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Titanate oxide nano catalyst for synthesizing fatty long-chain carbonic dialkyl ester and carbonic diphenyl ester

A technology of dialkyl carbonate and nano-catalyst, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, preparation of organic carbonate, etc., to achieve easy recycling, mild reaction conditions, high Yield and selectivity effects

Inactive Publication Date: 2006-05-24
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of titanium oxide catalysts for the transesterification of dimethyl carbonate (DMC) with aliphatic long-chain alkyl alcohols and phenols.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Under normal pressure, add butanol (22g) and TiO to the reactor 2 ·SrO (30mg), the amount of catalyst is 0.1% of the total weight, put dimethyl carbonate (9g) into a constant pressure dropping funnel, heat in an oil bath, and stir magnetically. The temperature was raised to 100°C, the reaction liquid started to reflux, and the time was counted, and DMC was started to react for 2 hours. The catalyst was separated from the reaction liquid. The reaction liquid chromatography analysis showed that the yield of dibutyl carbonate was 87% and the selectivity was 100.0%.

Embodiment 2

[0023] Under normal pressure, add n-octanol (40g) and TiO to the reactor 2 · ZnO (20mg), the amount of catalyst is 0.04% of the total weight, put dimethyl carbonate (10g) into a constant pressure dropping funnel, heat in an oil bath and stir magnetically. The temperature was raised to 140°C, the reaction solution started to reflux and timed, and DMC was started to react for 4 hours. The catalyst was separated from the reaction liquid, and the reaction liquid chromatographic analysis showed that the yield of di-n-octyl carbonate was 76.0% and the selectivity was 100.0%.

[0024] Catalyst repetition times

Embodiment 3

[0026] Under normal pressure, add isooctyl alcohol (40g) and K to the reactor 2 NO 3 / TiO 3 ·Li 2 O (5mg) and catalyst. The amount of catalyst is 0.01% of the total weight. Put dimethyl carbonate (10g) in a constant pressure dropping funnel, heat in an oil bath and stir magnetically. The temperature was raised to 120°C, the reaction solution started to reflux and timed, and DMC was started to react for 2 hours. The catalyst was separated from the reaction liquid, and the reaction liquid chromatographic analysis showed that the yield of diisooctyl carbonate was 67% and the selectivity was 88%.

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Abstract

The present invention discloses a catalyst for synthesizing aliphatic long-chain dialkyl carbonate and diphenyl carbonate by utilizing dimethyl carbonate ester exchange reaction. Said invention contains some dozens of nano catalysts containing titanate oxide. Said catalyst can shorten the ester exchange reaction time, can raise selectivity for dialkyl carbonate and diphenyl carbonate and can reduce catalyst use level, and its property is stable and reliable in the circulation use process.

Description

Technical field [0001] The invention relates to a nano catalyst for synthesizing aliphatic long-chain dialkyl carbonate with dimethyl carbonate and aliphatic long-chain monohydric alcohol, and synthesizing diphenyl carbonate with dimethyl carbonate and phenol, and particularly relates to a periodic table containing elements The titanate oxide of the element in IA or IIA or IB or IIB or the potassium salt catalyst of the aforementioned titanate oxide as a carrier. It belongs to the field of applied catalysis. Background technique [0002] Aliphatic long-chain dialkyl carbonate is a kind of transparent liquid or oily substance, with low pour point, high thermal oxidation stability and good lubricity, wear resistance, self-cleaning and corrosion resistance. It has good solubility with hydrocarbon oil and is biodegradable. It has special uses, for example, it can be used to synthesize diphenyl carbonate, used as a base material for synthetic lubricants, and can be used in metal degre...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/04C07C68/06C07C69/96
Inventor 王公应冯秀丽王庆印王越曾毅
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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