CN113979462A - Simple synthesis method of liquid calcium bromide - Google Patents
Simple synthesis method of liquid calcium bromide Download PDFInfo
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- CN113979462A CN113979462A CN202111132231.4A CN202111132231A CN113979462A CN 113979462 A CN113979462 A CN 113979462A CN 202111132231 A CN202111132231 A CN 202111132231A CN 113979462 A CN113979462 A CN 113979462A
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- calcium bromide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/34—Bromides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a simple synthesis method of liquid calcium bromide, which comprises the following steps: 1) acidifying limestone; 2) settling and filtering; 3) impurity treatment, sedimentation and filtration; 4) and (4) batching. The invention uses the byproduct hydrobromic acid generated by other bromination products, has low price, is more economical than bromine, improves the use of bromine atoms, and changes waste into valuable in the bromine tension period; the limestone raw material is cheap and easy to obtain, the source is wide, the preparation process is simple, the yield is high, the production cost is reduced, the prepared calcium bromide product has high clarity, good solution uniformity and standard quality, and has good economic benefit.
Description
Technical Field
The invention relates to the field of chemical manufacturing, in particular to a simple and convenient synthesis method of liquid calcium bromide.
Background
Calcium bromide is used as sedative in medicine, acts on central nerve, strengthens the inhibition process of cerebral cortex, and is also used for synthesizing medicaments for treating neurasthenia and epilepsy; can be used as chemical analysis and important components of photosensitive paper, refrigerant, fire extinguishing agent and the like; ammonium bromide, a developer for the photographic industry, and the like can also be produced.
The existing calcium bromide synthesis process takes finished bromine, refined hydrobromic acid, calcium oxide and calcium hydroxide as raw materials, so that the production cost is obviously high, and meanwhile, the process is long, the equipment is complex, the investment of manpower and energy consumption is large, and the cost tends to rise greatly.
Disclosure of Invention
The invention mainly solves the technical problem of providing a simple and convenient synthesis method of liquid calcium bromide, uses byproduct hydrobromic acid generated by other bromination products, has low price and is more economic than bromine, improves the use of bromine atoms, and changes waste into valuable in the bromine tension period; the limestone raw material is cheap and easy to obtain, the source is wide, the preparation process is simple, the yield is high, the production cost is reduced, the prepared calcium bromide product has high clarity, good solution uniformity and standard quality, and has good economic benefit.
In order to solve the technical problems, the invention adopts a technical scheme that: provides a simple synthesis method of liquid calcium bromide, which comprises the following steps:
1) limestone acidification: adding 2000kg of limestone into a 6000L batching kettle made of glass fiber reinforced plastics or PP, slowly adding 7000kg of hydrobromic acid with the content of 48 percent as a byproduct into an acidification kettle until the feed liquid is uniformly distributed, reacting for a period of time, uniformly stirring, adjusting the pH value, and adding a proper amount of active carbon;
2) and (3) settling and filtering: placing the feed liquid for sedimentation, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a turnover kettle;
3) impurity treatment, sedimentation and filtration: adding a proper amount of quicklime into the turnover kettle, adjusting the pH value, settling feed liquid for a period of time, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a neutral barrel;
4) preparing materials: neutralizing excessive lime with hydrobromic acid in a neutral barrel, sampling and testing, opening a kettle bottom valve after various indexes reach specified standards, and filtering the feed liquid through a filter press and a precision filter to obtain a colorless transparent liquid calcium bromide finished product.
In a preferred embodiment of the present invention, in the step 1), the reaction time is 3-6 hours, and the pH value is 5-6.5.
In a preferred embodiment of the present invention, in the step 2), the settling time is 4.5 hours.
In a preferred embodiment of the invention, in the step 3), the pH value is 7.5-10, and the settling time is 3-8 hours.
In a preferred embodiment of the present invention, in the step 4), the yield of the final product is 96.5% -99%.
The invention has the beneficial effects that: the invention uses the byproduct hydrobromic acid generated by other bromination products, has low price, is more economical than bromine, improves the use of bromine atoms, and changes waste into valuable in the bromine tension period; the limestone raw material is cheap and easy to obtain, the source is wide, the preparation process is simple, the yield is high, the production cost is reduced, the prepared calcium bromide product has high clarity, good solution uniformity and standard quality, and has good economic benefit.
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 simple synthesis method of liquid calcium bromide comprises the following steps:
1) limestone acidification: adding 2000kg of limestone into a 6000L batching kettle made of glass fiber reinforced plastics or PP, slowly adding 7000kg of hydrobromic acid with the content of 48 percent as a byproduct into an acidification kettle until the feed liquid is uniformly distributed, reacting for 3-6 hours, uniformly stirring, adjusting the pH value to 5-6.5, and adding a proper amount of activated carbon;
2) and (3) settling and filtering: after the feed liquid is placed and settled for 4.5 hours, the feed liquid is pumped into a plate-and-frame filter press for filter pressing, and filtrate is collected to a turnover kettle;
3) impurity treatment, sedimentation and filtration: adding a proper amount of quicklime into the turnover kettle, adjusting the pH value to 7.5-10, settling the feed liquid for 3-8 hours, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a neutral barrel;
4) preparing materials: neutralizing excessive lime with hydrobromic acid in a neutral barrel, sampling and testing, opening a kettle bottom valve after various indexes reach specified standards, and filtering the feed liquid through a filter press and a precision filter to obtain a colorless transparent liquid calcium bromide finished product with the yield of 96.5-99%.
Example one
A simple synthesis method of liquid calcium bromide comprises the following steps:
1) limestone acidification: adding 2000kg of limestone into a 6000L batching kettle made of glass fiber reinforced plastics or PP, slowly adding 7000kg of hydrobromic acid with the content of 48 percent as a byproduct into an acidification kettle until the feed liquid is uniformly distributed, reacting for 3.5 hours, uniformly stirring, adjusting the pH value to 5.5, and adding a proper amount of activated carbon;
2) and (3) settling and filtering: after the feed liquid is placed and settled for 4.5 hours, the feed liquid is pumped into a plate-and-frame filter press for filter pressing, and filtrate is collected to a turnover kettle;
3) impurity treatment, sedimentation and filtration: adding a proper amount of quicklime into the turnover kettle, adjusting the pH value to 9, settling feed liquid for 7 hours, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a neutral barrel;
4) preparing materials: neutralizing excessive lime with hydrobromic acid in a neutral barrel, sampling and testing, opening a kettle bottom valve after various indexes reach specified standards, and filtering the feed liquid through a filter press and a precision filter to obtain a colorless transparent liquid calcium bromide finished product with the yield of 98.5%.
The index parameters of each item of the product are shown in the following table.
The invention is a simple and convenient synthetic method of a liquid calcium bromide, use the by-product hydrobromic acid that other brominated products produce, do not need to prepare refined hydrobromic acid, because a large amount of bromine consuming products only consume half of bromine atoms while preparing, other half is absorbed as by water hydrobromic acid by-product, the hydrobromic acid is cheap, more economic than using bromine, has improved the use of bromine atom, in the time of bromine shortage, turn waste into wealth; the limestone raw material is cheap and easy to obtain, the source is wide, the preparation process is simple, the yield is high, after the impurities are treated by the simple process, the production cost is reduced, and the prepared calcium bromide product has high clarity, good solution uniformity, up-to-standard quality and good economic benefit.
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 (5)
1. A simple synthesis method of liquid calcium bromide is characterized in that: the method comprises the following steps:
1) limestone acidification: adding 2000kg of limestone into a 6000L batching kettle made of glass fiber reinforced plastics or PP, slowly adding 7000kg of hydrobromic acid with the content of 48 percent as a byproduct into an acidification kettle until the feed liquid is uniformly distributed, reacting for a period of time, uniformly stirring, adjusting the pH value, and adding a proper amount of active carbon;
2) and (3) settling and filtering: placing the feed liquid for sedimentation, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a turnover kettle;
3) impurity treatment, sedimentation and filtration: adding a proper amount of quicklime into the turnover kettle, adjusting the pH value, settling feed liquid for a period of time, pumping the feed liquid into a plate-and-frame filter press for filter pressing, and collecting filtrate to a neutral barrel;
4) preparing materials: neutralizing excessive lime with hydrobromic acid in a neutral barrel, sampling and testing, opening a kettle bottom valve after various indexes reach specified standards, and filtering the feed liquid through a filter press and a precision filter to obtain a colorless transparent liquid calcium bromide finished product.
2. The simple method for synthesizing liquid calcium bromide according to claim 1, wherein the method comprises the following steps: in the step 1), the reaction time is 3-6 hours, and the pH value is 5-6.5.
3. The simple method for synthesizing liquid calcium bromide according to claim 1, wherein the method comprises the following steps: in the step 2), the settling time is 4.5 hours.
4. The simple method for synthesizing liquid calcium bromide according to claim 1, wherein the method comprises the following steps: in the step 3), the PH value is 7.5-10, and the settling time is 3-8 hours.
5. The simple method for synthesizing liquid calcium bromide according to claim 1, wherein the method comprises the following steps: in the step 4), the yield of the finished product is 96.5-99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132231.4A CN113979462A (en) | 2021-09-27 | 2021-09-27 | Simple synthesis method of liquid calcium bromide |
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| CN202111132231.4A CN113979462A (en) | 2021-09-27 | 2021-09-27 | Simple synthesis method of liquid calcium bromide |
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| CN113979462A true CN113979462A (en) | 2022-01-28 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4234556A (en) * | 1979-10-05 | 1980-11-18 | The Dow Chemical Company | Method of producing calcium bromide |
| CN101391748A (en) * | 2008-10-29 | 2009-03-25 | 袁景海 | Method for preparing oilfield additive calcium bromide |
| CN101618888A (en) * | 2009-08-03 | 2010-01-06 | 山东天信化工有限公司 | Method for preparing calcium bromide solution used for oil drilling |
| CN106477615A (en) * | 2016-10-25 | 2017-03-08 | 格林美（武汉）城市矿产循环产业园开发有限公司 | For scrapping recovery system and its technique of electronic circuit board pyrolysis bromide |
| CN106745149A (en) * | 2016-12-30 | 2017-05-31 | 伊犁南岗化工有限责任公司 | A kind of method that utilization waste stone powder and discarded watery hydrochloric acid produce calcium chloride |
| CN107140672A (en) * | 2017-07-24 | 2017-09-08 | 滨州学院 | The method that waste hydrochloric acid containing organosilicon produces anhydrous calcium chloride |
-
2021
- 2021-09-27 CN CN202111132231.4A patent/CN113979462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4234556A (en) * | 1979-10-05 | 1980-11-18 | The Dow Chemical Company | Method of producing calcium bromide |
| CN101391748A (en) * | 2008-10-29 | 2009-03-25 | 袁景海 | Method for preparing oilfield additive calcium bromide |
| CN101618888A (en) * | 2009-08-03 | 2010-01-06 | 山东天信化工有限公司 | Method for preparing calcium bromide solution used for oil drilling |
| CN106477615A (en) * | 2016-10-25 | 2017-03-08 | 格林美（武汉）城市矿产循环产业园开发有限公司 | For scrapping recovery system and its technique of electronic circuit board pyrolysis bromide |
| CN106745149A (en) * | 2016-12-30 | 2017-05-31 | 伊犁南岗化工有限责任公司 | A kind of method that utilization waste stone powder and discarded watery hydrochloric acid produce calcium chloride |
| CN107140672A (en) * | 2017-07-24 | 2017-09-08 | 滨州学院 | The method that waste hydrochloric acid containing organosilicon produces anhydrous calcium chloride |
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