Is a glass-lined reactor resistant to alkalis?
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At around 70°C, how high a concentration of methanol-sodium hydroxide solution can a glass-lined reactor withstand without being corroded?
It depends on what the pH value is, after all, the main component of glass-lined steel is SiO2. The alkali-resistant components of each glaze powder are different.
Can it be used with a sodium hydroxide concentration of nearly 20%?
The concentration of sodium hydroxide is approaching 20%; I see that many suggestions relate to pH
The sodium hydroxide concentration is close to 20%
The pH value is high. It is recommended to use PTFE lining, or apply it by spraying/coating (PFA/F40)
The pH is already at 12; it’s better to use PTFE lining. I’ve seen cases where enamel was used at a pH of around 9