Method for preparing dimethyl sulfide by utilizing refinery acid gas

A technology of dimethyl sulfide and acid gas, which is applied in the preparation of sulfide, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of excessive acid gas in refineries, and achieves simplified tail gas treatment steps and high selectivity. the effect of reducing environmental pollution

Inactive Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for directly using refinery acid gas to prepare sulfur-containing high value-added product dimethyl sulfide, which solves the problem of excessive acid gas in the refinery and can reduce the operating cost of the device; The hydrogen sulfide in the hydrogen can achieve a higher conversion rate, which can reduce environmental pollution and simplify the subsequent tail gas treatment steps, and at the same time obtain a higher selectivity of dimethyl sulfide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example is used to illustrate the method for preparing dimethyl sulfide by using refinery acid gas of the present invention.

[0041] Taking HZSM-5 as the active phase, alumina as the carrier, and pseudoboehmite as the binder to prepare the catalyst, the silicon-aluminum ratio of HZSM-5 is 35.5, and the sodium oxide content is 0.03% by weight, based on the total amount of the catalyst As a benchmark, the molecular sieve weight content is 80%. Add 100g of HZSM-5 molecular sieve into deionized water, ultrasonically disperse for 50min, then add 20g of pseudo-boehmite and 5g of alumina to the slurry, and continue ultrasonically dispersing for 40min. The mixed slurry was suction filtered, and the obtained filter cake was dried in a vacuum oven at a temperature of 40°C. Put the dried filter cake into extruder, knead with nitric acid aqueous solution to form a ball, and extrude to form. The catalyst is cylindrical with a diameter of 2mm. Place the molded catalyst in the...

Embodiment 2

[0045] This example is used to illustrate the method for preparing dimethyl sulfide by using refinery acid gas of the present invention.

[0046] Taking HZSM-5 as the active phase, kaolin as the carrier, and pseudoboehmite as the binder to prepare the catalyst, the silicon-aluminum ratio of HZSM-5 is 29.8, and the sodium oxide content is 0.02% by weight. The total amount of the catalyst is As a benchmark, the molecular sieve weight content is 70%. Add 100g of HZSM-5 molecular sieve into deionized water, ultrasonically disperse for 60min, then add 30g of pseudo-boehmite and 12.8g of kaolin to the slurry, and continue ultrasonically for 30min. The mixed slurry was suction filtered, and the obtained filter cake was dried in a vacuum oven at a temperature of 40°C. Put the dried filter cake into extruder, knead with nitric acid aqueous solution to form a ball, and extrude to form. The catalyst is cylindrical with a diameter of 2 mm. Put the molded catalyst in the reaction tube, a...

Embodiment 3

[0050] This example is used to illustrate the method for preparing dimethyl sulfide by using refinery acid gas of the present invention.

[0051] With HZSM-5 as the active phase, pseudo-boehmite and alumina sol are used as the binding agent to prepare the catalyst. The silicon-aluminum ratio of HZSM-5 is 51.7, and the sodium oxide content is 0.02% by weight. Based on the total amount of the catalyst, Molecular sieve weight content is 90%. Add 100g of HZSM-5 molecular sieve into deionized water, ultrasonically disperse for 50 minutes, then add 10g of pseudo-boehmite to the slurry, and continue ultrasonically dispersing for 40 minutes. The mixed slurry was suction filtered, and the obtained filter cake was dried in a vacuum oven at a temperature of 45°C. Put the dried filter cake into extruder, add 5.5g of aluminum sol, knead with nitric acid aqueous solution to form a ball, and extrude to shape. The catalyst is cylindrical with a diameter of 2mm. Put the molded catalyst in th...

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Abstract

The invention discloses a method for preparing dimethyl sulfide from refinery acidic gas. The method comprises the following steps: making refinery acidic gas containing hydrogen sulfide contact an acidic medium, and contacting with methanol in the presence of a catalyst containing an MFI structure molecular sieve to obtain a mixture containing dimethyl sulfide. The method provided by the invention is simple and feasible, is beneficial to industrial production, solves the problem of excessive acid gas in a refinery plant, can reduce the operation cost of the device, and can effectively improvethe conversion rate of hydrogen sulfide and the selectivity of dimethyl sulfide.

Description

technical field [0001] The invention relates to a method for utilizing acid gas in a refinery, in particular to a method for preparing dimethyl sulfide from acid gas in a refinery. Background technique [0002] Hydrogen sulfide is one of the most important sulfur resources in the world, mainly produced in natural gas desulfurization and petroleum processing. Refinery acid gas mainly comes from the processes of acid water stripping, dry gas desulfurization, liquefied gas desulfurization, and hydrogenation. Its main component is hydrogen sulfide, and it also contains a small amount of carbon dioxide, methane, ammonia, and water vapor. my country's demand for petroleum resources is growing rapidly, and it is necessary to import a large amount of high-sulfur crude oil. The heavy and inferior crude oil causes a large amount of refinery acid gas due to petroleum processing. Hydrogen sulfide gas in refinery acid gas is highly toxic, flammable and explosive, and cannot be discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/14C07C321/14B01J29/40B01J37/10
CPCB01J29/40B01J37/10C07C319/14C07C321/14
Inventor 关莉莉汪颖慕旭宏舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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