Please, experts: DMAC is used for the separation of acetic acid, but there is a material imbalance – help to solve this! ! !
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In spandex production, the DMAC purification tower: Feed rate: 23,600 kg/h; acetic acid content: 0.6%, with reconstituted components accounting for about 0.1%; DMAC content: 99.3%. Top product output: 1,000 kg, mostly DMAC. Product stream at the middle of the tower: 18,200 kg/h, mostly DMAC. Bottom product output: 4,400 kg/h, containing DMAC, acetic acid, and reconstituted components. Based on material balance calculations, the acetic acid content at the bottom of the tower should be around 3.22%. But! But! The laboratory test result was only 2.4%. The KOH titration method – it’s such a simple titration technique; I can’t see what could be wrong with it :( I’m completely stuck:Q Please help, I need a solution.
Titration is not very accurate; analyze the specific components
It is normal for the detection values to decrease when amino acids react to form salts.