SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Styrene: Ethylbenzene and Steam over a Magnesia-Iron Oxide Catalyst
Charlie

Imeundwa na

Charlie

20. Oktoba 2026DE
5
0
0
0
0

Styrene: Ethylbenzene and Steam over a Magnesia-Iron Oxide Catalyst

Styrene is ethylbenzene with two hydrogen atoms taken off, the 'S' in ABS. Kearby's process (US 2,395,875, 1946) passes the hydrocarbon with plenty of steam over a catalyst of magnesia with iron oxide and a little potassium and copper oxide at 1100–1300 °F (about 590–700 °C). The steam dilutes the vapour and burns off coke, and the catalyst is regenerated every few hours. The patent's worked figures are for butene; for ethylbenzene it gives these general conditions, which we use. The picture: our diagram.
Juu
Continuous

Maagizo

1

Make the catalyst

Mix magnesia with ferric nitrate solution, adding ammonia to precipitate all the iron as hydroxide. Wash, then mix in copper nitrate and potassium nitrate solutions. Dry, heat to 1000 °F (about 540 °C) and press into pills. Aim for about 72.4 % MgO, 18.4 % Fe2O3, 4.6 % K2O and 4.6 % CuO (amounts as required).

Zana zinazohitajika:

Oksidi ya magnesiamuOksidi ya magnesiamu
Nitrati ya feriNitrati ya feri
Myeyusho wa amonia - asilimia 25-28Myeyusho wa amonia - asilimia 25-28
Nitrati ya shabaNitrati ya shaba
Nitrati ya potasiamu (chumvi ya baruti)Nitrati ya potasiamu (chumvi ya baruti)
Maji yaliyosafishwa kwa mvukeMaji yaliyosafishwa kwa mvuke
Kifaneli cha Büchner (kauri)Kifaneli cha Büchner (kauri)
Karatasi ya KuchujaKaratasi ya Kuchuja
Tanuri la kukaushiaTanuri la kukaushia
Tanuri ya muffleTanuri ya muffle
Mashine ya kubana vidongeMashine ya kubana vidonge
Mizani ya mizani-mbiliMizani ya mizani-mbili
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
2

Pass ethylbenzene and steam over it

Fill a tube reactor with the pills and hold it at 1100–1300 °F (about 590–700 °C). Feed ethylbenzene vapour with 4 to 8 volumes of steam per volume, at 100–1000 volumes of hydrocarbon per volume of catalyst an hour.

Vifaa kwa hatua hii:

EthilibenziniEthilibenzini1 kipande

Zana zinazohitajika:

Riakta ya mirija yenye kitanda kisichohamishikaRiakta ya mirija yenye kitanda kisichohamishika
Boila ya mvukeBoila ya mvuke
Pampu ya kuhamishiaPampu ya kuhamishia
Themokapo yenye kionyeshiThemokapo yenye kionyeshi
3

Regenerate every few hours

After ½ to 7 hours, shut off the hydrocarbon and pass steam, air or both through the catalyst at 1100–1300 °F to burn off the coke, then resume.

Zana zinazohitajika:

Boila ya mvukeBoila ya mvuke
Riakta ya mirija yenye kitanda kisichohamishikaRiakta ya mirija yenye kitanda kisichohamishika
Themokapo yenye kionyeshiThemokapo yenye kionyeshi
4

Condense and distil

Ours: condense the product, run off the water layer, and distil the styrene from the unchanged ethylbenzene, which goes back to the reactor (the patent recycles it).

Zana zinazohitajika:

Koili ya kifidishajiKoili ya kifidishaji
Faneli ya kutenganishaFaneli ya kutenganisha
Nguzo ya kunereka kwa ombweNguzo ya kunereka kwa ombwe

Vifaa

1
  • 2
    Ethilibenzini
    1 kipande
    Kishikilia Nafasi

Zana Zinazohitajika

21

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Stirini

Free

14
0
1

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Ethylbenzene: Ethylene Bubbled through Benzene over an Aluminium Chloride Complex
Hatari

Ethylbenzene: Ethylene Bubbled through Benzene over an Aluminium Chloride Complex

na CharlieDE

Viwandani

6
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.

Majadiliano

(0)

Ingia kujiunga na majadiliano

Inapakia maoni...