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Oxychlorination device and method

A hydrogen chloride and oxygen technology, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve the problems of over-proportion increase of by-products, formation of by-products, increase in operating costs, and over-proportion increase, and achieve high purity Effect

Inactive Publication Date: 2008-04-23
VINNOLIT GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A section of the method known from the specification of DE 40 33 048 A1 and the devices associated therewith have the following disadvantages: If the amount of catalyst is increased in order to increase the productivity of the fluidized bed reactor and to increase the EDC output per catalyst amount and time, The over-proportional increase in the ethylene oxidation rate and thus the over-proportional increase in by-products such as carbon monoxide and carbon dioxide
[0006] Therefore, although a section is compact and advantageous in terms of investment cost, it has the disadvantage of higher ethylene loss due to oxidation of ethylene to carbon dioxide and carbon monoxide
Thus, when simultaneously increasing the capacity of an existing stage arrangement, the increase in reactor productivity results in particularly poor ethylene and oxygen yields relative to investment costs
The resulting disadvantage is the formation of by-products and the consequent increase in operating costs

Method used

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  • Oxychlorination device and method
  • Oxychlorination device and method

Examples

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Effect test

Embodiment 1

[0048] 1,2-Dichloroethane was prepared using an oxychlorination reactor 14 with a two-stage fluidized bed 12 using a catalyst of Cu(II)Cl 2 .

[0049] at 35Nm 3 / h cycle gas consumption to operate the equipment. Add 51Nm to the recirculation gas stream 3 / h ethylene that has been preheated to 160°C. The resulting gas mixture flows through distribution plate 29 into the reactor. Through the gas inlet 4 of the first gas distributor 38 located above it, 13.5 Nm 3 / h oxygen and 50Nm 3 / h of a mixture of hydrogen chloride. The starting materials react at 220°C and 0.35MPa to produce 1,2-dichloroethane and water. The reaction heat of this strongly exothermic reaction is discharged to the condensate via the cooling tube bundle 30 . The reaction temperature in the reactor is adjusted by partial evaporation of the condensate in the cooling tube bundle 30 .

[0050] Through the second gas distributor 39 between the first cooling tube bank 30 and the second cooling tube bank 31,...

Embodiment 2

[0071] 1,2-Dichloroethane was prepared using an oxychlorination reactor 1 with a fluidized bed 12, the catalyst used was CuCl 2 .

[0072] at 35Nm 3 / h cycle gas consumption to operate the equipment. Add 28Nm to the recirculation gas stream 3 / h ethylene that has been preheated to 160°C. The resulting gas mixture flows through the distribution plate 29 into the reactor. 27Nm 3 / h of oxygen and 100Nm 3 / h of a mixture of hydrogen chloride. The starting materials react at 220°C and 3.5 bar absolute to form 1,2-dichloroethane and water. The reaction heat of this strongly exothermic reaction is discharged to the condensate via the cooling tube bundle 16 . The reaction temperature in the reactor is adjusted by partial evaporation of the condensate in the cooling tube bundle 30 .

[0073] Through the gas distributor 42 between the first cooling tube bank 30 and the second cooling tube bank 31, feed 23 Nm in the fluidized bed reactor 14 through the gas inlet 7 3 / h of ethyl...

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Abstract

The invention relates to a device (1) which can oxidize and chloridize the olefin into chloralkane through chlorine hydride and oxygen, as well as a method thereof. The device (1) is provided with air inlets (4, 5 and 6) of the fluidized bed (12) which enters into a fluidized bed reactor (14) and includes catalyst grains (13), and at least one reacted air outlet (11) positioned above the fluidized bed (12), and a cooling arrangement (15) which is used for controlling the thermal of the thermal discharge reaction. The plurality of air inlets (4, 5 and 6) which are used for the same inlet air are arranged along the fluidized bed (12) vertically. The cooling arrangement (15) is provided with cooling loops (16, 17 and 18) which are arranged vertically to each other and are inserted into the fluidized bed (12). The device (1) can produce industrial dichloroethane in mass by utilizing the raw material ethylene maximally.

Description

technical field [0001] This invention relates to apparatus and methods for the oxychlorination of alkenes to chlorinated alkanes using hydrogen chloride and oxygen. For this purpose, the device has a gas inlet into the fluidized bed containing catalyst particles of the fluidized bed reactor. Furthermore, the fluidized bed reactor has at least one reaction gas outlet above the fluidized bed and a thermally controlled cooling arrangement for the exothermic oxychlorination reaction. Background technique [0002] Such a device and a process for preparing 1,2-dichloroethane are known from the specification DE 40 33 048 A1. In a known process, hydrogen chloride and oxygen or an oxygen-containing gas such as air are used to react olefins, such as ethylene, with a catalyst consisting of copper(II) chloride on support particles by a stage of oxychlorination according to the following reaction equation In the presence of 1,2-dichloroethane, also known as "EDC", is formed at a temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/156C07C19/01
CPCB01J8/1827C07C17/156B01J2208/00141B01J8/006B01J8/1872
Inventor P·卡默霍费尔K·克雷伊奇
Owner VINNOLIT GMBH & CO KG
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