CA1161747A - Column having trays with inclined apertures - Google Patents
Column having trays with inclined aperturesInfo
- Publication number
- CA1161747A CA1161747A CA000355691A CA355691A CA1161747A CA 1161747 A CA1161747 A CA 1161747A CA 000355691 A CA000355691 A CA 000355691A CA 355691 A CA355691 A CA 355691A CA 1161747 A CA1161747 A CA 1161747A
- Authority
- CA
- Canada
- Prior art keywords
- tray
- outlet
- column
- gas
- apertures
- 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.)
- Expired
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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/44—Fluidisation grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0005—Degasification of liquids with one or more auxiliary substances
- B01D19/001—Degasification of liquids with one or more auxiliary substances by bubbling steam through the liquid
- B01D19/0015—Degasification of liquids with one or more auxiliary substances by bubbling steam through the liquid in contact columns containing plates, grids or other filling elements
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/24—Treatment of polymer suspensions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Peptides Or Proteins (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
ABSTRACT
A column for removing a volatile component from a liquid by treat-ment of the liquid with a gas in counter-current flow has a series of vertically spaced trays with edges sealed to the wall of the column. Down-comers direct the liquid successively from each tray to the next lower tray and form an inlet and outlet for each tray. The inlets and outlets are hori-zontally spaced and each tray has an array of inclined apertures therein dis-tributed throughout its area including that region of the tray situated beneath its inlet. The inclined apertures are orientated in the same direction from the inlet towards the outlet downcomer and have gas-outlet areas shaped like segments of circles, each in a plane lying at an angle of between 10°
and 20° to the perpendicular to the tray.
A column for removing a volatile component from a liquid by treat-ment of the liquid with a gas in counter-current flow has a series of vertically spaced trays with edges sealed to the wall of the column. Down-comers direct the liquid successively from each tray to the next lower tray and form an inlet and outlet for each tray. The inlets and outlets are hori-zontally spaced and each tray has an array of inclined apertures therein dis-tributed throughout its area including that region of the tray situated beneath its inlet. The inclined apertures are orientated in the same direction from the inlet towards the outlet downcomer and have gas-outlet areas shaped like segments of circles, each in a plane lying at an angle of between 10°
and 20° to the perpendicular to the tray.
Description
74~
The invention relates to a column having trays arranged one above the other formed with inclined apertures for the removal of volatile components from suspensions by means of a gas.
The purpose of the invention is a treatment column for providing effective contact between the suspension and the gas.
It should be possible to produce the trays of the column economic-ally, and to prevent deposits from the suspension forming on them during long-term operation. T~hen the suspensions being treated are replaced, they should drain rapidly, leaving no residue; even major particle-aggregates, which may be present in the suspension, must be able to be flushed out easily.
It is known, for example, that monomer vinyl chloride may easily be expelled from polyvinyl chloride suspended in water by means of steam. Columns used for this purpose have been fitted with all known types of trays. Experience has shown that deposits are unavoidable in columns of conventional design having screen, bell and valved trays. With some trays it is impossible without the use of special devices, to drain the suspensions without leav-ing a residue. In the case of trays made of expanded metal, the free cross-section and size of the apertures cannot be varied at will .
The problem is therefore to equip a column with trays such that an optimal free cross-section for gas treatment of a given suspension may be selected in accordance with the size and location of the apertures, the cross-section of the apertures therein being substantially larger than the average size of the particle-agglomerates. The apertures are to permit rapid draining of the column, but the bottom must not permit weeping or trickling-through during treatment.
The invention provides a column for contact between a suspension and a gas for the removal of volatile components from the solid phase of -the suspension by treatment of the suspension with a gas in counter-current flow/ said column having a plurality of vertically spaced trays with edges sealed to the wall of the column, and downcomers to direct the suspension successively from each tray to the next lower tray and forming an inlet and outlet for each tray, said inlets and out:Lets being horizontally spaced and each tray having an array of inclined apertures therein dis-tributed throughout its area including that region of the tray situated beneath its inlet.
The inclined-hole tray is preferably sealed off from the wall of the column. The gas-outlet area of an inclined aperture may be substantially greater than the cross-section of an aperture in a conventional screen-bottom. The gas-outlet area of the inclined aperture advantageously is in the form of a semi-circle or a small segment of a circle, and the inclined apertures are of triangular cross-section in a plane at right angles to the surface of the tray and parallel to the gas-outlet direction.
The gas-outlet area of an inclined aperture is prefer-ably at an angle of at least 10 and at most 20 to the perpen-dicular to the tray.
The inclined apertures are preferably distributed uniformly over the tray, e.g. in a triangular array, the pitch of which is governed by the desired open area of the tray and the gas-outlet area of an inclined aperture.
The axes of all of the inclined apertures in a tray may
The invention relates to a column having trays arranged one above the other formed with inclined apertures for the removal of volatile components from suspensions by means of a gas.
The purpose of the invention is a treatment column for providing effective contact between the suspension and the gas.
It should be possible to produce the trays of the column economic-ally, and to prevent deposits from the suspension forming on them during long-term operation. T~hen the suspensions being treated are replaced, they should drain rapidly, leaving no residue; even major particle-aggregates, which may be present in the suspension, must be able to be flushed out easily.
It is known, for example, that monomer vinyl chloride may easily be expelled from polyvinyl chloride suspended in water by means of steam. Columns used for this purpose have been fitted with all known types of trays. Experience has shown that deposits are unavoidable in columns of conventional design having screen, bell and valved trays. With some trays it is impossible without the use of special devices, to drain the suspensions without leav-ing a residue. In the case of trays made of expanded metal, the free cross-section and size of the apertures cannot be varied at will .
The problem is therefore to equip a column with trays such that an optimal free cross-section for gas treatment of a given suspension may be selected in accordance with the size and location of the apertures, the cross-section of the apertures therein being substantially larger than the average size of the particle-agglomerates. The apertures are to permit rapid draining of the column, but the bottom must not permit weeping or trickling-through during treatment.
The invention provides a column for contact between a suspension and a gas for the removal of volatile components from the solid phase of -the suspension by treatment of the suspension with a gas in counter-current flow/ said column having a plurality of vertically spaced trays with edges sealed to the wall of the column, and downcomers to direct the suspension successively from each tray to the next lower tray and forming an inlet and outlet for each tray, said inlets and out:Lets being horizontally spaced and each tray having an array of inclined apertures therein dis-tributed throughout its area including that region of the tray situated beneath its inlet.
The inclined-hole tray is preferably sealed off from the wall of the column. The gas-outlet area of an inclined aperture may be substantially greater than the cross-section of an aperture in a conventional screen-bottom. The gas-outlet area of the inclined aperture advantageously is in the form of a semi-circle or a small segment of a circle, and the inclined apertures are of triangular cross-section in a plane at right angles to the surface of the tray and parallel to the gas-outlet direction.
The gas-outlet area of an inclined aperture is prefer-ably at an angle of at least 10 and at most 20 to the perpen-dicular to the tray.
The inclined apertures are preferably distributed uniformly over the tray, e.g. in a triangular array, the pitch of which is governed by the desired open area of the tray and the gas-outlet area of an inclined aperture.
The axes of all of the inclined apertures in a tray may
-2-74~7 be parallel to each other, or they may face each other in rows or zones. In the case of trays with radial flow, they may point radially outwards or radially inwards. If the suspension flows tangentially, the axes of the apertures are tangential; here again, the axes of the inclined apertures may be oppositely directed in different zones.
In columns of large cross-section, the surface of the trays may be strengthened by sheet--metal elements.
The column has no components other than a plurality of trays with horizontally arranged inclined-apertures, inlet and outlet downcomers, and -2a-`k~. ~
possibly strengthening elements. The downcomers may be fitted at any desired location on the trays, and may be provided with weirs or weir-like edges.
Each tray may have more than one inlet and outlet downcomer.
For the purpose of expelling monomer vinyl chloride from poly-vinyl chloride suspended in water, by blowing steam therethrough, it is pre-ferable to use inclined-aperture trays having the following characteristics:
the radius of the circle, the segment of which constitutes the steam-outlet area of an inclined aperture, is less than 7 mm, preferably 4 mm.
The height of the segment is less than 6 mm, preferably 3 mm. The open area of the tray - at right-angles to the steam-outlet surface - is less than 10%, preferably between 0.2 and 7% of the tray area. In this design of inclined-aperture tray, the apertures are arrayed in a triangular configuration at a spacing of approximately 18 mm.
The preferred inclined-aperture tray has the following advantages as compared with conventional designs:
The plates have good mechanical stability even if made of thin f~ sheet andlcorrespondingly light. The apertures serve directly as drain holes when the column is to be emptied. Even large particles and particle-agglomerates, if any, flow easily out of the column.
The inclined apertures impart to the gas, in the vicinity of the gas-outlet area, a greater component of velocity parallel to the tray than the component at right angles thereto. This means that even liquid actually in contact with the tray is kept in constant motion and is subjected to intensive mixing. There are no "dead spots". The mixing effect may also be improved by arranging the inclined apertures with their axes opposing each other in zones or sectors. The flow-pattern on the Eloor-plate may be varied at will by positioning the axes in other directions. This positively prevents
In columns of large cross-section, the surface of the trays may be strengthened by sheet--metal elements.
The column has no components other than a plurality of trays with horizontally arranged inclined-apertures, inlet and outlet downcomers, and -2a-`k~. ~
possibly strengthening elements. The downcomers may be fitted at any desired location on the trays, and may be provided with weirs or weir-like edges.
Each tray may have more than one inlet and outlet downcomer.
For the purpose of expelling monomer vinyl chloride from poly-vinyl chloride suspended in water, by blowing steam therethrough, it is pre-ferable to use inclined-aperture trays having the following characteristics:
the radius of the circle, the segment of which constitutes the steam-outlet area of an inclined aperture, is less than 7 mm, preferably 4 mm.
The height of the segment is less than 6 mm, preferably 3 mm. The open area of the tray - at right-angles to the steam-outlet surface - is less than 10%, preferably between 0.2 and 7% of the tray area. In this design of inclined-aperture tray, the apertures are arrayed in a triangular configuration at a spacing of approximately 18 mm.
The preferred inclined-aperture tray has the following advantages as compared with conventional designs:
The plates have good mechanical stability even if made of thin f~ sheet andlcorrespondingly light. The apertures serve directly as drain holes when the column is to be emptied. Even large particles and particle-agglomerates, if any, flow easily out of the column.
The inclined apertures impart to the gas, in the vicinity of the gas-outlet area, a greater component of velocity parallel to the tray than the component at right angles thereto. This means that even liquid actually in contact with the tray is kept in constant motion and is subjected to intensive mixing. There are no "dead spots". The mixing effect may also be improved by arranging the inclined apertures with their axes opposing each other in zones or sectors. The flow-pattern on the Eloor-plate may be varied at will by positioning the axes in other directions. This positively prevents
-3-7~7 bui]d-up of deposits throughout the column, or in the apertures, even durlng continuous operation over a period of several months.
Because of the large individual inclined apertures, resistance to the flow of gas is slight, even when the open area of the tray is comparatively small.
The inclined-aperture tray has little tendency to allow trickling through, in spite of the relatively large gas-outlet area of each aperture.
Even apertures immediately under the inlet shaft do not trickle. Before through-trickling takes place, the trays of this design must be tilted at a greater angle to the horizontal than conventional screen bottoms.
In the case of viscous liquids, the inclination of the surface of the liquid on a floor-plate, between the inlet and the outlet~ is reduced by the flow of gas which is partly parallel with the plate.
The invention will further be described, by way of example only, with reference to the accompanying drawings, wherein:
Figure 1 is a perspective view of a section of an inclined-aperture tray;
Figure 2ais a cross-section through a row of apertures in the plate in the gas-outlet direction;
Figure 2b is an enlarged view showing theangle a between the gas-outlet surface of the aperture and the perpendicular to the tray, and the angle ~ between the gas-outlet direction and ~he tray; and Figure 3 is a cross-section through a row of apertures in the tray, as seen at right angles to the cross-section in Figure 2a, showing the seg-ment-shaped gas-outlet areas of the apertures.
The efficiency of the comparatively simple column fitted with the inclined-aperture trays according to the invention, when used for degasifying ~6~7~
polyvinyl chloride with steam, is shown by the following example. The prin-cipal dimensions of the column are:
column 30 cm number of inclined-aperture trays 8 distance between the trays 25 cm open area of one tray 3.3%
steam-outlet area height of segments 3 mm radius of segments 4 mm diameter of inlet and outlet of down- 8 cm comers height of weir(sl 13 cm Each tray has an inlet and an outlet passage formed by downcomers arranged near the wall of the column and diametrically oppos-ite each other.
The axes of the inclined apertures in each tray are parallel with each other and are directed substantially from the inlet towards the outlet of each tray.
An aqueous polyvinyl-chloride suspension, heated to 70C and having a solids content of 27% by weight and an average particle size of 150 ,um, was placed upon the upper tray of the column. The solid substance contained 6000 ppm of monomer vinyl chloride. A volume of steam amounting to 0.27 kg/kg was supplied beneath the bottom tray.
After a residence period of 5 minutes in the column, the suspension draining from the bottom tray contained less than 60 ppm of monomer vinyl chloride in the solid. The temperature of the bottom tray was 102C.
This degasification result agrees well with the results obtained with known columns of other designs, but the column having the inclined-aperture floor-plates also has the advantages mentioned above over the known columns.
Because of the large individual inclined apertures, resistance to the flow of gas is slight, even when the open area of the tray is comparatively small.
The inclined-aperture tray has little tendency to allow trickling through, in spite of the relatively large gas-outlet area of each aperture.
Even apertures immediately under the inlet shaft do not trickle. Before through-trickling takes place, the trays of this design must be tilted at a greater angle to the horizontal than conventional screen bottoms.
In the case of viscous liquids, the inclination of the surface of the liquid on a floor-plate, between the inlet and the outlet~ is reduced by the flow of gas which is partly parallel with the plate.
The invention will further be described, by way of example only, with reference to the accompanying drawings, wherein:
Figure 1 is a perspective view of a section of an inclined-aperture tray;
Figure 2ais a cross-section through a row of apertures in the plate in the gas-outlet direction;
Figure 2b is an enlarged view showing theangle a between the gas-outlet surface of the aperture and the perpendicular to the tray, and the angle ~ between the gas-outlet direction and ~he tray; and Figure 3 is a cross-section through a row of apertures in the tray, as seen at right angles to the cross-section in Figure 2a, showing the seg-ment-shaped gas-outlet areas of the apertures.
The efficiency of the comparatively simple column fitted with the inclined-aperture trays according to the invention, when used for degasifying ~6~7~
polyvinyl chloride with steam, is shown by the following example. The prin-cipal dimensions of the column are:
column 30 cm number of inclined-aperture trays 8 distance between the trays 25 cm open area of one tray 3.3%
steam-outlet area height of segments 3 mm radius of segments 4 mm diameter of inlet and outlet of down- 8 cm comers height of weir(sl 13 cm Each tray has an inlet and an outlet passage formed by downcomers arranged near the wall of the column and diametrically oppos-ite each other.
The axes of the inclined apertures in each tray are parallel with each other and are directed substantially from the inlet towards the outlet of each tray.
An aqueous polyvinyl-chloride suspension, heated to 70C and having a solids content of 27% by weight and an average particle size of 150 ,um, was placed upon the upper tray of the column. The solid substance contained 6000 ppm of monomer vinyl chloride. A volume of steam amounting to 0.27 kg/kg was supplied beneath the bottom tray.
After a residence period of 5 minutes in the column, the suspension draining from the bottom tray contained less than 60 ppm of monomer vinyl chloride in the solid. The temperature of the bottom tray was 102C.
This degasification result agrees well with the results obtained with known columns of other designs, but the column having the inclined-aperture floor-plates also has the advantages mentioned above over the known columns.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A column for contact between a suspension and a gas for the removal of volatile components from the solid phase of the suspension by treatment of the suspension with a gas in counter-current flow, said column having a plurality of vertically spaced trays with edges sealed to the wall of the column, and downcomers to direct the suspension successively from each tray to the next lower tray and forming an inlet and outlet for each tray, said inlets and outlets being horizontally spaced and each tray having an array of inclined apertures therein distributed throughout its area including that region of the tray situated beneath its inlet.
2. A column according to claim 1 wherein the inclined apertures in a tray are orientated in the same direction being directed from the inlet towards the outlet downcomer.
3. A column according to claim 1, wherein said inclined apertures have gas-outlet areas shaped like segments of circles.
4. A column according to claim 1, 2 or 3, wherein the inclined apertures have each a gas-outlet opening which is in a plane lying at an angle of between 10° and 20° to the perpendicular to the tray.
5. A column according to claim 1, 2 or 3, wherein said inclined apertures are of triangular cross-section in a plane which is at right angles to the floor-plate and runs parallel with the gas-outlet direction.
6. A column according to claim 1, 2 or 3 for removing monomer vinyl chloride from polyvinyl chloride suspended in water by blowing steam therethrough, wherein:
a) a tray has an open area which - as seen at right angles to the steam-outlet surface - amounts to less than 10% of the floor area, preferably between 0,2 and 7%; and b) the inclined apertures each have a segment-shaped steam-outlet area which is less than 6 mm in height; and a segment radius of less than 7 mm.
a) a tray has an open area which - as seen at right angles to the steam-outlet surface - amounts to less than 10% of the floor area, preferably between 0,2 and 7%; and b) the inclined apertures each have a segment-shaped steam-outlet area which is less than 6 mm in height; and a segment radius of less than 7 mm.
7. A column according to claim 1, 2 or 3, for removing monomer vinyl chloride from polyvinyl chloride suspended in water by blowing steam there-through, wherein:
a) a tray has an open area which - as seen at right angles to the steam-outlet surface - amounts to less than 10% of the floor area, preferably between 0,2 and 7%; and b) the inclined apertures each have a segment-shaped steam-outlet area which is approximately 3 mm in height, and a segment radius of approximately 4 mm.
a) a tray has an open area which - as seen at right angles to the steam-outlet surface - amounts to less than 10% of the floor area, preferably between 0,2 and 7%; and b) the inclined apertures each have a segment-shaped steam-outlet area which is approximately 3 mm in height, and a segment radius of approximately 4 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2927787.0-43 | 1979-07-10 | ||
| DE19792927787 DE2927787A1 (en) | 1979-07-10 | 1979-07-10 | COLUMN WITH SLOPED HOLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1161747A true CA1161747A (en) | 1984-02-07 |
Family
ID=6075324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000355691A Expired CA1161747A (en) | 1979-07-10 | 1980-07-08 | Column having trays with inclined apertures |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0022158B1 (en) |
| JP (1) | JPS5615808A (en) |
| AT (1) | ATE4285T1 (en) |
| BR (1) | BR8004240A (en) |
| CA (1) | CA1161747A (en) |
| DE (1) | DE2927787A1 (en) |
| GR (1) | GR69244B (en) |
| NO (1) | NO150546C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8822479D0 (en) * | 1988-09-23 | 1988-10-26 | Boc Group Plc | Liquid gas contact |
| KR101246374B1 (en) * | 2006-04-27 | 2013-03-21 | 주식회사 대우일렉트로닉스 | Washing machine |
| CN117018678B (en) * | 2023-10-08 | 2023-12-19 | 江苏博优特环保科技有限公司 | Vibrating extraction tower |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE335552C (en) * | 1918-08-24 | 1921-04-06 | Still Fa Carl | Process for operating distillation, gas washing u. Like. Columns with horizontal sieve trays |
| DE871594C (en) * | 1941-12-16 | 1953-03-23 | Walter Dipl-Ing Kittel | Exchange floor |
| US3039750A (en) * | 1952-03-07 | 1962-06-19 | Kittel Walter | Contact plate structure for use in a rectifying or contacting column |
| BE518550A (en) * | 1952-03-26 | |||
| FR1172811A (en) * | 1956-03-05 | 1959-02-16 | Bataafsche Petroleum | Contact column and trays for this column |
| FR1153471A (en) * | 1956-05-05 | 1958-03-11 | Universal Oil Prod Co | Apparatus for bringing a liquid into contact with another fluid |
| DE1253672B (en) * | 1961-11-29 | 1967-11-09 | Linde Ag | Arrangement of exchange floors of any kind in washing or rectification columns |
| DE1519646A1 (en) * | 1966-05-13 | 1970-03-12 | Linde Ag | Device for the axial attachment of an intermediate floor or the like. on the wall of a cylindrical vessel, e.g. a sieve or bell bottom in a column for fractional rectification or distillation |
| DE1946159A1 (en) * | 1968-10-23 | 1971-03-18 | Messer Griesheim Gmbh | Column sectional floor |
| CA932652A (en) * | 1968-10-26 | 1973-08-28 | B. Nazzer Don | Tower vapour feed system |
| US3550916A (en) * | 1968-11-29 | 1970-12-29 | Germania Chemieanlagen Und App | High capacity mass transfer plate for columns |
| JPS4915153B1 (en) * | 1969-06-06 | 1974-04-12 | ||
| DD86168A1 (en) * | 1970-08-14 | 1971-12-05 | EXCHANGE FLUIDS FOR COLONS FOR NITROSEGAS OXYDATION AND / OR ABSORPTION AND FOR ART-RELATED PROCESSES | |
| DE2241311A1 (en) * | 1972-08-23 | 1974-02-28 | Lonza Ag | Process column with removable trays - held in place by inflatable peripheral tube bearing against column wall |
| US4118285A (en) * | 1975-04-29 | 1978-10-03 | Villanova University | Separation of liquid mixtures |
| SU602203A1 (en) * | 1975-05-26 | 1978-04-15 | Центральное конструкторское бюро нефтеаппаратуры | Tray for heat-mass exchange apparatus |
| DE2554789C3 (en) * | 1975-12-05 | 1979-02-15 | Krasnodarskij Politechnitscheskij Institut, Krasnodar (Sowjetunion) | Contact tray for column apparatus for carrying out mass transfer processes between gas and liquid |
| JPS598281B2 (en) * | 1976-04-05 | 1984-02-23 | 日本ゼラオン株式会社 | Suitable gas-liquid contact column for removing vinyl chloride monomer from vinyl chloride polymer-containing slurry |
| NZ184661A (en) * | 1976-07-27 | 1979-08-31 | Ici Australia Ltd | Removing monomer from vinyl chloride polymers |
| CA1118337A (en) * | 1977-10-05 | 1982-02-16 | Walter Bruckert | Weeping-resistant vapor-liquid contacting tray |
-
1979
- 1979-07-10 DE DE19792927787 patent/DE2927787A1/en active Granted
-
1980
- 1980-05-20 EP EP80102774A patent/EP0022158B1/en not_active Expired
- 1980-05-20 AT AT80102774T patent/ATE4285T1/en active
- 1980-06-18 GR GR62230A patent/GR69244B/el unknown
- 1980-07-02 NO NO802001A patent/NO150546C/en unknown
- 1980-07-08 CA CA000355691A patent/CA1161747A/en not_active Expired
- 1980-07-09 JP JP9281380A patent/JPS5615808A/en active Pending
- 1980-07-09 BR BR8004240A patent/BR8004240A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO150546B (en) | 1984-07-30 |
| NO150546C (en) | 1984-11-07 |
| JPS5615808A (en) | 1981-02-16 |
| NO802001L (en) | 1981-01-12 |
| EP0022158A1 (en) | 1981-01-14 |
| DE2927787C2 (en) | 1987-05-21 |
| BR8004240A (en) | 1981-01-21 |
| EP0022158B1 (en) | 1983-07-27 |
| GR69244B (en) | 1982-05-11 |
| ATE4285T1 (en) | 1983-08-15 |
| DE2927787A1 (en) | 1981-01-22 |
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