Kayayyaki

Alamar inganci:

Bayyanar: foda mai haske rawaya

Abun ciki: ≥ 99%

Matsar narkewa: 77-79 ° C

Matsayin tafasa: 219-221 ° CMM Hg

Maɓallin filashi: 219-221 ° C / 18mm

Umarni:

1. Ana amfani dashi ko'ina azaman nau'ikan maganin kwantar da zafi na nontoxic na PVC da 1,3-diphenyl acrylonitrile (DBM). A matsayin sabon mataimaki mai karfafa zafi don PVC, yana da watsawa mai yawa, maras guba da ɗanɗano; ana iya amfani da shi tare da daskararre ko ruwa mai ƙanshi / zinc, barium / zinc da sauran masu karfafa zafi, wanda zai iya inganta launuka na farko, nuna gaskiya, kwanciyar hankali na PVC na dogon lokaci, da kuma hazo da “zinc kona” yayin aiki. Ana amfani dashi ko'ina a likitanci, marufin abinci da sauran kayayyakin PVC marasa ƙarancin guba (kamar kwalban PVC, zanen gado, finafinai masu haske, da sauransu).

2. Gabatarwar sinadarin calcium da zinc: (masu daidaita al'adu kamar masu gishirin gishiri da masu sanya gishirin cadmium) suna da rashin ingancin rashin gaskiya, bambancin launi na farko, sauƙin gurɓatuwa da guba. Zinc da cadmium ba su da guba masu guba. Yana da kyakkyawan kwanciyar hankali da lubricity, kyakkyawan canza launi da kwanciyar hankali.

Stabilityarfin zafin jiki na tsarkakakken sinadarin calcium / zinc ba shi da kyau, don haka ya kamata a haɗa nau'ikan mahadi bisa ga fasahar sarrafawa da aikace-aikacen samfurin. Daga cikin masu tallafi na taimako, β - diketones (galibin stearoyl benzoyl methane da dibenzoyl methane) suna da matukar muhimmanci a cikin ƙwayoyin calcium / zinc.

Hanyar roba

Tsarin samar da masana'antu na asali ya kasance kamar haka: ta amfani da ingantaccen sodium methoxide azaman mai kara kuzari, acetophenone da methyl benzoate sun sami karbuwa daga Claisen condensation a xylene don samun dibenzoylmethane. Saboda daskararren sodium methoxide foda yana iya kamawa da abubuwa masu fashewa, kuma yana da sauƙin narkewa yayin ganawa da ruwa, dole ne abu mai narkewar ya zama mai rauni kafin ƙarawa, sannan kuma dole ne a ƙara daskararren sodium methoxide ƙarƙashin kariyar nitrogen bayan sanyaya zuwa 35 '. Dole ne a kiyaye aiwatar da aikin ta nitrogen, kuma yin amfani da ingantaccen sodium methoxide yana da babban haɗarin aminci da amfani mai ƙarfi. Yanayin molar acetophenone: methyl benzoate: m sodium methoxide ya kasance 1: 1.2: 1.29. Matsakaicin amfanin lokaci daya na samfurin ya kasance 80%, kuma wadataccen amfanin uwar giya ya kasance 85.5%.

Sabon tsarin samar da sikeli shine kamar haka: an kara 3000l xylene mai narkewa a cikin reactor, an kara 215kg solid sodium hydroxide, an fara motsawa, an daga zafin jiki zuwa 133 ℃, kuma an cire ruwa mai dan kadan; sannan an kara 765kg methyl benzoate, zazzabin ya tashi zuwa 137 ℃, an kara 500kg acetophenone digo digo-digo, kuma ana kiyaye yanayin zafin a zazzabin dakin 137-139 ℃. Tare da ƙari na acetophenone, ruwan abincin a hankali yakan zama mai kauri. An cire methanol ɗin da aka samo daga hanyar aiwatarwa kuma aikin ya gudana a cikin kyakkyawar shugabanci. Cakuda mai narkewa na methanol da xylene an kwashe shi. Rike tsawon awanni 2 bayan faduwa. Lokacin da babu kusan distillate, aikin zai ƙare.

Shiryawa: 25kg / jaka

Kariyar kariya: adana a cikin ɗakuna mai sanyi, bushe da kuma iska mai kyau.

Matsayin shekara-shekara: Tan 1000 / shekara