A kind of wet method vanadium catalyst and preparation method thereof

Abstract

The invention discloses a wet-method vanadium catalyst and a preparation method thereof. The wet-method vanadium catalyst comprises the following raw material components: 3-5% of V2O5, 1-3% of thiosulfate, 1-5% of a caesium-containing compound, 1-3% of a surfactant, 2-5% of an organic high polymer compound, 1-3% of hydroxide, 5-10% of diluted acid, 0.1-1% of anhydrous sodium sulfate, 3-10% of phosphate, 0.1-2% of a nickel-containing compound, 1-3% of sulfur, 20-36% of concentrated sulfuric acid and the balance of kieselguhr crude ore, wherein the mass of the concentrated sulfuric acid is 0.9-1.1 times of the mass of kieselguhr crude ore; the mass sum of all raw material components is 100%; the mass concentration of the diluted sulfuric acid is 20-60%; the mass concentration of the concentrated sulfuric acid is not less than 80%; the surfactant is sodium dodecyl benzene sulfonate; the organic high polymer compound is polyacrylamide. The wet-method vanadium catalyst disclosed by the invention is low in initiation temperature and is solid and fast, and the anti-powdering properties and the water resistance of the wet-method vanadium catalyst are remarkably improved.

Description

technical field [0001] The invention relates to a wet-process vanadium catalyst and a preparation method thereof, belonging to the field of vanadium catalysts. Background technique [0002] During the production of sulfuric acid, it is necessary to add a catalyst to make SO 2 converted to SO 3 , This catalyst is generally a vanadium catalyst. During the use of the vanadium catalyst, local pulverization will gradually occur with high temperature. The pulverized catalyst will reduce the conversion rate of the catalyst, which will affect the system output and total sulfur utilization rate. At the same time, it may block the pipeline and cause conversion. The pressure inside the device increases, thereby greatly reducing the yield. [0003] In addition, the catalytic oxidation of sulfur dioxide is carried out under the condition of containing a large amount of water vapor. The use of ordinary catalysts cannot meet the wet process, and the traditional vanadium-silicon catalyst...

AI Technical Summary

Problems solved by technology

During the use of the vanadium catalyst, local pulverization will gradually occur with high temperature. The pulverized catalyst will reduce the conversion rate of the catalyst, which will affect the system output and total sulfur utilization rate. At the same time, it may block the pipeline and cause conversion. The pressure inside the device increases, which greatly reduces the yield

[0003] In addition, the catalytic oxidation of sulfur dioxide is carried out under the condition of containing a large amount of water vapor. The use of ordinary catalysts cannot meet the wet process, and the traditional vanadium-silicon catalysts will also be severely pulverized, and it will cause pressure after a period of use. drop up