EP3049352A1 - Verwendung von flexiblen behältern zur lagerung von flüssigkeiten - Google Patents
Verwendung von flexiblen behältern zur lagerung von flüssigkeitenInfo
- Publication number
- EP3049352A1 EP3049352A1 EP14771318.4A EP14771318A EP3049352A1 EP 3049352 A1 EP3049352 A1 EP 3049352A1 EP 14771318 A EP14771318 A EP 14771318A EP 3049352 A1 EP3049352 A1 EP 3049352A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flexible container
- flexible
- liquid
- container
- rigid
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 77
- 238000003860 storage Methods 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 12
- 239000000969 carrier Substances 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 4
- 239000010779 crude oil Substances 0.000 claims description 2
- 235000021056 liquid food Nutrition 0.000 claims description 2
- 239000003209 petroleum derivative Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 22
- 229920001567 vinyl ester resin Polymers 0.000 description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 7
- 239000005977 Ethylene Substances 0.000 description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000004815 dispersion polymer Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003139 biocide Substances 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- GLVVKKSPKXTQRB-UHFFFAOYSA-N ethenyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC=C GLVVKKSPKXTQRB-UHFFFAOYSA-N 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229920000034 Plastomer Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 235000019990 fruit wine Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/04—Linings
- B65D90/046—Flexible liners, e.g. loosely positioned in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1656—Flexible intermediate bulk containers [FIBC] for liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1675—Lifting fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/78—Large containers for use in or under water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2590/00—Component parts, details or accessories for large containers
- B65D2590/02—Wall construction
- B65D2590/04—Linings
- B65D2590/043—Flexible liners
- B65D2590/046—Bladders
Definitions
- the invention relates to the use of flexible containers for the storage of liquids, in particular of aqueous polymer dispersions.
- the flexible container of WO-Al 2008/014203 are cylindrical in shape with flexible side walls and flattened, rigid or rigid floors or lids. Also US 2798639 describes comparable systems.
- WO-A1 81/03011 discloses spherical flexible containers. Flexible containers are lighter and foldable than metal tanks, making them quicker, easier to install, and resistant to rust.
- a further challenge is to be able to remove as completely as possible stored liquids in such flexible containers in a simple and efficient manner as possible from the flexible containers, so that the cost of cleaning the flexible container after removal of the liquids is reduced. Moreover, it is very complicated or even in the previously known flexible containers not possible to reliably determine the amount of liquid contained therein.
- the object was to provide infrastructure facilities for the storage of liquids, with which one or more of the aforementioned problems can be solved.
- the invention relates to the use of a flexible container for storing liquid
- the flexible container is partially or completely surrounded by a liquid medium, characterized in that the bottom of the flexible container tapers conically to a point at which liquid can be removed from the flexible container (sampling point).
- the flexible container may also be referred to as a hollow body.
- the liquid In the hollow interior of the hollow body, the liquid is stored. Storage generally means that the liquid is in the flexible container for a certain period of time.
- a flexible container has a capacity of preferably 2 to 50,000 cubic meters, more preferably 5 to 3,000 cubic meters, and most preferably 10 to 300 cubic meters of liquid.
- the flexible container is preferably in the form of a cylinder, sack, pillow or bag having a bottom tapering to the point where liquid can be withdrawn from the flexible container (sampling point).
- the flexible container may in this case also be irregular in shape and deviate from the aforementioned forms.
- the flexible container preferably has no square, rectangular, cuboid or round shape and in particular no spherical shape or no ellipsoidal shape.
- Tapered means that the bottom of the flexible container, ie the bottom of the flexible container, narrows or tapers towards the sampling point.
- conical are funnel-shaped, conical, wedge-shaped or paraboloidal. It can also be a dished bottom.
- the bottom of a flexible container may also take the form of a cone, with the extraction point located at the apex of the cone.
- the cone is usually a hollow body.
- the cone may be cut off, straight or oblique and may deviate from the cone shape in a regular or irregular manner.
- the floor generally has a slope towards the extraction point.
- the slope of the bottom is preferably 5 ° to 44 °, more preferably 10 ° to 20 °, and most preferably 10 ° to 15 °.
- the sampling point is generally at the lowest point of the soil.
- the flexible container is preferably based on a flexible membrane.
- the flexible membrane has a thickness of 2 to 10 mm, and more preferably 3 to 5 mm.
- the flexible membrane is preferably constructed of plastic material, optionally in the form of a composite material.
- Preferred plastic materials are polyvinyl chloride, preferably polyurethanes, polyesters, polypropylene, rubber, in particular neoprene rubber or nitrile rubber.
- Examples of composites are fiber or fabric reinforced plastic materials. Suitable materials for fibers are based, for example, on glass, metals or organic polymers, in particular polyamide, polypropylene or cellulose. Textile fibers are preferred.
- the flexible membrane may also be constructed of multiple layers of the same or different plastic materials and / or composite materials.
- the surface or surfaces of the flexible membrane may also be coated, for example with plastomers or elastomers, such as polyvinyl chloride or polyacrylonitrile.
- plastomers or elastomers such as polyvinyl chloride or polyacrylonitrile.
- the flexible container is generally impermeable to liquids to be stored and the liquid medium surrounding the flexible container.
- the flexible container may be reinforced at one or more locations.
- another material can be applied to the flexible container, or the flexible membrane, for example the plastic material, can have a greater layer thickness at this point, preferably additionally 1 to 10 mm or 1 to 5 mm.
- the reinforcements may be annular or in the form of discs or bands attached to the flexible containers. This makes the flexible containers more resilient.
- the other areas of the flexible container are generally not rigid, rigid, stiff or inelastic.
- the flexible container generally has a plurality or preferably a removal device, for example an outlet line, optionally a plurality or preferably a filling device, for example a supply line, optionally one or more sampling devices, optionally one or more temperature control devices and optionally one or more vent lines and optionally one or more overpressure safeguards.
- the removal device can also be used as a filling device.
- the extraction device and the filling device are not identical.
- the filling device is preferably opposite the removal device, so it is preferably not at the bottom of the flexible container.
- the filling device is preferably mounted on the top of the flexible container.
- About the removal device or the filling device liquid can be removed from the flexible container or introduced into the flexible container.
- the sampling device is located on the sampling point.
- the sampling device or the filling device may comprise one or more pumps.
- the flexible container is partially or preferably completely surrounded by liquid medium or immersed in liquid medium.
- the liquid medium is particularly suitable water.
- the liquid medium and the liquid to be stored are thus generally different.
- the liquid medium may also be a further liquid which is to be stored.
- the liquid medium can therefore also be a stored product.
- the liquid medium is present at temperatures of preferably 5 to 90 ° C, more preferably 10 to 40 ° C, and most preferably 15 to 30 ° C.
- the liquid medium may contain additives such as biocides or salts. In the procedure according to the invention, there is generally no mixing of the liquid which is located in the flexible container and of the liquid medium which is located in the rigid container.
- the liquid medium is generally in a rigid container, such as a metal container or a basin built of mineral building materials, such as concrete.
- the flexible container is generally partially or preferably entirely within a rigid container. This means that the flexible container with a part of its volume or preferably with its entire volume is in the rigid container.
- the rigid container is preferably a building with floor, side walls and possibly a ceiling.
- the sidewalls generally connect to the floor and the optional ceiling of the rigid container.
- Walls and bottom of the rigid container preferably form a continuous or closed unit, ie a building without openings or openings.
- the rigid container is therefore generally closed and sealed, so that no liquid medium escapes from the rigid container.
- One or more stelae can be erected on the floor of the rigid container.
- the stelae are preferably vertical, but may also be oriented obliquely.
- several stelae are aligned in one or more, in particular parallel rows.
- the stelae have diameters of preferably 10 to 50 cm, more preferably 10 to 20 cm, and most preferably 10 to 20 cm.
- One or more supports may rest on one or more walls of the rigid container and / or on one or more stelae. Carriers may also be embedded in the walls of the rigid container. Finally, carriers can also rest on the bottom of the rigid container.
- the carriers are preferably horizontal, but may also be oriented obliquely. Several carriers can also form a grid.
- the carriers are preferably made of metal.
- the carriers are generally common T-bars.
- the flexible containers are preferably fixed to the rigid containers, more preferably to carriers.
- the flexible containers may be fixed to the ceiling of a rigid container. These embodiments are particularly suitable when the liquid to be stored has a similar or higher density than the liquid medium.
- the flexible containers may also be fixed to the bottom of the rigid container. This embodiment is particularly suitable when the liquid to be stored has a similar or lower density than the liquid medium.
- the fixation of the flexible container to the rigid container or to the carrier can be done for example via one or more holding devices, in particular by means of one or more ropes, belts, chains or preferably by means of a network.
- the flexible Le container wrapped by a network which is fixed to a holding device.
- a bag is used for fixation.
- the flexible container is completely or preferably partially, in particular in the region of the removal point or the bottom of the flexible container in a bag.
- the bag may be constructed of the same materials and / or in the same manner as described above for the flexible membrane. It is also possible to attach a plurality of fixations, in particular a pocket and one or more further fixations.
- the above-mentioned reinforcements are preferably mounted. Particularly preferred are fixations and reinforcements on the
- Bottom and / or top of the flexible container or at the bottom and / or on the opposite side of the bottom of the flexible container, or in the area or on the side at which the extraction point and / or the filling device of the flexible container located.
- the area around the filling device and / or around the removal point is preferably rigid, for example not completely elastic.
- weighing cells are attached to one or more fixations of a flexible container, such as conventional strain gauges.
- the flexible container is fixed to one or more carriers that rest on load cells.
- the rigid container may, for example, have a length of 30 meters and a width of 60 meters or 30 meters.
- a farm may preferably contain 2 to 30, more preferably 5 to 30 and most preferably 10 to 20 flexible containers.
- two or more flexible containers may contain different liquids.
- the individual flexible containers can have different sizes. This achieves a high degree of flexibility with regard to the type and quantity of the liquids to be stored, and simplifies the storage logistics.
- the liquid is removed from the flexible container and preferably led out via the upper side of the rigid container, particularly preferably through the ceiling of the rigid container.
- the extraction device or the filling device can also be guided over the side wall or through the bottom of the rigid container.
- the flexible container may be used once or preferably several times for storing the same or different liquids. If necessary, the flexible container can be cleaned after a discharge and before the next filling by rinsing with a washing solution, preferably water. Preferably, it is rinsed one to three times. For this purpose, relatively small amounts of washing solution are sufficient. Due to the inventive shape of the flexible container can Such rinses are shortened or can be omitted entirely. As a result, different liquids can be successively stored in the flexible container without causing cross-contamination, for example as a result of residues in the feed or discharge lines or the flexible container itself.
- a washing solution preferably water.
- it is rinsed one to three times.
- relatively small amounts of washing solution are sufficient. Due to the inventive shape of the flexible container can Such rinses are shortened or can be omitted entirely. As a result, different liquids can be successively stored in the flexible container without causing cross-contamination, for example as a result of residues in the feed or discharge lines or the flexible container itself
- the rigid container may be completely or preferably partially installed underground. Above the rigid container other structures may be built, such as control rooms, office buildings, parking garages, buildings with production facilities or other inventive or other storage. The rigid container can therefore be integrated into a building. The rigid container may also be in a ship.
- the rigid container may be surrounded by an enclosure.
- the rigid container may be in a pan with all or part of its volume.
- the flexible container is suitable for storage of a wide variety of liquids, such as crude oil, petroleum products, liquid foods, such as milk, fruit juices or wine, or in particular aqueous polymer dispersions, or other organic liquids, such as ethanol.
- liquids such as crude oil, petroleum products, liquid foods, such as milk, fruit juices or wine, or in particular aqueous polymer dispersions, or other organic liquids, such as ethanol.
- Preferred liquids are at temperatures of preferably 5 to 90 ° C and more preferably 10 to 30 ° C in liquid form.
- Polymer dispersions are obtainable, for example, by emulsion polymerization processes.
- the polymers are preferably prepared by free-radically initiated polymerization of one or more ethylenically unsaturated monomers in an aqueous medium.
- the polymers can be stabilized with the customary emulsifiers and / or preferably protective colloids, such as polyvinyl alcohols.
- Preferred ethylenically unsaturated monomers are selected from the group comprising vinyl esters, (meth) acrylic esters, vinylaromatics, olefins, 1,3-dienes and vinyl halides and, if appropriate, further monomers copolymerizable therewith.
- vinyl ester copolymers Preference is given to vinyl ester copolymers.
- preferred vinyl ester copolymers are based on 30 to 90 wt .-% of one or more vinyl esters, 1 to 40 wt .-% of ethylene and optionally 1 to 40 wt .-% of one or more other comonomers, based on the total weight of monomers.
- the other comonomers are preferably the aforementioned monomers other than vinyl esters and ethylene.
- Butyl acrylate or 2-ethylhexyl acrylate which still contain from 1 to 40% by weight of ethylene; and mixtures with vinyl acetate, 1 to 40% by weight of ethylene and 1 to 60% by weight of vinyl chloride; wherein the data in wt .-% add up to each 100 wt .-%.
- the polymer dispersions have a solids content of preferably from 30 to 70% and more preferably from 40 to 60%.
- the polymer dispersions have Brookfield viscosities of For example, 1 mPas and 50,000 mPas (determined at 23 ° C using a Brookfield viscometer with spindle 5 and 20 revolutions per minute).
- the procedure according to the invention has proved to be particularly advantageous.
- the polymer dispersions are less susceptible to bacterial attack, so that the customary addition of biocides thereto can be reduced or even completely omitted.
- skin formation occurs at the interface between the polymer dispersion and the environment, ie a filming of the polymers. By the procedure according to the invention this can be avoided.
- the inventive design of the flexible container supports the most complete and time-efficient removability of liquid from the flexible container and reduces the makesauf and for any remaining in the flexible container after the liquid withdrawal liquid residues.
- the liquid medium can also serve as a cooling medium or heat medium for liquids to be stored.
- a hot or hot liquid to be stored may be directly in the flexible container without prior cooling given and tempered therein to the desired storage temperature.
- the storage temperature can be controlled by appropriate temperature control of the liquid medium.
- the inventive concept also allows a highly efficient use of built-up area, as above the rigid container other uses or other building parts can be built, such as commercial spaces, parking or living space.
- inventive concept can be dispensed with breakthroughs in the region of the bottom or the walls of the rigid container, so that the stored liquids reliably housed and thus precautions against contamination of the environment can be taken.
- FIG. 2 is a side view of FIG. 1.
- the flexible container 2 consisted of a 4 mm thick membrane made of neoprene rubber.
- the flexible container 2 was fixed by the pocket 3 and by the bands 4 and 7, which in turn were fixed to the carrier 5 and 6, respectively.
- the beams 5 and 6 were T-beams made of metal and formed a grid.
- the pockets 3 as well as the bands 4 and 7 consisted of neoprene
- the carriers 5 rests on the load cells 8. With the weighing cells 8, the weight of the plant and thus of the stored amount of polymer dispersion could be determined at any time.
- a removal device with outlet 10 through which the polymer dispersion was removed from the flexible container again.
- the flexible container 2 was completely within the rigid container 11, which was constructed of concrete.
- the flexible container 2 was completely surrounded by the liquid medium 12 water, which had a temperature of 20 ° C.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013219072.7A DE102013219072A1 (de) | 2013-09-23 | 2013-09-23 | Verwendung von flexiblen Behältern zur Lagerung von Flüssigkeiten |
| PCT/EP2014/070056 WO2015040193A1 (de) | 2013-09-23 | 2014-09-19 | Verwendung von flexiblen behältern zur lagerung von flüssigkeiten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3049352A1 true EP3049352A1 (de) | 2016-08-03 |
| EP3049352B1 EP3049352B1 (de) | 2017-01-11 |
Family
ID=51582406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14771318.4A Not-in-force EP3049352B1 (de) | 2013-09-23 | 2014-09-19 | Verwendung eines flexiblen behälters zur lagerung von flüssigkeiten |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9701468B2 (de) |
| EP (1) | EP3049352B1 (de) |
| CN (1) | CN105579363B (de) |
| DE (1) | DE102013219072A1 (de) |
| WO (1) | WO2015040193A1 (de) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1669183A (en) * | 1924-03-26 | 1928-05-08 | Standard Oil Co | Breather bag |
| US2289139A (en) * | 1939-02-16 | 1942-07-07 | Graver Tank & Mfg Co Inc | Breather reservoir |
| US2712797A (en) * | 1951-05-31 | 1955-07-12 | Nat Sugar Refining Company | Convertible load compartment for freight vehicles |
| US2798639A (en) | 1955-07-11 | 1957-07-09 | Universal Oil Prod Co | Container |
| US3518836A (en) * | 1968-02-14 | 1970-07-07 | Hideo Itokawa | Underwater oil tank |
| US3643447A (en) * | 1969-12-04 | 1972-02-22 | Texaco Inc | Flexible storage container for offshore facility |
| DE2356777A1 (de) * | 1973-11-14 | 1975-10-23 | Joachim Dipl Ing Beushausen | Chemieapparate in unterwasseranordnung und verfahren zum betrieb derselben |
| US4232803A (en) * | 1978-11-06 | 1980-11-11 | A.I.R. Foundation | Bulk material retaining system having plural retainers |
| GB2047414B (en) * | 1979-03-07 | 1983-02-09 | Tonnes Force Testing Services | Weight-testing apparatus |
| FR2480250A1 (fr) | 1980-04-14 | 1981-10-16 | Moreau Marcel | Dispositif d'equipement avec une vessie-reservoir adaptable a l'interieur d'une cuve-citerne |
| AU2489684A (en) * | 1983-02-25 | 1984-08-30 | D. & R. Tarpaulin Services Pty. Ltd. | Disposable container |
| GB8530851D0 (en) * | 1985-12-14 | 1986-01-22 | Sidian Trading Ltd | Bags |
| CN2308553Y (zh) * | 1997-04-10 | 1999-02-24 | 江阴祥龙船舶工程总公司 | 高强度船用吊重水囊袋 |
| US6718900B2 (en) * | 2002-06-11 | 2004-04-13 | Gregory James Carter | Variable storage vessel and method |
| US20090242566A1 (en) | 2006-07-26 | 2009-10-01 | Witheridge Anthony J | Multi-Product Tank |
| WO2009149138A2 (en) * | 2008-06-06 | 2009-12-10 | Utilequip, Inc. | Flexible fabric shipping and dispensing container |
| WO2013030605A2 (en) * | 2011-09-01 | 2013-03-07 | Loladze Vladimer | Method for transporting minerals and fossil fuels from underwater sources |
| CN102700735A (zh) * | 2012-06-05 | 2012-10-03 | 无锡大东机械制造有限公司 | 粉料吨袋定量包装秤及包装方法 |
-
2013
- 2013-09-23 DE DE102013219072.7A patent/DE102013219072A1/de not_active Withdrawn
-
2014
- 2014-09-19 EP EP14771318.4A patent/EP3049352B1/de not_active Not-in-force
- 2014-09-19 US US15/023,855 patent/US9701468B2/en not_active Expired - Fee Related
- 2014-09-19 WO PCT/EP2014/070056 patent/WO2015040193A1/de not_active Ceased
- 2014-09-19 CN CN201480051985.9A patent/CN105579363B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2015040193A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105579363B (zh) | 2018-02-23 |
| EP3049352B1 (de) | 2017-01-11 |
| US20160229625A1 (en) | 2016-08-11 |
| WO2015040193A1 (de) | 2015-03-26 |
| US9701468B2 (en) | 2017-07-11 |
| DE102013219072A1 (de) | 2015-03-26 |
| WO2015040193A9 (de) | 2015-06-04 |
| CN105579363A (zh) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1502946B1 (de) | Solid State Fermenter | |
| DE202021104334U1 (de) | Anlage zur Erzeugung eines Mineralschaumes | |
| DE202013100415U1 (de) | Gasbehälter, insbesondere zur Aufnahme von Biogas | |
| EP2275354B1 (de) | Behälter für Trockeneisteilchen | |
| DE1244658B (de) | OElspeichereinrichtung auf See | |
| EP3049352B1 (de) | Verwendung eines flexiblen behälters zur lagerung von flüssigkeiten | |
| DE4129174C2 (de) | Verfahren zum Behandeln von Maische, insbesondere Rotwein-Maische | |
| EP2388311B2 (de) | Gasspeicher | |
| EP2988860B1 (de) | Verfahren und versorgungseinheit zur restabilisierung von radikalisch polymerisierbaren monomeren | |
| DE1642918C3 (de) | Verfahren und Vorrichtung zum Dosieren eines pulverförmigen Gutes | |
| DE3411264A1 (de) | Verfahren und vorrichtung zur erzeugung von biogas | |
| DE2263666A1 (de) | Vorrichtungen zur erzeugung einer zirkulationsbewegung in fluessigkeiten oder gemischen aus fluessigkeit und festkoerpern in einem behaelter | |
| EP2624945B1 (de) | Vorrichtung und verfahren zum erwärmen eines flüssigen mediums, insbesondere maischvorrichtung zum herstellen von bier | |
| DE60122887T2 (de) | Anlage zur meeresfischzucht | |
| EP0254826A2 (de) | Dichtungssystem für Rührer mit Untenantrieb | |
| EP1826151B1 (de) | Verfahren und Vorrichtung zum Lagern chemischer Produkte in einem Behälter | |
| DD146898A5 (de) | Verfahren und vorrichtung zur grosstechnischen durchfuehrung exothermer und endothermer prozesse in einem behaelter | |
| EP2465918B1 (de) | Biomassetrockenfermenter mit kontinuierlicher Beschickung und Entnahme | |
| DE102010010352A1 (de) | Gesteuertes Auftriebsverhalten von in Trinkbehältern befindlichen Elementen | |
| DE102004062703A1 (de) | Mischbehälter mit Stromstörern | |
| DE43536C (de) | Vorrichtung zum Anzeigen und Abstellen von Rohrbrüchen bei Hauswasserleitungen | |
| DE955411C (de) | Reaktionskolonne fuer die kontinuierliche Behandlung von Fluessigkeiten | |
| DE102005028433A1 (de) | Festbettreaktor zur anaeroben Behandlung von Abwasser | |
| CN107928479A (zh) | 一种新型核桃破壳装置 | |
| DE102013102417B4 (de) | Einrichtung zum Entleeren von Silos für Schüttgüter |
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: 20160318 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| DAX | Request for extension of the european patent (deleted) | ||
| INTG | Intention to grant announced |
Effective date: 20160829 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 861043 Country of ref document: AT Kind code of ref document: T Effective date: 20170115 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502014002507 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20170111 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170412 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170411 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170511 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170511 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170411 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502014002507 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| 26N | No opposition filed |
Effective date: 20171012 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20170930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170919 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20180531 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170930 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170930 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170919 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20171002 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20180919 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20140919 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180919 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20190918 Year of fee payment: 6 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20170111 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 861043 Country of ref document: AT Kind code of ref document: T Effective date: 20190919 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190919 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502014002507 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210401 |