Anyone got a good write up on this..
One hundred grams (125 cc., 1.7 moles) of n-propyl alcohol, b.p. 96–96.6°, is placed in a 2-l. three-necked, round-bottomed flask fitted with a mercury-sealed stirrer (Note 1), a dropping funnel, and a 60-cm. bulb condenser (Note 2) set at an angle of 45°. Water at 60° is kept circulating through this condenser. A condenser setfor downward distillation is connected to the top of the first condenser. Cold water circulates through the second condenser. By means of an adapter, the lower end of the second condenser is fitted to a receiver which is cooled with ice water.
The alcohol in the flask is heated to boiling, stirred, and a mixture of 164 g. (0.56 mole) of potassium dichromate, 120 cc. of concentrated sulfuric acid (2.2 moles), and 1 l. of water is added through the dropping funnel. The addition takes about thirty minutes, and during this time the contents of the flask are kept vigorously boiling. After all the oxidizing mixture has been added, the contents of the flask are boiled for fifteen minutes to distil the last of the aldehyde. The propionaldehyde which collects in the receiver is dried with 5 g. of anhydrous sodium sulfate and fractionally distilled. The yield of propionaldehyde boiling at 48–55°, and having a refractive index of 1.364 (Note 3), is 44–47 g. (45–49 per cent of the calculated amount).
The alcohol in the flask is heated to boiling, stirred, and a mixture of 164 g. (0.56 mole) of potassium dichromate, 120 cc. of concentrated sulfuric acid (2.2 moles), and 1 l. of water is added through the dropping funnel. The addition takes about thirty minutes, and during this time the contents of the flask are kept vigorously boiling. After all the oxidizing mixture has been added, the contents of the flask are boiled for fifteen minutes to distil the last of the aldehyde. The propionaldehyde which collects in the receiver is dried with 5 g. of anhydrous sodium sulfate and fractionally distilled. The yield of propionaldehyde boiling at 48–55°, and having a refractive index of 1.364 (Note 3), is 44–47 g. (45–49 per cent of the calculated amount).
@Frit Buchner lost on this one can’t buy it anywhere seems a bitch to synthesise and sack paying $100-180 1lt
when bubbling oxygen through propionaldehyde how does one no when it’s done or possibly know the %
when bubbling oxygen through propionaldehyde how does one no when it’s done or possibly know the %
There's the Buchner reaction. It starts with you putting some bitcoin in escrow and then the mechanism is me putting it in a priority mail box to somewhere that you can steal it off the porch, or wait like a stalking butler, ski mask in hand, to jack the mailman when he attempts to deliver it to that guy your sister used to date. Then you quench the excess salt by pushing that button to release the dough.
Or you could buy it off of Amazon. That's what I did. I was looking again today for something useful to do with it. Sodium propanoate? MAKE AN ESTER!?!? I don't remember what I paid for it but I remember it was way too cheap for me to want to make it.
Or you could buy it off of Amazon. That's what I did. I was looking again today for something useful to do with it. Sodium propanoate? MAKE AN ESTER!?!? I don't remember what I paid for it but I remember it was way too cheap for me to want to make it.
