Method for preparing thin shell hydroxide catalyst

A hydrogen oxidation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Uneven distribution of active components and other problems, to achieve the effect of thin shell thickness and good stability

Active Publication Date: 2007-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that in the process of preparing the hydrogen oxidation catalyst, the thickness of the active thin shell on the outer surface of the catalyst is difficult to control, and the active components are unevenly distributed in the thin shell. Preparation method of oxidation catalyst

Method used

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  • Method for preparing thin shell hydroxide catalyst
  • Method for preparing thin shell hydroxide catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 0.406 g of sodium chloroplatinite and 0.388 g of stannous chloride with 40 ml of absolute ethanol to prepare a platinum-tin complex impregnation solution. Dissolve 0.8 g of sodium hydroxide in 40 ml of deionized water to prepare a precipitant solution. 100 grams of α-Al with a diameter of 4 mm, a length of 5 mm, and a pore volume of 0.4 ml / g 2 o 3 Put the carrier into a rotatable container, add the precipitant solution, roll and dip until the precipitant solution disappears completely, add the prepared platinum-tin complex impregnation solution, keep the internal temperature of the container at 65-75°C, and dip while rolling, until the impregnating solution has completely disappeared. Take out the impregnated catalyst precursor and dry it at 100°C for 2 hours, then put it into a non-metallic container with an inner diameter of 25 mm, feed in a temperature of 400°C, a flow rate of 120 liters / hour of steam and a flow rate of 240 liters / hour Hours of air were h...

Embodiment 2

[0027] The catalyst was prepared according to the method of Example 1, except that 0.406 gram of sodium chloroplatinite and 0.097 gram of stannous chloride were dissolved in 20 milliliters of absolute ethanol to prepare a platinum-tin complex impregnation solution. Dissolve 0.016 g of sodium hydroxide in 40 ml of deionized water to prepare a precipitant solution. The temperature of the hydrothermal treatment is 150° C., the water vapor flow rate is 600 liters / hour, the air flow rate is 60 liters / hour, and the time is 10 hours. The temperature of calcination is 400° C., and the time is 24 hours.

Embodiment 3

[0029]The catalyst was prepared according to the method of Example 1, except that 0.406 gram of sodium chloroplatinite and 1.94 gram of stannous chloride were dissolved in 160 milliliters of absolute ethanol to prepare a platinum-tin complex impregnation solution. Dissolve 8 grams of sodium hydroxide in 40 milliliters of deionized water to prepare a precipitant solution. The temperature of the hydrothermal treatment is 400° C., the water vapor flow rate is 120 liters / hour, the air flow rate is 240 liters / hour, and the time is 2 hours. The temperature of the calcination is 650° C., and the time is 0.5 hour.

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Abstract

The invention relates to a method for preparing surface thin-case catalyst used in ethylbenzene dehydrogenation-hydroxide reaction. Wherein, it uses the IA group alkali metal hydroxide solution as deposit agent to pretreat at least one carrier of alpha- alumina, earth silicon, blue stone, mullite or spinel; then uses Pt-tin complex compound solution as emerge solution to emerge the treated carrier; then heating the catalyst complex compound in water at 150-550Deg. C; and baking it under 400-700Deg. C.

Description

technical field [0001] The invention relates to a preparation method of a thin shell type hydrogen oxidation catalyst. Background technique [0002] Styrene is an important basic organic raw material, mainly used in the production of PS, ABS, SBR, SMA and other materials. At present, the production method of styrene in the world is mainly the catalytic dehydrogenation of ethylbenzene, accounting for about 90% of the production capacity of styrene. [0003] The dehydrogenation of ethylbenzene to styrene is an endothermic reaction in which the number of molecules increases, from a thermodynamic point of view. Reducing the system pressure and increasing the system temperature is beneficial to the reaction. However, due to the limitation of thermodynamic balance and economic rationality, simply increasing the temperature and reducing the pressure cannot meet the requirements. UOP company in the United States has developed a new process of ethylb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J37/02B01J37/00B01J37/10C07C5/333C07C15/46
Inventor 邬时海谢在库缪长喜张惠明顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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