Dzina mankhwala: 4-Hydroxybenzaldehyde

p-Hydroxybenzaldehyde;

PHBA;

CAS Ayi: 123-08-0

Chilinganizo maselo C7H6O2

Maselo kulemera: 122.1213

Kandalama chilinganizo:

Kachulukidwe: 1.226g / cm3

Ntchito:Ndikofunika mankhwala abwino komanso apakatikati pazinthu zamagulu, zomwe zimagwiritsidwa ntchito kwambiri popanga mankhwala, aromatizer, mankhwala ophera tizilombo, electroplating ndi mafakitale a kristalo. M'makampani opanga mankhwala, amatha kugwiritsidwa ntchito kuphatikizira ma intermediates a sulfonamides monga yotsekemera yotakata kwambiri ya TMP, ampicillin ndi semi-synthesized penicillin (m'kamwa) komanso pakatikati pa d - (-) - p-hydroxy phenyl picramate. Makampani a aromatizer, amagwiritsidwa ntchito kwambiri mu rasipiberi ketone, methyl vanillin, ethyl vanillin, anisic aldehyde ndi nitrile aromatizer. M'makampani opanga mankhwala ophera tizilombo, amagwiritsidwa ntchito kwambiri popanga mankhwala amtundu watsopano, herbicide, o-bromobenzonitrile ndi hydroxyl casoron. M'makampani opanga magetsi, atha kugwiritsidwa ntchito ngati chowunikira chatsopano cha cyanogens chopanda magetsi.

1. Pali njira zambiri zopangira p-hydroxybenzaldehyde. Pakadali pano, mafakitale amaphatikizapo phenol, p-cresol, p-nitrotoluene ndi zina zopangira.

Njira ya phenol itha kugawidwa mu Reimer Tiemann reaction, gattermann reaction, phenol Trichloroacetaldehyde njira, phenol glyoxylic acid njira, phenol formaldehyde njira, ndi zina. Njira ya phenol imadziwika ndi kupezeka kosavuta kwa zopangira, njira yosavuta yopangira, zokolola zochepa komanso zochuluka mtengo.
Njira ya p-nitrotoluene yopanga p-hydroxybenzaldehyde imaphatikizapo magawo atatu: kuchepetsa makutidwe ndi okosijeni, diazotization ndi hydrolysis.

3.P-cresol othandizira okosijeni njirayi ndiyowonjezera p-cresol mwachindunji ku p-hydroxybenzaldehyde ndi mpweya kapena mpweya pansi pa chothandizira.

Njira yomwe ikuyendera ndi iyi: onjezani p-cresol, sodium hydroxide ndi methanol muzitsulo zosapanga dzimbiri zosapanga dzimbiri, zosunthira mpaka zitasungunuka kwathunthu, onjezerani cobalt acetate kuti musindikize ractor, kwezani kutentha mpaka 55 ℃ ndikuyamba kuyambitsa mpweya, pitilizani kupanikizika mu chotengera pa 1.5MPa ndikuchitapo kanthu kwa 8-10h, onetsetsani kuti mpweya ukuyenda bwino momwe zimachitikira, ndikuyika koyilo kozizira mumtsuko, kutentha kukakwera, jekete la chombo chidzaperekedwa Madzi ozizira amatha kulumikizidwa. Pakadali pano, koyilo imayamba kulumikizidwa ndi madzi ozizira, kuyang'anira mpweya wonse wokwanira, ndikusunga kutentha kwa ketulo pafupifupi 60℃. Pamapeto pa zomwe zimachitika, zinthuzo zimayikidwa mu autoclave yoyamba, methanol yosungunuka imasandulika ndikusinthidwa, ndipo hydrochloric acid imawonjezeredwa madzi atawonjezeredwa kuti atuluke. Zinthu zolimba zamadzimadzi zimasefedwa ndi centrifuge, ndipo zolimba zimayanika mu uvuni wopumira pafupifupi 60℃ kwa 3-5h, ndiye kuti p-hydroxybenzaldehyde yokhala ndi zinthu zoposa 98% imatha kupezeka.