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Catalyst for producing cycloolefine by partial hydrogenation of mononuclear aromatics, and its preparing method and use

A single-ring aromatic hydrocarbon and catalyst technology, applied in the field of catalysts, can solve problems affecting the stable operation of production equipment, affecting catalyst selectivity, and inability to maximize profits, and achieve the effects of reducing sensitivity, simple adjustment, and thorough reduction

Active Publication Date: 2005-10-05
HENAN SHENMA CATALYTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industrial production is carried out in a state of relatively low activity, high selectivity, or high activity and relatively low selectivity. Through adjustment, the activity or selectivity of the catalyst is increased at the expense of the selectivity or activity of the catalyst, and This kind of adjustment of the activity and selectivity of the catalyst by changing the external conditions is relatively limited, and it is impossible to maximize the output profit according to different production conditions.
Moreover, the catalyst is very sensitive to sulfur compounds, nitrogen-containing compounds, Fe, As, Pb and other elements, and a very small amount can lead to degradation of the catalyst, and some degradation is irreversible. Sulfur compounds will seriously affect the selectivity of the catalyst. Nitrogen-containing compounds, Fe, As, Pb and other elements will cause catalyst deactivation
In the industrial production of Henan Shenma Nylon Co., Ltd. since 1998, catalyst deactivation has occurred many times, and the loss of catalyst is too large, which seriously affects the stable operation of production equipment.

Method used

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  • Catalyst for producing cycloolefine by partial hydrogenation of mononuclear aromatics, and its preparing method and use
  • Catalyst for producing cycloolefine by partial hydrogenation of mononuclear aromatics, and its preparing method and use
  • Catalyst for producing cycloolefine by partial hydrogenation of mononuclear aromatics, and its preparing method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, catalyst preparation: the RuCl of 44.8 grams 3 .3H 2 O and 6.3 g of ZnCl 2 and 1.0 g of H 2 PtCL 6 ·6H 2 Pour O into 600ml of water and stir to dissolve it. 150 ml of 30% aqueous sodium hydroxide solution were added dropwise, and the mixture was stirred at a temperature of 80°C for a further 2 hours. Inject into an autoclave (volume 1000ml) coated with Teflon on the inner surface, fill the kettle with hydrogen, thereby increasing the total pressure in the kettle to 50kg / cm 2 G, reduction at 150°C for 6 hours under high-speed stirring. The reaction mixture was cooled, then washed with water, and then dried in vacuo to obtain 19.8 g of a hydrogenation catalyst. The average crystallite diameter of the catalyst was analyzed by X-ray diffractometer to be 52 Å.

[0026] Catalyst application evaluation: Weigh 1.2 grams of the catalyst, 250ml of water, 50 grams of ZnSO 4 ·7H 2 O, 9.8 g ZrO 2 Put it into an autoclave (internal volume is 1000ml) coated wi...

Embodiment 2

[0027] Embodiment 2, catalyst preparation: the RuCl of 13.3 grams 3 .3H 2 O and 1.7 g of ZnCl 2 and 0.6 g of H 2 PtCL 6 ·6H2 O was poured into 400ml of water and stirred to dissolve it, and 45ml of 30% sodium hydroxide aqueous solution was added dropwise, and the operation was prepared according to Example 1 to obtain 5.83 grams of hydrogenation catalyst. The average crystallite diameter of the catalyst analyzed by X-ray diffractometer was 75 Å.

[0028] Take by weighing 1.9 grams of this catalyst and evaluate the operation according to Example 1, and its performance evaluation results are shown in Table 1.

Embodiment 3

[0029] Embodiment 3, catalyst preparation: the RuCl of 8.8 grams 3 .3H 2 O and 0.7 g of ZnCl 2 and 0.62 g of H 2 PtCL 6 ·6H 2 O was poured into 400ml of water and stirred to dissolve it, and 25ml of 30% sodium hydroxide aqueous solution was added dropwise, and the preparation operation was carried out according to Example 1 to obtain 3.6 grams of hydrogenation catalyst. The average crystallite diameter of the catalyst analyzed by X-ray diffractometer was 93 Å. Weigh 1.0 gram of this catalyst and evaluate the operation according to Example 1, and its performance evaluation results are shown in Table 1.

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Abstract

The present invention discloses a ruthenium base temary series catalyst for preparing cycloalkene by means of monocyclic aromatic hydrocarbon partial hydrogenation, its preparation method and application. Said catalyst is formed from metal ruehtnium and cocatalyst zinc (iron) and platinum, in which the metal ruthenium content is 60-98.9% of total weight, zinc (iron) content is 1-50% of metal ruthenium weight and the platinum content is greater than 0-15% of metal ruthenium weight. Said invented catalyst has high cycloalkane selection rate, high activity, subsidence and higher life.

Description

technical field [0001] The present invention relates to a catalyst for partial hydrogenation of monocyclic aromatic hydrocarbons to produce cycloolefins, its preparation method and application. Background technique [0002] Cycloolefins are widely used as raw materials for lactams, dicarboxylic acid polyamides, and important intermediate raw materials for resins, medicines, and pesticides. Cyclohexene is of high value as an intermediate raw material for many organic chemical industrial products, especially as a raw material for polyamide and lysine. [0003] Compared with the traditional cycloalkanol dehydration method and cycloalkane dehydrogenation method, the method of partial hydrogenation of single-ring aromatics to produce cycloolefins has simple reaction procedures, wide range of raw materials and low cost, and has high economic value. [0004] The partial hydrogenation of single-ring aromatics to produce cycloolefins usually uses ruthenium metal as a catalyst to car...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/60B01J23/89C07C5/11C07C13/20
Inventor 刘木森郑晓广姜继锁梁巍朱江帆吴华文李世强
Owner HENAN SHENMA CATALYTIC TECH CO LTD
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