Styrene: Yuav ua li cas txaus ntshai thiab yuav ua li cas?

Styrene-hu ua film kua tshuaj muaj ib qho kev tsis hnov tsw uas yuav ua mob tau rau tib neeg noj qab haus huv. Tam sim no phenylethylene, vinylbenzene thiab ethylene yog lug siv nyob rau hauv kev lag luam tsuas yog nyob rau zus tau tej cov polymers thiab hluavtaws rubbers. Ntawm cov hoob kawm, qhauj thaum ua hauj lwm nrog cov tshuaj yuav tsum nruj me ntsis soj ntsuam kev ruaj ntseg ceev faj.

Qhuav ntawm styrene

Tau cov khoom no nyob rau hauv tshwj xeeb chaw (advanced kev kawm yuav ncav cuag 150-300 txhiab tons ntawm cov khoom ib xyoo) los ntawm dehydrogenation. Cov tshuaj tiv thaiv, uas tau synthesized styrene dej num raws li endothermic thiab yuav siv sij hawm qhov chaw nyob rau ib tug kub ntawm txog 600-700 degrees. Qhov no siv ib tug hlau oxide catalyst nrog rau qhov sib ntxiv ntawm chromium thiab poov tshuaj. Cov uas ua pov tseg yog kho los ntawm ib tug multi-theem system. Yog hais tias koj ua txhaum rau kev siv los yog zus tau tej cov technology yuav tshwm sim styrene emissions mus rau hauv ib puag ncig. Hais txog dab tsi nws feem ntau muaj txim, tham ib tug me ntsis tsawg dua. Ua ntej, peb piav qhia txog qhov tseeb hais tias qhov no tshuaj yog dab tsi thiab yam ntxwv nws txawv.

zog

Yog li ntawd, zoo li cas ntawm cov tshuaj - styrene? Nws cov khoom yog manifold. Cia peb xav txog lawv:

• txom nyem heev solubility nyob rau hauv dej;
• Lub teeb oxidation;
• npaj txhij solubility nyob rau hauv cov organic tebchaw;
• lub peev xwm los nkag yaj polymers;
• polymerization tsim tau ib cov khoom vitrified loj;
• copolymerization nrog lub monomers;
• accession halogens.

Sau cov tib neeg lub cev styrene, yog heev unpleasant tsw uas tej zaum yuav ob ntawm lub qaum hlab cua, thiab los ntawm digestive ib ntsuj av. Nyob rau hauv ncaj qha kev sib cuag nrog kua muaj nws, tej zaum nws yuav yuav absorbed los ntawm daim tawv nqaij.

Styrene thiab ib puag ncig

Qhov no tshuaj yog heev teeb meem thiab yuav muaj ib tug tsis zoo feem on sia nyob. Txawm li cas los, lub styrene nyob rau hauv cov huab cua sai heev decomposes. Yog li ntawd, txawm hais tias lo tawm ntau raug mob xwm, nws yuav tsis thov. Cov av thiab nqhuab styrene decomposes rau hauv nws cov constituent tshuaj. Cov tib yam tshwm sim nyob rau hauv cov huab cua thiab nyob rau hauv tus ntawm tshav ntuj.

Txawm li cas los, nyob rau hauv cov xeev feem ntau lub siab tshaj plaws pes tsawg tus ntawm tshuaj tawm txim liab mus rau hauv lub surrounding ib puag ncig ntawm lub enterprise, yog tswj los ntawm txoj cai lij choj.

Cov kev cai rau kev ua hauj lwm nrog styrene

Nyob rau hauv zus tau tej cov no tshuaj thiab nws siv rau qhov siv thiab ua polymers, ntawm chav kawm, yuav tsum soj ntsuam kev ruaj ntseg. Nyob rau hauv feem ntau lub teb chaws ntawm lub ntiaj teb no teev cov nyiaj pab ntau tshaj pub concentration ntawm styrene nyob rau hauv lub chav nyob rau hauv uas ua hauj lwm ntawm lub tuam txhab no muaj nyob. Nyob rau hauv cov kev cai ntawm tej kev cob qhia nws yog pom zoo kom equip npaum cua tshuab. Ntawm cov hoob kawm, tus neeg ua hauj lwm ntawm cov qhauj yuav tsum ceev faj tsis txhob nqus tau cov vapors styrenics thiab siv koj tus kheej tiv thaiv cov khoom yog tias tsim nyog.

Saib kev ruaj ntseg, nws nrog lwm yam (catalysts, peroxides, additives) styrene. Tshua ua nrog cov lus qhia, tej zaum yuav mus sai heev los yog nyob rau hauv ib tug undesired hom. Ntshav styrenes thiab nws yuav tsum tau nqa tawm nyob rau hauv nyias muaj nyias ib chav tsim los rau lub hom phiaj no thiab zoo ventilated.

Polymerization ntawm styrene tshwm sim txawm nyob rau hauv chav tsev kub. Cov kev txaus ntshai ntawm tus txheej txheem no yog hais tias nws yuav ua tau nyob rau hauv ib qho kev tawg. Yog li ntawd, cov tshuaj yeeb dej caw yuav tsum tau muab cia rau hauv raws li cov lus qhia.

styrene mob rau tib neeg lub cev

Tiv tauj nrog rau qhov no tshuaj tej zaum yuav ua rau ib tug neeg raws li mob lom cov tshuaj tiv thaiv thiab mob kab mob. Zoo tag nrho cov kabmob - ob lub raum, lub siab, urinary, ntshav system - yuav muaj cuam tshuam los ntawm xws li officers ntawm tshuaj xws li styrene. Yuav ua li cas txaus ntshai yog qhov no carcinogen rau cov tib neeg uas nyob rau hauv txhua tus ntawm cov neeg mob nyob rau hauv kev nthuav dav thiab sib tham hauv qab no. Styrene yog suav tias yog tshuaj lom mauj toxicity thiab siv rau 2 chav kawm ntawv ntawm teeb meem. Kev tuag rau tib neeg yuav ua nyob rau hauv nqus tau pa tej huab cua muaj 10 000 mg / m ³ ntawm styrene.

Yuav ua li cas yuav ua rau mob los styrene

Thaum lub concentration ntawm cov pa nyob rau hauv cov huab cua nyob rau hauv ib tug npaum li ntawm 420 mg / ^m3 nyob rau hauv tib neeg pib qhia tej yam tshwm sim ntawm voos ntawm cov qog ua kua week ntawm lub pa ib ntsuj av tau thiab lub qhov muag. Thaum cov ntsiab lus tshaj 840 mg / m ³ tsim xeev siab thiab nkees nkees. Nyob rau hauv cov ntaub ntawv no, tus neeg muaj tag nrho cov hom teeb meem nrog rau cov vestibular apparatus.

kev tshuaj ntsuam genetic hloov

Mutagenic nyhuv - tsis tau lwm xeeb txob uas yuav pw nyob rau hauv tos ib pliag rau ib tug txiv neej, rau ib ntev lub sij hawm nqus styrene. Yuav ua li cas txaus ntshai nws yog nyob rau hauv no li cas? Judging los ntawm cov kev tshawb fawb zaum, nws yog tau hais tias ntev-lub sij hawm nqus tau pa ntawm styrene vapor yuav ua tau kom ib qho kev nce nyob rau hauv lub zaus ntawm chromosome ntxwv aberrations nyob rau hauv peripheral ntshav lymphocytes. Cov kev tshawb fawb tau ua dua lub neeg ua hauj lwm ua hauj lwm nyob rau hauv tus txheej txheem ntawm zus tau tej cov polystyrene thiab siv tam yas.

Nyhuv on playback muaj nuj nqi

Tests nqa tawm nyob rau nas, kuj ua rau nws tau pom tias nqus tau cov pa styrene yuav muaj nyob rau hauv uas muaj sia nyob fetotoxic nyhuv. Txawm li cas los, ib daim ntawv ntsuam ntawm cov poj niam, neeg ua hauj lwm ntawm qhauj rau zus tau tej cov styrene, tsis muaj ib yam kev ua txhaum lawv yeej tsis qhia.

carcinogenic los

Ob peb cov kev tshawb fawb tau paub tseeb hais tias hais tias nqus tau pa ntawm styrene tsub kom qhov uas yuav mob qog nqaij hlav ntawm lub hematopoietic thiab lymphatic systems ntawm cov neeg. Txawm li cas los, qhov no ua rau muaj peev xwm tsuas tshwm sim nyob rau sij hawm ntev heev (rau xyoo) raug vapors ntawm xws tshuaj.

pub ntau

Yog li ntawd, peb tau soj ntsuam yuav ua li cas ntau raug mob yuav tau mus thov mus rau cov tib neeg lub cev styrene. Yuav ua li cas txaus ntshai no tshuaj cov khoom, koj tam sim no to taub. Ntawm cov hoob kawm, nyob rau hauv cov cheeb tsam uas muaj cov neeg ib tug ntev lub sij hawm, lub concentration ntawm cov tshuaj yeeb dej caw vapors yuav tsum tsis txhob ntau tshaj lub siab tshaj plaws permissible txwv. Thaum lub qhauj ntawm lawv siv los yog ntau lawm ntawm polymers thiab rubbers, nws yuav tsum tau muaj nyob rau hauv cov huab cua nyob rau hauv ib tug npaum li ntawm tsis muaj ntau tshaj:

• nyob rau hauv cov ua hauj lwm hauv cheeb tsam - 30 g / m ^3;
• nyob rau hauv cov dej lub cev - 0,02 g / l.

Txhais li cas-ua haujlwm siab tshaj plaws pub concentration ntawm ib yam khoom xws li styrene nyob rau hauv cov huab cua yog 10 mg / m ^3, qhov nruab nrab - 0,002 mg / m ^3, muaj ib zaug xwb - 0,04 mg / m ^3.

Styrene nyob rau hauv cov zaub mov ntim

Tu siab, qhov no tshuaj tej zaum yuav nkag mus rau tib neeg lub cev tsis tau tsuas yog thaum cov ib puag ncig rau cov nroj tsuag emissions. Polystyrene thiab acrylonitrile-butadiene-styrene, yog lug siv ntawm tso tawm ntim rau cov thauj thiab cia ntawm foodstuffs. Nws yuav zoo li hais tias lawv yuav tsum kiag harmless. Txawm li cas los, cov kev tshawb fawb pom tias styrene monomer yog tau mus rau hauv cov zaub mov los ntawm ob lub mos mos thiab nyuaj los ntawm lub ntim. Nyob rau hauv tej rooj plaub, txawm ib yam khoom uas muab khoom noj khoom haus, mis nyuj los yog kua txiv, ib tug unpleasant saj.

Ii styrene, uas yog heev unpleasant tsw, thiab nyob rau hauv qhuav ntawm khoom hauv tsev, siv cov ntaub ntawv thiab thiaj li nyob. D.

kev puas tsuaj rau Styrofoam

Qhov no cov ntaub ntawv uas yog tam sim no ib tug ntawm cov feem ntau nrov hom rwb thaiv tsev. Koj muaj peev xwm yuav nws nyob rau hauv tej khoom kho vajtse, thiab nws yog siv heev lug, xws li nyob rau hauv kev tsim kho ntawm lub tsev vaj tse. Meanwhile polystyrene undergoes degradation yooj yim decompose thaum lub sij hawm lub neej tag nrho lub sij hawm los ntawm 10-15%. Thaum zoo li no monomer cov ntsiab lus ntawm decomposition cov khoom yog tsawg kawg yog 65%.

Nyob rau hauv tas li ntawd, nyob rau hauv qhuav ntawm no rhaub polymerization ntawm styrene yog tsis tshua muaj tag thiab niaj hnub. Qhov no txhais tau tias nyob rau hauv lub pellets yog ib txwm ib tug residual nyiaj ntawd. Yog li ntawd, copolymers ntawm styrene, nyob rau hauv txhua rooj plaub emit noxious pa. Qhov tseeb hais tias kev siv ntawm cov insulator rau rwb thaiv tsev ntawm thaj chaw yog txwv tsis pub hauv cov kev cai, hmoov tsis, peb paub deb tsis yog txhua txhua. Nyob rau hauv cov ntaub ntawv no nws yog ib qho zoo tseem siv lwm yam ntaub ntawv. Txawm li cas los, yuav tsum paub, thiab hais tias styrene yog muaj nyob rau hauv xws li nyob rau hauv lub ua npuas ncauj. Txij li thaum lub yam khoom uas yog xam tau tias yog yuav tsum tau ntau teeb meem tshaj formaldehyde, yog tseem zoo dua mus insulate lub tsev los ntawm lub sab hauv nrog mineral wool.

yas wallpaper

Tej zaum tus tswv ntawm qhov tsis paub txog qhov tseeb hais tias lub xov ntaub ntawv siv rau kev kho, muaj styrene. Yuav ua li cas txaus ntshai no tshuaj cov khoom rau tib neeg, peb twb pom. Yog li ntawd, hais txog pej xeem cov ntaub ntawv thiab tsev neeg cov khoom tej zaum yuav tam sim no, yuav tsum paub twv yuav raug hu muaj nqis. Piv txwv li, ib tug me me npaum li cas ntawm cov tshuaj yeeb dej caw uas muaj nyob hauv lub yas wallpaper. Txawm li cas los, tsis zoo li Styrofoam, hom xov rau cov phab ntsa hauv ib thaj tsam chaw yuav siv tau. Nyob rau hauv zoo tib yam tej yam kev mob ntawm styrene wallpaper yog tsis faib. Yuav kom ib tug chav papered nrog yas nyob vapors, tsim nyog yuav ua tau kom lub ambient kub yog tsis tsawg tshaj li 50 degrees Celsius.

ABS-yas

ABS yog cuam tshuam resistant cob siv rau qhov siv thiab ua tsheb qhov chaw (phau ntawv ntawm lwm yam uas, dashboards, thiab lwm yam .. D.), housings ntawm khoom vaj khoom tsev (lub tshuab nqus tsev, tej thaj chaw deb ntawm lwm yam uas, kas fes) thiab electronics (CPU, saib), rooj tog zaum, cov kais dej, kev kho mob cov khoom siv , suitcases thiab txawm yog me nyuam cov khoom ua si.

Nyob rau hauv lub qub xeev ntawm tej kev uas yuav muaj rau tib neeg noj qab haus huv, tag nrho cov yam yog tsis tam sim no. Styrene ntshiab pib cais los ntawm lawv xwb raws li nram qab no:

• Ib tug heev muaj zog cua sov.
• Nyob rau hauv cov tshuaj thaum siv nrog biomaterial.
• Nyob rau hauv peb nruab cov yas rau zaub mov cia. Tshwj xeeb yog tsis tsim nyog pouring rau hauv ntim tej khoom dej caw. Nyob rau hauv cov ntaub ntawv no rau hauv cov nyhuv yog zoo li cov cua kub.

Tam sim no, faib ua feem ntawm styrenic polymers xws li ABS, tag nrho cov khoom thiab engineering yas yog 50%.

Yuav ua li cas nyob rau hauv cov ntaub ntawv ntawm kev qaug tshuaj lom styrene

Nyob rau hauv cov ntaub ntawv uas, yog tias ib tug txiv neej rau ib tug ntev lub sij hawm raug txhawb ntau ntawm styrene pa thiab nws muaj tej yam tshwm sim ntawm kev qaug tshuaj lom, koj yuav tsum ua tej no:

• Tshem tawm cov neeg los ntawm cov kab mob thaj chaw mus ntxuav huab cua.
• Yog tsis nco lawm los yog heev neeg pluag mob siv ib cov pa daim npog qhov ncauj.
• Yog hais tias tsim nyog, ua ib co kev ua pa.
• Saib xyuas tus kub ntawm lub cov lub cev. Nws yuav tsum tsis txhob muab ntau zog los yog poob.

Thaum styrene yog nyob rau ntawm daim tawv nqaij los yog qog ua kua week yuav tsum tshaj ntxuav nrog dej. Kev kho mob lub sij hawm yuav tsum tsis txhob yuav tsawg tshaj li 15 feeb. Tom qab nws kawm tus neeg yuav tsum tau yuav tsum tau coj mus rau tsev kho mob. Yog hais tias styrene dheev tau hauv lub cev, nws yog tsim nyog ua ntej ntawm tag nrho cov mus haus dej haus loj heev cov nqi ntawm cov mis los yog dej. Tom qab no, tus neeg mob yuav tsum tau sai li sai tau pw tsev kho mob.

Raws li koj tau pom, zus tau tej cov styrene - ib txoj kev uas, yog hais tias tsis muaj kev ruaj ntseg cov kev cai rau cov neeg ua haujlwm yog tsis harmless. Yog li ntawd, nqa tawm ntau lawm paub tab nyob rau hauv qhauj yuav tsum tau ceev faj thiab ceev faj. Yuav tsum tau ceev faj ntawm thaum yuav niaj hnub tsev cov ntaub ntawv thiab cov zaub mov nyob rau hauv polystyrene ntim.