my first trial run of making l-pac, here is my recipe not sure if it's all correct but i'll give it a go anyway.
2.5 ltrs of h2o
87.50 gms of molasses
yeast and nutrient
20ml of benzaldehyde
75ml of ether
in to a 5ltr demijohn goes 2.5ltrs of h2o and 87.50 gms of molasses,
saturate wash with pure oxygen,
add yeast and nutrient and allow to ferment for 8hrs or so,
once wash is rapidly fermenting add 10ml of benzaldehyde ,
after 4hrs or so add another 10ml of benzaldehyde and allow to ferment for another 12hrs or more,
once finished remove yeast,
extract l-pac with 50ml of ether and then 25ml of ether,
combine ether and distill
collect l-pac?
theoretical yield 10ml is 50% conversion.
feedback is appreciated and i'll post my results once done.
2.5 ltrs of h2o
87.50 gms of molasses
yeast and nutrient
20ml of benzaldehyde
75ml of ether
in to a 5ltr demijohn goes 2.5ltrs of h2o and 87.50 gms of molasses,
saturate wash with pure oxygen,
add yeast and nutrient and allow to ferment for 8hrs or so,
once wash is rapidly fermenting add 10ml of benzaldehyde ,
after 4hrs or so add another 10ml of benzaldehyde and allow to ferment for another 12hrs or more,
once finished remove yeast,
extract l-pac with 50ml of ether and then 25ml of ether,
combine ether and distill
collect l-pac?
theoretical yield 10ml is 50% conversion.
feedback is appreciated and i'll post my results once done.
- Joined
- Feb 22, 2023
- Messages
- 295
- Reaction score
- 243
- Points
- 43
It seems not to be understood that this is a condensation reaction of two aldehydes. Benzaldehyde and - what? So Acetaldehyde is added and there is your second one. Or Acetone in the Austrian Patent which Uncle Fester sold (it does not really work like most of his stuff). Or Pyruvate is added this is a energy source for the yeast and forms Acetaldehyde in the process.
So, if you do this without a second Aldehyde or a precursor of it then TWO Benzaldehyde will be needed as Benzaldehyde + Benzaldehyde works too but of course maximum yield counted from Benzaldehyde is reduced to half.
And Dextrose and Frucose can provide energy but no Aldehyde to the reaction.
So, if you do this without a second Aldehyde or a precursor of it then TWO Benzaldehyde will be needed as Benzaldehyde + Benzaldehyde works too but of course maximum yield counted from Benzaldehyde is reduced to half.
And Dextrose and Frucose can provide energy but no Aldehyde to the reaction.
↑View previous replies…
- Joined
- Feb 22, 2023
- Messages
- 295
- Reaction score
- 243
- Points
- 43
Sodium Pyruvate is the gold standard. Calcium Pyruvate works too. Problem is you need a frigging lot of it so for serious production Acetaldehyde is better suited. If you can buy Paraldehyde - thats perfect, easily de-polymerized to Acetaldehyde and far better to handle.
With Acetaldehyde you need to add a energy source like sucrose or dextrose though.
The trick with pyruvate is that it does not need the yeast fermenting.
With Acetaldehyde you need to add a energy source like sucrose or dextrose though.
The trick with pyruvate is that it does not need the yeast fermenting.