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Method for selectively desorbing carbon disulfide in coarse benzene

A carbon disulfide and selective technology, applied in the field of coal chemical industry, can solve the problems of non-recyclable carbon disulfide, high energy consumption, cumbersome process, etc., and achieve the effects of high selective adsorption and removal rate, mild adsorption operation conditions, and simplified operation process.

Active Publication Date: 2012-10-10
邢台旭阳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method is cumbersome, and the energy consumption is relatively high, and carbon disulfide cannot be recycled.
[0005] So far, there has been no report on the use of silica-alumina molecular sieves as an adsorbent for adsorption and removal of carbon disulfide in crude benzene

Method used

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  • Method for selectively desorbing carbon disulfide in coarse benzene
  • Method for selectively desorbing carbon disulfide in coarse benzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Removal of carbon disulfide:

[0018] Dissolve carbon disulfide in pure benzene to make simulated crude benzene, so that the concentration of carbon disulfide in simulated crude benzene is 3000mg / kg. 200g of 5A-type silica-alumina molecular sieve (Nankai University Catalyst Factory) was fixed in the adsorber, under normal temperature and pressure, the space velocity ratio was 0.7h -1 , into simulated crude benzene, the reaction result is that the adsorption and removal rate of carbon disulfide is 100%.

[0019] Recovery of carbon disulfide:

[0020] After the 5A-type silica-alumina molecular sieve adsorbent is saturated, the N 2 Purge, heat up to 300°C within 2 hours, maintain 300°C for 3 hours to purify for the first regeneration, and record the 5A-type silica-alumina molecular sieve after the first regeneration as sample I. N after purge 2 After being condensed by the condenser, the carbon disulfide in it is condensed and recovered, and the condensate is recorded ...

Embodiment 2

[0023] Removal of carbon disulfide:

[0024] Dissolve carbon disulfide in pure benzene to make simulated crude benzene, so that the concentration of carbon disulfide in simulated crude benzene is 3000mg / kg. Fix 200g of sodium Y-type silica-alumina molecular sieve (Nankai University Catalyst Factory) in the adsorber, under normal temperature and pressure, the space velocity ratio is 0.7h -1 , into simulated crude benzene, the reaction result is that the adsorption and removal rate of carbon disulfide is 100%.

[0025] Recovery of carbon disulfide:

[0026] After the sodium Y-type silica-alumina molecular sieve adsorbent is saturated, N 2 Purge, heat up to 300°C within 2 hours, maintain 300°C for 3 hours to purify for the first regeneration, and record the sodium Y-type silica-alumina molecular sieve after the first regeneration as sample III. N after purge 2 After being condensed by the condenser, the carbon disulfide in it is condensed and recovered, and the condensate is ...

Embodiment 3

[0029] Removal of carbon disulfide:

[0030] Dissolve carbon disulfide in pure benzene to make simulated crude benzene, so that the concentration of carbon disulfide in simulated crude benzene is 3000mg / kg. 200g of 13X type 13X silica-alumina molecular sieve (Nankai University Catalyst Factory) was fixed in the adsorber, under normal temperature and pressure, the space velocity ratio was 0.7h -1 , into simulated crude benzene, the reaction result is that the adsorption and removal rate of carbon disulfide is 100%.

[0031] Recovery of carbon disulfide:

[0032] After the 13X-type silica-alumina molecular sieve adsorbent is saturated, N 2 Purge, heat up to 300°C within 2 hours, maintain 300°C for 3 hours to purify for the first regeneration, and record the 13X-type silica-alumina molecular sieve after the first regeneration as sample VI. N after purge 2 After being condensed by the condenser, the carbon disulfide in it is condensed and recovered, and the condensate is recor...

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Abstract

The invention discloses a method for selectively desorbing carbon disulfide in coarse benzene. The nethod comprises the steps that a silicon-alumininm molecular sieve is utilized as adsorbent; at the temperature of 10-60DEG C, carbon disulfide in the coarse benzene is subjected to efficient selective adsorption under the normal-pressure condition; in addition, after adsorbent is adsorbed to be saturated, N2 is introduced in at the temperature of 200-400DEG C, and is purged for 2-6 hours, so the adsorbent can be regenerated and reused; and meanwhile, the adsorbed and desorbed carbon disulfide can be desorbed and reused. The method for selectively desorbing carbon disulfide in the coarse benzene has the advantages of moderate adsorption condition, simple equipment, easiness in operation, high selective adsorption and the like, and the adsorbent can be reused after being regenerated.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and relates to the impurity removal of crude benzene recovered from coke oven gas. More specifically, the invention provides a method for selectively adsorbing and removing carbon disulfide in crude benzene by using silicon-aluminum molecular sieves. Background technique [0002] Carbon disulfide, as an organic sulfur impurity contained in crude benzene, has a mass fraction of about 0.3-0.4%. It will corrode equipment and pollute the environment due to its slow hydrolysis during the production and transformation of chemical products, and it will also cause poisoning of some industrial catalysts and affect industrial production. In the crude benzene refining process of the coking plant, carbon disulfide in the crude benzene is firstly removed, which can improve the organic sulfur hydrogenation treatment capacity in the crude benzene refining process, thereby increasing the output and...

Claims

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Application Information

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IPC IPC(8): C07C15/04C07C7/13C01B31/26C01B32/72
Inventor 张英伟刘小晨孙长江王耀红魏小林乔红琴
Owner 邢台旭阳科技有限公司
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