CN101580455A - Separation process of m-dichlorobenzene from tar - Google Patents
Separation process of m-dichlorobenzene from tar Download PDFInfo
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- CN101580455A CN101580455A CNA2009101356972A CN200910135697A CN101580455A CN 101580455 A CN101580455 A CN 101580455A CN A2009101356972 A CNA2009101356972 A CN A2009101356972A CN 200910135697 A CN200910135697 A CN 200910135697A CN 101580455 A CN101580455 A CN 101580455A
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- dichlorobenzene
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Abstract
The invention discloses a separation process of m-dichlorobenzene from tar, which comprises the following steps of: inputting tar into a coarse separating tower with the tower top temperature being 45 to 47 DEG C, the tower bottom temperature being 92 to 94 DEG C and the pressure being 10 Kpa, and separating substances with the boiling point being below 130 DEG C in the coarse separating tower; and filling the bottom liquor with the substances with low boiling point removed in a rectifying tower for distilling with the tower top temperature being 90 DEG C, the tower bottom temperature being 105 to 115 DEG C and the pressure being 10 to 15 Mpa, removing high-boiling point substances with the boiling point being 178 to 230 DEG C and other solid-phase impurities, and obtaining the m-dichlorobenzene. The process has the advantages of adopting a combination mode of rectification separation and crystallization for treatment of the solid waste and finally obtaining the m-dichlorobenzene product with higher purity, thus not only protecting environment, but also creating certain economic value and social benefit.
Description
Technical field
The present invention relates to Meta Dichlorobenzene separating technology in a kind of tar, be specifically related to Meta Dichlorobenzene separating technology in a kind of tar that can effectively extract Meta Dichlorobenzene and non-environmental-pollution.
Background technology
Tar is common solid-liquid waste during petrochemical complex is produced, and contains wherein that a small amount of chlorobenzene, Meta Dichlorobenzene, santochlor, orthodichlorobenzene, trichlorobenzene and some are lowly boiled, high boiling material and other produces or residual various solid, liquid impurity in process of production in a large number.The Meta Dichlorobenzene that contains in this waste is a kind of rare medicine intermediate raw material, because content seldom in the tar dichlorobenzene, but the boiling temperature gap is very little between itself and other dichlorobenzene, therefore will extract relatively difficulty of high-content product, always as solid useless the processing.Also have filtered simply, distilled, burning etc., it is low that these processing methodes exist production efficiency, Meta Dichlorobenzene can't be separated, resource serious waste, and safety coefficient is little in process of production, labour intensity is big, has greater environmental impacts.
Summary of the invention
Main task of the present invention is to provide Meta Dichlorobenzene separating technology in a kind of tar, is specifically related to Meta Dichlorobenzene separating technology in a kind of tar that can effectively extract Meta Dichlorobenzene and non-environmental-pollution.
In order to solve above technical problem, Meta Dichlorobenzene separating technology in a kind of tar of the present invention is separated by the crystallization of compartment dichlorobenzene, the smart tower that divides, and cryogenic crystallization four steps constitute, and finally obtains purity and be 75% Meta Dichlorobenzene; It is characterized in that: described separating step is: it is 45-47 ℃ that tar is input into tower top temperature, and tower still temperature is 92-94 ℃, and pressure is the rough segmentation tower of 10Kpa, separates the material of boiling point under 130 ℃ in the rough segmentation tower; To remove lower boiling still liquid again and lead to into rectifying tower, in tower top temperature is 90 ℃, and tower still temperature is 105-115 ℃, and pressure is to distill under the condition of 10-15Mpa, remove high boiling substance and other the solid phase impurity of boiling point between 178-230 ℃, obtain Meta Dichlorobenzene.
The advantage of above technology is: the technology of the present invention adopts rectifying separation and crystallization phases bonded mode that above-mentioned solid refuse is handled.Preferably more suitable Technology adopts advanced support equipment, finally obtains the higher Meta Dichlorobenzene product of purity, has both satisfied the needs of market to product, has solved the many drawback of outmoded technology mode in sepn process again.Not only protected environment, can also create certain economic and be worth and social benefit.
Embodiment
Meta Dichlorobenzene separating technology in a kind of tar of the present invention is separated by the crystallization of compartment dichlorobenzene, the smart tower that divides, and cryogenic crystallization four steps constitute, and finally obtains purity and be 75% Meta Dichlorobenzene.Described Meta Dichlorobenzene crystalline separating step is that roughing out constitutes with the smart two portions that separate, its rough segmentation step is: it is 45-47 ℃ that tar is input into tower top temperature, tower still temperature is 92-94 ℃, and pressure is the rough segmentation tower of 10Kpa, separates the material of boiling point under 130 ℃ in the rough segmentation tower; Its smart separating step is: will remove lower boiling still liquid and lead to into rectifying tower, in tower top temperature is 90 ℃, tower still temperature is 105-115 ℃, and pressure is to distill under the condition of 10-15Mpa, removes high boiling substance and other the solid phase impurity of boiling point between 178-230 ℃.
Meta Dichlorobenzene after essence separated is by conventional cryogenic crystallization method, obtains purity and be 75% Meta Dichlorobenzene.
Claims (1)
1, Meta Dichlorobenzene separating technology in a kind of tar is separated by the crystallization of compartment dichlorobenzene, the smart tower that divides, and cryogenic crystallization four steps constitute, and finally obtains purity and be 75% Meta Dichlorobenzene; It is characterized in that: described separating step is: it is 45-47 ℃ that tar is input into tower top temperature, and tower still temperature is 92-94 ℃, and pressure is the rough segmentation tower of 10Kpa, separates the material of boiling point under 130 ℃ in the rough segmentation tower; To remove lower boiling still liquid again and lead to into rectifying tower, in tower top temperature is 90 ℃, and tower still temperature is 105-115 ℃, and pressure is to distill under the condition of 10-15Mpa, remove high boiling substance and other the solid phase impurity of boiling point between 178-230 ℃, obtain Meta Dichlorobenzene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101356972A CN101580455A (en) | 2009-04-27 | 2009-04-27 | Separation process of m-dichlorobenzene from tar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101356972A CN101580455A (en) | 2009-04-27 | 2009-04-27 | Separation process of m-dichlorobenzene from tar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101580455A true CN101580455A (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101356972A Pending CN101580455A (en) | 2009-04-27 | 2009-04-27 | Separation process of m-dichlorobenzene from tar |
Country Status (1)
| Country | Link |
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| CN (1) | CN101580455A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891586A (en) * | 2010-08-19 | 2010-11-24 | 江苏隆昌化工有限公司 | Process for extracting high-purity m-dichlorobenzene from solid waste chlorobenzene tar |
| CN101898947A (en) * | 2010-08-19 | 2010-12-01 | 江苏隆昌化工有限公司 | Method for producing 2,4-dichloroacetophenone by using solid waste chlorobenzene tar as raw material |
-
2009
- 2009-04-27 CN CNA2009101356972A patent/CN101580455A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891586A (en) * | 2010-08-19 | 2010-11-24 | 江苏隆昌化工有限公司 | Process for extracting high-purity m-dichlorobenzene from solid waste chlorobenzene tar |
| CN101898947A (en) * | 2010-08-19 | 2010-12-01 | 江苏隆昌化工有限公司 | Method for producing 2,4-dichloroacetophenone by using solid waste chlorobenzene tar as raw material |
| CN101891586B (en) * | 2010-08-19 | 2012-12-26 | 江苏隆昌化工有限公司 | Process for extracting high-purity m-dichlorobenzene from solid waste chlorobenzene tar |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091118 |