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Method for preparing 1,2-cyclohexane cyclohexanedimethanol dibasic ester

A technology of cyclohexanedicarboxylic acid dibasic ester and phthalic acid dibasic ester is applied in the field of preparing 1,2-cyclohexanedicarboxylic acid dibasic ester, which can solve problems such as harm to human health and reduce reaction pressure. and energy consumption

Active Publication Date: 2009-04-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But over the years, phthalate dibasic ester PVC plasticizers have received more and more criticisms that they may be harmful to human health in some applications.

Method used

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  • Method for preparing 1,2-cyclohexane cyclohexanedimethanol dibasic ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The catalyst used is Pd-Ru-ZrO 2 / Al 2 o 3 . Catalyst weight composition is: Pt=1%, ZrO 2 =2%, Ru=0.03%, the rest is the carrier Al 2 o 3 . Carrier Al 2 o 3 Using the product Al from Tianjin Research Institute of Chemical Industry 2 o 3 , and the catalyst active component Pd and additives Ru and ZrO were added by conventional impregnation method 2 Carried on the carrier Al 2 o 3 (Al 2 o 3 The particle size is 20-40 mesh). 5.0 grams of catalyst were activated by hydrogen before the reaction, the activation conditions are: GHSV=1200~2400h -1 , Atmospheric pressure ~ 1.0MPa, 200 ~ 400 ℃, reduction time 5 ~ 12 hours. A trickle bed reactor is used. The reaction temperature is 200°C, the hydrogen pressure is 5.0MPa, and the H 2 The / ester molar ratio is 150, and the weight space velocity of diisononyl phthalate is 0.5h -1 , the reaction time is 20h, sampling analysis. The analysis of fatty dibasic acid dibasic esters and phthalic dibasic acid dibasic ester...

Embodiment 2

[0020] The weight space velocity of diisononyl phthalate is 0.3h -1 , other conditions are identical with embodiment 1.

Embodiment 3

[0022] The weight space velocity of diisononyl phthalate is 0.8h -1 , other conditions are identical with embodiment 1.

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Abstract

The invention relates to a method for preparing 1, 2-cyclohexanedicarboxylic acid ester of binary, comprising a reaction system composed by binary phthalate ester, hydrogen and a catalyst; the reaction temperature ranges from 100 to 250 DEG C; the reaction pressure ranges from 3.0 to 12.0 Mpa; the molar ratio of H2 and X ranges from 50 to 450; the liquid space velocity of binary phthalate ester ranges from 0.1 to 2.5 h<-1>; the catalyst uses Al2O3, ZrO2, TiO2 or SiO2-Al2O3 as vehicle, and load active component can be Ru, Pt, Pd, Rh, Fe, Co, Ni and Cu; the binary phthalate ester is diisonynol phthalate, diisooctyl phthalate or dibutyl phthalate; the product 1, 2-cyclohexanedicarboxylic acid ester of binary is 1, 2-cyclohexane diisononyl dimethyl ester, 1, 2-cyclohexane diisooctyl dimethyl ester or 1, 2-cyclohexane dibutyl dimethyl ester.

Description

technical field [0001] The invention relates to a method for preparing 1,2-cyclohexanedicarboxylic acid dibasic ester by hydrogenation of dibasic phthalate, in detail, diisononyl phthalate, diisophthalic acid Long-chain esters such as octyl ester and dibutyl phthalate are hydrogenated into corresponding diisononyl 1,2-cyclohexanedicarboxylate, diisooctyl 1,2-cyclohexanedicarboxylate and 1 , The process of dibutyl 2-cyclohexanedicarboxylate. technical background [0002] Fatty polybasic esters, for example, 1,2-cyclohexane polybasic esters can be used as lubricating oils, auxiliary agents in metal processing, and plasticizers for polyolefins and PVC. At present, PVC plasticizers are mainly dibasic phthalates, such as dibutyl, dioctyl, dinonyl and didecyl. But over the years, phthalate dibasic ester PVC plasticizers have received more and more criticisms that they may be harmful to human health in some applications. Fatty dibasic acid dibasic ester compounds are a class of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/75C07C67/303B01J23/40
Inventor 丁云杰刁成际马立新
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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