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Reproduction method for synthesizing carbonic allyl(ethene) ester by carbamide and propylene(ethylene) glycol

A catalyst and urea technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as industrial pollution, high energy consumption, troublesome treatment of waste acid, etc., and restore catalytic activity , the effect of less energy consumption

Inactive Publication Date: 2006-04-26
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes a lot of energy; when the metal is separated from the carrier, a large amount of waste acid is generated, which can cause industrial pollution, and the disposal of the waste acid is even more troublesome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: Using urea and propylene (ethylene) glycol to synthesize propylene (ethylene) carbonate, connect a centrifugal separator at the outlet of the reactor, and connect 100 grams of waste catalyst separated by the centrifugal separator. The separated catalyst was put into 300 g of organic solvent methanol, stirred and washed, the temperature was 40°C, and the stirring time was 10 minutes. Filter paper. Then 100 grams of methanol was used to wash the catalyst on the filter paper. Put the filtered catalyst into a drying box with a controlled temperature of 80-90°C for about 2 hours. Put the dried catalyst into a porcelain crucible, and put it into a muffle furnace for roasting, the roasting temperature is 500°C, and the roasting time is 4 hours. The porcelain crucible was taken out and cooled to room temperature to obtain a regenerated urea and propylene (ethylene) glycol to synthesize propylene (vinyl) carbonate catalyst. The regenerated catalyst is numbered 1. The sele...

Embodiment 2

[0010] Example 2: Regenerated catalyst No. 1 is used as a catalyst for the synthesis of propylene carbonate from urea and propylene (ethylene) glycol. 70 grams of spent catalyst separated by centrifugal separator. The separated catalyst was put into 200 g of organic solvent absolute ethanol, and washed with stirring, at a temperature of 50° C., and stirring for 20 minutes. Filter paper. Then 30 g of absolute ethanol was used to wash the catalyst on the filter paper. Put the filtered catalyst into a drying box with a controlled temperature of 60-80°C for about 3 hours. Put the dried catalyst into a porcelain crucible, and put it into a muffle furnace for roasting, the roasting temperature is 600 DEG C, and the roasting time is 6 hours. The porcelain crucible was taken out and cooled to room temperature to obtain a regenerated urea and propylene (ethylene) glycol to synthesize propylene (vinyl) carbonate catalyst, which was designated as No. 2 regenerated catalyst. The selectivity o...

Embodiment 3

[0011] Example 3: Regenerated catalyst No. 2 is used as the catalyst for the synthesis of propylene carbonate from urea and propylene (ethylene) glycol. 50 grams of spent catalyst separated by centrifugal separator. Put the separated catalyst into 150 g of organic solvent benzene, stir and wash, the temperature is 50 DEG C, and the stirring time is 10 minutes. Filter paper. Then 50 grams of benzene was used to wash the catalyst on the filter paper. Put the filtered catalyst into a drying box with a controlled temperature of 70-80°C for about 2 hours. Put the dried catalyst into a porcelain crucible, and put it into a muffle furnace for roasting, the roasting temperature is 750°C, and the roasting time is 5 hours. The porcelain crucible was taken out and cooled to room temperature to obtain the regenerated urea and propylene (ethylene) glycol to synthesize propylene (vinyl) carbonate catalyst, which was numbered as No. 3 regenerated catalyst. The selectivity of the regenerated No. ...

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PUM

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Abstract

This invention relates to a regenerating method for compounding propylene carbonate catalyst with aquacare and methyl ethylene glycol, which comprises the following steps: a, separating the catalyst with the centrifuge; b, scouring with the organic solvent, filtering and drying; c, baking the dried catalyst in the cave, then can get the regenerated catalyst. This invention can preserve and improve the present crystallization shape of the catalyst without destroying the catalyst structure, recovering its catalyst effort. The effective component of the catalyst is not separate with the carrier, and does not create acid pickle.

Description

Technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a catalyst regeneration method. Specifically, it is the regeneration method of the catalyst for synthesizing propylene (ethylene) carbonate with urea and propylene (ethylene) glycol. It mainly adopts organic solvent washing; drying and roasting methods to keep the original crystal form of the catalyst for the synthesis of propylene (ethylene) carbonate from urea and propylene (ethylene) glycol and restore its catalytic activity. Background technique [0002] Chinese patent CN1114362A discloses a method for recovering platinum from spent catalyst. It is a method of extracting platinum metal from spent catalyst. The main method is to first separate the metallic platinum carried on the carrier from the carrier; secondly, to extract the platinum from the separated metal solution. The specific method disclosed is: firstly, the spent catalyst is roasted at 800-1200°C for 4-10 hou...

Claims

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Application Information

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IPC IPC(8): B01J38/02B01J38/50C07C68/00C07C69/96
CPCY02P20/584
Inventor 陈蓝天龚涛展江宏徐新良魏伟赵宁
Owner PETROCHINA CO LTD
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