High Density Polyethylene Recycling

HDPE yog qhov loj hlob sai tshaj plaws ntawm cov khoom siv yas raw khoom warehouse recycling lag luam. Qhov no feem ntau yog vim nws qhov yooj yim ntawm reprocessing, tsawg degradation zog thiab nws cov kev siv ntau hauv daim ntawv thov ntim. Lub ntsiab ub no yog reprocessing ntawm 25% recycled cov ntaub ntawv, xws li post-consumer recycled content (PCR), nrog ntshiab HDPE los tsim lub raj mis uas tsis nyob rau hauv kev sib cuag nrog zaub mov.
Hauv cov txheej txheem no, cov kuab tshuaj polymerization yog n-hexane thiab cov catalyst yog ib qho kev ua haujlwm siab zN catalyst. Tom qab ethylene thiab hydrogen sib xyaw, lawv nkag mus rau thawj lub reactor thiab sib xyaw nrog cov catalyst kom tau txais cov tshuaj tiv thaiv polymerization. Lub polymer nyob rau hauv lub reactor raug tshem tawm hauv hexane nyob rau hauv daim ntawv ntawm slurry. , lub polymerization kub yog hais txog 80 degree thiab lub polymerization siab yog tsawg tshaj li 10 bar. Cov txheej txheem no tuaj yeem tsim cov khoom lag luam nrog qhov ntom ntom ntawm 0.942 ~ 0.965 g / cm3 thiab qhov ntsuas kub ntawm 0.2 ~ 80. Cov comonomers yog propylene thiab 1-butene. Tsoos HDPE thiab Bimodal HDPE, cov kav dej siab, cov kav dej siab muaj kev ua tau zoo tshaj plaws thiab tsim nyog rau kev ua kom lub siab kav, ncav cuag {15}}. Cov yam ntxwv ntawm slurry tank reactor nruam polymerization txheej txheem yog: tsis tshua muaj kev khiav hauj lwm siab thiab kev khiav hauj lwm kub; lub dual-kub reactor tuaj yeem tsim ib leeg-modal thiab bimodal cov khoom hauv ntau hom kev sib txuas thiab sib txuas; Cov txheej txheem siab ua haujlwm yooj yim, cov khoom lag luam hloov pauv tau nrawm thiab tsis tas yuav muaj purity siab ntawm raw cov ntaub ntawv; cov comonomers yog propylene thiab 1-butene; hexane yog siv los ua cov kuab tshuaj thiab cov chav tsev rov qab yog qhov yooj yim. Cov yam ntxwv ntawm cov txheej txheem no yog tias lub polymerization yog nqa tawm nyob rau hauv ib qho inert hydrocarbon diluent.