aging for 60-80 minutes, filtering, and washing to obtain the silica white. The method can purify the sulfuric acid production tail gas; and the specific area of the produced silica white is 145-195 cm<2>/g, thereby satisfying the operating requirements for a reinforcing agent.
Description
Technical field
The invention belongs to industrial tail gas process field, be specifically related to utilize sulfuric-acid production tail gas to prepare the method for white carbon black.
Background technology
SO in sulfuric-acid production tail gas
2content higher (being usually greater than 1000PPM), can not, directly to airborne release, need to reduce SO in tail gas by a desulfurizer
2concentration also could be discharged after reaching the emission request of national regulation.
Summary of the invention
The object of this invention is to provide a kind of method utilizing sulfuric-acid production tail gas to prepare white carbon black.
It is as follows that the present invention realizes the technical scheme that above-mentioned purpose adopts:
Utilize sulfuric-acid production tail gas to prepare the method for white carbon black, comprise the steps:
(1) after sulfuric-acid production tail gas absorbs with water glass factory effluent, then by waste water concentrate to 1 ~ 1.6wt%;
(2), after concentrate, in every cubic metre of waste water, 0.8-0.9m is added
3concentration be sodium silicate solution and the 0.05-0.07m of 24-27wt%
3sulfuric acid, react 1 ~ 1.5 hour, being acidified to pH is afterwards 4 ~ 5, aging 60 ~ 80 minutes, after filtration, washing obtain white carbon black.
Further, the specific surface area of described white carbon black is 145 ~ 195cm
2/ g.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details.
In water glass is produced, the waste water produced after filtered water glass mother liquor contains the alkaline matter such as soda ash, water glass, if this water glass factory effluent directly discharges, one causes environmental pollution, two cause wastage of material, be unfavorable for reducing production cost, as the alkaline absorption solution absorbing sulfuric-acid production tail gas, there is positive meaning using this water glass factory effluent.
At thionizer, using water glass factory effluent as alkaline absorption solution, absorb sulfuric-acid production tail gas, obtain the silica gel of precipitation of silica and colloidal, this product is the initiating particle of white carbon black, particle diameter is too little, specific surface area is too large, but the effective Kong Rong as strengthening agent is less, and (white carbon black has porousness, differ in large small-bore, some apertures are less, rubber molecule can not enter, the micropore only having aperture to be greater than rubber molecule is only effective Kong Rong), can not filter smoothly, washing etc., also affect the combination of itself and rubber simultaneously, can't use as strengthening agent in rubber industry.Sulfuric-acid production tail gas can reach the emission standard of national regulation through absorbing.
Therefore, after water glass factory effluent absorbs sulfuric-acid production tail gas, utilize gravity settling, waste strength is increased to 1.0 ~ 1.6wt%(in insolubles, insolubles is mainly SiO
2precipitation and silica gel), then in every cubic metre of waste water, add 0.8-0.9m
3concentration be sodium silicate solution and the 0.05-0.07m of 24-27wt%
3sulfuric acid, react 1 ~ 1.5 hour, being acidified to pH is afterwards 4 ~ 5, aging 60 ~ 80 minutes, and after filtration, washing, dry, can be met the white carbon black of strengthening agent service requirements, specific surface area is 145 ~ 195cm
2/ g.
In annual 200000 tons of acid production with sulphur, the annual water glass factory effluent 11304 tons needing purification, preparing output of white carbon black by this method is every year 1200 tons.
Claims (2)
1. utilize sulfuric-acid production tail gas to prepare the method for white carbon black, comprise the steps:
(1) after sulfuric-acid production tail gas absorbs with water glass factory effluent, then by waste water concentrate to 1 ~ 1.6wt%;
(2), after concentrate, in every cubic metre of waste water, 0.8-0.9m is added
3concentration be sodium silicate solution and the 0.05-0.07m of 24-27wt%
3sulfuric acid, react 1 ~ 1.5 hour, being acidified to pH is afterwards 4 ~ 5, aging 60 ~ 80 minutes, after filtration, washing obtain white carbon black.
2. utilize sulfuric-acid production tail gas to prepare the method for white carbon black according to claim 1, it is characterized in that, the specific surface area of described white carbon black is 145 ~ 195cm
2/ g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510108215.XA CN104724712A (en) | 2015-03-12 | 2015-03-12 | Method for preparing silica white from sulfuric acid production tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510108215.XA CN104724712A (en) | 2015-03-12 | 2015-03-12 | Method for preparing silica white from sulfuric acid production tail gas |
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| Publication Number | Publication Date |
|---|---|
| CN104724712A true CN104724712A (en) | 2015-06-24 |
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ID=53449217
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510108215.XA Pending CN104724712A (en) | 2015-03-12 | 2015-03-12 | Method for preparing silica white from sulfuric acid production tail gas |
Country Status (1)
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| CN (1) | CN104724712A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043198A (en) * | 2017-12-06 | 2018-05-18 | 安徽凤阳赛吉元无机材料有限公司 | A kind of method for preparing doctor solution using waterglass water quenching water |
| CN109806724A (en) * | 2019-04-01 | 2019-05-28 | 青岛创客机械设备制造有限公司 | A kind of desulphurization denitration absorbent and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699163A (en) * | 2005-06-08 | 2005-11-23 | 卢元健 | Process for producing white carbon black and sodium sulphite by sodium sulfate method |
-
2015
- 2015-03-12 CN CN201510108215.XA patent/CN104724712A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699163A (en) * | 2005-06-08 | 2005-11-23 | 卢元健 | Process for producing white carbon black and sodium sulphite by sodium sulfate method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043198A (en) * | 2017-12-06 | 2018-05-18 | 安徽凤阳赛吉元无机材料有限公司 | A kind of method for preparing doctor solution using waterglass water quenching water |
| CN109806724A (en) * | 2019-04-01 | 2019-05-28 | 青岛创客机械设备制造有限公司 | A kind of desulphurization denitration absorbent and preparation method thereof |
| CN109806724B (en) * | 2019-04-01 | 2022-08-30 | 青岛美高集团有限公司 | Desulfurization and denitrification absorbent and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |