CN105399113A - Method for preparing sodium sulfite solution - Google Patents
Method for preparing sodium sulfite solution Download PDFInfo
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- CN105399113A CN105399113A CN201510881881.7A CN201510881881A CN105399113A CN 105399113 A CN105399113 A CN 105399113A CN 201510881881 A CN201510881881 A CN 201510881881A CN 105399113 A CN105399113 A CN 105399113A
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- CN
- China
- Prior art keywords
- soda ash
- absorption
- sodium sulfite
- solution
- hour
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for preparing a sodium sulfite solution. The method comprises the steps of placing pure water and bagged soda ash in an alkali dissolving tank according to the mass ratio of (18-19):1 to obtain a soda ash solution of 4.8-5.2%, transferring the prepared soda ash solution to a purifying column for preliminary absorption with introduced sulfur dioxide for 4-5 h, transferring the soda ash solution to an absorption column for further absorption for 4-5 h till the PH value of the semifinished product sodium sulfite reaches 7.3-8, and transferring the obtained product to a storage tank for use. The sodium sulfite solution produced with the method does not affect the chromaticity of the finished product tetrabromobisphenol A; meanwhile, tetrabromobisphenol A can hardly be dissolved in the soda ash solution, so that materials can not be dissolved in soda ash to be discharged into a water treatment workshop through a wastewater pipeline, and then the yield of tetrabromobisphenol A is increased and wastewater treatment difficulty is reduced.
Description
Technical field
The present invention relates to a kind of production method of sodium sulfite solution, particularly relate to the production method of the sodium sulfite solution in the production of a kind of tetrabromo-bisphenol.
Background technology
In existing tetrabromo-bisphenol production technique; S-WAT uses as a kind of reductive agent and SYNTHETIC OPTICAL WHITNER; its production method utilizes caustic soda sulfur dioxide absorption to generate S-WAT; this production method often there will be in system the situation remaining excessive caustic soda; cause S-WAT finished product pH value higher; directly affect tetrabromo-bisphenol finished product colourity, thus affect quality product.Meanwhile, because tetrabromo-bisphenol is soluble in alkali, tetrabromo-bisphenol material is dissolved in after in excessive caustic soda, can only through in and operation separatory enter wastewater treatment link, material cannot reclaim, and the product yield that both have impact on tetrabromo-bisphenol turn improves the difficulty of wastewater treatment.
Summary of the invention
The object of the present invention is to provide one not affect tetrabromo-bisphenol product colourity, yield, and the production method of the sodium sulfite solution of wastewater treatment difficulty can be reduced.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is: a kind of production method of sodium sulfite solution, point following steps are implemented: put in choline tank by the ratio of pure water and packed soda ash 18-19:1 in mass ratio, be mixed with the soda ash solution of 4.8-5.2%, the soda ash solution prepared is gone in scavenging tower and carry out initial absorption 4-5 hour with the sulfurous gas passed into, proceed to again in absorption tower and continue to absorb 4-5 hour, work in-process S-WAT pH value reaches processing requirement when reaching 7.3-8, goes to storage tank for subsequent use; If work in-process S-WAT pH value is on the low side, the 8-15% of feed liquid in scavenging tower is proceeded in absorption tower and continues absorption 1 hour, for subsequent use to going to storage tank after PH assay reaches processing requirement; If PH is higher for work in-process S-WAT, the soak time 0.5-1 hour in absorption tower can be extended, reach until PH assay that to go to storage tank after processing requirement for subsequent use.
The advantage that the present invention has and positively effect are: when the technical program produces sodium sulfite solution, even if remain excessive soda ash in system, because soda ash is weak base, S-WAT finished product pH value can not be caused higher, therefore can not impact tetrabromo-bisphenol finished product colourity; Tetrabromo-bisphenol is difficult to be dissolved in soda ash solution simultaneously, and material can not be dissolved in soda ash and drain between water treatment vehicle by waste line, and the product yield that both improve tetrabromo-bisphenol again reduces the difficulty of wastewater treatment.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment:
For summary of the invention of the present invention can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described as follows:
A kind of production method of sodium sulfite solution, point following steps are implemented: put in choline tank by the ratio of pure water and packed soda ash 18.75:1 in mass ratio, be mixed with the soda ash solution of 5.06%, the soda ash solution prepared is gone in scavenging tower and carry out initial absorption 4 hours with the sulfurous gas passed into, proceed to again in absorption tower and continue absorption 5 hours, work in-process S-WAT pH value reaches processing requirement when reaching 7.3-8, goes to storage tank for subsequent use; If work in-process S-WAT pH value is on the low side, proceeds to 10% of feed liquid in scavenging tower in absorption tower and continue absorption 1 hour, for subsequent use to going to storage tank after PH assay reaches processing requirement; If PH is higher for work in-process S-WAT, the soak time 0.5-1 hour in absorption tower can be extended, reach until PH assay that to go to storage tank after processing requirement for subsequent use.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (1)
1. the production method of a sodium sulfite solution, it is characterized in that, point following steps are implemented: put in choline tank by the ratio of pure water and packed soda ash 18-19:1 in mass ratio, be mixed with the soda ash solution of 4.8-5.2%, the soda ash solution prepared is gone in scavenging tower and carry out initial absorption 4-5 hour with the sulfurous gas passed into, proceed to again in absorption tower and continue to absorb 4-5 hour, reach processing requirement when work in-process S-WAT pH value reaches 7.3-8, go to storage tank for subsequent use; If work in-process S-WAT pH value is on the low side, the 8-15% of feed liquid in scavenging tower is proceeded in absorption tower and continues absorption 1 hour, for subsequent use to going to storage tank after PH assay reaches processing requirement; If PH is higher for work in-process S-WAT, the soak time 0.5-1 hour in absorption tower can be extended, reach until PH assay that to go to storage tank after processing requirement for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881881.7A CN105399113A (en) | 2015-12-03 | 2015-12-03 | Method for preparing sodium sulfite solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510881881.7A CN105399113A (en) | 2015-12-03 | 2015-12-03 | Method for preparing sodium sulfite solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105399113A true CN105399113A (en) | 2016-03-16 |
Family
ID=55464926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510881881.7A Pending CN105399113A (en) | 2015-12-03 | 2015-12-03 | Method for preparing sodium sulfite solution |
Country Status (1)
| Country | Link |
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| CN (1) | CN105399113A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712479A (en) * | 2009-07-09 | 2010-05-26 | 福建省邵武市榕丰化工有限公司 | Method for preparing sodium sulfite by utilizing total alkali in hydrazine hydrate |
| CN102515208A (en) * | 2006-10-30 | 2012-06-27 | 廖树汉 | Method and apparatus for producing sodium sulfite through 100% recovery of boiler exhaust gas by sodium carbonate |
| CN102659142A (en) * | 2012-04-17 | 2012-09-12 | 伍立君 | Preparation device and preparation method of sodium pyrosulfite and anhydrous sodium sulphite |
| CN202529863U (en) * | 2012-04-27 | 2012-11-14 | 山东聊城鲁西化工第四化肥有限公司 | Device for producing anhydrous sodium sulfite from sulfuric acid tail gas washing liquid |
-
2015
- 2015-12-03 CN CN201510881881.7A patent/CN105399113A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515208A (en) * | 2006-10-30 | 2012-06-27 | 廖树汉 | Method and apparatus for producing sodium sulfite through 100% recovery of boiler exhaust gas by sodium carbonate |
| CN101712479A (en) * | 2009-07-09 | 2010-05-26 | 福建省邵武市榕丰化工有限公司 | Method for preparing sodium sulfite by utilizing total alkali in hydrazine hydrate |
| CN102659142A (en) * | 2012-04-17 | 2012-09-12 | 伍立君 | Preparation device and preparation method of sodium pyrosulfite and anhydrous sodium sulphite |
| CN202529863U (en) * | 2012-04-27 | 2012-11-14 | 山东聊城鲁西化工第四化肥有限公司 | Device for producing anhydrous sodium sulfite from sulfuric acid tail gas washing liquid |
Non-Patent Citations (1)
| Title |
|---|
| 宋小平等: "《石油工业用添加剂生产与应用技术》", 31 March 2014, 中国石化出版社 * |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160316 |