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A catalyst, its preparation and use

A technology of catalysts and compounds, applied in the direction of catalyst activation/preparation, catalysts, carbon compound catalysts, etc., can solve problems such as the performance of dehydrogenation catalysts that are not disclosed

Inactive Publication Date: 2010-01-13
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not disclose a solution to the problem of residual chloride content or the possible negative impact of such residual chloride content on dehydrogenation catalyst performance

Method used

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  • A catalyst, its preparation and use
  • A catalyst, its preparation and use
  • A catalyst, its preparation and use

Examples

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preparation example Construction

[0018] The preparation of the iron halide / metal chloride mixture can be carried out by any method known to those skilled in the art. The iron halide may be mixed or contacted with the metal chloride prior to heating the mixture. In another embodiment, the ferric halide can be mixed with the metal chloride during heating.

[0019] The iron halide / metal chloride mixture comprises at least 0.05 millimoles of metal chloride per mole of iron, preferably at least 0.07 millimoles, more preferably at least 0.1 millimoles, most preferably at least 5 millimoles of metal chloride per mole of iron. The mixture may contain up to 200 mmoles of metal chloride per mole of iron, preferably up to 100 mmoles, more preferably up to 50 mmoles and most preferably up to 30 mmoles per mole of iron.

[0020] In embodiments wherein the mixture comprises titanium, the mixture may comprise from about 0.07 millimoles to about 50 millimoles of titanium per mole of iron. The mixture preferably contains fr...

Embodiment 1

[0057] By adding about 2 moles of CuCl per liter to the pickling waste solution containing about 3.7 moles of iron per liter 2 Copper-doped regenerated iron oxide (doped) samples prepared from aqueous solutions with no CuCl 2 A reference regenerated iron oxide (reference) sample was prepared for comparison. Most iron is FeCl 2 form, and the pickling waste solution contains about 150 g / L of hydrochloric acid. The flow rate of pickling waste liquid added to the spray roaster is about 7.5m 3 / h, and adjust the flow rate of the copper chloride solution to achieve the desired copper concentration in the doped regenerated iron oxide. Due to the volatility of copper chloride, only a portion of the copper remains in the iron oxide. The spray roaster is operated under typical spray roasting conditions known to those skilled in the art. The respective contents of copper and chloride are shown in Table 1 below.

Embodiment 2

[0059] By adding about 2 moles of CeCl per liter to the pickling waste solution containing about 3.7 moles of iron per liter 3 The cerium-doped regenerated iron oxide (doped) samples prepared from the aqueous solution and without CeCl 3 A reference regenerated iron oxide (reference) sample was prepared for comparison. The pickling waste solution was added to the spray roaster as described in Example 1, and the rate of addition of the cerium chloride solution was adjusted to achieve the desired concentration of cerium in the doped regenerated iron oxide. The respective contents of cerium and chloride are shown in Table 1 below.

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Abstract

A process for preparing a catalyst which process comprises preparing a mixture comprising iron oxide and at least one Column 1 metal or compound thereof, wherein the iron oxide is obtained by heating a mixture comprising an iron halide and at least 0.05 millimole of a metal chloride that is converted to a metal oxide under the heating conditions per mole of iron; a catalyst made by the above described process; a process for the dehydrogenation of an alkylaromatic compound which process comprises contacting the alkylaromatic compound with the catalyst; and a method of using an alkenylaromatic compound for making polymers or copolymers, in which the alkenylaromatic compound has been produced by the dehydrogenation process.

Description

technical field [0001] The present invention relates to catalysts, processes for preparing catalysts, processes for the dehydrogenation of alkylaromatic compounds and processes for preparing polymers or copolymers using alkenylaromatic compounds. Background technique [0002] Iron oxide based catalysts and the preparation of these catalysts are known in the art. Iron oxide-based catalysts are commonly used for the dehydrogenation of alkylaromatics to produce the corresponding alkenylaromatics and some other compounds. The dehydrogenation of alkylaromatics is generally carried out on an industrial scale by passing an alkylaromatic feedstock and steam at elevated temperatures through a reaction zone containing a dehydrogenation catalyst. The steam is typically mixed with the alkylaromatic feedstock prior to introducing the steam into contact with the dehydrogenation catalyst in the reaction zone. Steam can be used as both diluent and heat source. As a heat source, steam rai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/85B01J23/887B01J35/02B01J37/08C07C5/333B01J27/132B01J35/10B01J37/00C01B13/34B01J35/00
CPCB01J23/8872C07C2523/83C07C2523/04B01J37/082B01J23/78C07C2523/78B01J35/1066B01J23/83B01J23/8892C07C2523/881B01J35/026B01J37/0009C07C5/3332B01J35/1071B01J23/8873C08F12/08C07C2523/02C01G49/0027B01J27/132B01J35/1009C01P2002/52C07C2523/72C01G49/0036C01B13/34C07C2523/745C07C2523/10B01J35/50B01J35/612B01J35/653B01J35/651B01J35/37B01J35/55C07C15/46B01J27/128B01J37/08C07C5/333
Inventor RM·科瓦尔斯基DM·哈米尔顿
Owner SHELL INT RES MAATSCHAPPIJ BV
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