Efficient Deoxidizer

Product name: Efficient deoxidizer (BASF Puristar R3-11G)

Efficient deoxidizer is a high-efficiency deoxidizer with copper oxide as the main active component and manganese oxide as an auxiliary agent.

In the fields of materials, electronics, chemical industry, etc., the presence of trace oxygen is often harmful. Oxygen can poison some polymerization catalysts. The presence of oxygen can make certain gases flammable and explosive, which can cause problems in production operations.

Transmission causes great safety hazards, etc. In addition, with the rapid development of science, technology and industrial production, which has also put forward higher requirements for product quality. For example, in the gas purification system of new materials and electronics industrial production lines, O₂ is removed from industrial electrolytic hydrogen and air separation nitrogen, and generator gas is deoxidized to produce "enriched gas", which is used as a protective gas for the production and processing of special steel. Deoxygenation of gases used for heat treatment and high-purity gases required for scientific research all put forward high requirements on the oxygen in the raw gas.

Efficient deoxidizer can effectively remove trace oxygen from gaseous and liquid hydrocarbons at low temperatures. It is widely used in ethylene, Deep removal of trace oxygen in propylene, nitrogen, hydrogen, CO₂ and methane removal. After deoxidation, the oxygen content in the raw gas can be reduced to less than 0.1ppm.

Efficient deoxidizer has some application:

1) Recycling and Utilization of Industrial Exhaust Gas

The exhaust gas emitted from industrial production contains a large number of valuable components, but due to the presence of O₂.

Now, it is easy to explode, causing technical problems for recycling. For example, in the chlorohydrin production process of propylene oxide, the exhaust gas contains about 50% propylene and propane, etc., with considerable recovery value. Deoxidizer can effectively remove residual oxygen in propylene and propane.

2) High purity gas and protective gas preparation

High-purity nitrogen requires the oxygen content in the gas to be less than 5 ppm, and the production of high-purity nitrogen from common nitrogen requires deoxygenation.

Under the action of deoxidizer, the oxygen content in high-purity nitrogen can be less than 0.1ppm. In terms of protective gas preparation, especially in shipping areas such as very large scale integrated circuits, laser materials, optical fibers and aerospace materials, the production process is required to be carried out in an ultra-clean environment system. For example, the semiconductor manufacturing process requires reducing the oxygen in the gas to 1 ppm or even lower, which requires Please use a suitable deoxidizer to remove oxygen to meet the requirements.

3) Syngas deoxygenation

The oxygen in the syngas reacts with the carbonylation product to form an acid that inhibits the carbonylation reaction. And oxidize the cocatalyst to form a non-catalytic complex, reducing the reaction effect. Ruding In the production process of octanol, in order to remove carbonyl iron and nickel carbonyl, artificial preparation is required in the front section. A certain amount of oxygen, but residual excess oxygen can easily lead to propylcarbonylation of precious metals in subsequent stages Catalyst deactivation. In order to protect the expensive precious metal catalyst, the oxygen content in the synthesis tower is required to be controlled below 1ppm, which requires deoxidation equipment to be installed in front of the synthesis tower.

4) Propylene deoxygenation and refining

Petrochemical polyethylene and polypropylene production requires oxygen content in the gas to be less than 0.1ppm.

Because trace amounts of oxygen will react with the catalyst, the catalyst activity will decrease. At the same time, it reacts with substances in the reaction system to generate resinous substances, which blocks the catalyst pores and pipes. Deoxidizers for olefinrefining require that side reactions such as olefin hydrogenation and oxidation cannot occur, which requires higher performance deoxidizers agent.

1) Catalyst filling and precautions

Before filling, clean the reactor and perform an air tightness test on the reactor. On the basis of ensuring that the height-to-diameter ratio of the loading layer is ≥3:1, it is recommended that: Relevant personnel must wear dustproof masks when loading, and the free fall height of the catalyst should be less than 0.5 meters. If the loading height more than 1 meter, it is recommended to first put the catalyst into a bottomless cloth bag and then send it into the reactor. The catalyst filling must be tight and even without channeling to ensure air flow and temperature distribution. Uniform and uniform bed resistance. After filling, clean air must be used to purge from the bottom of the reactor to remove the filling Powder is blown out due to impact and friction during the process.

2) Catalyst maintenance and storage

Frequent startup and shutdown will damage the life of the catalyst, so we should strive to avoid unnecessary shutdown; Reduce sulfur, chlorine, oil and other impurities in the raw gas as much as possible.

3) Replacement of deoxidizer

When the deoxidizer reaches the end of its service life, it needs to be replaced. When replacing, nitrogen should be used first.

Use gas or inert gas to replace the material in the bed, and then use nitrogen to add a certain amount of air to purge the bed, and gradually increase the amount of air until When all the added gas is air, the deoxidizer can be removed and replaced.

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