Material selection for organic acid hydrochlorides during centrifugation and drying processes
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While recently looking into data on the corrosion caused by hydrochloric acid and chloride ions, I had an idea: what about the corrosivity if it were organic hydrochlorides? In general references, there is plenty of comprehensive information regarding the corrosiveness of hydrochloric acid and chloride ions in aqueous solutions. However, in many fine chemical productions, situations often arise where hydrochloric acid or chloride ions are present in organic solvents. Additionally, there are numerous organic hydrochloride products or intermediates, such as triethylamine hydrochloride. To elaborate on this, I would like to ask everyone how to make a proper choice of materials in the following situations: 1. How can we determine the corrosivity of chlorinated organic compounds in aqueous solutions? How is its corrosivity to materials such as stainless steel affected? 2. What is the corrosivity of chlorinated organic compounds in organic solvents? What is the effect on the properties of the solvent, such as polarity and non-polarity, protic and aprotic characteristics, etc.? 3. How can the corrosivity of organic hydrochlorides, such as triethylamine hydrochloride, to materials like stainless steel in aqueous or organic solutions be determined? 4. Furthermore, what types of corrosion may occur during the centrifugation process of organic hydrochlorides, such as triethylamine hydrochloride, in aqueous solutions or organic solvents? 5. Furthermore, what problems arise when the aforementioned organic acid hydrochloride is dried after separation? The aforementioned issues may be quite broad; here are two examples that might not be appropriate: 1. Triethylamine hydrochloride has very low solubility in toluene. What type of corrosion will occur to stainless steel during the process of centrifugally separating triethylamine hydrochloride from toluene when there is a small amount of water present? 2. Acidic/basic catalyst particles are prepared by adsorbing acids/bases onto a certain catalyst carrier, such as HCl/NaOH. After adsorption, desolvation and drying are carried out to remove the solvents containing small amounts of acid/base from the surface and within the pores of the carrier. How should corrosion be analyzed during this process? I hope that all experts and forum members will not hesitate to offer their guidance and actively engage in discussions :lol:lol:lol
1. The corrosivity of chlorinated organic compounds in aqueous solutions can be determined through experiments. The corrosivity of materials such as stainless steel is influenced by factors such as their composition and surface treatment methods; the appropriate choice must be made based on the actual conditions. 2. The corrosivity of chlorinated organic compounds in organic solvents also needs to be evaluated through experiments, with properties such as the polarity and protonicity of the solvent affecting their corrosivity. For example, chlorinated organic compounds in polar solvents may be more likely to cause corrosion. 3. The corrosivity of organic acid hydrochlorides also needs to be evaluated through experiments, and it may vary depending on the influence of different solvent environments. 4. During the centrifugal separation of organic hydrochlorides, if materials that are not resistant to corrosion, such as stainless steel, are used, local corrosion may occur. Therefore, it is necessary to choose materials with good corrosion resistance for centrifugal separation. 5. During the drying of organic hydrochlorides, if materials that are not resistant to corrosion are used for drying, it may lead to corrosion or contamination of those materials. Therefore, it is necessary to choose materials with good corrosion resistance and suitable for drying organic substances, such as glass or ceramic vessels. .