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Preparation method and application of honeycomb type sulfur dioxide catalyst

A sulfur dioxide and catalyst technology, applied in the field of environmental purification, can solve the problems of increasing the overall operation process, cost and time of the process, and achieve the effects of low cost, simple operation and high strength

Inactive Publication Date: 2012-10-10
JIANGSU LONGYUAN CATALYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the use of mold molding increases the overall operation process, cost and time of the process, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mixing: Take 55 parts of diatomite, 10 parts of clay, 30 parts of vanadium pentoxide and 5 parts of silica sol, add them to the kneader, add 5 parts of water, stir and mix evenly at a speed of 400r / min;

[0021] (2) Mixing and extrusion: Mix the obtained solution in a vacuum mud mill for 3 times at a mixing temperature of 20-100°C; put the mixed mixture into a hydraulic extruder and extrude to obtain a honeycomb The primary product of sulfur dioxide catalyst, the extrusion pressure is 4Mpa;

[0022] (3) Drying and calcination: Dry the primary product of the honeycomb sulfur dioxide catalyst at 25-80 degrees for 240 hours, then program the temperature from room temperature in the muffle furnace, control the heating rate of 1 degrees / min, and keep it at 200 degrees for 4-6 hours. hours, then the heating rate is 1 degree / min, and the temperature is kept at 550 degrees for 4~6 hours to cool down to obtain the finished product. After calcining, the temperature is lowere...

Embodiment 2

[0024] (1) Mixing: Take 54 parts of diatomite, 7 parts of silica gel, 3 parts of montmorillonite, 32 parts of sodium bisulfate and 4 parts of glycerin, and add them to the kneader, then add 10 parts of water, at a speed of 500r / min Stir to mix well;

[0025] (2) Mixing and extrusion: Mix the obtained solution twice in a vacuum mud mill at a mixing temperature of 20-100°C; put the mixed mixture into a hydraulic extruder and extrude to obtain a honeycomb The primary product of sulfur dioxide catalyst, the extrusion pressure is 5Mpa;

[0026] (3) Drying and calcination: Dry the primary product of the honeycomb sulfur dioxide catalyst at 25-80 degrees for 240 hours, then program the temperature from room temperature in the muffle furnace, control the heating rate of 1 degrees / min, and keep it at 200 degrees for 4-6 hours. hours, then the heating rate is 1 degree / min, and the temperature is kept at 550 degrees for 4~6 hours; after calcining, the temperature is lowered to room temp...

Embodiment 3

[0028] (1) Mixing: Take 54 parts of diatomaceous earth, 12 parts of attapulgite, 32 parts of cesium sulfate and 4 parts of paraffin, add them to the kneader, add 15 parts of water, stir and mix at a speed of 1000r / min;

[0029] (2) Mixing and extrusion: Mix the obtained solution twice in a vacuum mud mill at a mixing temperature of 20-100°C; put the mixed mixture into a hydraulic extruder and extrude to obtain a honeycomb The primary product of sulfur dioxide catalyst, the extrusion pressure is 4Mpa;

[0030] (3) Drying and calcination: Dry the primary product of the honeycomb sulfur dioxide catalyst at 25-80 degrees for 240 hours, then program the temperature from room temperature in the muffle furnace, control the heating rate of 1 degrees / min, and keep it at 200 degrees for 4-6 hours. hours, then the heating rate is 1 degree / min, and the temperature is kept at 550 degrees for 4~6 hours; after calcining, the temperature is lowered to room temperature to obtain the product ho...

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PUM

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Abstract

The invention relates to a preparation method and application of a honeycomb type sulfur dioxide catalyst, particularly relates to a honeycomb type catalyst for oxidizing sulfur dioxide into sulfur trioxide and a preparation method of the honeycomb type catalyst, and belongs to the technical field of environmental purification. Silicon oxide or another substance such as silicon-aluminum oxide is used as a carrier, and a product is formed after active components and forming auxiliaries are added into the carrier and is dried and calcined to prepare the honeycomb type sulfur dioxide catalyst. The honeycomb type sulfur dioxide catalyst is prepared by the mixing preparation method, and the method includes dissolving the active components or dissolving the active components and cocatalyst compositions to obtain liquor; and mixing, kneading, ageing, drying and calcining the liquor, the carrier and the forming auxiliaries to form the catalyst. The catalyst has the advantages of wide application range, low cost, high strength, simplicity and feasibility in operation, and the like, and is applicable to industrial production. In addition, the honeycomb type sulfur dioxide catalyst can be widely used for oxidizing sulfur dioxide into sulfur trioxide and treating sulfur dioxide generated in various combustion processes and contained in industrial waste gas.

Description

technical field [0001] The invention relates to a preparation method and application of a honeycomb sulfur dioxide catalyst, in particular to a honeycomb catalyst for oxidizing sulfur dioxide into sulfur trioxide and a preparation method thereof, belonging to the technical field of environmental purification. Background technique [0002] At present, the sulfuric acid industry and other sulfur-related industries usually use cylindrical or daisy-shaped catalysts. Catalysts are scattered in the reactor, resulting in channel flow, wall flow, and large pressure drop of the fluid in the reaction bed, reducing catalyst activity and shortening service life. [0003] Chinese patent CN10185026A has prepared a vanadium catalyst containing diatomite, vanadium pentoxide, potassium sulfate, etc. by direct mixing and rolling, and is used for SO 2 oxidation reaction. [0004] Chinese patent ZL91103089.1 uses titanium dioxide as a carrier, vanadium oxide, alkali metal oxide, etc. as subst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055B01J32/00B01J35/04B01J37/00B01D53/86B01D53/50
CPCY02A50/20
Inventor 张涛汪德志肖雨亭
Owner JIANGSU LONGYUAN CATALYST CO LTD
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