CN113620316A - Method for removing bromate from sodium bromide solution - Google Patents
Method for removing bromate from sodium bromide solution Download PDFInfo
- Publication number
- CN113620316A CN113620316A CN202111168181.5A CN202111168181A CN113620316A CN 113620316 A CN113620316 A CN 113620316A CN 202111168181 A CN202111168181 A CN 202111168181A CN 113620316 A CN113620316 A CN 113620316A
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- CN
- China
- Prior art keywords
- bromate
- solution
- sodium bromide
- sodium
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 title claims abstract description 73
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Inorganic materials [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 title claims abstract description 32
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 39
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004202 carbamide Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 11
- XUXNAKZDHHEHPC-UHFFFAOYSA-M sodium bromate Chemical compound [Na+].[O-]Br(=O)=O XUXNAKZDHHEHPC-UHFFFAOYSA-M 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000012452 mother liquor Substances 0.000 claims abstract description 4
- 239000010413 mother solution Substances 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000003513 alkali Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000435 bromine oxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000003710 cerebral cortex Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000002084 dioxo-lambda(5)-bromanyloxy group Chemical group *OBr(=O)=O 0.000 description 1
- 239000002934 diuretic Substances 0.000 description 1
- 230000001882 diuretic effect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- FMSOWMGJJIHFTQ-UHFFFAOYSA-N oxidobromine(.) Chemical compound Br[O] FMSOWMGJJIHFTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000932 sedative agent Substances 0.000 description 1
- 230000001624 sedative effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical compound [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/10—Bromides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for removing bromate from a sodium bromide solution, which comprises the following steps: 1) sampling a sodium bromide solution to be treated to detect the content of sodium bromate, directly feeding the solution into a refining kettle, measuring the pH value of the solution and adjusting the pH value by using hydrobromic acid; 2) calculating the weight of bromate according to the weight percentage concentration of the bromate in the mother solution; 3) calculating the amount of urea to be added according to the weight of bromate; 4) adding the calculated amount of urea into a reaction kettle and then adding enough liquid caustic soda; 5) filtering the solution without the sodium bromate, pumping the solution into an evaporation kettle after filtering, evaporating and concentrating at normal pressure, separating by using a centrifuge, returning the mother liquor for use, sending the sodium bromide crystal to a drying room for drying, and obtaining the dried material which is the sodium bromide. The invention has convenient operation, no increase of equipment investment, no increase of any operation degree, no increase of energy consumption and low cost; will remove BrO3And Br is combined to be removed in one step, so that the efficiency is high.
Description
Technical Field
The invention relates to the field of chemical manufacturing, in particular to a method for removing bromate from a sodium bromide solution.
Background
The sodium bromide is used for preparing photosensitive film, and can be used as diuretic and sedative in medicine, and has effect in enhancing cerebral cortex inhibiting process. It is used as brominating agent in synthetic perfume, medicine and dye industry, and also as chemical reagent.
The present method for producing sodium bromide includes dissolving sodium carbonate and urea in hot water, introducing bromine, controlling temperature and reducing bromine to obtain sodium bromide. Then adding active carbon for decoloring, filtering, evaporating and crystallizing to obtain a finished product. And the neutralization method is to neutralize hydrobromic acid and sodium carbonate solution to ensure that the PH value is between 7.5 and 8, centrifugally filter, concentrate and crystallize to obtain a finished product. Bromate is produced during the preparation of sodium bromide from bromine and sodium hydroxide solutions.
In the general process of storing sodium bromide, the sodium bromide is irradiated by sunlight and is acted by oxygen in the air, so that side reaction is also generated to generate bromate, and the existence of the bromate in the sodium bromide liquid or solid can influence the quality of a product, influence the application range of the product and need to be removed. BrO removal from solution3-Sodium bromide can be generally recrystallized from NaBrO3Separating; h may also be added2SO4The former step is complicated and expensive after being heated and removed, and the latter step can only be partially removed and carries in impurity SO4 2-。
Disclosure of Invention
The invention mainly solves the technical problem of providing a method for removing bromate from a sodium bromide solution, which has the advantages of convenient operation, no increase of equipment investment, no increase of any operation degree, no increase of energy consumption and low cost; will remove BrO3And Br is combined to be removed in one step, so that the efficiency is high.
In order to solve the technical problems, the invention adopts a technical scheme that: a method for removing bromate from a sodium bromide solution is provided, which comprises the following steps:
1) sampling a sodium bromide solution to be treated to detect the content of sodium bromate, directly feeding the solution into a refining kettle, measuring the pH value of the solution and adjusting the pH value by using hydrobromic acid; 2) Calculating the weight of bromate according to the weight percentage concentration of the bromate in the mother solution; 3) Calculating the amount of urea to be added according to the weight of bromate;
4) adding the calculated amount of urea into a reaction kettle and then adding enough liquid caustic soda;
5) filtering the solution without the sodium bromate, pumping the solution into an evaporation kettle after filtering, evaporating and concentrating at normal pressure, separating by using a centrifuge, returning the mother liquor for use, sending the sodium bromide crystal to a drying room for drying, and obtaining the dried material which is the sodium bromide.
In a preferred embodiment of the invention, 0.5 kg of urea per kg of bromate is added in step 3).
In a preferred embodiment of the present invention, the reaction temperature of the urea in the step 4) is 60-90 ℃.
In a preferred embodiment of the present invention, the concentration of the liquid caustic soda in the step 4) is 32% by weight.
In a preferred embodiment of the invention, 1 kg of liquid alkali is added per kg of sodium bromate in the step 4).
In a preferred embodiment of the invention, the urea is used in an amount of 1% of the total amount of the sodium bromide solution.
The invention has the beneficial effects that: the invention has convenient operation, no increase of equipment investment, no increase of any operation degree, no increase of energy consumption and low cost; will remove BrO3And Br is combined to be removed in one step, so that the efficiency is high.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The embodiment of the invention comprises the following steps: a method for removing bromate from a sodium bromide solution comprises the following steps:
1) sampling a sodium bromide solution to be treated to detect the content of sodium bromate, directly feeding the solution into a refining kettle, measuring the pH value of the solution and adjusting the pH value by using hydrobromic acid; 2) Calculating the weight of the bromate according to the weight percentage concentration of the bromate in the mother solution, wherein the weight (kg) = the weight (kg) of the liquid by percentage; 3) Calculating the amount of urea to be added according to the weight of bromate, and adding 0.5 kg of urea into each kg of bromate;
4) adding urea in a calculated amount into a reaction kettle, and adding enough liquid caustic soda with the weight percentage concentration of 32%, wherein the amount of the urea is 1% of the total amount of the sodium bromide solution, the reaction temperature of the urea is 60-90 ℃, and 1 kg of the liquid caustic soda needs to be added into each kg of the sodium bromate;
5) filtering the solution without the sodium bromate, pumping the solution into an evaporation kettle after filtering, evaporating and concentrating at normal pressure, separating by using a centrifuge, returning the mother liquor for use, sending the sodium bromide crystal to a drying room for drying, and obtaining the dried material which is the sodium bromide.
The final product performance parameters are shown in the table below.
The method for removing bromate from the sodium bromide solution is convenient to operate, does not increase equipment investment, does not increase any operation degree, does not increase energy consumption, and is low in cost; will remove BrO3And Br is combined to be removed in one step, so that the efficiency is high.
4. High economic benefit, and combines BrO3 removal and Br removal without increasing energy consumption.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A method for removing bromate from a sodium bromide solution is characterized by comprising the following steps: the method comprises the following steps:
1) sampling a sodium bromide solution to be treated to detect the content of sodium bromate, directly feeding the solution into a refining kettle, measuring the pH value of the solution and adjusting the pH value by using hydrobromic acid; 2) Calculating the weight of bromate according to the weight percentage concentration of the bromate in the mother solution;
3) calculating the amount of urea to be added according to the weight of bromate;
4) adding the calculated amount of urea into a reaction kettle and then adding enough liquid caustic soda;
5) filtering the solution without the sodium bromate, pumping the solution into an evaporation kettle after filtering, evaporating and concentrating at normal pressure, separating by using a centrifuge, returning the mother liquor for use, sending the sodium bromide crystal to a drying room for drying, and obtaining the dried material which is the sodium bromide.
2. The method for removing bromate from sodium bromide solution according to claim 1, wherein: 0.5 kg of urea per kg of bromate was added in step 3).
3. The method for removing bromate from sodium bromide solution according to claim 1, wherein: the reaction temperature of the urea in the step 4) is 60-90 ℃.
4. The method for removing bromate from sodium bromide solution according to claim 1, wherein: the weight percentage concentration of the liquid caustic soda in the step 4) is 32%.
5. The method for removing bromate from sodium bromide solution according to claim 4, wherein: in the step 4), 1 kg of liquid alkali is required to be added to each kg of sodium bromate.
6. The method for removing bromate from sodium bromide solution according to claim 1, wherein: the dosage of the urea is 1 percent of the total amount of the sodium bromide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168181.5A CN113620316A (en) | 2021-10-08 | 2021-10-08 | Method for removing bromate from sodium bromide solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168181.5A CN113620316A (en) | 2021-10-08 | 2021-10-08 | Method for removing bromate from sodium bromide solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113620316A true CN113620316A (en) | 2021-11-09 |
Family
ID=78390677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111168181.5A Pending CN113620316A (en) | 2021-10-08 | 2021-10-08 | Method for removing bromate from sodium bromide solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113620316A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121045A (en) * | 1994-10-21 | 1996-04-24 | 南京化学工业(集团)公司建筑安装工程公司 | Method for removing bromate from lithium bromide solution |
| CN1354125A (en) * | 2001-12-26 | 2002-06-19 | 周群领 | Production method of sodium bromide, sodium bromate, potassium bromide and potassium bromate by using bromide and alkali |
| CN101659426A (en) * | 2009-09-02 | 2010-03-03 | 达州市恒成能源（集团）有限责任公司 | Method for preparing sodium bromide by continuous multi-stage air blow |
-
2021
- 2021-10-08 CN CN202111168181.5A patent/CN113620316A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121045A (en) * | 1994-10-21 | 1996-04-24 | 南京化学工业(集团)公司建筑安装工程公司 | Method for removing bromate from lithium bromide solution |
| CN1354125A (en) * | 2001-12-26 | 2002-06-19 | 周群领 | Production method of sodium bromide, sodium bromate, potassium bromide and potassium bromate by using bromide and alkali |
| CN101659426A (en) * | 2009-09-02 | 2010-03-03 | 达州市恒成能源（集团）有限责任公司 | Method for preparing sodium bromide by continuous multi-stage air blow |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for 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: 20211109 |