Anhydrous sodium methylate

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This page gives a guide to making Biodiesel from Anhydrous Sodium Methylate (ASM), a liquid catalyst which can be used in place of the more conventional Sodium Hydroxide or Potassium Hydroxide catalysts.

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What is Anhydrous Sodium Methylate

It is a white powder in pure form but for practical use in diy biodiesel it is dissolved in pure methanol at 28% to 30% concentration. 28% ASM in Methanol is a colourless, viscous fluid with a slighlty sweet alcohol smell - very similar to mehanol which, after all, makes up a large proportion of the fluid volume. ASM is both highly flammable and corrosive. It evaporates readily to leave a white powdery residue and at low temperatures it tends to precipitate out the white solid.

Availability

Compared to Sodium Hydroxide and Potassium Hydroxide which are readily available from a number of chemical suppliers around the UK, ASM is somewhat harder to source. At the time of writing, the only company readily supplying ASM to DIY producers is Trinity Research who supply it in 25L HDPE containers, 60L drums, 200L drums and IBCs.

Making biodiesel with Anhydrous Sodium Methylate

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Calculating how much to use

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Mixing

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