SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
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.
Juu
About 5 hours
Maagizo
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.
Vifaa kwa hatua hii:
Dimethyl terephthalate10.669 kg
1,4-Cyclohexanedimethanol2.456 kg
Ethilini glikoli4.058 kgZana zinazohitajika:
Titanium isopropoxide
n-Butanol
Mizani ya mizani-mbili
Rakta ya upolimishaji yenye koti
Chombo cha kunereka kwa sehemu
Miwani ya kinga dhidi ya kemikali2
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.
Zana zinazohitajika:
Rakta ya upolimishaji yenye kotiChombo cha kunereka kwa sehemu
Themokapo yenye kionyeshi3
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.
Zana zinazohitajika:
Rakta ya upolimishaji yenye kotiThemokapo yenye kionyeshiMizani ya mizani-mbili4
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.
Zana zinazohitajika:
Rakta ya upolimishaji yenye koti
Pampu ya utupu
Kipima utupu
Mtego baridi5
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 %).
Zana zinazohitajika:
Silinda ya gesi ya naitrojeni
Kitengeneza chembe
Glavu Zinazostahimili JotoVifaa
3- 10.669 kgKishikilia Nafasi
- 2.456 kgKishikilia Nafasi
- 4.058 kgKishikilia Nafasi
Zana Zinazohitajika
13- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- 1 vendor sell this, none ship to you yetKishikilia Nafasi
- Kishikilia Nafasi
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- Kishikilia Nafasi
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- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
Hatari
1,4-Cyclohexanedimethanol: Dimethyl Terephthalate Hydrogenated over Palladium, then Copper Chromite
na Charlie
Viwandani
3
0
0
0
0
0
Dimethyl Terephthalate: Terephthalic Acid and Methanol Sprayed through a Hot Tube
na Charlie
Viwandani
3
0
0
0
0
0
Hatari
Ethylene Glycol by Hydration of Ethylene Oxide
na Charlie
Viwandani
5
0
0
0
0
0
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.