Sunan samfur: 4-Hydroxybenzaldehyde

p-Hydroxybenzaldehyde;

PHBA;

CAS Babu.: 123-08-0

Tsarin kwayoyin halitta: C7H6O2

Kwayoyin kwayoyin halitta: 122.1213

Tsarin tsari:

Yawa: 1.226g / cm3

Yana amfani da:Yana da mahimmanci samfurin sinadarai mai kyau da tsaka-tsaka don haɗakar ƙwayoyi, tare da amfani mai yawa a cikin magunguna, aromatizer, pesticide, zaɓaɓɓu da masana'antar lu'ulu'u na ruwa. A masana'antar hada magunguna, ana iya amfani dashi don hada matsakaitan na sulfonamides kamar su sinadarin kara karfin magana TM, ampicillin da penicillin mai hada baki da kuma matsakaiciyar d - (-) - p-hydroxy phenyl picramate. A masana'antar aromatizer, yawanci ana amfani dashi a cikin keton rasberi, methyl vanillin, ethyl vanillin, anisic aldehyde da nitrile aromatizer. A masana'antar maganin kwari, yawanci ana amfani dashi don hada sabbin magungunan kashe kwari, maganin kashe ciyawa, o-bromobenzonitrile da hydroxyl casoron. A cikin masana'antar zaban lantarki, ana iya amfani dashi azaman sabon nau'ikan mai samar da wutar lantarki mara nauyi na cyanogens.

1.Akwai matakai da yawa don samar da p-hydroxybenzaldehyde. A halin yanzu, masana'antun masana'antu sun hada da phenol, p-cresol, p-nitrotoluene da sauran albarkatun kasa.

Hanyar phenol za a iya kasu kashi biyu na Reimer Tiemann dauki, gattermann dauki, phenol Trichloroacetaldehyde hanya, phenol glyoxylic acid hanya, phenol formaldehyde hanya, da dai sauransu. kudin.
Tsarin p-nitrotoluene don samar da p-hydroxybenzaldehyde ya hada da matakai uku: hada-hadawan abu, sanyaya abu da kuma sinadarin hydrolysis.

3.P-cresol catalytic oxidation aikin shine a sanya p-cresol kai tsaye zuwa p-hydroxybenzaldehyde tare da iska ko oxygen a karkashin aikin mai kara kuzari.

Takamaiman tsari yana gudana kamar haka: ƙara p-cresol, sodium hydroxide da methanol cikin jirgin ruwan ƙarfe na ƙarfe, motsawa har sai ya narke gaba ɗaya, ƙara cobalt acetate don rufe mai sarrafawa, ƙara zafin jiki zuwa 55 ℃ kuma fara gabatar da iskar oxygen, kiyaye matsin lamba a cikin jirgi a 1.5MPa kuma amsa don 8-10h, tsaftace sarrafa iskar oxygen a cikin aikin aiwatarwa, kuma shigar da tsarin sanyaya a cikin jirgin, lokacin da zafin jiki ya tashi, jaket na za a bayar da jirgin ruwan Ana iya haɗa ruwan sanyaya. A wannan lokacin, murfin yana fara haɗuwa da ruwan sanyaya, mai tsananin sarrafa yawan oxygen, kuma kiyaye yawan zafin jiki a cikin butar a kusan 60℃. A ƙarshen aikin, ana saka kayan a cikin autoclave na farko, an cire narkewar methanol kuma a sake sarrafa shi, kuma an ƙara ruwan hydrochloric bayan an ƙara ruwa don salting. Tattalin abu mai ruwa-ruwa ana tace shi ta hanyar centrifuge, kuma daskararren da aka samu ya bushe a cikin tanda mai ɗumi kusan 60℃ don 3-5h, sannan p-hydroxybenzaldehyde tare da abun ciki fiye da 98% za'a iya samu.