CN1063153C - Method of preparing hydrobromic acid by utilizing tail gas containng bromine - Google Patents
Method of preparing hydrobromic acid by utilizing tail gas containng bromine Download PDFInfo
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- CN1063153C CN1063153C CN97102400A CN97102400A CN1063153C CN 1063153 C CN1063153 C CN 1063153C CN 97102400 A CN97102400 A CN 97102400A CN 97102400 A CN97102400 A CN 97102400A CN 1063153 C CN1063153 C CN 1063153C
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- bromine
- hydrobromic acid
- absorption liquid
- tail gas
- gas
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Abstract
The present invention relates to a method for preparing hydrobromic acid from tail gas containing bromine. The present invention uses bromized hydrogen gas expelled in the production of 1-aminohydroxyanthraquinone-2-bromine-4-hydroxyanthraquinone to dissolve in water for preparing hydrobromic acid as absorption liquid used for absorbing tail gas containing bromine gas expelled from bromizing end points of 1-amino-2-bromine-4-hydroxyanthraquinone; then, sulfur dioxide as reducing agents is added in the absorption liquid for causing bromine gas to be reduced to hydrogen bromide for obtaining hydrobromic acid liquid with increased concentration. The present invention reduces the discharge of hydrogen bromide and bromine gas, protects environment and simultaneously saves resources, and the method of the present invention can cause the recovery rate of bromine gas to be more than 95%.
Description
The invention relates to a purification treatment method of tail gas containing bromine in chemical production.
At present, hydrogen bromide gas is discharged in the production process of 1-amino-2-bromo-4-hydroxyanthraquinone, a large amount of tail gas containing bromine gas is discharged at the end of bromination, and the hydrogen bromide is easy to dissolve in water and is usually directly discharged into a water pool, while the bromine gas is only slightly soluble in water and is generally directly discharged into the air or discharged after being neutralized by alkali liquor. The treatment method causes environmental pollution, and simultaneously, the bromine gas is not recycled, so that the resource waste is caused, and the production cost is increased by neutralizing with alkali liquor.
The invention aims to provide a purification treatment method of tail gas containing bromine, which is used for reducing environmental pollution and saving resources.
The invention is based on bromine hydrideThe purifying treatment of the tail gas containing bromine is carried out by the principle that the acid can rapidly absorb bromine gas. The specific method comprises the following steps: using hydrobromic acid solution as the absorption liquid of bromine gas, discharging the bromine-containing tail gas generated in production into the hydrobromic acid solution, dissolving bromine in the hydrobromic acid to generate HBr3The reaction is as follows:
adding a reducing agent into the hydrobromic acid solution dissolved with bromine gas to ensure that HBr3Reducing to HBr to obtain the hydrogen bromide acid solution with increased concentration. The reducing agent can be sulfur dioxide, and the reaction is as follows:
sulfur or urea may also be used as a reducing agent.
When the hydrobromic acid is prepared by utilizing tail gas containing bromine in the production of 1-amino-2-bromine-4-hydroxyanthraquinone, hydrogen bromide gas discharged in the production process of 1-amino-2-bromine-4-hydroxyanthraquinone is dissolved in water to prepare hydrobromic acid solution as absorption liquid.
The invention uses hydrobromic acid to absorb bromine gas, and then reduces the bromine gas into hydrogen bromide to prepare the hydrobromic acid, so that the discharge amount of the bromine gas is reduced, the bromine gas is fully contacted with the absorption liquid, the recovery rate of the bromine gas can reach more than 95 percent, the environment is protected, and the resources are saved. The hydrogen bromide gas generated in the production process of the 1-amino-2-bromo-4-hydroxyanthraquinone is used for preparing the absorption liquid, so that the hydrogen bromide is recovered, the cost is reduced, and the environment is protected.
FIG. 1 is a process flow diagram of the method of the present invention.
Example (b): as shown in figure 1, a circulating pump 5 sends one path of liquid in a circulating tank 4 to a Venturi ejector 3 through a valve 6, and sends the other path of liquid to a filler absorption tower 11 through a valve 7, a feed inlet 2 is arranged on the circulating tank 4, a liquid inlet 9 and an exhaust port 10 are arranged at the top of the filler absorption tower 11, and a liquid outlet 13 and an air inlet 12 are arranged at the bottom of the filler absorption tower. The liquid in the circulating tank before treatment is water, and after the treatment is started, the 1-amino-2-bromine-4-hydroxyanthraquinone is producedThe hydrogen bromide gas discharged in the process is sucked into a Venturi ejector 3 through a gas inlet 1 and is absorbed in parallel flow with water pumped by a circulating pump to prepare a dilute hydrobromic acid solution, the dilute hydrobromic acid solution entersa circulating tank 4, meanwhile, the hydrobromic acid solution in the circulating tank is fed into a filler absorption tower 11 through a valve 7 and a liquid inlet 9 by a circulating pump 5, after the bromination end point of 1-amino-2-bromine-4-hydroxyanthraquinone is reached, the bromine-containing tail gas discharged from the process is fed into the bottom of the filler absorption tower 11 through a gas inlet 12, the bromine gas and the hydrobromic acid are fully contacted and reacted in the tower to generate HBr3, so that the aim of quickly absorbing the bromine gas is fulfilled, and the purified tail gas is discharged through a gas outlet 10 at the top of the tower. The absorption liquid absorbing the over bromine gas is cooled to 0-40 ℃ from a liquid outlet 13 at the bottom of the tower through a condenser 14, the temperature is better according to the room temperature, and then the absorption liquid is sent back to the circulating tank 4, a reducing agent is added into the circulating tank, the reducing agent can be sulfur dioxide, sulfur or urea, for example, sulfur dioxide is used as the reducing agent, the reducing agent can be added from an air inlet 1 of a Venturi ejector, sulfur or urea is used as the reducing agent, and the reducing agent is added from a feeding port 2. Reducing agent and HBr3Reacting in a circulating tank, reducing the hydrobromic acid into hydrogen bromide to increase the concentration of the hydrobromic acid in the circulating tank, continuously circulating to gradually increase the concentration of the hydrobromic acid, opening a valve 8 to discharge the prepared hydrobromic acid for canning when the Bomei concentration of an absorption liquid reaches 48-50 Be', supplementing water into the circulating tank after canning is finished, and continuing the next working cycle.
The method is also suitable for treating and absorbing the bromine-containing tail gas in the production process of the bromamine acid and recovering and treatingbromine gas in other bromination processes. The initial absorption liquid in the circulating tank is diluted hydrobromic acid solution with concentration of 10-20%.
Claims (5)
1. A method for preparing hydrobromic acid by utilizing tail gas containing bromine is characterized in that hydrobromic acid solution is taken as absorption liquid, and the method comprises the following steps:
(1) the tail gas containing bromine is discharged into absorption liquid, bromine is dissolved in hydrobromic acid absorption liquid to generate HBr3；
(2) Adding a reducing agent into the absorption liquid dissolved with bromine, and adding HBr3Reducing to HBr to obtain hydrobromic acid solution with increased concentration。
2. The method according to claim 1, wherein the bromine-containing tail gas is tail gas discharged from a bromination end point of 1-amino-2-bromo-4-hydroxyanthraquinone; the hydrobromic acid absorption liquid is prepared by dissolving hydrogen bromide gas discharged in the production process of 1-amino-2-bromo-4-hydroxyanthraquinone in water.
3. The method according to claim 1 or 2, characterized in that a hydrobromic acid solution with a concentration of 10-2% is used as the initial absorption solution; continuously repeating the steps (1) and (2) by taking the hydrobromic acid solution obtained in the step (2) as an absorption solution; when the glass concentration of the absorption liquid reaches 48-50 Be', the absorption liquid is replaced or water is added or the initial absorption liquid is added for dilution.
4. A method according to claim3, characterized in that the reducing agent is sulphur dioxide or sulphur or urea.
5. The method according to claim 4, wherein the temperature of the absorbing solution in the steps (1) and (2) is controlled to be 0 to 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102400A CN1063153C (en) | 1997-01-31 | 1997-01-31 | Method of preparing hydrobromic acid by utilizing tail gas containng bromine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102400A CN1063153C (en) | 1997-01-31 | 1997-01-31 | Method of preparing hydrobromic acid by utilizing tail gas containng bromine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189448A CN1189448A (en) | 1998-08-05 |
| CN1063153C true CN1063153C (en) | 2001-03-14 |
Family
ID=5166280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102400A Expired - Fee Related CN1063153C (en) | 1997-01-31 | 1997-01-31 | Method of preparing hydrobromic acid by utilizing tail gas containng bromine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063153C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423605A (en) * | 2011-08-26 | 2012-04-25 | 莱州诚源盐化有限公司 | Recovery device and recovery method of tail gas of bromine packing |
| CN111019020B (en) * | 2019-06-19 | 2023-02-07 | 北京诺维新材科技有限公司 | Preparation method of halogenated polymer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53149895A (en) * | 1977-06-02 | 1978-12-27 | Agency Of Ind Science & Technol | Continuous production of hydrogen bromide gas and sulfuric acid from bromine and sulfur dioxide |
| CN1126174A (en) * | 1995-01-03 | 1996-07-10 | 天津海晶集团盐化总公司 | Method for prepn. of hyrobromic acid |
-
1997
- 1997-01-31 CN CN97102400A patent/CN1063153C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53149895A (en) * | 1977-06-02 | 1978-12-27 | Agency Of Ind Science & Technol | Continuous production of hydrogen bromide gas and sulfuric acid from bromine and sulfur dioxide |
| CN1126174A (en) * | 1995-01-03 | 1996-07-10 | 天津海晶集团盐化总公司 | Method for prepn. of hyrobromic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1189448A (en) | 1998-08-05 |
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