The selection of reaction kettle is crucial when dealing with strong alkaline liquids. The alkali corrosion resistance and applicable conditions of reaction vessels with different materials and structures vary. To help you quickly understand, I will first use a table to summarize the applicability of common reactor materials to strong alkaline solutions:

Material/type of reactor, strong alkali resistance, main limitations, typical application scenarios

Nickel and nickel composite plates are resistant to strong alkali but have a higher price; In sulfur-containing media, use concentrated alkali environment under temperature limited high temperature and high pressure (such as 50% NaOH)

Stainless steel, such as 316L stainless steel, is resistant to alkali corrosion. When exposed to high temperature concentrated alkali or chloride ions, attention should be paid to the material selection. It is widely used in alkaline environments

Glass (high borosilicate) is resistant to strong acids and alkalis but not to hydrofluoric acid; Laboratory or small-scale production that is not resistant to rapid cold and heat, does not have pressure, normal pressure, and mild temperature

Enamel (glass lining) - High temperature concentrated alkali solution can corrode the enamel glass layer. It is not recommended for use in high temperature concentrated alkali conditions

Carbon steel/stainless steel lined with tetrafluoroethylene tetrafluoroethylene (PTFE) is typically used for corrosion resistance at temperatures not exceeding 250 ℃; Damage to the lining layer may lead to corrosion in medium to low temperature and strongly corrosive environments

💡 Selection considerations and safe use

In addition to the selection of core materials, the following points also need special attention:

·Pay attention to specific working conditions: When selecting, it is necessary to clarify the specific concentration, operating temperature, pressure, and whether there are other corrosive components in the alkaline solution. For example, although stainless steel is alkali resistant, chloride ions in the medium may cause pitting or stress corrosion.

·Pay attention to equipment maintenance: Regularly inspect the reactor. Clean up promptly after each use and regularly inspect safety valves, pressure gauges, sealing systems, and other components.

·Strictly follow the operating procedures: closely monitor the temperature and pressure during the reaction process, and strictly prohibit overheating and overpressure operation.

💎 summary

Choose the reaction vessel for handling strong alkaline solution:

·High temperature and high pressure concentrated alkali process → Nickel material is a reliable choice.

·A general alkaline solution with relatively mild conditions → stainless steel (such as 316L) is an economical and widely used option.

·Laboratory or small-scale production under normal pressure → Glass reaction vessels are easy to observe, but it should be noted that they are not resistant to hydrofluoric acid and do not withstand pressure.

I hope the above information can help you make a suitable choice. If you could share more specific process parameters, such as alkali concentration, temperature, and pressure range, perhaps I could provide further advice.