What is the reason why refined methanol only meets the qualified standards?
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A company’s methanol products currently only meet the acceptable standards; the product analysis data is as follows. Please analyze why the pure methanol also only meets these acceptable standards Project Actual Value Acceptance Criteria 1. Chroma: 8 ≤ 10 2. Density: 0.793 0.791–0.793 3. Potassium permanganate: 37 ≥ 50 min 4. Water solubility: 1+9 1+9 5. Moisture: 0.06% ≤ 0.20% 6. Acids: 0.0035 0.0050% 7. Glycosides: 0.007 0.010% 8. Evaporation residue: 0.004 0.005% 9. Sulfuric acid washing test: 10 ≤ 50 10. Boiling range: 0.79°C 1.5℃
Find the root cause comprehensively, from synthesis to the methanol distillation tower
Relevant information: 1) Water content in crude methanol: 24%, 2) pH: 4.5, 3) Catalyst has been in use for 30 months, 4) Inlet temperature of the catalyst bed: 280°C, peak temperature: 309°C, 5) Pressure: 8.0 MPa
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