CN1403426A - Method of eliminating alkali matter in toluene - Google Patents
Method of eliminating alkali matter in toluene Download PDFInfo
- Publication number
- CN1403426A CN1403426A CN 01126747 CN01126747A CN1403426A CN 1403426 A CN1403426 A CN 1403426A CN 01126747 CN01126747 CN 01126747 CN 01126747 A CN01126747 A CN 01126747A CN 1403426 A CN1403426 A CN 1403426A
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- Prior art keywords
- toluene
- alkali matter
- neutral
- alkali
- product
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Abstract
The method of eliminating alkali matter in toluene is to make toluene containing alkali matter pass through acid granulated white clay bed layer at the operation temperature 40-150 deg.c. operation pressure 0.5-1.5 MPa and liquid space velocity 1.0-3.0 /hr. The acid granulated white clay has a specific surface area of 150-200 sq m/g and acidity of pH 3-5. The toluene product always contains alkali matter and this limits its application range. The method of the present invention eliminates the alkali matter via extracting and distillation process to obtain toluene product without alkali matter and this raises the quality of the toluene product.
Description
Technical field
The invention belongs to the refining of toluene, remove alkaline impurities in the toluene with sorbing material more precisely.
Background technology
Toluene is the important source material of synthon, resin rubber and medicine.Along with the petrochemical complex industrial expansion, aromatics separation from the hydrogenated gasoline of reformate oil and cracking ethylene preparation by-product has been the main source of toluene.The method of aromatics separation has methods such as solvent extraction process, absorption method, extractive distillation, component distillation from reformate oil and cracking hydrogenated gasoline, and wherein, solvent extraction process is industrial the most commonly used.But in recent years, much more more and more the extractive distillation method is applied, and this is because extractive distillation is more simpler than solvent extraction process technical process, and energy consumption is low and do not have an industrial pollution.The extractive distillation method is that solvent is to the C in the hydrogenated gasoline with the N-formyl morpholine
6～C
7Fraction carries out extractive distillation, wherein aromatic hydrocarbons is separated with non-aromatics, and through distillation, obtain product purified petroleum benzin and pure toluene respectively.Yet the shortcoming of this processing method is the alkaline substance that has trace in the toluene product that obtains, and this its purposes of toluene that contains micro-alkaline substance is very restricted, so price is much lower relatively.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that removes toluene neutral and alkali thing; for from the hydrogenated gasoline of reformate oil and cracking ethylene preparation by-product; with the N-formyl morpholine is the toluene product that solvent obtains by the extractive distillation method, and this method can remove the wherein alkaline substance of trace with higher efficient.
Technical scheme of the present invention is: the toluene that will contain alkaline substance is by acid particles carclazyte bed, and service temperature is 40～150 ℃, and working pressure is 0.5～1.5MPa, and the liquid air speed is 1.0～3.0hr
-1
The specific surface area of above-mentioned acid particles carclazyte is 150～200m
2/ g, acidity is PH 3～5.
And service temperature is preferably 45～65 ℃; Working pressure is preferably 0.6～1.0MPa; The liquid air speed is preferably 1.2～2.0hr
-1
The contriver is by discovering, the alkaline substance in the toluene that is obtained by above-mentioned extractive distillation method mainly is a morpholine.This is owing to the water that contains 100-200 μ g/g in the common raw material pyrolysis gasoline, and fresh solvent N-formyl morpholine itself also usually contains the moisture content about 2000 μ g/g, and the N-formyl morpholine is met water can hydrolysis generate morpholine and formic acid.The boiling point of morpholine is 128 ℃, and the boiling point of toluene is 110.6 ℃, and both are close by boiling point, so exists morpholine just unavoidable in the product toluene.
Molecular structure according to morpholine can be found, divides the active nitrogen in the subring to have not paired lone electron at morpholine, and it is electron donor (lewis base).And the acid particles carclazyte of describing in the technique scheme is because it has the unoccupied orbital of accepting electronics, be the receptor (lewis acid) of electronics, both can produce the stronger rail key of joining, when morpholine during near solid adsorbent, just by the absorption of the acid site of solid surface, from toluene, remove.
The acid particles carclazyte generally can be filled in the adsorption tower, and the toluene that contains alkaline substance just can be finished removing of alkaline substance by adsorption tower, and according to the content of raw material toluene neutral and alkali thing, be about 3～5 months the work-ing life of granular carclazyte.
Positively effect of the present invention is very tangible, and it provides a kind of easier method, can remove the micro-alkaline substance in the toluene product that is obtained by above-mentioned extractive distillation technology with lower cost, has improved the quality of product.
Embodiment
Embodiment 1～10:
At diameter is 1.5m, and height is filling 8.0m in the adsorption tower of 8.0m
3The acid particles carclazyte, the specific surface area of acid particles carclazyte is 150～200m
2/ g, acidity is PH 3～5.The toluene that will contain alkaline substance by required processing condition passes through adsorption tower.The concrete processing condition of each embodiment and the toluene morpholine content before and after handling sees Table 1.Table 1.
| Temperature (℃) | Pressure (MPa) | Liquid air speed (hr -1) | Morpholine content (μ g/g) before handling | Handle back morpholine content (μ g/g) | |
| Embodiment 1 | ????45 | ????0.5 | ????1.0 | ????69 | ????≤1 |
| Embodiment 2 | ????60 | ????0.5 | ????1.0 | ????62 | ????≤1 |
| Embodiment 3 | ????85 | ????0.5 | ????1.2 | ????55 | ????≤1 |
| Embodiment 4 | ????100 | ????0.6 | ????1.0 | ????77 | ????≤1 |
| Embodiment 5 | ????45 | ????1.0 | ????1.5 | ????95 | ????≤1 |
| Embodiment 6 | ????80 | ????1.0 | ????1.5 | ????71 | ????≤1 |
| Embodiment 7 | ????120 | ????1.2 | ????1.5 | ????88 | ????≤1 |
| Embodiment 8 | ????50 | ????1.5 | ????2.0 | ????132 | ????≤2 |
| Embodiment 9 | ????100 | ????1.5 | ????2.5 | ????59 | ????≤1 |
| Embodiment 10 | ????150 | ????1.5 | ????2.5 | ????83 | ????≤2 |
Claims (5)
1, a kind of method that removes toluene neutral and alkali thing, the toluene that will contain alkaline substance is by acid particles carclazyte bed, and service temperature is 40～150 ℃, and working pressure is 0.5～1.5MPa, and the liquid air speed is 1.0～3.0hr
-1
2, the method that removes toluene neutral and alkali thing according to claim 1, the specific surface area that it is characterized in that described acid particles carclazyte is 150～200m
2/ g, acidity is PH 3～5.
3, the method that removes toluene neutral and alkali thing according to claim 1 is characterized in that described service temperature is 45～65 ℃.
4, the method that removes toluene neutral and alkali thing according to claim 1 is characterized in that described working pressure is 0.6～1.0MPa.
5, the method that removes toluene neutral and alkali thing according to claim 1 is characterized in that described liquid air speed is 1.2～2.0hr
-1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126747 CN1403426A (en) | 2001-09-13 | 2001-09-13 | Method of eliminating alkali matter in toluene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126747 CN1403426A (en) | 2001-09-13 | 2001-09-13 | Method of eliminating alkali matter in toluene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1403426A true CN1403426A (en) | 2003-03-19 |
Family
ID=4666752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01126747 Pending CN1403426A (en) | 2001-09-13 | 2001-09-13 | Method of eliminating alkali matter in toluene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1403426A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317245C (en) * | 2004-09-28 | 2007-05-23 | 中国石油化工股份有限公司 | Refining method for toluene containing nitrogen and olefin |
| CN100344592C (en) * | 2005-03-31 | 2007-10-24 | 中国石油化工股份有限公司 | Process for refining benzene raw materials containing basic nitrogen and olefin impurity |
| CN103044184A (en) * | 2011-10-14 | 2013-04-17 | 中国石油化工集团公司 | Device and method for refining dimethylbenzene of continuous catalytic reforming device |
| CN104557420A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Toluene denitrification method |
-
2001
- 2001-09-13 CN CN 01126747 patent/CN1403426A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317245C (en) * | 2004-09-28 | 2007-05-23 | 中国石油化工股份有限公司 | Refining method for toluene containing nitrogen and olefin |
| CN100344592C (en) * | 2005-03-31 | 2007-10-24 | 中国石油化工股份有限公司 | Process for refining benzene raw materials containing basic nitrogen and olefin impurity |
| CN103044184A (en) * | 2011-10-14 | 2013-04-17 | 中国石油化工集团公司 | Device and method for refining dimethylbenzene of continuous catalytic reforming device |
| CN103044184B (en) * | 2011-10-14 | 2015-01-21 | 中国石油化工集团公司 | Device and method for refining dimethylbenzene |
| CN104557420A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Toluene denitrification method |
| CN104557420B (en) * | 2013-10-11 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of method of toluene denitrogenation |
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