CN101643249A - Method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production - Google Patents
Method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production Download PDFInfo
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- CN101643249A CN101643249A CN200810139137A CN200810139137A CN101643249A CN 101643249 A CN101643249 A CN 101643249A CN 200810139137 A CN200810139137 A CN 200810139137A CN 200810139137 A CN200810139137 A CN 200810139137A CN 101643249 A CN101643249 A CN 101643249A
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- mother liquid
- aminobiphenyl
- product production
- ammonia
- waste
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Abstract
The invention discloses a method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production, which comprises: adding waste ammonia from the 4-aminobiphenyl product production into an enamel pot with a condenser; introducing sulfuric acid with stirring to neutralize the waste ammonia till the pH value of the solution is 5 to 6 and the mother liquid turns turbid, wherein in the neutralization process, the temperature rise gradually; adding ammonia into the filtrated mother liquid till the pH value of the mother liquid is 7; evaporating and crystallizing the mother liquid to separate out an ammonium sulfate product; and continuously evaporating crystal water separated out to obtain the ammonium sulfate product. The method has the characteristics of reasonable process route, low investment cost, safe and reliable operation and obvious treatment effect and solves the problem of pollution by waste acids.
Description
Technical field
The present invention relates to a kind of method of comprehensive utilization of deposed ammonia, be specifically related to the method for comprehensive utilization of waste ammonia mother liquid from 4-aminobiphenyl product production.
Background technology
In producing the 4-aminobiphenyl product production process, can produce a large amount of deposed ammonias, ammoniacal liquor content is between 12-15%, if mother liquor is not handled, will pollute, and a lot of useful composition that is contained in the mother liquor can not get recycling, cause the great wasting of resources.
Summary of the invention
In order to solve the problem of above existence, make the deposed ammonia mother liquor be recovered utilization, the invention provides a kind of method of comprehensive utilization of waste ammonia mother liquid from 4-aminobiphenyl product production, the technical scheme that it adopted is:
Waste ammonia mother liquid from 4-aminobiphenyl product production is added in the enamel pot of band condenser, stir and feed the sulfuric acid neutralization down, temperature raises gradually in the N-process, mother liquor after the filtration more a little ammonia to be neutralized to pH value be 7, evaporative crystallization separates then, obtain ammonium sulfate product, isolated crystal water continues the circulating and evaporating ammonium sulfate product.
The present invention is main raw material with the waste ammonia mother liquid from 4-aminobiphenyl product production, neutralize with sulfuric acid, neutral makes full use of neutralization heat simultaneously and realizes wet distillation, according to the similar principle that mixes, macromolecular organism dissociates out in neutral water or inorganic salt environment, separates tetramino biphenyl, according to basic soda acid salify theory, make wherein sulfuric acid and ammonia in and generate ammonium sulfate product, neutralizer is evaporation concentration, centrifugation, dry behind activated carbon decolorizing
To the ammonium sulfate product that is of high quality, is up to state standards, yield can reach more than 95%.
Reaction equation: NH3+H
2SO
4=(NH)
2SO
4
This method makes full use of neutralization heat, realize wet distillation in the time of neutralization reaction, organism tetramino biphenyl in the highly purified proposition deposed ammonia, make full use of neutralization heat preheating secondary ammonium mother liquor, reduce energy consumption greatly, make full use of and steam the ammonium sulfate product water of condensation,, reduced phreatic usage quantity as enterprise's biochemical system dilution water.This method has that operational path is reasonable, and cost of investment is low, and operational safety is reliable, the tangible characteristics of treatment effect, the by product of producing of many uses, spent acid is turned waste into wealth, be that enterprise increases economic benefit, realize recycling economy, truly solved the spent acid pollution problem.
Embodiment
Below in conjunction with embodiment the present invention is elaborated:
12-15% acid waste water 500L is added in the band condenser enamel pot, stir and feed the sulfuric acid neutralization down, temperature raises gradually in the N-process, it is muddy that waste water becomes gradually, it is muddy to be neutralized to pH value 5～6 solution becomes, filters to isolate the tetramino biphenyl crude product, obtains 4-aminobiphenyl product production after the recycling.By the mother liquor after above twice filtration more a little ammoniacal liquor to be neutralized to pH value be 7, then through decolouring, concentrate, make ammonium sulfate product behind the secondary crystal, oven dry, pulverizing, isolated crystal water continues the circulating and evaporating ammonium sulfate product.
Claims (1)
1, a kind of method of comprehensive utilization of waste ammonia mother liquid from 4-aminobiphenyl product production, it is characterized in that: waste ammonia mother liquid from 4-aminobiphenyl product production is added in the enamel pot of band condenser, stir and feed the sulfuric acid neutralization down, temperature raises gradually in the N-process, be neutralized to pH value 5～6 o'clock mother liquor and become muddy, the mother liquor after the filtration more a little ammonia to be neutralized to pH value be 7, evaporative crystallization separates then, obtain ammonium sulfate product, isolated crystal water continues the circulating and evaporating ammonium sulfate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810139137A CN101643249A (en) | 2008-08-08 | 2008-08-08 | Method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810139137A CN101643249A (en) | 2008-08-08 | 2008-08-08 | Method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101643249A true CN101643249A (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN200810139137A Pending CN101643249A (en) | 2008-08-08 | 2008-08-08 | Method for comprehensively using waste ammonia mother liquid from 4-aminobiphenyl product production |
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| CN (1) | CN101643249A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753235A (en) * | 2016-03-07 | 2016-07-13 | 吴江梅堰三友染料化工有限公司 | 3, 3', 4, 4'-tetraaminobiphenyl wastewater comprehensive treatment and resource utilization method |
| CN109928871A (en) * | 2019-04-11 | 2019-06-25 | 山东昌邑海能化学有限责任公司 | A kind of method of high-purity synthesis anthraquinone coproduction of ammonia sulfate |
-
2008
- 2008-08-08 CN CN200810139137A patent/CN101643249A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753235A (en) * | 2016-03-07 | 2016-07-13 | 吴江梅堰三友染料化工有限公司 | 3, 3', 4, 4'-tetraaminobiphenyl wastewater comprehensive treatment and resource utilization method |
| CN109928871A (en) * | 2019-04-11 | 2019-06-25 | 山东昌邑海能化学有限责任公司 | A kind of method of high-purity synthesis anthraquinone coproduction of ammonia sulfate |
| CN109928871B (en) * | 2019-04-11 | 2022-06-21 | 山东昌邑海能化学有限责任公司 | Method for high-purity anthraquinone synthesis and ammonium sulfate co-production |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100210 |