Lebitso sehlahisoa: 4-Hydroxybenzaldehyde

leq-Hydroxybenzaldehyde;

PHBA;

CAS Nomoro: 123-08-0

Tsela ea limolek'hule: C7H6O2

Boima ba 'mele: 122.1213

Sebopeho sa Foromo:

Boikarabello: 1.226g / cm3

Sebelisa:Ho bohlokoa sehlahisoa se setle sa lik'hemik'hale ebile se mahareng bakeng sa tšebetso ea manyolo, ka ts'ebeliso e pharaletseng indastering ea meriana, aromatizer, chefo e bolaeang likokonyana, electroplating le liquid liquid. Indastering ea meriana, e ka sebelisoa ho kopanya li-intermediate tsa sulfonamide joalo ka TMP, ampicillin le penicillin e nang le seka-synthesized (molomo) hammoho le lipakeng tsa d - (-) - p-hydroxy phenyl picramate. Indastering ea aromatizer, e sebelisoa haholo ho raspberry ketone, methyl vanillin, ethyl vanillin, anisic aldehyde le nitrile aromatizer. Indastering ea chefo e bolaeang likokoanyana, e sebelisoa haholo ho kopanya sebolaya likokoanyana sa mofuta o mocha, sebolayalehola, o-bromobenzonitrile le hydroxyl casoron. Indastering ea li-electroplating, e ka sebelisoa e le mofuta o mocha oa khanya e sa sebetseng ea cyanogen.

Ho na le lits'ebetso tse ngata bakeng sa tlhahiso ea p-hydroxybenzaldehyde. Hajoale, tlhahiso ea indasteri e kenyelletsa haholo-holo phenol, p-cresol, p-nitrotoluene le lisebelisoa tse ling tse tala.

Mokhoa oa phenol o ka aroloa ka karabelo ea Reimer Tiemann, reaction reaction, phenol Trichloroacetaldehyde tsela, phenol glyoxylic acid acid, phenol formaldehyde route, jj. Phenol process e tšoauoa ka phihlello e bonolo ea lisebelisoa tse tala, ts'ebetso e bonolo ea tlhahiso, chai e tlase le phahameng theko.
Ts'ebetso ea p-nitrotoluene ho hlahisa p-hydroxybenzaldehyde e kenyelletsa mehato e meraro: phokotso ea oxidation, diazotization le hydrolysis.

3.P-cresol catalytic oxidation ts'ebetso ke ho kopanya p-cresol ka kotloloho ho p-hydroxybenzaldehyde ka moea kapa oksijene tlasa ts'ebetso ea sethothetsi.

Phallo e ikhethileng ea ts'ebetso e tjena: eketsa p-cresol, sodium hydroxide le methanol ka har'a sesebelisoa sa khatello ea tšepe e sa hloekang, hlohlelletsa ho fihlela e qhibiliha ka botlalo, eketsa cobalt acetate ho tiisa sekontiri, nyolla mocheso ho 55 ℃ 'me u qale ho hlahisa oksijene, boloka khatello ea sejana ka 1.5MPa' me u itšoare ka 8-10h, u laole ka tieo sekhahla sa phallo ea oksijene ts'ebetsong, 'me u kenye sistimi e khathollang ea sejana ka sekepeng, ha mocheso o phahama, baki ea sekepe se tla fuoa Metsi a pholileng a ka hokahanngoa. Ka nako ena, kela e qala ho hokahanngoa le metsi a pholileng, e laola oksijene ka botlalo, 'me e boloke mocheso ka ketleleng e ka ba 60℃. Qetellong ea karabelo, sesebelisoa se kenngoa ka har'a autoclave ea mantlha, methanol e qhibilihang e fetoha mouoane ebe e sebelisoa bocha, 'me hydrochloric acid e eketsoa kamora hore metsi a tšeloe bakeng sa ho tšeloa letsoai. Sesebelisoa se nang le mokelikeli o tiileng se tlhotliloeng ka centrifuge, 'me se tiileng se omisitsoe ka ontong e sa hloekang hoo e ka bang 60℃ bakeng sa 3-5h, joale p-hydroxybenzaldehyde e nang le litaba tse fetang 98% e ka fumaneha.