1. Abusuabɔ pɔtee a ɛda ɔhyew ne nhyɛso ntam ma vacuum distillation of n-pentanol
N-pentanol (1-pentanol) a ɛbobɔ wɔ wim nhyɛsoɔ mu no yɛ 138℃, nanso wɔbɛtumi atew so kɛseɛ denam vacuum distillation so. Sɛnea "Lang's Handbook of Chemistry" (16th edition) ne nhwehwɛmu data kyerɛ no:
1. Wɔ 20 mmHg nhyɛsoɔ mu: nsuo a ɛbobɔ no bɛyɛ 68-72℃, a ɛyɛ vacuum tebea a wɔtaa de di dwuma wɔ aduruyɛdan mu.
2. Wɔ 10 mmHg nhyɛso mu: ɔhyew no so tew bio kodu bɛyɛ 55-58 digrii .
3. Wɔ 50 mmHg nhyɛso mu: ne bow no bɛyɛ 85-90℃.
*Data Source*: Atifi hɔ botaeɛ no gyina honam fam agyapadeɛ database a ɛyɛ gyinapɛn ne nwoma amanneɛbɔ so. Ɔhyew ankasa betumi asakra ±2 digrii esiane nneɛma te sɛ nnwinnade no pɛpɛɛpɛ ne efĩ a ɛwɔ mu nti.
Vacuum distillation ma nhyehyɛe no nhyɛso so tew, na ɛma ɛyɛ mmerɛw sɛ nsu molecule ahorow beguan afi nsu no fã no mu na akɔhyɛn vapor fã no mu, na ɛnam so ama nsu a ɛbobɔ no so atew. Wɔ medium-polarity solvents te sɛ n-pentanol fam no, nsuo a ɛbobɔ no so tew bɛyɛ 10-15℃wɔ nhyɛsoɔ no fã biara mu.
II. Nsɛntitiriw ne Nimdeɛ Foforo a Wɔde Ma Vacuum Distillation
1. Nnwinnade a Wɔpaw: Fa nhyɛso-a ɛko tia kurukuruwa-ase ahina, vacuum pɔmpɛ, ne awɔw afiri di dwuma na ama woahwɛ ahu sɛ wobɛsɔ no yiye.
2. Ɔhyew a Wɔhwɛ So: Wɔkamfo kyerɛ sɛ wɔmfa ngo aguare na amma ɔhyew a ɛboro so wɔ baabiara. Bere a wɔreyɛ distillation ankasa no, ɛsɛ sɛ wɔde thermometer no si vapor outlet no so na ama wɔakenkan no pɛpɛɛpɛ.
3. Ahobanbɔ ho Afotu: n-pentanol yɛ nea ogya tumi hyew na ɛsɛ sɛ wɔde sie baabi a ogya tɔ. Ɔhyew a ɛba mpofirim wɔ nhyɛso a ɛso atew ase no betumi ama anoa a ano yɛ den, enti ebia ɛho behia sɛ wɔde zeolite anaa magnetic kankan.
Nnwuma a Wɔatrɛw Mu:
- n-pentanol na wɔtaa de di dwuma wɔ hua a wɔyɛ ne nnuru a wɔde yɛ ntamgyinafo mu. Vacuum distillation betumi ama nneɛma no ho atew.
- Sɛ ɛho hia sɛ wɔpaapae isomers (te sɛ 2-pentanol) mu bio a, wobetumi de fractionating column adi dwuma de ayɛ tebea horow no yiye.
III. Adwumayɛfoɔ Data Ntotoho ne Nsɛmmisa a Wɔtaa Ka
Nhoma ahorow bɔ amanneɛ sɛ ɛsono sɛnea n-pentanol no bow wɔ nhyɛso a wɔatew so mu no bow kakra. Nhwɛsoɔ:
CRC Handbook of Chemical Physics ka sɛ ɛyɛ digrii 70 wɔ 20 mmHg mu;
Merck Index no ma ɛyɛ digrii 69 .
Saa abirabɔ yi fi akwan a wɔfa so susuw nneɛma ne nhwɛsode no ahotew mu. Wɔkamfo kyerɛ sɛ wɔmfa sɔhwɛ ketewaa bi so susuw ho ansa na wɔasɔ ahwɛ.
Sɛ yɛbɛbɔ no mua a: Ɛsɛ sɛ wogyina nhyɛsoɔ a wɔde asi wɔn ani so no so kyerɛ vacuum distillation temperature ma n-pentanol. Wɔkamfo kyerɛ sɛ ɔhyew bɛyɛ digrii 70 wɔ 20 mmHg, na ɛsɛ sɛ wogyina nnwinnade tebea pɔtee bi so yɛ nsakrae.
