Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for producing phosgene

A carbonyl chloride and carbon monoxide technology, applied in the fields of carbonyl chloride, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as excess heat and dissipation, and achieve the effect of reducing corrosion problems and accident risks

Active Publication Date: 2015-03-18
COVESTRO DEUTSCHLAND AG
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For starting material flowing from the bottom into a tube bundle reactor, this is particularly challenging in the area immediately above the bottom tube sheet, where relatively more heat needs to be dissipated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for producing phosgene
  • Device and method for producing phosgene

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0058] Evaporation of Decalin for Cooling a Tube Bundle Reactor to Form Carbonyl Chloride

[0059] The tube bundle reactor has a diameter of 4 m with 8800 reaction tubes. The reaction tube has a length of 4 m and an outer diameter of 30 mm. Overall, 9100 kW of reaction heat had to be dissipated. This was achieved by evaporating 111 t of decalin at 2.3 bar. The mass flow rate of the internal circulation is about 4300 t / h. In the attached condenser, 17 t / h of steam are produced at 21 bar.

example 2

[0061] Evaporation of water used to cool tube bundle reactors for the formation of phosgene

[0062] The tube bundle reactor has a diameter of 3.8 m with 1900 reaction tubes. The reaction tube has a length of 4 m and an outer diameter of 60.3 mm. Overall, 5500 kW of reaction heat must be dissipated. This was achieved by evaporating 18.4 t of water at 250 mbar. The mass flow rate of the internal circulation is about 2400 t / h.

[0063] List of Reference Numbers

[0064] 1) Bottom tube sheet

[0065] 2) Top tube plate

[0066] 3) Reaction tube

[0067] 4) Reactor shell

[0068] 5) Steam belt

[0069] 6) Down tube

[0070] 7) Annular plate

[0071] 8) Outlet opening

[0072] 9) Inlet opening

[0073] 10) Cooling fluid channel

[0074] 11) Narrow part

[0075] 12) Inner annular space

[0076] 13) Outer ring space

[0077] 14) Phase boundary of liquid cooling fluid

[0078] 15) Tube bundle part

[0079] a) Direction of flow of reactants and products

[0080] b-k) ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a device (R) for producing phosgene by reacting chlorine and carbon monoxide in the presence of a fixed-bed catalyst, comprising a) a tube bundle, which is arranged inside a reactor jacket (4) and which has a plurality of reaction tubes (3), which are arranged substantially parallel to each other and which extend from a lower tube sheet (1) to an upper tube sheet (2), and b) a coolant space for a cooling fluid, which coolant space surrounds the reaction tubes (3) and is defined by the lower tube sheet (1), the upper tube sheet (2), and the reactor jacket (4), wherein the device is characterized in that the tube bundle is enclosed by an annular-space sheet (7), which defines an inner annular space (12) for the passage of the cooling fluid and which is arranged at a distance from both the lower tube sheet (1) and the upper tube sheet (2), wherein an outer annular space (13) for feeding liquid cooling fluid through is formed between the annular-space sheet (7) and the reactor jacket (4), which outer annular space is in fluid connection with the inner annular space (12). The invention further relates to a method for producing phosgene by means of such a device.

Description

technical field [0001] The invention relates to a plant for producing phosgene by reaction of chlorine and carbon monoxide in the presence of a fixed bed catalyst, said plant comprising a tube bundle and a coolant chamber for a cooling fluid, said tube bundle being arranged in a reactor shell There are a plurality of reaction tubes in the body, the plurality of reaction tubes are arranged substantially parallel to each other and extend from the bottom tube sheet to the top tube sheet, the coolant chamber surrounds the reaction tubes and is composed of the bottom tube sheet, the top tube sheet A tube sheet is bounded by the reactor shell. The present invention also relates to a method for producing phosgene by means of the above-mentioned device. Background technique [0002] The prior art is known for the large-scale production of phosgene from CO and chlorine over activated carbon catalysts in tube bundle reactors (eg Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/28B01J8/06C01B32/80
CPCB01J2208/00221B01J2208/00176C01B31/28B01J8/067C01B32/80B01J2208/021
Inventor U.霍尔曼F.斯蒂芬斯W.洛伦茨T.鲁诺夫斯基
Owner COVESTRO DEUTSCHLAND AG