Cov khoom lag luam

Kev ua tau zoo index:

Pom: lub teeb daj crystalline hmoov

Cov ntsiab lus: ≥ 99%

Melting point: 77-79 ° C

Cov ntsiab lus npau: 219-221 ° CMM Hg

Flash point: 219-221 ° C / 18mm

Cov lus qhia:

1. Nws yog dav siv los ua ib hom ntawm cov tsis xws luag thermal stabilizer rau PVC thiab 1,3-diphenyl acrylonitrile (DBM)). Raws li qhov chaw pabcuam tshiab pabcuam tshav kub rau PVC, nws muaj cov kis tau zoo, tsis muaj tshuaj lom thiab tsis qab; nws tuaj yeem siv nrog cov khoom los yog kua calcium / zinc, barium / zinc thiab lwm yam kub ceev, uas tuaj yeem txhim kho qhov pib xim, pob tshab, ruaj ntseg ntev ntev ntawm PVC, nrog rau nag lossis daus thiab "zinc hlawv" thaum lub sijhawm ua. Siv dav hauv kev kho mob, ntim khoom noj khoom haus thiab lwm cov khoom lag luam tsis muaj tshuaj lom PVC pob tshab (xws li PVC fwj, ntawv ci, pob tshab zaj duab xis, thiab lwm yam).

2. Kev qhia txog cov calcium thiab zinc stabilizers: (tshuaj kho kom zoo li qub ua kom cov ntsev ua kom lub zog ruaj khov thiab cadmium ntsev stabilizers) muaj qhov tsis zoo ntawm kev ua tsis zoo, qhov pib xim txawv, yooj yim sib kis thiab lom. Zinc thiab cadmium yog non-toxic stabilizers. Nws muaj zoo thermal stability thiab lubricity, zoo heev thawj xim thiab xim xim.

Lub thermal stability ntawm cov ntshiab calcium / zinc stabilizer tsis zoo, yog li ntau lub tebchaw yuav tsum tau muab tso ua ke raws li cov txheej txheem thev naus laus zis thiab daim ntawv thov ntawm cov khoom. Ntawm cov ntu pabcuam khov kho, β - diketones (feem ntau stearoyl benzoyl methane thiab dibenzoyl methane) yog qhov tsis tuaj yeem nyob rau hauv calcium / zinc composite stabilizers.

Synthetic txoj kev

Txheej txheem kev tsim khoom lag luam qub tau muaj raws li hauv qab no: siv cov khoom sib xyaw sodium methoxide li catalyst, acetophenone thiab methyl benzoate tau hnov ​​mob los ntawm Claisen hws hauv xylene kom tau dibenzoylmethane. Vim tias cov tshuaj sodium methoxide hmoov yog qhov kub nyhiab thiab tawg, thiab nws yooj yim rau kev xeb thaum sib ntsib nrog dej, cov kuab tshuaj yuav tsum ua kom lub cev qhuav ua ntej ntxiv, thiab tom qab ntawd cov tshuaj sodium methoxide yuav tsum tau ntxiv nyob rau hauv kev tiv thaiv ntawm nitrogen tom qab txias txog 35 ℃. Cov txheej txheem tshuaj tiv thaiv yuav tsum muaj kev tiv thaiv los ntawm nitrogen, thiab siv cov khoom siv sodium methoxide muaj qhov ua rau muaj kev phom sij zoo thiab muaj lub zog loj. Cov tshuaj lom neeg piv ntawm acetophenone: methyl benzoate: cov tshuaj sodium methoxide yog 1: 1.2: 1.29. Qhov ntsuas nruab nrab ib zaug ntawm cov khoom lag luam yog 80%, thiab cov txiaj ntsig zoo ntawm cov niam cawv tau 85,5%.

Kev tsim cov txheej txheem tshiab loj yog raws li hauv qab no: 3000l xylene solvent ntxiv rau cov reactor, 215kg cov khoom siv sodium hydroxide ntxiv, nplawm yog pib, qhov kub tau nce mus rau 133 ℃, thiab cov dej qis ua haujlwm yog evaporated; tom qab ntawd 765kg methyl benzoate ntxiv rau, qhov kub tau nce mus rau 137 ℃, 500kg acetophenone ntxiv tau ntxiv dropwise, thiab qhov tshuaj tiv thaiv kub tau khaws cia hauv chav sov 137-139 ℃. Nrog ntxiv ntawm acetophenone, pub kua maj mam ua cov tuab dua. Cov tshuaj methanol tshem tawm los ntawm cov txheej txheem tshuaj tiv thaiv thiab cov tshuaj tiv thaiv tau raws li qhov zoo. Qhov hnyav sib xyaw ua ke ntawm methanol thiab xylene yog evaporated. Khaws rau 2 teev tom qab poob. Thaum yuav luag tsis muaj qhov ua tiav, qhov kev tawm tsam xaus.

Cov: 25kg / hnab.

Kev ceev faj cia: muab cia rau hauv qhov chaw txias, qhuav thiab muaj cua tshuab zoo.

Lub peev xwm txhua xyoo: 1000 tons / xyoo