EP1399252A1 - Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique - Google Patents

Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique

Info

Publication number
EP1399252A1
EP1399252A1 EP02771653A EP02771653A EP1399252A1 EP 1399252 A1 EP1399252 A1 EP 1399252A1 EP 02771653 A EP02771653 A EP 02771653A EP 02771653 A EP02771653 A EP 02771653A EP 1399252 A1 EP1399252 A1 EP 1399252A1
Authority
EP
European Patent Office
Prior art keywords
layer
packing
pack
packing layer
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP02771653A
Other languages
German (de)
English (en)
Inventor
Eckhard Ströfer
Gerd Kaibel
Achim Stammer
Carsten Oost
Martin Sohn
Manfred Stroezel
Walter Dobler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1399252A1 publication Critical patent/EP1399252A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/009—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in combination with chemical reactions
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/3221—Corrugated sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32213—Plurality of essentially parallel sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32224—Sheets characterised by the orientation of the sheet
    • B01J2219/32227—Vertical orientation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32255—Other details of the sheets
    • B01J2219/32258—Details relating to the extremities of the sheets, such as a change in corrugation geometry or sawtooth edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32265—Sheets characterised by the orientation of blocks of sheets
    • B01J2219/32272—Sheets characterised by the orientation of blocks of sheets relating to blocks in superimposed layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32408—Metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/33—Details relating to the packing elements in general
    • B01J2219/3306—Dimensions or size aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/332—Details relating to the flow of the phases
    • B01J2219/3325—Counter-current flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/06—Reactor-distillation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/11—Batch distillation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/72—Packing elements

Definitions

  • Bottom and packing columns are used in technology for the exchange of heat and matter between liquid and gaseous media, in particular for the separation of mixtures of substances by distillation.
  • the two designs differ with regard to the hydrodynamic operating conditions.
  • the operating mode of packed columns differs from that of the bottom columns in terms of hydrodynamics. Here it is not the liquid but the gas that forms the continuous phase.
  • the liquid runs down as a film over the packs.
  • Ordered packs are made up of a large number of individual layers of packing elements, such as sheets, expanded metals and wire mesh, which are arranged vertically to one another in a regular structure and are usually held together in a composite by fasteners such as metal wires, thin metal bars or sheet metal strips.
  • packing elements themselves have a geometric structure, for example in the form of kinks or circular holes with a diameter of approximately 4 to 6 mm. The openings serve to raise the flood limit of the packing and to allow a higher column load. Examples are packs of the types "Mellapak", CY and BX from Sulzer AG, CH-8404 Winterthur, or the types A3, BSH or BL from Montz GmbH, D-40723 Hilden.
  • the kinks of the pack elements of these packs run in a straight line and inclined at an angle of about 30 ° to 45 ° to the longitudinal axis of the package.
  • the kinks of the package elements result in a cross-channel structure within the ordered package.
  • DE-A 196 05 286 describes a special development in which this angle is further reduced to values from 3 ° to 14 ° in order to reduce the pressure loss of the packs as much as possible in applications in a high vacuum (approx. 1 mbar head pressure).
  • the object of the invention is therefore to provide a process for the distillation or reactive distillation of a mixture which contains at least one toxic component, in which the amount of toxic substances in the column is reduced compared to known processes with the same throughput and the same separation performance.
  • the solution is based on a process for the distillation or reactive distillation of a mixture which contains at least one toxic component.
  • the invention is characterized in that the process is carried out in a column with an ordered packing, comprising at least one packing layer with a lower end and an upper end, the packing layer having an internal geometry which varies over its height, such that during the distillation or reactive distillation in a first, lower area of the pack layer with a predominantly fizzy layer disperse gas phase and at the same time a film flow with a predominantly continuous gas phase can be set in a second, upper region of the packing layer.
  • the minimization of the amounts of toxic substances in the column is achieved by using ordered packings with an internal geometry that varies over the height of the packing layers. Due to the special shape, the pack can be operated through targeted measures in an area in which the liquid forms the continuous phase in defined partial areas and the disperse phase in other partial areas.
  • hydrodynamic operating states can be achieved in particular by designing the packing layer with varying flow resistance over its height, the lower region of the packing layer having a greater resistance than the upper region of the packing layer.
  • the lower and the upper region preferably each extend over the entire cross-sectional area of the packing layer.
  • An orderly pack is preferably used in which the pack layer has touching, flat pack elements, in particular kinked sheets, expanded metals, wire mesh or knitted fabrics, the crease line varying over the height of the pack layer in such a way that it forms a larger angle in the lower region of the pack layer
  • the longitudinal axis of the pack layer forms as in the upper region of the pack layer.
  • packing elements with a kink line which has an arcuate course, in particular such that the angle between the tangent to the kink line and the longitudinal axis of the packing layer is approximately 45 to 75 °, preferably 60 to 70 ° in the lower
  • the area of the pack layer is reduced to 10 to 45 °, preferably 30 to 45 ° in the upper area of the pack layer.
  • This arcuate course of the kink line is particularly easy to manufacture and therefore economical to manufacture.
  • the packing layer has packing elements
  • at least some of the packing elements at the middle end and / or upper end of the packing layer are bent in a flap-like manner.
  • the packing elements preferably have incisions at the lower end and / or the upper end of the packing layer at defined intervals, which preferably correspond to approximately half the crease width, so that tabs can be bent in different directions.
  • the tabs are particularly preferably bent alternately to both sides of the packing element.
  • the depth of the incisions is preferably 3 to 8 mm.
  • the angle which the bent tabs form with the packing element is preferably about 110 to 150 °, so that the tabs in the packing layer are aligned approximately horizontally.
  • the lateral extension of the tabs is chosen so that about 30 to 60% of the flow cross section are blocked.
  • only every second consecutive packing element is bent sideways in order to ensure sufficient mechanical stability of the stacked packing layers.
  • the first pack layer is arranged below the second pack layer.
  • the first and the second pack layer are particularly preferably arranged directly on top of one another, the first pack layer forming the lower and the second pack layer forming the upper partial pack layer.
  • the partial pack layers are preferably designed so that their internal geometry does not vary over their height.
  • the first lower partial pack layer preferably has a height of 0.02 to 0.10 m and particularly preferably 0.03 to 0.05 m.
  • the second upper partial pack layer preferably has a height of 0.05 to 0.2 m, particularly preferably 0.10 to 0.15 m.
  • the flow resistance of the first subpackage layer per meter height is preferably about 1.2 to about 5 times, particularly preferably about 1.5 to about 2.5 times, as high as the flow resistance of the second subpackage layer.
  • the flow resistance of the partial packing layers can be adjusted by the angle which the kink courses or tangents form to the kink courses with the longitudinal axis of the pack layers. The larger this angle, the higher the flow resistance.
  • the partial pack layers are composed of packing elements with kinks, the kink curves or tangents to the kink curves of the first partial pack layer forming a larger angle with the longitudinal axis of the pack layer than the kink curves or tangents of the kink curves of the second subpackage layer. Preferred angles have already been mentioned above, to which reference is made here.
  • the flow resistance of the partial packing layers can also be achieved by the size of the specific surface area per volume.
  • the partial pack layers preferably have different specific surfaces per volume.
  • the first lower partial pack layer particularly preferably has a higher specific surface area per volume than the second upper partial pack layer.
  • the specific surface area of the first lower partial pack layer is preferably 20 to 100%, particularly preferably 30 to 60%, larger than that of the second upper pack layer.
  • the amount of toxic substances in the column can be reduced further by integrating the condenser at the top of the column into the column. This further reduces the liquid holdup. With this measure, one can fall back on designs which are common in distillation technology and have been tried and tested in use.
  • FIG. 4 shows a detail of a packing element 4 of a packing layer 1 of an embodiment of an ordered packing with laterally bent
  • Fig. 6 shows a further embodiment of the ordered pack with a pack layer 1, which is formed from two partial pack layers of different internal geometry and
  • the pack layer 1 shows a pack layer 1 of an embodiment of an ordered pack according to the present invention.
  • the pack layer 1 has a first, lower end 2 and a second, upper end 3. It has a height H of, for example, 0.2 m.
  • the packing layer has touching, flat packing elements 4 made of sheets provided with kinks (not shown).
  • the reference number 5 shows the longitudinal axis of the packing layer 1.
  • the packing layer 1 furthermore has a circular cross section.
  • the inner geometry of the pack layer 1 varies over its height (not shown).
  • the pack layer 1 has a first, lower area 6, the inner geometry of which differs from a second, upper area 7.
  • the first, lower area 6 of the packing layer 1 has a greater flow resistance than the second, upper area 7.
  • the first, lower area 6 of the pack layer 1 and the second, upper area 7 of the pack layer 1 extend over the entire cross-sectional area of the pack layer 1.
  • the first, lower area 6 directly adjoins the second, upper area 7.
  • the second, upper area 7 of the pack layer 1 is adjacent to the second, upper end 3 of the pack layer 1 and the first, lower area 6 is adjacent to the first, lower end 2 of the pack layer 1.
  • FIGS. 2 and 3 each schematically show packing elements 4 of a packing layer 1 of different embodiments of the ordered packing according to the present invention.
  • the solid lines show the kink profiles of the first, third, fifth, etc. packing element 4 and the dashed lines show the kink profiles of the second, fourth, sixth, etc. packing element 4.
  • the packing elements 4 in FIG. 2 have the same height H of, for example, 0.2 m as the packing layer 1.
  • the packing elements 4 consist of metal sheets with kinks 8, as a result of which the packing layer 1, which is composed of these packing elements, is given a cross-channel structure.
  • the kinks 8 have a straight line in sections.
  • the kink profiles form a larger angle ⁇ with the longitudinal axis 5 of the pack layer 1 than in the second, upper area 7 of the pack layer 1.
  • the kink profiles form one Angle ⁇ of approximately 60 ° with the longitudinal axis 5 of the package layer 1.
  • the kink profiles form an angle ⁇ of approximately 30 ° with the longitudinal axis 5 of the package layer 1.
  • the packing elements 4 have kinks 8 with continuously curved kink profiles.
  • the packing elements 4 have the same height H of, for example, 0.2 m as the packing layer 1.
  • the tangents to the kink profiles form a larger angle in the first, lower area 6 of the packing layer 1 with the longitudinal axis 5 of the packing layer 1 than in the second, upper one Area 7 of the pack layer 1.
  • the tangents to the bend courses form an angle of approximately 45 ° to approximately 75 ° with the longitudinal axis 5 of the pack layer 1.
  • the tangents form an angle ⁇ of about 10 ° to 45 ° with the longitudinal axis 5 of the packing layer at the kink curves.
  • the kinks 8 have an approximately parabolic shape.
  • the packing element 4 shows a three-dimensional view of a section of a packing element 4 of a further embodiment of the packing according to the invention.
  • the packing element 4 has kinks 8 with a straight course in the cutout shown.
  • the reference number 5 denotes the longitudinal axis of the packing layer 1, in which the packing element 4 shown is arranged.
  • the lateral extension of the tabs is chosen so that about 30 to 60% of the flow cross section are blocked.
  • the packing elements 4 show packing elements 4 of a packing layer 1 of a further embodiment of the ordered packing arranged one behind the other.
  • the solid lines show the kink profiles of the first, third, fifth, etc. packing element 4 and the dashed lines show the kink profiles of the second, fourth, etc. packing element 4.
  • the packing elements 4 have the same height H of, for example, 0.2 m as the packing layer 1.
  • the packing elements 4 have straight folds 8.
  • the reference number 5 denotes the longitudinal axis of the packing layer 1.
  • 4 thin metal sheet strips 15 are arranged between the packing elements.
  • the metal sheet strips connect directly to the lower end 2 of the pack layer 1.
  • the strips are flat and preferably have a height H of approximately 15 to 25 mm.
  • the pack layer 1 shows a pack layer 1 of an embodiment of the ordered pack according to the invention in longitudinal section.
  • the pack layer 1 consists of two superimposed subpackage layers, a first subpackage layer 10 and a second subpackage layer 11. Both subpackage layers 10, 11 together form the height H of the pack layer 1.
  • the first subpackage layer 10 forms the lower subpackage layer and the second subpackage layer 11 the upper subpackage layer ,
  • the first partial pack layer 10 forms the first, lower area 6 of the pack layer 1, the second partial pack layer 11 the second, upper area 7 of the pack layer 1.
  • Both partial pack layers consist of a plurality of packing elements 4 arranged side by side or one behind the other.
  • the packing elements 4 of the partial packing layers 10, 11 consist of sheet metal and have kinks 8 that run in a straight line.
  • the solid lines show the kink profiles of the first, third, fifth etc. packing element 4 and the dashed lines show the kink profiles of the second, fourth, sixth etc. packing element 4.
  • the kink profiles form with the longitudinal axis 5 of the Pack layer 1 in the first partial pack layer 10 has an angle ⁇ which is greater than that which the kink curves form in the second partial pack layer 11 with the longitudinal axis 5.
  • the kink profiles form an angle ⁇ of approximately 60 ° with the longitudinal axis of the packing layer 1.
  • the kink profiles form an angle ⁇ of approximately 30 ° with the longitudinal axis of the packaging layer 1.
  • the first subpackaging layer 10 thereby has a greater flow resistance than the second partial pack layer 11.
  • the first partial pack layer 10 preferably has a height of 0.02 to 0.10 m, particularly preferably 0.03 to 0.05 m.
  • FIG. 7 shows, like FIG. 6, an embodiment of the ordered packing according to the invention in longitudinal section, with a packing layer 1, which consists of two partial packing layers 10, 11.
  • the two embodiments of FIGS. 6 and 7 are essentially the same.
  • the same reference numbers denote the same parts. In this respect, reference is made to the comments on FIG. 6.
  • the kink profiles of the present embodiment of FIG. 7 in the first and second partial package layers 10, 11 form the same angle ⁇ with the longitudinal axis 5 of the package layer 1.
  • the lower partial package layer 10 has a 50 % higher specific surface area than the upper partial pack layer 11. As a result, the flow resistance in the first, lower partial pack layer 10 is greater than in the second, upper partial pack layer 11.
  • a bubble layer with a predominantly disperse gas phase is formed in the first, lower area 6 of the packing layer 1 and simultaneously in the second, upper one Area 7 of the pack layer 1 specifically targets a film flow of the liquid with a predominantly continuous gas phase.
  • a metal column made of stainless steel with an inner diameter of 0.1 m and a total height of 6.2 m was used as the test column. It was equipped with tidy metal packs in a cross-channel structure, the Column packings alternately had different specific surface areas.
  • the packs were each composed of a 0.035 m high layer with a specific surface area of 500m 2 / m 3 (type Montz B 1-500) and a 0.195 m high layer with a specific surface area of 250 m 2 / m 3 (type Montz B 1-250).
  • the inclination of the kinks against the longitudinal axis of the column was in each case 45 ° against the horizontal in both types of packing.
  • Both the low and the high packs were equipped with liquid wipers made of wire mesh on their circumference in order to prevent the liquid from getting into the edges.
  • the low tin packs had circular perforations with a diameter of 4 mm.
  • a total of 0.92 m packings were installed in the rectifying section of the column.
  • the stripping section of the column had a packing height of 2.07 m.
  • a collecting tray was attached to the feed point of the column. The incoming liquid was placed on the collecting tray and from there it reached a connected natural circulation evaporator, which served as an intermediate evaporator.
  • the gas / liquid mixture emerging from this evaporator was placed on a second collecting tray below the collecting tray. The liquid on this bottom was also added to the evaporator.
  • the feed mixture consisted essentially of the components toluene diisocyanate (TDI) (6.4%), hydrogen chloride (1.1%), phosgene (13.6%), monochlorobenzene (66.4%) and higher-boiling by-products (12.5% ) and was fed into the column in a stream of 374 kg / h at a temperature of about 101 ° C.
  • the column was operated under a pressure of 2.65 bar (column head).
  • the heating power at the bottom of the column was adjusted so that a temperature of 166 ° C. resulted at the bottom of the column.
  • the heating power of the intermediate evaporator in the area of the feed point was adjusted so that the temperature in the uppermost packing layer of the stripping section was 94 ° C.
  • the column was operated in the stripping section with a gas loading factor F factor of 1.7 (Pas) 0 ' 5 .
  • the packs used in the pilot plant are scalable and can be used in the same design and load in a production plant. As a safety surcharge, the pack height for a large system is increased from 2.07 to 3 m. On the other hand, in comparable production systems, 15 valve bottoms must currently be used in the stripping section, which, with a floor clearance of 0.4 m, have a height of 6 m.
  • the soils are operated with an F factor of about 0.9 (Pas) 0 ' 5 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'invention concerne un procédé de distillation ou de distillation réactive d'un mélange contenant au moins un constituant toxique. Ledit procédé est mis en oeuvre dans une colonne munie d'une garniture ordonnée, présentant au moins une couche de garniture (1) avec une extrémité inférieure (2) et une extrémité supérieure (3). La couche de garniture présente une géométrie intérieure variable sur toute sa hauteur, de sorte à pouvoir ajuster, lors de la distillation ou de la distillation réactive, dans une première zone inférieure (6) de la couche de garniture (1), de manière ciblée une couche bouillonnante à phase gazeuse essentiellement dispersée et simultanément dans une seconde zone supérieure (7) de la couche de garniture (1), un écoulement pelliculaire à phase gazeuse sensiblement continue.
EP02771653A 2001-05-18 2002-05-17 Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique Ceased EP1399252A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124386 2001-05-18
DE10124386A DE10124386A1 (de) 2001-05-18 2001-05-18 Verfahren zur Destillation oder Reaktivdestillation eines Gemisches, das mindestens eine toxische Komponente enthält
PCT/EP2002/005517 WO2002094432A1 (fr) 2001-05-18 2002-05-17 Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique

Publications (1)

Publication Number Publication Date
EP1399252A1 true EP1399252A1 (fr) 2004-03-24

Family

ID=7685363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02771653A Ceased EP1399252A1 (fr) 2001-05-18 2002-05-17 Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique

Country Status (7)

Country Link
US (1) US7431804B2 (fr)
EP (1) EP1399252A1 (fr)
JP (1) JP2004534636A (fr)
KR (1) KR100871948B1 (fr)
CN (1) CN1229177C (fr)
DE (1) DE10124386A1 (fr)
WO (1) WO2002094432A1 (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA200800129A1 (ru) * 2003-11-20 2008-04-28 Солвей (Сосьете Аноним) Псевдоазеотропная композиция, содержащая дихлорпропанол, и способ ее получения
DE102004056419A1 (de) * 2004-11-23 2006-05-24 Julius Montz Gmbh Geordnete Packung für Wärme und/oder Stoffaustausch
FR2881732B1 (fr) * 2005-02-08 2007-11-02 Solvay Procede pour la purification de chlorure d'hydrogene
US8067645B2 (en) 2005-05-20 2011-11-29 Solvay (Societe Anonyme) Process for producing a chlorhydrin from a multihydroxylated aliphatic hydrocarbon and/or ester thereof in the presence of metal salts
TWI320036B (en) * 2005-05-20 2010-02-01 Process for preparing a chlorohydrin starting from a polyhydroxylated aliphatic hydrocarbon
US7267329B2 (en) * 2005-07-27 2007-09-11 Air Products And Chemicals, Inc. Alternating conventional and high capacity packing within the same section of an exchange column
AR057255A1 (es) * 2005-11-08 2007-11-28 Solvay Proceso para la elaboracion de dicloropropanol por cloracion de glicerol
CA2654717A1 (fr) * 2006-06-14 2007-12-21 Solvay (Societe Anonyme) Produit a base de glycerol brut, procede pour sa purification et son utilisation dans la fabrication de dichloropropanol
US20100032617A1 (en) * 2007-02-20 2010-02-11 Solvay (Societe Anonyme) Process for manufacturing epichlorohydrin
FR2913421B1 (fr) * 2007-03-07 2009-05-15 Solvay Procede de fabrication de dichloropropanol.
FR2913684B1 (fr) 2007-03-14 2012-09-14 Solvay Procede de fabrication de dichloropropanol
TW200911740A (en) 2007-06-01 2009-03-16 Solvay Process for manufacturing a chlorohydrin
TW200911693A (en) * 2007-06-12 2009-03-16 Solvay Aqueous composition containing a salt, manufacturing process and use
TW200911773A (en) * 2007-06-12 2009-03-16 Solvay Epichlorohydrin, manufacturing process and use
EP2207617A1 (fr) * 2007-10-02 2010-07-21 SOLVAY (Société Anonyme) Utilisation de compositions contenant du silicium pour améliorer la résistance à la corrosion de récipients
FR2925045B1 (fr) 2007-12-17 2012-02-24 Solvay Produit a base de glycerol, procede pour son obtention et son utilisation dans la fabrication de dichloropropanol
TWI478875B (zh) * 2008-01-31 2015-04-01 Solvay 使水性組成物中之有機物質降解之方法
WO2009121853A1 (fr) 2008-04-03 2009-10-08 Solvay (Société Anonyme) Composition comprenant du glycérol, son procédé d'obtention et son utilisation dans la fabrication de dichloropropanol
FR2929532B1 (fr) * 2008-04-07 2010-12-31 Air Liquide Colonne a garnissage d'echange de chaleur et/ou matiere
FR2935968B1 (fr) 2008-09-12 2010-09-10 Solvay Procede pour la purification de chlorure d'hydrogene
US20110206569A1 (en) * 2008-10-31 2011-08-25 Basf Se Ion exchanger moulded body and method for producing same
FR2939434B1 (fr) * 2008-12-08 2012-05-18 Solvay Procede de traitement de glycerol.
EP2269728B1 (fr) 2009-06-09 2018-01-31 Basf Se Utilisation d'emballages ordonnés comportant une ou plusieurs positions d'empilement et une ou plusieurs positions de séparation
KR20140009163A (ko) 2010-09-30 2014-01-22 솔베이(소시에떼아노님) 천연유래 에피클로로히드린의 유도체
DE102010056023A1 (de) * 2010-12-23 2012-06-28 Linde Aktiengesellschaft Kolonne
CN111659149B (zh) * 2020-06-16 2021-10-08 上海化工研究院有限公司 精馏塔、精馏系统及其用途

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE526480A (fr) 1953-02-27
EP0054634A1 (fr) 1980-12-23 1982-06-30 Hüls Troisdorf Aktiengesellschaft Procédé pour la préparation par rectification d'alkylaromatiques purs à chaînes latérales chlorées
US4604247A (en) * 1983-06-21 1986-08-05 Glitsch, Inc. Tower packing material and method
DE4231417A1 (de) * 1992-05-05 1993-11-11 Huels Chemische Werke Ag Kontinuierliches mehrstufiges Verfahren zur Herstellung von (cyclo)aliphatischen Diisocyanaten
CN1091646C (zh) * 1994-10-04 2002-10-02 普莱克斯技术有限公司 用于精炼系统的高容量结构填料
DE19605286A1 (de) 1996-02-13 1997-08-14 Basf Ag Druckverlustarme Gewebepackungen oder gewebeähnliche Packungen mit geordneter Struktur zur Verwendung in Stoffaustauschkolonnen
ES2138358T3 (es) * 1995-07-08 2000-01-01 Basf Ag Empaquetaduras de material de tejido o de material similar al tejido con poca perdida de presion, con estructura ordenada, para su utilizacion en columnas de intercambio de materiales, y procedimiento para la rectificacion utilizando estas empaquetaduras.
US5762668A (en) * 1996-07-24 1998-06-09 Glitsch, Inc. Apparatus and method for deentrainment in a chemical process tower
US6713158B2 (en) * 1999-06-25 2004-03-30 The Boc Group, Inc. Structured packing
DE19936380A1 (de) 1999-08-03 2001-02-08 Basf Ag Geordnete Packung zum Wärme- und Stoffaustausch
US6423235B1 (en) * 1999-08-18 2002-07-23 Nittetu Chemical Engineering Ltd. Column gas-liquid contacting apparatus and its use thereof
US6478290B2 (en) * 1999-12-09 2002-11-12 Praxair Technology, Inc. Packing for mass transfer column
DE10010810A1 (de) * 2000-03-08 2001-09-13 Montz Gmbh Julius Flüssigkeitsverteiler und Verfahren zum Betreiben
DE10027779A1 (de) * 2000-06-07 2001-12-13 Basf Ag Verfahren zur Herstellung von Isocyanaten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02094432A1 *

Also Published As

Publication number Publication date
KR20040002964A (ko) 2004-01-07
KR100871948B1 (ko) 2008-12-08
WO2002094432A1 (fr) 2002-11-28
CN1509207A (zh) 2004-06-30
CN1229177C (zh) 2005-11-30
DE10124386A1 (de) 2002-11-28
US20040150123A1 (en) 2004-08-05
JP2004534636A (ja) 2004-11-18
US7431804B2 (en) 2008-10-07

Similar Documents

Publication Publication Date Title
EP1399252A1 (fr) Procede de distillation ou de distillation reactive d'un melange contenant au moins un constituant toxique
EP1074296B1 (fr) Procédé pour échange de chaleur et de masse
EP1261404B1 (fr) Procédé pour opérer un distributeur de liquides
EP0151693B1 (fr) Colonne d'échange de matière
DE2442603A1 (de) Dampf-fluessigkeitskontaktverfahren und vorrichtung zur durchfuehrung des verfahrens
DE2449383A1 (de) Gitteranordnung fuer dampf-fluessigkeits-kontaktbehaelter
EP1455931B1 (fr) Dispositif et procede de mise en oeuvre de distillations reactives a catalyse heterogene notamment destinees a la fabrication de pseudoionone
EP0221095B1 (fr) Materiau de garnissage tourbillonnaire et procede de sa fabrication
WO1990010497A1 (fr) Garniture a passages multiples pour la generation de tourbillons
EP1166867B1 (fr) Garnissage pour des colonnes de transfert de chaleur et de masse
EP0925109B1 (fr) Chicanes pour colonnes d'echange de substance
EP1251958A1 (fr) Garniture pour colonnes d'echange de chaleur ou de matiere
DE69101968T2 (de) Kolonnenpackung mit Leitvorrichtungen.
DE60125118T2 (de) System mit strukturierter Packung zur Minderung der Höhe einer Destillationskolonne
EP1317955B1 (fr) Dispositif et procédé pour des réactions hétérogènes catalytiques
EP1362636A2 (fr) Garnissage pour échange thermique et échange de matière
EP3551308B1 (fr) Fond de cascade, colonne de rectification contenant le fond de cascade, procédé pour faire fonctionner ladite colonne de rectification et utilisation de celle-ci
EP0264581A1 (fr) Dispositif de distribution des liquides pour des colonnes de transfert de matière et de chaleur
DE2511358A1 (de) Fuellkoerper hoher porositaet fuer gas-fluessigkeits-kontakte und anwendungen solcher fuellkoerper
DE10203819C2 (de) Einbauten für Packungskolonnen
EP0785019B1 (fr) Garnissage pour colonne d'échange de matière
EP2269728B1 (fr) Utilisation d'emballages ordonnés comportant une ou plusieurs positions d'empilement et une ou plusieurs positions de séparation
DE10226120A1 (de) Geträgerte Metalloxide als Katalysatoren für Aldolkondensationen
DD158205B1 (de) Stoffaustauscheinheit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031218

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DOBLER, WALTER

Inventor name: STROEZEL, MANFRED

Inventor name: SOHN, MARTIN

Inventor name: OOST, CARSTEN

Inventor name: STAMMER, ACHIM

Inventor name: KAIBEL, GERD

Inventor name: STROEFER, ECKHARD

17Q First examination report despatched

Effective date: 20040528

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20051107