T/NPCA 05-2024 The by-product of the methyltriacetic acid produced by ester exchange method is crude sodium bicarbonate salt

Scope

Scope: This document specifies the requirements, test methods, inspection rules, marking, and accompanying documents, as well as packaging, transportation, and storage for crude sodium carbonate salt produced as a by-product of dimethyl carbonate synthesis by the ester exchange method. This document applies to crude sodium carbonate salt obtained as a by-product of dimethyl carbonate production using propylene oxide or ethylene oxide as raw materials by the ester exchange method. This product is mainly used as a slurrying agent in the water-coal slurry process and a carbon source additive in wastewater treatment, and can also be used in building materials such as clay and cement. Main technical content: Item Indicator (Type I/Type II) 1 Appearance Gray-white to gray powder or lump / White to light yellow powder or lump 2 Total alkali content (calculated as Na2CO3, on a wet basis), ω/% ≥ 40.0 3 Moisture, ω/% ≤ 20.0 4 1,2-propanediol, ω/% ≤ 40.0 (Type I) / / (Type II) 5 Ethylene glycol, ω/% / (Type I) / ≤ 40.0 (Type II) Type I refers to the product obtained using propylene oxide as a raw material, and Type II refers to the product obtained using ethylene oxide as a raw material.

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