Jauks un efektīvs ceļš pašsintēzes 2b4m sintēzei (vidēji 50 usd par kg)

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
Hey i ll tikai ierakstīt reaģentus, ko izmanto gudra izvēle (cena/ietilpība) aviable to buy in europe
Tātad 1.
PCL5 ar elementāro sēru > tionilhlorīds

tionilhlorīds + propionskābe > priopionilhlorīds

4mp sintēze (šeit ir tēma, tāpēc es varu pievienot tikai saiti):
Propionilhlorīds
Toluolsols
AlCl3 bezūdens

http://bbzzzsvqcrqtki6umym6itiixfhni37ybtt7mkbjyxn2pgllzxf2qgyd.onion/en/threads/synthesis-of-4-methylpropiophenone-from-toluene-by-friedel-crafts-reaction-1kg-scale.209/


dažaspplekan ir problēma to bromēt
sērskābe, kas nepieciešama, lai iegūtu Hbr, kas ir nedaudz dārga un nav bieži pieejama. Tā vietā mēs izmantojam:
Fosforskābi un NaBh reakcijai > iegūstam HBR.
H2O2 12 % var nopirkt un destilēt līdz vēl dažiem %, piemēram, 25-30 %.

Tātad
4 metilopropions + HBR + h2o2 > 2b4m :)

. Es neaprēķināju izmaksas, bet tās ir ļoti nelielas, un nav jāgaida sūtījums vai jābrīnās par zemas kvalitātes prekursoru.
 
Last edited:

chost

Don't buy from me
Resident
Language
🇩🇪
Joined
Apr 17, 2024
Messages
7
Reaction score
2
Points
3
Vai varat sīkāk paskaidrot, kā izgatavot HBR?
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
Ak, es tiešām atvainojos, ka pieļāvu kļūdu. tā ir pareiza:
Lai no fosforskābes (H₃PO₄) un nātrija bromīda (NaBr) iegūtu bromskābi (HBr), var izmantot dubultās izspiešanas reakciju. Reakciju var attēlot šādi:


  1. Reaktanti: Fosforskābe (H₃PO₄) un nātrija bromīds (NaBr).
  2. Produkti: Bromskābe (HBr) un nātrija fosfāts (Na₃PO₄).

Reakcijas līdzsvarotais ķīmiskais vienādojums ir:


H3PO4+3NaBr→3HBr+Na3PO4


Šajā reakcijā fosforskābe reaģē ar nātrija bromīdu, iegūstot bromskābi un nātrija fosfātu.
 
View previous replies…

chost

Don't buy from me
Resident
Language
🇩🇪
Joined
Apr 17, 2024
Messages
7
Reaction score
2
Points
3
Vai ir nepieciešama destilācija?
Un cik lielā ūdens daudzumā vajadzētu izšķīdināt nātrija bromīdu?
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
Kā citādi jūs plānojat iegūt lietu, kas būtībā ir gāze? :)

Tas ir atkarīgs no tā, kādus % jūs vēlaties, maksimums ir 47%, cik es atceros, un tam vajadzētu būt jau šādā veidā.
 

Benz88

Don't buy from me
Resident
Language
🇩🇪
Joined
Apr 4, 2022
Messages
19
Reaction score
5
Points
3
is it Safe to Distille the h2o2 to maybe 30-35% from 12%?
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17

TheVacuumGuy

Don't buy from me
Resident
Language
🇺🇸
Joined
Sep 20, 2023
Messages
160
Reaction score
65
Points
28
H3po4 ar NaBr, lai iegūtu HBr? Pēc brīža to izmēģināšu.

Ir daudz HBr, bet interesē, vai šie divi savienojumi reaģē.
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
jā un Na3PO4
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
Tas ir brīnišķīgi
 
View previous replies…

TheVacuumGuy

Don't buy from me
Resident
Language
🇺🇸
Joined
Sep 20, 2023
Messages
160
Reaction score
65
Points
28
Didn't work. I think it would be easier to add sulfuric acid to a solution of KBr (or NaBr) , which would readily yield HBr at 125c
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
I tried to override having sulfuric acid becasue here is troubles to get it. It was very extreme attempt
if there is access to sulfuric acid its easy job
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
you can get elemental bromine from potasium bromide, dont need to use acids.
it was quite cheap as i remember
 

Toddler

Don't buy from me
Member
Language
🇬🇧
Joined
Oct 22, 2024
Messages
4
Reaction score
1
Points
3
Hbr2 48% can work ?
(CAS.No: 10035-10-6)

how much ration use for bromination
Hbr2
H2O2
for 100g of 4MPP
 
Last edited:

w2x3f5

Don't buy from me
Resident
Language
🇬🇧
Joined
Jan 15, 2023
Messages
363
Reaction score
182
Points
43
Instead of propionyl chloride, can use propionic anhydride (obtain phosphorus oxide from propionic acid), can also use propionic acid directly with polyphosphoric acid (there are many options for this reaction, you can choose the best one). If propionyl chloride is used with anhydrous aluminum chloride (can be replaced with cheaper and simpler options). Then it is best to carry out a bromination reaction before hydrolysis in Fridel-Crafts (the complex of 2b4m and aluminum chloride is very active for bromination with a high yield).
 

Dr. MMX

Professional
Manufacturer Seller
Language
🇬🇧
Joined
Nov 28, 2023
Messages
234
Reaction score
141
Points
43
Deals
17
In chemistry trade buissness in europe propionic acid is considered with "silent restriction" with reason it can be used as biological weapon, so should be avoided there.

very interesting choice of propionic anhydride
 

Osmosis Vanderwaal

Moderator in US section
Resident
Joined
Jan 15, 2023
Messages
1,640
Solutions
4
Reaction score
1,171
Points
113
Deals
1
@TheVacuumGuy you gave him bad figures and he used them and probably ruined 100G 2B4-MP. I dont know what he paid, but I got $200 all day for 10g if it's domestic . In th rules there are a few gold nuggets. "Use the fucking search engine." That's a rule. Another one is " a good chemist i an accurate chemist." Make sure that you clearly state you are guessing when you don't know. You could say nothing at all, you could show your math or you could tell him he needs to figure it himself, but please, dont just throw out random numbers, with no disclaimer.
 
Top