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The biodiesel-based flat-rheology drilling fluid system
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JIANG Guancheng,SHI He,HE Yinbo
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Table 2 Optimal reaction condition, yield and cost of biodiesel prepared with different raw alcohols
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| Alcohol | Alcohol-oil ratio | Catalyst | Catalyst addition/% | Temperature/°C | Time/h | Yield/% | Cost/(RMB·t-1) | | Methanol | 5:1 | NaOH | 1 | 50 | 0.5 | 96 | 3400 | | Ethanol | 6:1 | NaOH | 1 | 65 | 1.0 | 92 | 5200 | | Propanol | 10:1 | NaOH | 2 | 90 | 2.0 | 44 | 15 000 | | Isopropanol | 12:1 | Enriched H2SO4 | 5 | 80 | 5.0 | 27 | 17 000 |
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