Zamgululi

Chizindikiro chazikhalidwe:

Maonekedwe: kuwala chikasu crystalline ufa

Zamkatimu: ≥ 99%

Limatsogolera mfundo: 77-79 ° C

Malo otentha: 219-221 ° CMM Hg

Kung'anima mfundo: 219-221 ° C / 18mm

Malangizo:

1. Amagwiritsidwa ntchito kwambiri ngati mtundu wa mankhwala osokoneza bongo osakhazikika a PVC ndi 1,3-diphenyl acrylonitrile (DBM). Monga chothandizira chatsopano chothandizira kutentha kwa PVC, imakhala ndi zotulutsa zambiri, zopanda poizoni komanso zopanda pake; itha kugwiritsidwa ntchito ndi calcium / zinc yolimba kapena yamadzi, barium / zinc ndi zina zotchinjiriza kutentha, zomwe zimatha kusintha bwino utoto woyambirira, kuwonekera poyera, kukhazikika kwa nthawi yayitali kwa PVC, komanso mpweya komanso "zinc yoyaka" pokonza. Amagwiritsidwa ntchito kwambiri popanga mankhwala, chakudya ndi zinthu zina zopanda poizoni zowonekera za PVC (monga mabotolo a PVC, mapepala, makanema owonekera, etc.).

2. Kuyamba kwa calcium ndi zinc stabilizers: (zotchinjiriza zachikhalidwe monga zotsogolera mchere ndi cadmium salt) zili ndi zovuta zowonekera poyera, kusiyanasiyana kwamitundu yoyamba, kuipitsidwa kosavuta pamiyendo ndi poyizoni. Zinc ndi cadmium ndizomwe sizitsitsimutso zowopsa. Ili ndi kutentha kwabwino kwambiri komanso mafuta, mawonekedwe oyamba abwino komanso kukhazikika kwamitundu.

Kukhazikika kwa matenthedwe a calcium / zinc yolimba ndiyosavomerezeka, chifukwa chake mitundu ingapo yamagetsi iyenera kuphatikizidwa molingana ndi ukadaulo waukadaulo ndikugwiritsa ntchito mankhwala. Mwa othandizira othandizira, β - diketones (makamaka stearoyl benzoyl methane ndi dibenzoyl methane) ndizofunikira kwambiri pakukhazikika kwa calcium / zinc.

Njira yopangira

Njira zoyambirira zopangira mafakitale zinali motere: kugwiritsa ntchito sodium methoxide yolimba monga chothandizira, acetophenone ndi methyl benzoate zidachitidwa ndi Claisen condensation mu xylene kuti apeze dibenzoylmethane. Chifukwa ufa wolimba wa sodium methoxide ndiwotheka kuyaka komanso kuphulika, ndipo ndikosavuta kuwola mukakumana ndi madzi, zosungunulira zimayenera kusowa madzi asanawonjezere, kenako methoxide yolimba ya sodium iyenera kuwonjezeredwa pansi pa chitetezo cha nayitrogeni mutazizira mpaka 35 ℃. Njira yoyankhira iyenera kutetezedwa ndi nayitrogeni, ndipo kugwiritsa ntchito methoxide yolimba ya sodium kumatha kukhala pachiwopsezo choteteza ndikugwiritsa ntchito mphamvu zambiri. Kuchuluka kwa molar wa acetophenone: methyl benzoate: solid sodium methoxide inali 1: 1.2: 1.29. Kawirikawiri zokolola za nthawi imodzi zinali 80%, ndipo zakumwa zonse zomwe mayi amamwa zinali 85.5%.

Njira yatsopano yopangira zinthu ndi iyi: 3000l xylene zosungunulira zimawonjezeredwa ku riyakitala, 215kg solid sodium hydroxide imawonjezeredwa, kuyambitsa kumayambika, kutentha kumakwera mpaka 133 ℃, ndipo madzi otsika pang'ono amasanduka nthunzi; ndiye 765kg methyl benzoate imawonjezeredwa, kutentha kumakwezedwa kukhala 137 ℃, 500kg acetophenone imawonjezeredwa motsika, ndipo kutentha komwe kumachitidwa kumasungidwa kutentha kwa 137-139 ℃. Ndi kuwonjezera kwa acetophenone, madzi amadzimadzi amayamba kuchepa. Chogulitsa methanol chimachotsedwa pakuchita kwake ndipo zomwe zimachitika zimapindulitsabe. Zosakaniza zosakaniza za methanol ndi xylene zasanduka nthunzi. Khalani maola awiri mutasiya. Ngati palibe distillate, zomwe zimachitika zimatha.

Wazolongedza: 25kg / thumba.

Kusamala: sungani mnyumba yosungira yozizira, youma komanso yopuma.

Mphamvu yapachaka: Matani 1000 / chaka