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Preparation method of SO2 oxidizing reaction catalyst

A technology of oxidation reaction and catalyst, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, etc., can solve the problem of increasing production cost and safety cost, time-consuming, production process Many problems, to achieve excellent SO2 oxidation reaction catalytic performance, save construction investment, shorten the effect of the production process

Active Publication Date: 2010-10-06
吉林省临江天元催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The use of sulfuric acid not only pollutes the environment, but is also easy to leak and cause personal injury
[0017] 2. Many production processes, time-consuming and high cost
[0018] The above-mentioned vanadium catalyst production process diatomite pretreatment process, vanadium and neutralization process all take a long time, so while time-consuming, it also increases production costs and safety costs
[0019] In the 1980s, Chinese R&D personnel began to study the use of diatomite from Changbai Mountain in Northeast my country (referred to as Northeast soil) as the carrier of vanadium catalyst. 2 At about 86.0%, iron oxide and aluminum oxide can reach ≤1.5% and ≤3.5% respectively, and acid treatment is no longer needed. However, due to the structural differences between northeast soil and Shandong soil, all use northeast diatomite as vanadium The strength of the vanadium catalyst product produced by the catalyst carrier cannot meet the index requirements

Method used

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  • Preparation method of SO2 oxidizing reaction catalyst
  • Preparation method of SO2 oxidizing reaction catalyst
  • Preparation method of SO2 oxidizing reaction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1. The impact of rolling time on strength

[0065] Add 200 kilograms of northeast diatomite in the roller and press the proportioning (V 2 o 5 : 7.5-8.5%; K 2 SO 4 : 22-32%; diatomaceous earth: 60.5-69.5%) by adding V 2 o 5 , potassium sulfate and an appropriate amount of water for rolling, rolling to 20, 30, 40, 50, 60, 80, and 100 minutes respectively, taking out the rolling material and extruding and extruding the ring with a double-screw extruder (strip cylinder) the diameter is The length is 6 ~ 15mm; the outer diameter of the hollow circular cylinder the inside diameter of The length is 10-15mm), and the extruded strips and rings are dried in an oven at 120°C for 4 hours, and then baked in a high-temperature furnace at 600°C for 2 hours.

[0066] According to the requirements of the chemical industry standard of the People's Republic of China of HG2086-2004, take out 40 roasted bars and rings of each rolling time and carry out the measurement...

Embodiment 2

[0075] Embodiment 2. The impact of rolling time on activity

[0076] According to HG2086-2004, the chemical industry standard of the People's Republic of China, the activity test method of vanadium catalysts was used to measure the activity of the samples with different rolling time, and the results are shown in Table 8.

[0077] Table 6: Viability Assay Data

[0078] Rolling time

[0079] It can be seen from the data in Table 6 that the difference in rolling time has no great influence on the activity of the samples.

Embodiment 3

[0080] Embodiment 3. Effect of firing temperature on strength

[0081] Add 100 kg of northeast diatomite into the roller and add V according to the ratio of S101 and S101-2H products 2 o 5 , potassium sulfate and an appropriate amount of water were rolled for 60 minutes, and the rolled material was extruded and ring-extruded with a double-screw extruder (the diameter of the strip cylinder is The length is 6 ~ 15mm; the outer diameter of the hollow circular cylinder the inside diameter of The length is 10-15 mm), and the extruded strips and rings are dried in an oven at 120° C. for 4 hours. The dried strips were respectively placed in a high-temperature furnace for calcination at 450°C, 500°C, 550°C, 600°C, 650°C, 700°C, and 750°C for 2 hours each. According to the requirements of the chemical industry standard of the People's Republic of China HG2086-2004, 40 strips and rings after each roasting were taken out to measure the radial crushing resistance of the particles o...

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Abstract

The invention provides a preparation method of a SO2 oxidizing reaction catalyst, comprising the following steps of: mixing diatomite, vanadium pentoxide and acid potassium sulfate according to a certain proportion and grinding; carrying out extrusion forming on the ground mixture; drying the product subjected to the extrusion forming; and calcining the dried product. The method provided by the invention shortens the production flow of a vanadium catalyst, saves the construction investment of a production line and the production cost of a product, and reduces the environmental pollution, and the produced product has favorable catalyzing activity.

Description

technical field [0001] The present invention relates to a kind of SO 2 The preparation method of oxidation reaction catalyst, more specifically relate to a kind of catalytic SO 2 Preparation method of vanadium catalyst for oxidation reaction. Background technique [0002] SO 2 Oxidation reaction with oxygen to produce SO 3 , SO 3 Absorbed by water to generate sulfuric acid; in addition, SO 3 It can also be used as raw material gas for sulfonation reaction, so SO 2 Oxidation reaction occupies a very important position in sulfuric acid industry and basic chemical industry. SO 2 Three solid catalysts have been used for the oxidation of α: iron catalyst, platinum catalyst and vanadium catalyst. The iron catalyst is cheap, and it needs to be replaced by Fe at 640°C 2 o 3 It is active only when the form exists, and the equilibrium conversion rate is very low above 640 °C. Thanks to SO 2 Oxidation reactions are strongly exothermic, so iron catalysts are not commonly use...

Claims

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Application Information

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IPC IPC(8): B01J27/055B01J23/22C01B17/79
Inventor 王富绩
Owner 吉林省临江天元催化剂有限公司
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