Abstract: The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (8) and a second distillation unit (10), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether as an intermediate product and diisobutene as a by-product in the etherification unit (3); (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), the alkyl tert-butyl ether and diisobutene being withdrawn as the liquid or vaporous bottom product (7), and vaporizing the bottom product (7) if it is withdrawn as a liquid; (c) reacting the vaporous bottom product (7) in the presence of an acidic catalyst

Abstract: The invention relates to a process for starting up a plant for removing isobutene from an isobutene-containing C4-hydrocarbon mixture, the plant comprising an etherification unit containing moist acidic ion exchange resin, a first distillation unit, an ether cleavage unit, and a second distillation unit. The invention further relates to a process for shutting down the plant from a stationary operation mode.

Abstract: A method for packaging a pack commodity comprises: providing a support element having an upper side, a lower side and side surfaces; placing a first packaging material sheet on the upper side; arranging the pack commodity on the first packaging material sheet such that a portion of the first packaging material sheet lies between the support element and the pack commodity and that with parts of the first packaging material sheet protruding beyond the pack commodity; placing a second packaging material sheet on an upper side of the pack commodity such that parts of the second packaging material sheet protrude beyond the pack commodity; folding the protruding parts so that they overlap along an overlapping portion on the side surfaces of the support element; applying a peripheral angular contact-pressure device laterally to the overlapping portion and to the upper side of the second packaging material sheet; and bracing the angular contact-pressure device by applying tension straps to generate a contact pressure

Abstract: The present invention provides an arrangement for securing plate-like material, having a carrier, on which the plate-like material is arranged in a stack, at least one retaining means, which extends around the plate-like material and the carrier for the purpose of securing the plate-like material, and at least one angled securing device which has a first and a second leg and is arranged at a corner of the plate-like material, encloses two sides of the plate-like material in certain regions, and is arranged fixedly by means of the at least one retaining means on the plate-like material for the purpose of securing the plate-like material to one of the two legs.

Abstract: A method for packaging a pack commodity, including providing a support element for supporting the pack commodity. The method also includes placing a first packaging material sheet onto the support element and disposing the pack commodity on the first packaging material sheet such that a portion of the first packaging material sheet comes to lie between the support element and the pack commodity, wherein the first packaging material sheet protrudes over the pack commodity. Next, a second packaging material sheet is placed onto an upper side of the pack commodity so that the second packaging material sheet protrudes over the pack commodity. The first packaging material sheet is joined, in some regions, to the second packaging material sheet. The first and the second packaging material sheets are adhesively joined in a respective, predetermined first region, along a periphery of the support element, such that they can be separated and re-joined.

Abstract: A method for packaging a pack commodity includes providing a support element for supporting the pack commodity and placing a first packaging material sheet onto the support element. The pack commodity is disposed on the first packaging material sheet such that a portion of the first packaging material sheet comes to lie between the support element and the pack commodity and protrudes over the pack commodity. A second packaging material sheet is placed onto an upper side of the pack commodity so that the second packaging material sheet protrudes over the pack commodity. The first packaging material sheet is joined, in some regions, to the second packaging material sheet. The first and the second packaging material sheet are adhesively joined in a respective, predetermined first region, along a periphery of the support element, such that they can be separated and re-joined.

Abstract: A method for packaging a pack commodity, including providing a support element for supporting the pack commodity. The method also includes placing a first packaging material sheet onto the support element and disposing the pack commodity on the first packaging material sheet such that a portion of the first packaging material sheet comes to lie between the support element and the pack commodity, wherein the first packaging material sheet protrudes over the pack commodity. Next, a second packaging material sheet is placed onto an upper side of the pack commodity so that the second packaging material sheet protrudes over the pack commodity. The first packaging material sheet is joined, in some regions, to the second packaging material sheet. The first and the second packaging material sheets are adhesively joined in a respective, predetermined first region, along a periphery of the support element, such that they can be separated and re-joined.

Abstract: A method for packaging a pack commodity a first step, a support element, for supporting the pack commodity. In a further step, a first packaging material sheet is placed onto the support element. The pack commodity is disposed on the first packaging material sheet such that a portion of the first packaging material sheet comes to lie between the support element and the pack commodity and protrudes over the pack commodity. Next, a second packaging material sheet is placed onto an upper side of the pack commodity so that the second packaging material sheet protrudes over the pack commodity. The first packaging material sheet is joined, in some regions, to the second packaging material sheet. The first and the second packaging material sheet are adhesively joined in a respective, predetermined first region, along a periphery of the support element, such that they can be separated and re-joined.

Abstract: A lift link gate having a plurality of tabular gate elements joined together by joints or hinges about a horizontally extending pivot axis. The gate slides in lateral guide tracks which guide the gate from a vertically closed position along an arcuate path into a horizontally open position. To avoid finger injuries in the deflection area of the gate elements, there is provided at the upper edge of each gate element a tooth-like projection substantially symmetrical relative to the gate center plane which has a front flank ascending up to the tooth tip and a rear flank descending from the tooth tip to the rear face of one of the gate elements and at the lower upper edge at least one depression complementary to the projection of a next adjacent element is provided, and upon pivoting of the adjacent elements in the arcuate path area of the guide track, an aperture region is provided with only a small aperture spacing which precludes the wedging of a finger therein.

Abstract: The invention relates to a lift link gate having a plurality of tabular gate elements 1, 1' which are joined together by joints or hinges 14 about horizontally extending pivot axes (a). The gate slides with the aid of guide pins or rollers 3 in lateral guide tracks 4 which guide the gate from a vertically closed position along an arcuate path into a horizontal open position.

Abstract: A sealing element for use with components of buildings, such as wall and floor elements, doors or the like, comprises an at least partly enclosed barrier strip consisting of a material which is self-foamable under the action of heat, e.g., a sodium silicate material. The sealing element comprises an integral plastic bar having at least one plastic strip portion, which has two opposite sealing surfaces, and the barrier strip extends along one sealing surface in a preferably dovetail-shaped groove or in a cavity of the plastic strip portion.