Inoa mea kūʻai: 4-Hydroxybenzaldehyde

p-Hydroxybenzaldehyde;

PHBA;

ʻAʻole CAS.: 123-08-0

Molecular haʻilula: C7H6O2

Kaumaha Molecular: 122.1213

Nā Kūlana Kūlana:

ʻIno: 1.226g / cm3

Hoʻohana:He mea nui nā huahana kemika maikaʻi a waena waena no ka synthetic synthetic, me ka hoʻohana ākea i nā lāʻau lapaʻau, aromatizer, pesticide, electroplating a me nā aniani aniani wai. I ka ʻoihana lāʻau lapaʻau, hiki ke hoʻohana ʻia e synthesize i waena o sulfonamides e like me broad-spectrum sterilization synergist TMP, ampicillin a me semi-synthesized penicillin (waha) a me waena o d - (-) - p-hydroxy phenyl picramate. I ka ʻoihana aromatizer, hoʻohana nui ʻia ia i ka ketone raspberry, methyl vanillin, ethyl vanillin, anisic aldehyde a me nitrile aromatizer. I ka ʻoihana pesticide, hoʻohana ʻia ia e synthesize i ka insecticide hou, ʻano lāʻau ʻona, o-bromobenzonitrile a me hydroxyl casoron. I ka ʻoihana electroplating, hiki ke hoʻohana ʻia me he mea lā he mea hou like ʻole me ka cyanogens-free electroplating brightener.

1. Nui nā kaʻina hana no ka hana o p-hydroxybenzaldehyde. I kēia manawa, ʻo ka hana ʻenehana ka nui o nā phenol, p-cresol, p-nitrotoluene a me nā mea maka ʻē aʻe.

2.E hiki ke hoʻokaʻawale ʻia ka hana phenol i ka hopena Reimer Tiemann, ka hopena o ka gattermann, ke ala phenol Trichloroacetaldehyde, ke ala ʻākela phenol glyoxylic, ke ala phenol formaldehyde, a pēlā aku. kumu kūʻai.
ʻO ke kaʻina hana o ka p-nitrotoluene e hana i ka p-hydroxybenzaldehyde me nā ʻanuʻu he ʻekolu: hoʻoliʻiliʻi hoʻoliʻiliʻi, diazotization a me hydrolysis.

3. ʻO P-cresol catalytic oxidation ke kaʻina hana e hoʻopili pololei i ka p-cresol i p-hydroxybenzaldehyde me ka ea a i ʻole oxygen ma lalo o ka hana o catalyst.

Penei ke kahe o ke kaʻina kikoʻī: e hoʻohui i ka p-cresol, ka sodium hydroxide a me ka methanol i loko o ka ipu paipu kila, e hoʻāla a hiki i ka wā e pau ai, e hoʻohui i ka cobalt acetate e sila ai i ka reactor, e hoʻāla i ka mahana i 55 ℃ a hoʻomaka e hoʻolauna i ka oxygen, mālama i ka kaomi i ka moku ma 1.5MPa a hana no 8-10h, kaohi pono i ka nui o ke kahe o ka oxygen i ke kaʻina hana, a hoʻouka i ka ʻōnaehana hoʻohuihui coil i loko o ka ipu, ke piʻi aʻe ka mahana, ka ʻeke o e hoʻolako ʻia ka moku Hiki ke hoʻohui i ka wai hoʻoluʻolu. I kēia manawa, hoʻomaka ka ʻōwili e pili me ka wai anuanu, kaohi pololei i ka nui o ka oxygen, a mālama i ka mahana i ka ipu i kahi o 60℃. I ka hopena o ka hopena, hoʻokomo ʻia ka mea i loko o ka autoclave mua, hoʻopau ʻia a hana hou ʻia ka methanol hoʻoheheʻe, a hoʻohui ʻia ka waikawa hydrochloric ma hope o ka hoʻohui ʻia ʻana o ka wai no ka paʻakai ʻana. Hoʻopili ʻia ka mea paʻa-wai e kahi centrifuge, a hoʻomaloʻo ʻia ka paʻa i kahi umu hakahaka ma kahi o 60℃ no 3-5h, a laila p-hydroxybenzaldehyde me ka ʻike ma mua o 98% hiki ke kiʻi ʻia.