Igama lomkhiqizo: I-4-Hydroxybenzaldehyde

p-Hydroxybenzaldehyde;

PHBA;

Inombolo ye-CAS. 123-08-0

Ifomula Yamamolekhula: C7H6O2

Isisindo Yamamolekhula: 122.1213

Ifomula Yesakhiwo:

Ubuningi: 1.226g / cm3

Ukusetshenziswa:Kubalulekile umkhiqizo omuhle wamakhemikhali futhi ophakathi nendawo ngokuhlanganiswa kwezinto eziphilayo, okusetshenziswa kabanzi embonini yezokwelapha, i-aromatizer, i-pesticide, i-electroplating kanye ne-liquid crystal. Emkhakheni wemithi, ingasetshenziselwa ukuhlanganisa izixhumi zama-sulfonamide njenge-symeterization ebanzi ye-TMP, i-ampicillin ne-penicillin yomlomo (ngomlomo) kanye naphakathi kwe-d - (-) - p-hydroxy phenyl picramate. Embonini ye-aromatizer, isetshenziswa kakhulu ku-raspberry ketone, i-methyl vanillin, i-ethyl vanillin, i-anisic aldehyde ne-nitrile aromatizer. Embonini yezibulala-zinambuzane, isetshenziselwa ikakhulukazi ukuhlanganisa uhlobo olusha lwezinambuzane, i-herbicide, i-o-bromobenzonitrile ne-hydroxyl casoron. Emkhakheni we-electroplating, ungasetshenziswa njenge-brightener engenalo uhlobo olusha lwe-cyanogens.

Kunezinqubo eziningi zokukhiqizwa kwe-p-hydroxybenzaldehyde. Njengamanje, ukukhiqizwa kwezimboni ikakhulu kufaka phakathi i-phenol, p-cresol, p-nitrotoluene nezinye izinto zokusetshenziswa.

Indlela ye-phenol ingahlukaniswa ibe yiReimer Tiemann reaction, gattermann reaction, phenol Trichloroacetaldehyde umzila, phenol glyoxylic acid umzila, phenol formaldehyde umzila, njll. Inqubo yePhenol ibonakala ngokutholakala kalula kwezinto zokusetshenziswa, inqubo elula yokukhiqiza, isivuno esiphansi kanye nokuphakama izindleko.
Inqubo ye-p-nitrotoluene yokukhiqiza i-p-hydroxybenzaldehyde ifaka izinyathelo ezintathu: ukunciphisa i-oxidation, i-diazotization ne-hydrolysis.

I-3.P-cresol oxidation yokucubungula inqubo ukufaka ngqo i-p-cresol ku-p-hydroxybenzaldehyde ngomoya noma i-oxygen ngaphansi kwesenzo se-catalyst.

Ukugeleza kwenqubo okulandelayo kume kanje: engeza i-p-cresol, i-sodium hydroxide ne-methanol entweni engagqwali yengcindezi yensimbi, inyakazise ize ichitheke ngokuphelele, engeza i-cobalt acetate ukusayina ophendulayo, nyusa izinga lokushisa libe ngu-55 ℃ bese uqala ukwethula umoya-mpilo, gcina ingcindezi esitsheni ku-1.5MPa bese usabela ngo-8-10h, ulawule ngokuqinile izinga lokugeleza komoya-mpilo kunqubo yokuphendula, bese ufaka uhlelo lokupholisa ikhoyili emkhunjini, lapho izinga lokushisa lenyuka, ijakhethi umkhumbi uzonikezwa Amanzi okupholisa angaxhunywa. Ngalesi sikhathi, ikhoyili iqala ukuxhunyaniswa namanzi okupholisa, ilawule ngokuqinile inani eliphelele lomoya-mpilo, futhi igcine izinga lokushisa eketeleni licishe libe ngama-60℃. Ekupheleni kokuphendula, okokusebenza kufakwa kwi-autoclave eyinhloko, i-solvent methanol iyahwamuka iphinde isetshenziswe kabusha, kuthi i-hydrochloric acid ingezwe ngemuva kokungezwa kwamanzi okusawoti. Izinto ezinamanzi aqinile zihlungwa nge-centrifuge, kuthi okuqinile okutholwayo kumiswe kuhhavini wokuhlanza cishe kuma-60℃ kwe-3-5h, khona-ke i-p-hydroxybenzaldehyde enokuqukethwe okungaphezu kuka-98% kungatholakala.