UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Benzyl Benzoate: Benzaldehyde and Sodium Benzylate
Charlie

Yenziwe ngu-

Charlie

18. uMfumfu 2026DE
5
0
0
0
0

Benzyl Benzoate: Benzaldehyde and Sodium Benzylate

Benzyl benzoate is an oily ester that dissolves PVC when hot and softens it. Kamm (Organic Syntheses, 1921): a little sodium dissolved in benzyl alcohol turns two molecules of benzaldehyde into one of benzyl benzoate. Keep it below 50 to 60 °C as it mixes, or it overheats into benzyl ether. 454 g of benzaldehyde give 410 to 420 g. Sodium metal burns in water: keep it dry. The picture: our own drawing.
Osezingeni eliphezulu
1 day

Imiyalelo

1

Dissolve the sodium in benzyl alcohol

Goggles and gloves on. Warm 3 g of sodium in 70 g of pure benzyl alcohol for half an hour until it dissolves. Let it cool to room temperature.

Amathuluzi adingekayo:

I-sodiumI-sodium
I-Benzyl AlcoholI-Benzyl Alcohol
Ibhodlela elinesisekelo esiyindilingaIbhodlela elinesisekelo esiyindilinga
Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)
Isikali sesilinganisoIsikali sesilinganiso
Amagilavu erabhaAmagilavu erabha
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
2

Add it to the benzaldehyde, cool

Add the solution little by little to 454 g of benzaldehyde, mixing well. Cool if needed to keep it just below 50 to 60 °C. It sets to a pasty jelly.

Izinto zokwakha zalesi sinyathelo:

I-BenzaldehydeI-Benzaldehyde454 g

Amathuluzi adingekayo:

Ibhodlela elinesisekelo esiyindilingaIbhodlela elinesisekelo esiyindilinga
IthemomithaIthemomitha
Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)
3

Warm on the water bath

When the temperature stops rising, after about half an hour, warm it on the water bath for one to two hours, shaking now and then.

Amathuluzi adingekayo:

Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)
Ibhodlela elinesisekelo esiyindilingaIbhodlela elinesisekelo esiyindilinga
4

Wash

Cool, add 200 ml of water and separate the oil. Wash it once more with water.

Amathuluzi adingekayo:

AmanziAmanzi
Ifasitela lokwehlukanisaIfasitela lokwehlukanisa
5

Distil under vacuum

Distil under vacuum. Benzyl alcohol, leftover aldehyde and water come first. When the temperature jumps, change the receiver: benzyl benzoate boils at 184 to 185 °C at 15 mm. Expect 410 to 420 g.

Amathuluzi adingekayo:

Ifulakhi Lengilazi LokuhluzaIfulakhi Lengilazi Lokuhluza
Ugoqo lwe-condenserUgoqo lwe-condenser
Iphampu yomoyaIphampu yomoya
IthemomithaIthemomitha
Amabhodlela engilazi anezivimboAmabhodlela engilazi anezivimbo

Izinto

1

Amathuluzi Adingekayo

14

Le blueprint yenza

Thumbnail
Isibambeli

I-Benzyl Benzoate

Free

3
0
1

Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Benzaldehyde: Oil of Bitter Almonds by Steam Distillation
Yingozi

Benzaldehyde: Oil of Bitter Almonds by Steam Distillation

ngu-CharlieDE

Organic

4
0
0
0
0
0

CC0 Isizinda Somphakathi

Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.

Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

Ingxoxo

(0)

Ngena ukuze ujoyine ingxoxo

Kulayishwa amazwana...