إنتاج أكسيد الإيثيلين عبر الأكسدة بالفضة كمحفز
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://chemfyi.com/iframe/entity//" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>
Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://chemfyi.com/entity//
Add a dynamic SVG badge to your README or docs.
[](https://chemfyi.com/entity//)
Use the native HTML custom element.
وسيط رئيسي لمنظفات السطح ومضاد التجمد
نظرة عامة
Ethylene oxide (EO) is produced by the direct catalytic oxidation of ethylene over silver catalysts, making it one of the largest-scale selective oxidation processes in the chemical industry. EO is a critical intermediate for ethylene glycol (antifreeze and PET polyester), ethoxylated surfactants, and ethanolamines. The process requires extremely precise reaction control, as the desired partial oxidation competes with complete combustion to CO₂ and water.
العملية الكيميائية
Ethylene and oxygen (or air) are passed over promoted silver catalyst (Ag/α-Al₂O₃ with Cs and Re promoters) at 220-280 degrees C and 10-30 bar in multitubular fixed-bed reactors. The EO is absorbed in water from the reactor effluent and recovered by steam stripping. Selectivity is 80-90% with oxygen-based processes.
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O (undesired total combustion)
المواد الخام
-
Ethylene (C₂H₄) — Steam cracking (Reactant)
-
Oxygen (O₂) — Air separation unit (cryogenic) (Oxidant)
-
Silver catalyst (Ag/α-Al₂O₃) — Specialty catalyst manufacturers (Selective oxidation catalyst)
المنتجات النهائية
-
Ethylene oxide (C₂H₄O) — Ethylene glycol, surfactants, ethanolamines (>99.5% purity)
Environmental Impact
EO is a known human carcinogen and potent greenhouse gas. Fugitive emissions from EO plants are tightly regulated. The combustion side reaction wastes feedstock and generates CO₂. Scrubber systems capture EO from vent streams.
اعتبارات السلامة
- ⚠ Ethylene oxide is extremely flammable, explosive, and carcinogenic
- ⚠ Mixtures of ethylene and oxygen can detonate above certain concentrations
- ⚠ Runaway reaction risk due to highly exothermic combustion side reaction
- ⚠ Strict personal exposure limits (1 ppm TWA)
الابتكارات الحديثة
High-selectivity catalysts with rhenium and cesium promoters have pushed selectivity above 90%.
Microchannel reactor designs offer improved heat removal and safety.
Electrocatalytic ethylene epoxidation is being explored as a low-temperature alternative.
حجم الإنتاج
35000000
طن/سنة
$45 billion
القيمة السوقية
المزيد في %(name)s Petrochemical & Refining
إنتاج البولي إستر PET عبر التكثيف البوليمري
Global Industrial Scale
إنتاج البولي بروبيلين عبر تحفيز زيغلر-ناتا
Global Industrial Scale
الإصلاح الحفزي للبنزين عالي الأوكتان
Global Industrial Scale
التقطير التجزيئي للنفط الخام
Global Industrial Scale
التكسير الحراري بالبخار لإنتاج الإيثيلين
Global Industrial Scale
بلمرة البولي إيثيلين
Global Industrial Scale
تخليق فيشر-تروبش للوقود الاصطناعي
Commercial Production