Catalyst for preparation of dimethyl sulfide and method for synthesis of dimethyl sulfide

A technology of dimethyl sulfide and catalyst, which is applied in the field of preparing dimethyl sulfide catalyst and synthesizing dimethyl sulfide, can solve the problem of low methanol conversion rate, achieve good catalytic effect, stable skeleton structure, acid The effect of suitable amount and acid strength distribution

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conversion rate of methanol

Method used

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  • Catalyst for preparation of dimethyl sulfide and method for synthesis of dimethyl sulfide
  • Catalyst for preparation of dimethyl sulfide and method for synthesis of dimethyl sulfide
  • Catalyst for preparation of dimethyl sulfide and method for synthesis of dimethyl sulfide

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This example is used to illustrate the catalyst for preparing dimethyl sulfide of the present invention and its catalytic performance.

[0040] Taking HZSM-5 as the active phase, kaolin as the carrier, and pseudoboehmite as the binding agent to prepare the catalyst, the silicon-aluminum ratio of HZSM-5 is 26.8, 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 60 minutes, then add 30g of pseudo-boehmite and 12.8g of kaolin to the slurry, and continue ultrasonically dispersing for 30min. The mixed slurry was suction filtered, and the obtained filter cake was dried in a vacuum oven at a temperature of 50°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 cat...

Embodiment 2

[0043] This example is used to illustrate the catalyst for preparing dimethyl sulfide of the present invention and its catalytic performance.

[0044] Taking HZSM-5 as the active phase, alumina as the carrier, and pseudo-boehmite as the binder to prepare the catalyst, the silicon-aluminum ratio of HZSM-5 is 47.5, 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. Put the molded catalyst in...

Embodiment 3

[0047] This example is used to illustrate the catalyst for preparing dimethyl sulfide of the present invention and its catalytic performance.

[0048] 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 53.2, and the sodium oxide content is 0.05% 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 50°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. Place the molded catalys...

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Abstract

The invention relates to the field of catalytic materials, and discloses a catalyst for preparation of dimethyl sulfide and a method for synthesis of dimethyl sulfide. The catalyst comprises a molecular sieve; and the catalyst NH3-TPD is characterized by comprising the following characteristics: the desorbed amount of ammonia at 150 DEG C to 250 DEG C is no more than 0.125 mmol/g; the desorbed amount of ammonia at 450 DEG C to 550 DEG C is no more than 0.036 mmol/g; and the total desorbed amount of ammonia at 150 DEG C to 550 DEG C is no less than 0.237 mmol/g. By adoption of the catalyst provided by the invention, a reaction of hydrogen sulfide and methanol can be effectively catalyzed to perform; and the method provided by the invention can obtain higher dimethyl sulfide selectivity, andcan enable the methanol to achieve a higher conversion rate at the same time.

Description

technical field [0001] The invention relates to a catalyst for preparing dimethyl sulfide and a method for synthesizing dimethyl sulfide. Specifically, it relates to an acidic catalyst containing molecular sieves for preparing dimethyl sulfide and a method for synthesizing dimethyl sulfide using the catalyst. Background technique [0002] A large amount of hydrogen sulfide is produced during oil processing and exploitation of low-quality natural gas fields. At present, with the heavy and inferior quality of crude oil and the exploitation of more inferior natural gas fields, the amount of hydrogen sulfide resources from oil processing and natural gas field exploitation is gradually increasing. In the face of a large amount of hydrogen sulfide resources, how to use it is an important issue. [0003] The traditional way to utilize hydrogen sulfide is to selectively oxidize hydrogen sulfide to sulfur and water through the Claus process. However, the price of the product sulfu...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C319/14C07C321/04
CPCB01J29/40C07C319/14C07C321/04
Inventor 关莉莉汪颖慕旭宏舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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