P-Hydroxybenzaldehyde
Orukọ ọja: 4-Hydroxybenzaldehyde
p-Hydroxybenzaldehyde;
PHBA;
CAS Bẹẹkọ.: 123-08-0
Agbekalẹ molikula: C7H6O2
Iwuwo molikula: 122.1213
Ilana agbekalẹ:
Iwuwo: 1.226g / cm3
Awọn lilo:O ṣe pataki ọja kemikali ti o dara ati agbedemeji fun isopọpọ Organic, pẹlu lilo jakejado ni iṣoogun, aromatizer, pesticide, electroplating ati awọn ile-iṣẹ kristali olomi. Ni ile-iṣẹ iṣoogun, o le ṣee lo lati ṣapọpọ awọn agbedemeji ti sulfonamides gẹgẹbi alasopọ onimọra fifin jakejado TMP, ampicillin ati pẹnisilini idapọpọ olopọ-sise (roba) ati agbedemeji ti d - (-) - p-hydroxy phenyl picramate. Ninu ile-iṣẹ aromatizer, a lo ni akọkọ ninu rasipibẹri ketone, methyl vanillin, ethyl vanillin, anisic aldehyde ati nitrile aromatizer. Ninu ile-iṣẹ ipakokoropaeku, a lo ni akọkọ lati ṣapọ iru apakokoro apakokoro, herbicide, o-bromobenzonitrile ati hydroxyl casoron. Ninu ile-iṣẹ itanna itanna, o le ṣee lo bi irufẹ itanna itanna ọfẹ ti cyanogens-ọfẹ.
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Atọka orukọ |
Iye Atọka |
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Irisi |
Itanna ite |
Iṣeduro Iṣoogun |
Ite turari |
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funfun lulú okuta |
Bia lulú okuta alawọ ofeefee |
Bia lulú okuta alawọ ofeefee |
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Ti nw:% |
≥99.8 |
≥99.5 |
≥99 |
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Ọrinrin:% |
≤0.3 |
≤0.3 |
≤0.5 |
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Ibi yo: ℃ |
115,5 ~ 118 |
115 ~ 118 |
114,5 ~ 116,5 |
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Kiloraidi: PPm |
≤50 |
≤50 |
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Irin eru: PPm |
.8 |
.8 |
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Insoluble% |
≤0.05 |
≤0.05 |
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1. Awọn ilana pupọ lo wa fun iṣelọpọ ti p-hydroxybenzaldehyde. Lọwọlọwọ, iṣelọpọ ile-iṣẹ ni akọkọ pẹlu phenol, p-cresol, p-nitrotoluene ati awọn ohun elo aise miiran.
Ọna phenol ni a le pin si ifaseyin Reimer Tiemann, ifa gattermann, ipa phenol Trichloroacetaldehyde, ipa ọna phenol glyoxylic acid, ipa ọna phenol formaldehyde, bbl Ilana Phenol jẹ ifihan nipasẹ iraye si awọn ohun elo aise, ilana iṣelọpọ ti o rọrun, ikore kekere ati giga iye owo.
Ilana ti p-nitrotoluene lati ṣe agbejade p-hydroxybenzaldehyde pẹlu awọn igbesẹ mẹta: idinku-ifoyina, ijẹrisi ati hydrolysis.
3.P-cresol catalytic oxidation ilana naa ni lati taara oxid-p-cresol taara si p-hydroxybenzaldehyde pẹlu afẹfẹ tabi atẹgun labẹ iṣẹ ti ayase.
Ṣiṣan ilana kan pato jẹ bi atẹle: ṣafikun p-cresol, iṣuu soda hydroxide ati kẹmika sinu ọkọ irin alagbara irin alagbara, aruwo titi ti yoo fi tuka patapata, ṣafikun acetate cobalt lati fi edidi ohun riakito naa, gbe iwọn otutu si 55 ℃ ki o bẹrẹ lati ṣafihan atẹgun, tọju titẹ inu ọkọ oju omi ni 1.5MPa ki o ṣe fun 8-10h, ṣakoso iṣakoso oṣuwọn atẹgun ni ilana iṣesi, ati fi ẹrọ itutu agbaiye sinu ọkọ, nigbati iwọn otutu ba ga soke, jaketi ti ao pese ọkọ oju omi Omi itutu naa le sopọ. Ni akoko yii, okun naa bẹrẹ lati ni asopọ pẹlu omi itutu agbaiye, ni iṣakoso gbogbo iye atẹgun, ati tọju iwọn otutu ninu igbomikana ni iwọn 60℃. Ni opin ifaseyin, a fi ohun elo sinu autoclave akọkọ, a ti yọ kẹmika epo ni imunirun ati tunlo, ati pe omi hydrochloric ti ṣafikun lẹhin ti a fi omi kun fun iyọ. Awọn ohun elo olomi-olomi ti wa ni sisẹ nipasẹ centrifuge kan, ati pe ohun ti a gba ri ti gbẹ ni adiro igbale ni iwọn 60℃ fun 3-5h, lẹhinna p-hydroxybenzaldehyde pẹlu akoonu diẹ sii ju 98% le ṣee gba.