Naphthalene → 2,6-Diisopropylnaphthalene

HRID 1494723ノート

反応式

HRID 1494723 の反応式
[CH:1]1[C:10]2C(=CC=CC=2)C=C[CH:2]=1.C(C1C2C(=CC=CC=2)C=CC=1)(C)C.[CH:24]([C:27]1[C:28](C(C)C)=[C:29](C(C)C)[C:30]2[C:35]([CH:36]=1)=[CH:34][CH:33]=[CH:32][CH:31]=2)([CH3:26])[CH3:25]>>[CH:24]([C:27]1[CH:28]=[CH:29][C:30]2[C:35](=[CH:34][CH:33]=[C:32]([CH:1]([CH3:10])[CH3:2])[CH:31]=2)[CH:36]=1)([CH3:25])[CH3:26]

参加物

4

反応物 3

HCID 931NaphthaleneHCID 225351-(1-Methylethyl)naphthaleneHCID 185229091,2,3-Tri(propan-2-yl)naphthalene

生成物 1

HCID 322412,6-Diisopropylnaphthalene

実験手順

Substantially pure 2,6-diisopropylnaphthalene can be recovered from the diisopropylnaphthalene products in a multi-stage separation scheme. In one embodiment, the diisopropylnaphthalene product is first fractionally distilled to obtain a low boiling fraction which contains unreacted naphthalene and monoisopropylnaphthalene, a middle fraction containing the diisopropylnaphthalenes, and a high boiling fraction containing triisopropylnaphthalene and tetraisopropylnaphthalenes. 2,6-diisopropylnaphthalene is obtained from the middle fraction by cooling the liquid to a temperature between 0° C. and -20° C. to fractionally crystallize the 2,6-isomer from the other diisopropylnaphthalenes. The mother liquor from the crystallization can be subjected to a second crystallization step, or it can then be combined with the low boiling and high boiling fractions, and subjected to transalkylation before recycle to the alkylation reactor, along with fresh naphthalene.

後処理

  1. customSubstantially pure 2,6-diisopropylnaphthalene can be recovered from the diisopropylnaphthalene products in a multi-stage separation scheme
  2. distillationIn one embodiment, the diisopropylnaphthalene product is first fractionally distilled
  3. customto obtain a low boiling fraction which

出典と根拠

ORDレコード
ord-4638b3330f4240d69a38fbacb4fad492
出典データセット
uspto-grants-1991_06
特許番号
US05026942

反応ノート

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