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Method for preparing environment-friendly plasticizer cyclohexane dicarboxylic acid ester

A technology of cyclohexanedicarboxylate and environmentally friendly plasticizer, which is applied in the direction of carboxylate preparation, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of high reaction pressure, low conversion rate or selectivity, Solve the problems of high hydrogen consumption and achieve the effect of reducing hydrogen consumption, expanding the range of types, and reducing reaction energy consumption

Inactive Publication Date: 2013-09-18
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current technology has shortcomings such as high reaction pressure, high hydrogen consumption, low conversion rate or selectivity of the reaction, etc.

Method used

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  • Method for preparing environment-friendly plasticizer cyclohexane dicarboxylic acid ester

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The catalyst used is Pd-Ru / SiO 2 -Al 2 o 3 . The weight composition of the catalyst is: Pd=0.1%, Ru=0.2%, and the rest is carrier SiO 2 -Al 2 o 3 . The catalyst active components Pd and Ru were supported on the carrier SiO by conventional impregnation method. 2 -Al 2 o 3 superior.

[0019] 10 grams of catalyst is activated by hydrogen before the reaction, the activation conditions are: GHSV=1000~2000h -1 , Atmospheric pressure ~1.0MPa, 200~300℃, reduction time 1~5 hours. Choose a fixed bed reactor.

[0020] The reaction temperature is 140°C, the hydrogen pressure is 15MPa, and the H 2 The / ester molar ratio is 15, and the volumetric space velocity of diisodecyl phthalate is 0.4h -1 , Reaction time 24h, sampling analysis.

[0021] The analysis of products and raw materials adopts gas chromatography, and the specific conditions are: nitrogen is the carrier gas, the flow rate is 1.5mL / min., and the injection volume is 4 microliters; FID hydrogen flame ion det...

Embodiment 2

[0023] The volume space velocity of diisodecyl phthalate is 0.3h -1 , other conditions are identical with embodiment 1.

Embodiment 3

[0025] The volume space velocity of diisodecyl phthalate is 0.5h -1 , other conditions are identical with embodiment 1.

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Abstract

The invention relates to a method for preparing an environment-friendly plasticizer cyclohexane dicarboxylic acid ester. The method is characterized in that the reaction system includes phthalic acid diester, hydrogen and a catalyst, the reaction conditions are as follows: the mole ratio of H2 to phthalic acid diester is (30-5):1, the reaction temperature is 100-250 DEG C, the reaction pressure is 5-18MPa, and the liquid airspeed of the phthalic acid diester is 0.1-2.5h<-1>; and in the catalyst, Al2O3-SiO2 is taken as a carrier, active compositions are selected from one or more of Ru, Pd and Ni, and the loading capacity of the active ingredients is 0.05-3% of the weight of the catalyst.

Description

technical field [0001] The invention relates to the technical field of environmentally friendly plasticizers, in particular to a method for preparing environmentally friendly plasticizer cyclohexanedicarboxylate, which refers to the hydrogenation conversion of dialkyl phthalate into 1,2-cyclohexane Process of dialkyl alkane dicarboxylates. Background technique [0002] Plasticizer is one of the plastic additives with the largest production and consumption in the world, and plays an indispensable role in providing high-quality plastic products for human beings. At present, domestic plasticizers are mainly phthalate plasticizers, which account for nearly 90% of the total consumption in actual consumption. Its toxicity is also getting more and more attention. Due to its potential carcinogenicity, many countries have established strict regulations on the use of phthalate plasticizers. According to reports, the compounding properties of ring-hydrogenated phthalates and resins s...

Claims

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Application Information

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IPC IPC(8): C07C69/75C07C67/303C08K5/12
Inventor 李孝国赵甲于海斌费亚南孙国方李佳肖寒
Owner CHINA NAT OFFSHORE OIL CORP
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