Igoa oloa: 4-Hydroxybenzaldehyde

p-Hydroxybenzaldehyde;

PHBA;

CAS leai. 123-08-0

Fuafua Molecular: C7H6O2

Mamafa Molecular: 122.1213

Faʻavae Fausaga:

Density: 1.226g / cm3

Faʻaaogaina:E taua tele vailaʻau vailaʻau ma ogatotonu mo faʻalapotopotoga tuʻufaʻatasi, ma lautele faʻaaogaina i vailaʻau, aromatizer, vailaʻau tisaina, electroplating ma suavaia tioata alamanuia. I falemaʻi falemaʻi, e mafai ona faʻaaogaina e tuʻufaʻatasia ai vailauga o sulfonamides pei o lautele-fusi faʻapitoa sterilization synergist TMP, ampicillin ma semi-synthesized penicillin (oral) faʻapea foi ma le vaeluaina o d - (-) - p-hydroxy phenyl picramate. I le aromatizer alamanuia, e masani ona faʻaaogaina i raspberry ketone, methyl vanillin, ethyl vanillin, anisic aldehyde ma nitrile aromatizer. I vailaʻau vailaʻau, e masani ona faʻaaogaina e tuʻufaʻatasia ai ituaiga iniseti fou, vailaʻau oona, o-bromobenzonitrile ma le hydroxyl casoron. I le electroplating alamanuia, e mafai ona faʻaaogaina o se fou-ituaiga cyanogens-leai electroplating moli uila.

1.There tele gaioiga mo le gaosiga o p-hydroxybenzaldehyde. I le taimi nei, o le gaosiga o gaosiga e tele lava ina aofia ai phenol, p-cresol, p-nitrotoluene ma isi mea masani.

2.The phenol metotia mafai ona vaevaeina i Reimer Tiemann tali atu, gattermann tali atu, phenol Trichloroacetaldehyde auala, phenol glyoxylic auala auala, phenol formaldehyde auala, ma isi Phenol gaioiga e faʻaalia e ala i le faʻafaigofie ona ofi atu i mea masani, faigofie gaosiga gaioiga, maualalo fua ma maualuga tau
O le gaioiga o le p-nitrotoluene e gaosia ai le p-hydroxybenzaldehyde e aofia ai laʻasaga e tolu: faʻamamaina-faʻaititia, diazotization ma hydrolysis.

3.P-cresol catalytic oxidation o le gaioiga o le tuusaʻo oxidize p-cresol i p-hydroxybenzaldehyde ma le ea poʻo le okesene i lalo o le gaioiga a catalyst.

O le faʻagasologa o gaioiga faʻapenei: faʻaopopo p-cresol, sodium hydroxide ma le methanol i totonu o le ipu uʻamea le faʻamamaina, faʻaoso seʻia maeʻa atoa, faʻaopopo le cobalt acetate e faʻamau ai le reactor, siʻi le vevela i le 55 ℃ ma amata faʻalauiloa le okesene, taofi le mamafa i totonu o le vaʻa i le 1.5MPa ma tali atu mo le 8-10h, matua faʻatonutonu le okesene tafe fua i le tali atu gaioiga, ma faʻapipiʻi coil faʻamaluluina faiga i totonu o le vaʻa, pe a oso le vevela, le peleue o le a tuʻuina atu le vaʻa E mafai ona faʻafesoʻotaʻi le vai malulu. I le taimi lea, ua amata ona faʻafesoʻotaʻi le coil ma le vai malulu, faʻatonutonu le aofaʻi o le okesene, ma taofi le vevela i le ulo i le tusa ma le 60℃. I le faaiuga o le tali atu, o le mea na tuu i totonu o le autu autoclave, o le solvent methanol ua evaporated ma toe gaosia, ma ua faaopoopoina hydrochloric acid ina ua uma ona faaopoopo vai mo salting fafo. O le mautu-suavai mea e faʻamamaina e se centrifuge, ma le mautu mauaina na faʻamago i totonu o se lagona gaogao ogaumu pe tusa o le 60℃ mo le 3-5h, ona maua ai lea o le p-hydroxybenzaldehyde ma mea e sili atu i le 98%.