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Method for refining coking benzene-type products containing nitrogen impurities

A technology for nitrogen-containing impurities and purification methods, which can be used in organic chemistry, adsorption purification/separation, etc., and can solve problems such as insignificant effects.

Active Publication Date: 2010-06-23
BAOWU CHARCOAL MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For benzene products with a nitride concentration below 10 mg / kg, the effect of the above method is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0028] The following examples illustrate the process of treating a benzene simulated solution containing morpholine nitride impurities (benzene simulated solution is a nitrogenous solution configured with pure benzene and nitrides) with the method of the present invention.

[0029]Take the modified attapulgite as an adsorbent, put it in a quartz tube with a diameter of 8 mm, pass the benzene simulated solution containing 1.0 mg / kg of morpholine impurities in terms of nitrogen content through the modified attapulgite under different conditions Soil adsorption column. See Table 1 for the treatment conditions and the nitrogen content in the benzene simulated solution after treatment. The determination of nitrogen content can use ANTEK-9000 series sulfur and nitrogen element analyzer (the following examples are the same), and ANTEK-9000 series sulfur and nitrogen element analyzer is a product of Antek Company, a subsidiary of U.S. PAC Group (Petroleum Analyzer Company L.P.).

Embodiment 7～12

[0031] The following examples illustrate the process of treating a toluene simulated solution containing morpholine nitride impurities with the method of the present invention.

[0032] The modified attapulgite was used as the adsorbent, and it was installed in a quartz tube with a diameter of 8 mm. The simulated toluene solution containing 5.0 mg / kg of morpholine impurities in terms of nitrogen content was passed through the adsorption column under different conditions. See Table 2 for the treatment conditions and the nitrogen content in the simulated toluene solution after treatment.

[0033] Table 1

[0034] Example

processing conditions

Nitrogen content (mg / kg)

1

Room temperature, 1.0m / h

0.23

2

40℃, 4m / h

0.31

3

40℃, 6m / h

0.36

4

50℃, 6m / h

0.30

5

60℃, 6m / h

0.22

6

80℃, 6m / h

0.19

[0035] Table 2

[0036] Example

Embodiment 13～18

[0038] The following examples illustrate the process of treating nitrogen compounds in coking benzene with the method of the present invention.

[0039] The modified attapulgite was used as the adsorbent, which was installed in a quartz tube with a diameter of 8 mm, and the coking benzene solution with a nitrogen content of 1.0 mg / kg passed through the adsorption column under different conditions. See Table 3 for the treatment conditions and the nitrogen content in the coking benzene solution after treatment. The coking benzene solution contains basic nitrogen compounds such as N-formylmorpholine, morpholine, N-methylmorpholine, N-ethylmorpholine, pyridine, quinoline, isoquinoline and non-alkali compounds such as indole and pyrrole. Sexual nitrides.

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PUM

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Abstract

The invention discloses a method for refining coking benzene products containing nitrogen impurities. The method comprises the step of passing a benzene-type product which has the nitride content less than or equal to 10 mg / kg and contains nitrogen impurities through modified attapulgite adsorbent at the temperature between 15 DEG C and the boiling point of the benzene-type product containing nitrogen impurities at a linear velocity of 1.0 to 20.0 m / h. The modified attapulgite adsorbent is good in the performance of adsorbing nitride, can reduce the nitride content of coking benzene from 1.0 mg / kg to below 0.5 mg / kg, and can reduce the nitride content of coking toluene from 5.0 mg / kg to below 0.5 mg / kg.

Description

technical field [0001] The invention relates to a method for refining organic matter, in particular to a method for refining coking benzene products, in particular to a method for refining coking benzene products containing nitrogen impurities. Background technique [0002] In recent years, with the soaring price of international oil, the price of petroleum benzene products, the downstream products of petroleum, has also been soaring. In addition to petroleum benzene, benzene products also have coking benzene products. my country's coking benzene products are produced by introducing foreign advanced Litol and K-K crude benzene hydrogenation technologies, and their prices are far lower than petroleum benzene products. products, and the quality is basically close to that of petroleum benzene products, except that the content of nitrogen, moisture and olefins in coking benzene is higher than that of petroleum benzene products. Therefore, in order to cope with the increasing oil...

Claims

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Application Information

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IPC IPC(8): C07C7/12C07C15/02
Inventor 刘晓勤袁康入刘定华顾镇钧马正飞薛璋朱志敏徐娅
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD