Petroleum benzene feem ntau yog tsim los ntawm cov txheej txheem xws li catalytic hloov kho, ethylene tawg, thiab toluene disproportionation, nrog siab purity; Hydrogenated benzene yog tsim los ntawm thee coking txheej txheem los tsim crude benzene, uas yog tom qab refined los ntawm hydrogenation. Hydrogenated benzene tej zaum yuav muaj me me ntawm impurities xws li sulfur thiab nitrogen nyob ntawm cov khoom ntawm raw cov ntaub ntawv thiab qhov tob ntawm hydrogenation; Coking benzene yog ib lo lus dav dav rau cov kua qaub ntxuav benzene, hydrogenated benzene, thiab refined benzene. Hom thiab theem ntawm impurities muaj feem xyuam rau cov khoom siv thee thiab lawv cov tshuab ua haujlwm.
1, Upstream ntawm benzene
(1). Kev npaj naphtha los ntawm kev hloov pauv catalytic.
(2). Toluene yog npaj los ntawm toluene disproportionation, thiab tseem tuaj yeem tsim xylene raws li cov khoom lag luam, uas txuas mus rau hauv qab raws li ib feem ntawm PX-PTA-PET kev lag luam saw.
(3). Naphtha yog npaj los ntawm ethylene cracking . 4. Crude benzene yog tsim los ntawm thee coking thiab refined los ntawm hydrogenation ntawm crude benzene.
2, Ncua tseg ntawm benzene
(1). Styrene SM: Benzene thiab ethylene reacted nyob rau hauv ob kauj ruam los npaj styrene (benzene ethylbenzene styrene), uas tuaj yeem tsim ntxiv rau hauv polystyrene PS, HIPS, EPS, ABS resin, ASA resin.
(2). Caprolactam: Caprolactam tuaj yeem tsim los rau hauv qab los npaj nylon 6, thiab nylon 6 thiab nylon 66 yog ob hom nylon feem ntau siv.
(3). Phenol: Benzene thiab propylene react nyob rau hauv ob kauj ruam los npaj phenol (benzene isopropylbenzene phenol), uas tuaj yeem tsim ntxiv rau cov resins lossis reacted nrog acetone los npaj bisphenol A. Bisphenol A yog ib qho tseem ceeb nruab nrab ntawm kev tsim cov epoxy resins thiab polycarbonate.
(4). Nitrobenzene: Nitrobenzene yog npaj los ntawm nitration cov tshuaj tiv thaiv ntawm benzene thiab tov kua qaub, ua raws li hydrogenation txo los tsim aniline. Aniline yog ib qho tseem ceeb raw khoom rau MDI.
(5). Adipic acid: Benzene yog hydrogenated los tsim cyclohexane, uas tom qab ntawd oxidized nrog huab cua los tsim KA roj (kev sib xyaw ntawm cyclohexanol thiab cyclohexanone), thiab thaum kawg oxidized nrog nitric acid los tsim adipic acid. Adipic acid yog ib qho tseem ceeb monomer rau zus tau tej cov nylon 66 (reacting nrog hexamethylenediamine, lwm yam monomer yog adiponitrile).
