2-methylamine synthesis pictorial

8/9/2019 2-Methylamine Synthesis Pictorial

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This fle is a part o the Rhodium site archive. This Aug 2004 static snapshotis hosted by Erowid

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ethylamine rom Ammonium )hloride and *ormaldehyde

A +hoto,Essay

-T by Rhodium

any bees are ma$ing methylamine out o he&amine and -)l acid. % thin$ it/svery time consuming and -)l is pretty nasty. Thus % have ound that one caneasily ma$e lots o good uality methylamine rom ammonium chloride and

ormaldehyde 1 ormalin . 3nly drawbac$ with this method is that one musthave good uality ormaldehyde. %t may have para ormaldehyde sediment in

the bottom it doesn/t hurt not even a bit but *ormaldehyde has to be strongand not some diluted shit 5!,406 is fne.

7ow to the more,less oolproo method. % you do li$e said below you getaround 400,4!0 grams o pretty pure dimethylamine, ree methylaminehydrochloride which is per ect or Al8-g reductive aminations.

)hemicals needed9

::00g o Ammonium )hloride

2 liters o 5!,406 *ormaldehyde

about hal a litre o chloro orm
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The process

+our your ormaldehyde in a big round bottom ;as$ 1use at

least one o ! liter capacity along with ammonium chloride

and stir a bit. % used a :2 R# ;as$. 0=)(

At about ?0=) an e&othermic reaction $ic$s in 1it needs tobe cooled in a water bath once in a while at the beginning

in order to $eep temperature below :04,:0@=) .


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eep that temperature 5,4 hours or so then turn heat up and boil water away

until you see ammonium chloride coming out o solution. )ool to 20=) and

vacuum flter it oB on large #uchner unnel 1% have one with C 2! cm .

Dou should get a clear yellowish fltrate li$e in this picture.


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Trans er it to a smaller ;as$ and boil water away until you see

the internal temperature rise over :@0=) then turn on the vacuum andcontinue

frst temperature alls a ew tens o degrees and when it rises bac$ to about

:@0=) the methylamine is almost ree o water. Turn oB the vacuum and theheat.


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+our your crude methylamine hydrochloride in a bea$er. At frst it is still li uid

1in this picture it has started to solidi y you can still see some orange li uid

at the bottom o the bea$er .


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hen it has cooled down you/ll have a big chun$ o hard and drymethylamine.

ash it a ew times with chloro orm and you/ll end up with a ully white mush.


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Facuum flter to get pure and dry ethylamine.-)l which ree$s o chloro orm.

The smell can be removed by drying in a vacuum desiccator. Go not try touse

the oven to get rid o these traces o chloro orm the ethylamine.-)l pic$sup

water rom air li$e nothing. Dou can only use vacuum or sucess ul drying but

these )-)l5 traces don/t hurt the methylamine at all and may be le t in butyou

might perhaps be a per ectionist...


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*inal yield o snow white non,stic$y powder 1consisting o methylamine witha

ew percent ammonium chloride but and almost no dimethylamine

hydrochlorideeasily e&ceeds 400g i everything done correctly or even !00g i you used

406 ormaldehyde.

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2-methylamine synthesis pictorial

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