Hydroxybutyraldehyde, which is main material of synthesizing 3-hydroxybutyric acid was prepared through the aldol condensation of acetaldehyde in this paper. The properly reaction conditions of acetaldehyde condensation and paraldehyde depolymerization was studied and obtained.

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Paraldehyde, INH, lactic acid...

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The optimum conditions of synthesis were determined as follows:molar ratio of 2,4-di-t-amylphenol and anhydrous trimeric acetaldehyde 2∶1.2,amount of water 180 g,amount of emulsifier 0.5 g,and amount of catalyst 11.0 g at reacting temperature 80～83℃ for 5 h.

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Paragrapher：分段型船舶

paragraph 節(jié)免费网站华人、段 | paragrapher 分段型船舶 | paraldehyde 三聚乙醛

paraldehyde：三聚乙醛

paralagoon 邊緣瀉湖 | paraldehyde 三聚乙醛 | paraliageosyncline 海濱地槽

paraldehyde：副醛(三聚乙醛)

Paraffin wax fume 石蠟煙霧 | Paraldehyde 副醛(三聚乙醛) PP-S1,S3 | Paramethadione 甲乙雙酮 PP-S1,S3

Paraldehyde poisoning：三聚乙醛中毒

Parainfectious affection 副傳染病 | Paraldehyde poisoning 三聚乙醛中毒 | Paraleprosy; Mild leprosy; Abortive leprosy 副麻風(fēng)

Paraldehyde, INH, lactic acid：三聚乙醛,乳酸,異煙肼

Oh, it's a mnemonic. That makes sense, too.|哇,那是記憶術(shù),有道理 | Paraldehyde, INH, lactic acid...|三聚乙醛,乳酸,異煙肼... | - Rewind. - INH?|- 繞圈 - 異煙肼?

ethanal trimer：三聚乙醛

ethanal tetramer四聚乙醛 | ethanal trimer三聚乙醛 | ethanamide乙酰胺

tricarbimide; isocyanuric acid：三碳酰亞胺;異三聚氰酸

三己酸甘油酯 tricaproin | 三碳酰亞胺;異三聚氰酸 tricarbimide; isocyanuric acid | 三氯乙醛;氯醛 trichloroacetaldehyde; chloral

metaformaldehyde：三聚甲醛

三聚丙烯醛 metacrolein | 三聚甲醛 metaformaldehyde | 聚乙醛 metaldehyde

paracetaldehyde：三聚乙醛

paracervix子宮頸旁組織 | paracetaldehyde三聚乙醛 | paracetamol退熱凈 撲熱息痛 對乙酰氨基酚

trithiocarbonic acid：三硫碳酸

三聚硫代苯甲醛 trithiobenzaldehyde | 三硫碳酸 trithiocarbonic acid | 三聚硫乙醛 trithiolacetaldehyde