UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
PETG Pellets: Dimethyl Terephthalate with Ethylene Glycol and CHDM
PETG is PET in which part of the ethylene glycol is replaced by CHDM, which keeps the plastic clear and amorphous. Eastman's patent US 7,026,027 describes PETG 6763 as terephthalate with about 69 mol % ethylene glycol and 31 mol % CHDM, but gives no recipe for it. This blueprint is our own combination: that composition, made by the same patent's pilot-plant process (Example 12, written for a CHDM/neopentyl glycol copolyester), with ethylene glycol in place of neopentyl glycol as in Kibler's 1959 Eastman patent. The charge weights are our arithmetic.
The picture: our diagram.
Hejuru
About 5 hours
Amabwiriza
1
1
Charge the reactor
Charge the reactor
Our charge for 31 mol % CHDM: 10.669 kg dimethyl terephthalate (54.9 mol, as in the patent's example), 2.456 kg CHDM (31 % of those moles) and 4.058 kg ethylene glycol, so the glycols total 1.5 times the ester moles as in the example. Add 53.4 g of catalyst solution (15 g titanium isopropoxide in 250 ml n-butanol). The patent's reactor held 18 gallons and had spiral agitators and a distillation column.
Ibikoresho by'iyi ntambwe:
Dimethyl terephthalate10.669 kg
1,4-Cyclohexanedimethanol2.456 kg
Etilene glikoli4.058 kgIbikoresho bikenewe:
Titanium isopropoxide
n-Butanol
Umunzani w'ibiro
Igikoresho cyo gukora polymère gifite ikoti
Ikinyuza umwuka gitandukanya
Amadarubindi yo Kwirinda Ibinyabutabire2
2
Ester interchange at 200 °C
Ester interchange at 200 °C
Stir (forward 50 minutes, then reverse 10), heat to 200 °C and hold 2 hours. Methanol distils off through the column.
Ibikoresho bikenewe:
Igikoresho cyo gukora polymère gifite ikotiIkinyuza umwuka gitandukanya
Termokupuli ifite igaragaza3
3
260 °C, then 280 °C
260 °C, then 280 °C
Raise to 260 °C for 30 minutes and weigh the distillate, then raise to 280 °C and weigh it again. The surplus ethylene glycol is driven off; Kibler found the CHDM stays in the polymer.
Ibikoresho bikenewe:
Igikoresho cyo gukora polymère gifite ikotiTermokupuli ifite igaragazaUmunzani w'ibiro4
4
Polymerise under vacuum
Polymerise under vacuum
Switch the agitator direction every 6 minutes and pull vacuum at 13 Torr a minute down to 0.5 Torr. Hold full vacuum for 45 minutes at 25 rpm.
Ibikoresho bikenewe:
Igikoresho cyo gukora polymère gifite ikoti
Pompe ikuramo umwuka
Igipima icyuho cy'umwuka
Umutego w’ubukonje5
5
Extrude and chop into pellets
Extrude and chop into pellets
Let nitrogen in, extrude the polymer at once and chop it into pellets. Check the composition: in the patent's example the polymer kept slightly less CHDM than was charged (38.1 % for 40.7 %).
Ibikoresho bikenewe:
Silinderi ya azote
Imashini ikata utubuto
Uturindantoki twihanganira ubushyuheIbikoresho
3- 10.669 kgUmwanya
- 2.456 kgUmwanya
- 4.058 kgUmwanya
Ibikoresho bikenewe
13- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- 1 vendor sell this, none ship to you yetUmwanya
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Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
Akaga
1,4-Cyclohexanedimethanol: Dimethyl Terephthalate Hydrogenated over Palladium, then Copper Chromite
na Charlie
By'Inganda
3
0
0
0
0
0
Dimethyl Terephthalate: Terephthalic Acid and Methanol Sprayed through a Hot Tube
na Charlie
By'Inganda
3
0
0
0
0
0
Akaga
Ethylene Glycol by Hydration of Ethylene Oxide
na Charlie
By'Inganda
5
0
0
0
0
0
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.