CN104086353A - Bromobenzene synthesis production process - Google Patents
Bromobenzene synthesis production process Download PDFInfo
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- CN104086353A CN104086353A CN201410264604.7A CN201410264604A CN104086353A CN 104086353 A CN104086353 A CN 104086353A CN 201410264604 A CN201410264604 A CN 201410264604A CN 104086353 A CN104086353 A CN 104086353A
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- bromobenzene
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Abstract
The invention relates to a bromobenzene synthesis production process, and relates to the technical field of chemical engineering. According to the invention, first, benzene and iron powder are weighed and are added into a 1000L reaction kettle. The temperature is controlled at 25-35 DEG C, and the mixture is stirred. Bromine is weighed and is dropped into the reaction kettle within 6h. When hydrogen bromide gas is produced, the temperature in the kettle is increased to 70-80 DEG C, and a constant-temperature reaction is carried out for 2h. An obtained material is washed and is allowed to stand for stratification. The obtained material is dried, and a fraction at the temperature of 155-157 DEG C is collected under normal pressure, such that a finished product is obtained. The finished product is packaged and stored. The process provided by the invention has the following advantages: preparation is convenient and simple; the process is environment-friendly and pollution-free; raw materials are easy to obtain; equipment investment is low; product purity is high; operation is convenient; the prepared bromobenzene has good application effect; and the prepared bromobenzene is safe and reliable.
Description
Technical field
The present invention relates to chemical technology field, be specifically related to the synthetic production technique of a kind of bromobenzene.
Background technology
Bromobenzene, bromobenzene, organic compound, colourless oil liquid, has the smell of benzene.Water insoluble, be dissolved in most organic solvents such as methyl alcohol, ether, acetone, bromobenzene can be used as pressure-sensitive and raw material heat sensitive dye; The raw material of phenyl ether series spices; Pesticide material, produces sterilant bromopropylate; Medical material, produces dipron and antitussive, as solvent, automobile fuel, organic synthesis raw material, pharmacy intermediate etc.; For the synthesis of medicine, agricultural chemicals, dyestuff etc.; Bromobenzene is the raw material of fine chemical product, is also the basic raw material of preparing agricultural chemicals; Organic synthesis raw material., there is the problems such as yield is low, purity is not high in suitability for industrialized production in medicine intermediate, and production technique is comparatively complicated, is difficult to meet human wants at present.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of purity high, the production technique that the simple bromobenzene of preparation technology is synthetic.
Technical problem to be solved by this invention realizes by the following technical solutions:
The production technique that bromobenzene is synthetic, is characterized in that: comprise following processing step,
A. take the benzene of 320-340kg and the iron powder of 90-110kg.
B. benzene and iron powder are dropped in the reactor of 1000L, the temperature of reactor is controlled to 25-35 ℃.
C. the material in reactor is stirred, and the bromine that takes 640-660kg drops in reactor within 6h.
D., after having bromination hydrogen to produce, temperature in the kettle is warming up to 70-80 ℃ and isothermal reaction 2h in reactor.
E. the mixture after hydrolysis reaction in steps d is added in water-and-oil separator, the sodium hydroxide solution of employing 5% washs, then stratification.
F. adopt Calcium Chloride Powder Anhydrous to be dried in the oil reservoir in step e, then drop in rectifying tower and heat temperature raising.
G. the cut of mixture in the rectifying tower in step f being collected under normal pressure to 155-157 ℃ is finished product, then finished product packing is put in storage.
The reactor adopting in described step b-f is enamel reaction still.
The invention has the beneficial effects as follows: the present invention is easy to prepare simple, and environment friendly and pollution-free, raw material is easy to get, and facility investment is few, and purity is high, convenient operation, the bromobenzene result of use of preparation is good, safe and reliable.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with specific embodiment, further set forth the present invention.
Embodiment 1
The production technique that bromobenzene is synthetic, comprises following processing step,
A. take the benzene of 320kg and the iron powder of 90kg.
B. benzene and iron powder are dropped in the enamel reaction still of 1000L, the temperature of reactor is controlled to 25 ℃.
C. the material in enamel reaction still is stirred, and the bromine that takes 640kg drops in enamel reaction still within 6h.
D., after having bromination hydrogen to produce, temperature in the kettle is warming up to 70 ℃ and isothermal reaction 2h in enamel reaction still.
E. the mixture after hydrolysis reaction in steps d is added in water-and-oil separator, the sodium hydroxide solution of employing 5% washs, then stratification.
F. adopt Calcium Chloride Powder Anhydrous to be dried in the oil reservoir in step e, then drop in rectifying tower and heat temperature raising.
G. the cut of mixture in the rectifying tower in step f being collected under normal pressure to 155 ℃ is finished product, then finished product packing is put in storage.
Embodiment 2
The production technique that bromobenzene is synthetic, comprises following processing step,
A. take the benzene of 330kg and the iron powder of 100kg.
B. benzene and iron powder are dropped in the enamel reaction still of 1000L, the temperature of enamel reaction still is controlled to 30 ℃.
C. the material in enamel reaction still is stirred, and the bromine that takes 650kg drops in enamel reaction still within 6h.
D., after having bromination hydrogen to produce, temperature in the kettle is warming up to 75 ℃ and isothermal reaction 2h in enamel reaction still.
E. the mixture after hydrolysis reaction in steps d is added in water-and-oil separator, the sodium hydroxide solution of employing 5% washs, then stratification.
F. adopt Calcium Chloride Powder Anhydrous to be dried in the oil reservoir in step e, then drop in rectifying tower and heat temperature raising.
G. the cut of mixture in the rectifying tower in step f being collected under normal pressure to 156 ℃ is finished product, then finished product packing is put in storage.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. the synthetic production technique of bromobenzene, is characterized in that: comprise following processing step,
A. take the benzene of 320-340kg and the iron powder of 90-110kg.
B. benzene and iron powder are dropped in the reactor of 1000L, the temperature of reactor is controlled to 25-35 ℃.
C. the material in reactor is stirred, and the bromine that takes 640-660kg drops in reactor within 6h.
D., after having bromination hydrogen to produce, temperature in the kettle is warming up to 70-80 ℃ and isothermal reaction 2h in reactor.
E. the mixture after hydrolysis reaction in steps d is added in water-and-oil separator, the sodium hydroxide solution of employing 5% washs, then stratification.
F. adopt Calcium Chloride Powder Anhydrous to be dried in the oil reservoir in step e, then drop in rectifying tower and heat temperature raising.
G. the cut of mixture in the rectifying tower in step f being collected under normal pressure to 155-157 ℃ is finished product, then finished product packing is put in storage.
2. the synthetic production technique of a kind of bromobenzene according to claim 1, is characterized in that: the reactor adopting in described step b-f is enamel reaction still.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410264604.7A CN104086353A (en) | 2014-06-13 | 2014-06-13 | Bromobenzene synthesis production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410264604.7A CN104086353A (en) | 2014-06-13 | 2014-06-13 | Bromobenzene synthesis production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104086353A true CN104086353A (en) | 2014-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410264604.7A Pending CN104086353A (en) | 2014-06-13 | 2014-06-13 | Bromobenzene synthesis production process |
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| CN (1) | CN104086353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194562A (en) * | 2020-09-03 | 2021-01-08 | 潍坊摩根化工有限公司 | Preparation method of bromobenzene |
-
2014
- 2014-06-13 CN CN201410264604.7A patent/CN104086353A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李和平: "《含氟、溴、碘精细化学品 功能元素精细有机化学品结构、性质与合成》", 30 September 2010, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194562A (en) * | 2020-09-03 | 2021-01-08 | 潍坊摩根化工有限公司 | Preparation method of bromobenzene |
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Application publication date: 20141008 |