P-Hydroxybenzaldehyde
Ingoa hua: 4-Hydroxybenzaldehyde
p-Hydroxybenzaldehyde;
PHBA;
CAS Nama: 123-08-0
Tātai rāpoi: C7H6O2
Taumaha rāpoi: 122.1213
Tātai Hangahanga:
Taumaha: 1.226g / cm3
Whakamahinga:He mea nui te hua matū pai me te takawaenga o te koiora koiora, me te whānuitanga o te rongoa, te aromatizer, te pesticide, te hiko me nga umanga karaihe wai. I roto i te umanga rongoa, ka taea te whakamahi ki te whakakao i nga takawaenga o sulfonamides penei i te synergist sterilization whanui-whanui TMP, ampicillin me te penicillin haurua-waihanga (waha) tae atu ki te takawaenga o te d - (-) - p-hydroxy phenyl picramate I roto i te umanga aromatizer, ka whakamahia i te nuinga o te ketone raspberry, methyl vanillin, ethyl vanillin, aldehyde anisic me te aromatizer nitrile. I roto i te umanga pesticide, ka whakamahia hei whakakotahi i nga momo ngarara hou, momo patu patu otaota, o-bromobenzonitrile me te hydroxyl casoron. I roto i te umanga hikohiko, ka taea te whakamahi hei kaiwhakaka-hiko-kore-hiko hou-momo.
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Tauputanga ingoa |
Uara Tohu |
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Te Ahua |
Kōeke Hiko |
Kōeke Hauora |
Kararehe Taumata |
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paura tioata ma |
Paura kowhai kowhai paura |
Paura kowhai kowhai paura |
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Pure:% |
≥99.8 |
≥99.5 |
≥99 |
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Makuku:% |
≤0.3 |
≤0.3 |
≤0.5 |
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Ira rewa: ℃ |
115.5 ~ 118 |
115 ~ 118 |
114.5 ~ 116.5 |
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Kauhau: PPm |
≤50 |
≤50 |
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Konganuku Taumaha: PPm |
≤8 |
≤8 |
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% Reare |
≤0.05 |
≤0.05 |
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1. He maha nga waahanga mo te hanga p-hydroxybenzaldehyde. I tenei wa, ko te mahinga umanga ko te phenol, p-cresol, p-nitrotoluene me etahi atu rauemi mata.
2. Ko te tikanga phenol ka taea te wehe ki te urupare Reimer Tiemann, te urupare a te gattermann, te ara phenol Trichloroacetaldehyde, te ara waikawa phenol glyoxylic, te ara phenol formaldehyde, me etahi atu. utu
Ko te mahinga o te p-nitrotoluene ki te whakaputa p-hydroxybenzaldehyde e toru nga hikoinga: te whakaheke-hautanga, te diazotization me te hydrolysis.
3.P-cresol catalytic oxidation ko te tikanga kia whakaorihia te p-cresol ki te p-hydroxybenzaldehyde me te hau, te oxygen ranei i raro i nga mahi a te kaiwhakato.
Ko te rere o te hātepe e whai ake nei: taapirihia te p-cresol, te konutai waihoe me te methanol ki roto i te ipu peera kowiri, whakaohohia kia mimiti ana, taapiri i te acetate cobalt ki te hiiri i te piere, whakarahi i te mahana ki te 55 ℃ me te tiimata ki te whakauru i te oxygen, kia mau ki te pehanga ki te 1.5MPa ka whakautu mo te 8-10h, kia tino whakahaere i te tere rere o te hāora i roto i te hātepe tauhohenga, me te whakauru i te punaha tautau o te kohinga ki te ipu, ka piki ake te mahana, te koti o ka hoatuhia te kaipuke Ka taea te hono te wai whakamatao. I tenei wa, ka tiimata te hono o te coil ki te wai whakamatao, kia tino whakahaerehia te nui o te oxygen, kia mau ki te mahana i te kohua 60 pea℃. I te mutunga o te uruparenga, ka whakauruhia nga taonga ki te autoclave tuatahi, ka ngongo te methanol whakarewa ka hangarua, ka taapirihia te waikawa hydrochloric i muri i te taapiringa o te wai mo te tote. Ko te taonga totoka-wai ka taatarihia e te centrifuge, a, ko te mea totoka i tangohia ka maroke i roto i te oumu korehau i te takiwa o te 60℃ mo te 3-5h, katahi ka taea te tiki p-hydroxybenzaldehyde me te ihirangi neke atu i te 98%.