CN1974556A - Process of producing refined quinoline with quinoline fraction as material - Google Patents
Process of producing refined quinoline with quinoline fraction as material Download PDFInfo
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- CN1974556A CN1974556A CN 200610134602 CN200610134602A CN1974556A CN 1974556 A CN1974556 A CN 1974556A CN 200610134602 CN200610134602 CN 200610134602 CN 200610134602 A CN200610134602 A CN 200610134602A CN 1974556 A CN1974556 A CN 1974556A
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Abstract
The present invention relates to coal chemical technology, and is especially process of producing refined quinoline product. The process includes the following steps: 1. heating quinoline material containing quinoline in 25-35 % as material in a coarse rectifying kettle and vacuum distilled in a coarse rectifying tower with theoretical plate number 30- 40 to obtain quinoline fraction containing quinoline over 65 %; and 2. further heating the quinoline fraction in a refining rectifying kettle and vacuum distilled in a coarse rectifying tower with theoretical plate number 60-90 to obtain quinoline product containing quinoline over 99 %.
Description
Technical field
The present invention relates to technical field of coal chemical industry, be a kind of be the method for the refining quinoline of raw material production with the quinoline cut.
Background technology
Existing quinoline production technique is to be raw material with heavy pyridine in the tar, by rectifying extraction quinoline content greater than 55% quinoline cut, be raw material with the quinoline cut then, rectifying obtains technical quinoline, and (quality is that 235 ℃～240 ℃ quantity of distillate are not less than 95%, quinoline content is greater than 90%), technical quinoline is because quinoline content is low, and sale is restricted, and quinoline content is wider greater than 99% refining quinoline purposes, and market sale is better.
The separation and refining method of quinoline, nearly following several: phosphate process, sulphate process, rectification method, hydrochloric acid-benzene counter-current extraction.
(1) phosphate process: this method is that different solubility in water is realized isolating according to phosphoric acid quinoline and phosphoric acid isoquinoline 99.9.Phosphoric acid isoquinoline 99.9 is soluble in water, and the phosphoric acid quinoline is then not soluble in water.
(2) sulphate process: this method is the difference of the solubleness in ethanol according to quinoline sulfate and sulfuric acid isoquinoline 99.9 and isolating.
(3) rectification method:, utilize quinoline to separate with the isoquinoline 99.9 boiling-point difference by rectifying tower.
(4) hydrochloric acid-benzene counter-current extraction: utilize the alkalescence of isoquinoline 99.9 stronger slightly, quinoline is concentrated in the benzene gradually, and isoquinoline 99.9 is concentrated in the hydrochloric acid than quinoline.
Comparatively speaking, all select for use strong acid to do reactant in (1), (2), (4) method, the equipment requirements height, the technology relative complex, and method (3) does not have strong acid, technology is simple relatively, so we select the method for the method of rectifying as development for use.The production of rectifying is used wider at chemical general factory, the particularly use of tray column, but board-like column efficiency is lower, is difficult to satisfy.
Through the domestic literature retrieval, find and three pieces of this project pertinent literatures:
1, Chinese patent " producing the method for smart quinoline from technical quinoline ", the patent No.: ZL99112606.8, publication number: 1259516;
2, Chinese patent " method of refining quinoline from the coal tar crude quinoline ", the patent No.: ZL96117038.7, publication number: 1172106;
3, network information: www.aggroupchem.com/about-c.htm
Check result is with to look into the contrast of new point as follows: it is described to look into new point one, with quinoline cut (content is greater than 65%) is raw material, smart quinoline (content is greater than 98.5%) is produced in a rectifying: wherein be raw material with the quinoline, existing mentioning in document one, but its material content is different with this authorized item with technology.It is described to look into new point two, adopts corrugated-plate packed tower to replace bubble-plate column production, does not see that document mentions.
Conclusion is as follows: this client is a raw material with quinoline cut (content is greater than 65%), and smart quinoline (content is greater than 98.5%) is produced in a rectifying, and adopts corrugated-plate packed tower to replace bubble-plate column in quinoline rectifying is produced, and does not domesticly see bibliographical information.
Summary of the invention
The purpose of this invention is to provide a kind of is the method for the refining quinoline of raw material production with the quinoline cut, this method is to be raw material with quinoline cut (quinoline content is greater than 65%), smart quinoline (quinoline content is greater than 99%) is produced in a rectifying, and adopts high-efficient spiral-screen column in quinoline rectifying is produced.
For achieving the above object, the present invention adopts following technical scheme to realize:
With the quinoline cut is the method for the refining quinoline of raw material production, it is characterized in that this method comprises the steps:
1) the heavy pyridine of the raw material of quinoline content 25%～35% is packed into heat in the rough rectifying still, underpressure distillation in the rough rectifying tower of 30～40 of theoretical stage number, extraction quinoline content is greater than 65% quinoline cut;
2) being that raw material is packed into and heated in the refining rectifying still with the quinoline cut, is underpressure distillation in 60～90 the refining rectifying tower in theoretical stage number, and extraction quinoline content is greater than 99% smart quinoline.
The top vacuum degree of described rough rectifying tower is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.015～0.035MPa.
The reflux ratio of described rough rectifying tower is 5-10.
The top vacuum degree of described refining rectifying tower is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.005～0.020MPa.
The reflux ratio of described refining rectifying tower is 5-20.
The present invention's beneficial effect compared with prior art is: this method is to be raw material with the quinoline cut, and smart quinoline is produced in a rectifying, and adopts high-efficient spiral-screen column in quinoline rectifying is produced, and quinoline content is greater than 99%.
Embodiment
With the quinoline cut is the method for the refining quinoline of raw material production, and this method comprises the steps:
1) the heavy pyridine of raw material (quinoline content 25%～35%) is packed into heats underpressure distillation in rough rectifying tower (30～40 of theoretical plate numbers), extraction quinoline cut (quinoline content is greater than 65%) in the rough rectifying still.The top vacuum degree is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.015～0.035MPa.
2) be that raw material is packed into and heated in the refining rectifying still with the quinoline cut, underpressure distillation in refining rectifying tower (theoretical plate number is 60～90), extraction quinoline cut (quinoline content is greater than 65%), technical quinoline (quinoline content is greater than 90%), smart quinoline (quinoline content is greater than 99%).The top vacuum degree is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.005～0.020MPa.
Claims (5)
1, is the method for the refining quinoline of raw material production with the quinoline cut, it is characterized in that this method comprises the steps:
1) the heavy pyridine of the raw material of quinoline content 25%～35% is packed into heat in the rough rectifying still, underpressure distillation in the rough rectifying tower of 30～40 of theoretical stage number, extraction quinoline content is greater than 65% quinoline cut;
2) being that raw material is packed into and heated in the refining rectifying still with the quinoline cut, is underpressure distillation in 60～90 the refining rectifying tower in theoretical stage number, and extraction quinoline content is greater than 99% smart quinoline.
2, according to claim 1 is the method for the refining quinoline of raw material production with the quinoline cut, and it is characterized in that: the top vacuum degree of described rough rectifying tower is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.015～0.035MPa.
3, according to claim 1 is the method for the refining quinoline of raw material production with the quinoline cut, and it is characterized in that: the reflux ratio of described rough rectifying tower is 5-10.
4, according to claim 1 is the method for the refining quinoline of raw material production with the quinoline cut, and it is characterized in that: the top vacuum degree of described refining rectifying tower is 0.080～0.095MPa, and the pressure drop of tower vacuum is 0.005～0.020MPa.
5, according to claim 1 is the method for the refining quinoline of raw material production with the quinoline cut, and it is characterized in that: the reflux ratio of described refining rectifying tower is 5-20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134602 CN1974556A (en) | 2006-12-08 | 2006-12-08 | Process of producing refined quinoline with quinoline fraction as material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134602 CN1974556A (en) | 2006-12-08 | 2006-12-08 | Process of producing refined quinoline with quinoline fraction as material |
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| CN1974556A true CN1974556A (en) | 2007-06-06 |
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| CN 200610134602 Pending CN1974556A (en) | 2006-12-08 | 2006-12-08 | Process of producing refined quinoline with quinoline fraction as material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979381A (en) * | 2010-12-05 | 2011-02-23 | 天津市华瑞奕博化工科技有限公司 | Method for refining crude quinoline by continuous rectification |
| CN102603626A (en) * | 2012-03-30 | 2012-07-25 | 上海乾昆化工科技有限公司 | Separation and purification process of chinoline with high purity |
| CN108395400A (en) * | 2017-02-08 | 2018-08-14 | 鞍钢股份有限公司 | A kind of technique of industrialized production 2- methylquinoline fractions |
| CN108393022A (en) * | 2017-02-08 | 2018-08-14 | 鞍钢股份有限公司 | A kind of isoquinolin deployment device and technique |
| CN114516816A (en) * | 2022-02-24 | 2022-05-20 | 深圳瑞华泰薄膜科技股份有限公司 | Method and device for recovering DMAC (dimethyl acetamide) and isoquinoline from solution |
-
2006
- 2006-12-08 CN CN 200610134602 patent/CN1974556A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979381A (en) * | 2010-12-05 | 2011-02-23 | 天津市华瑞奕博化工科技有限公司 | Method for refining crude quinoline by continuous rectification |
| CN101979381B (en) * | 2010-12-05 | 2012-05-23 | 天津市华瑞奕博化工科技有限公司 | Method for refining crude quinoline by continuous rectification |
| CN102603626A (en) * | 2012-03-30 | 2012-07-25 | 上海乾昆化工科技有限公司 | Separation and purification process of chinoline with high purity |
| CN108395400A (en) * | 2017-02-08 | 2018-08-14 | 鞍钢股份有限公司 | A kind of technique of industrialized production 2- methylquinoline fractions |
| CN108393022A (en) * | 2017-02-08 | 2018-08-14 | 鞍钢股份有限公司 | A kind of isoquinolin deployment device and technique |
| CN114516816A (en) * | 2022-02-24 | 2022-05-20 | 深圳瑞华泰薄膜科技股份有限公司 | Method and device for recovering DMAC (dimethyl acetamide) and isoquinoline from solution |
| CN114516816B (en) * | 2022-02-24 | 2023-12-01 | 深圳瑞华泰薄膜科技股份有限公司 | Method and device for recycling DMAC and isoquinoline from solution |
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Open date: 20070606 |