摘要:
An improved process for the hydrogen fluoride catalyzed alkylation of isoparaffins with olefins wherein better utilization of internal streams is achieved. Isoparaffins used as a stripping medium in the catalyst regeneration zone are reclaimed, free of a hydrogen fluoride phase, and are utilized as recycle isoparaffins to improve the quality of the alkylate product.
摘要:
A fail-safe timing circuit which includes a variable passive timing element and an active timer or timing device so as to control a device, for example, a fail-safe or B-relay such as is used in railroad signaling.
摘要:
A self-propelled remotely controlled pilot vehicle adapted for use on raiad tracks to monitor hazardous conditions and obstacles on the railroad tracks. The pilot vehicle precedes a train along the railroad tracks at a distance which will allow the train to come to a complete stop in the event the pilot vehicle encounters a hazardous condition on the track. The pilot vehicle is equipped with a sensor array which measures a variety of different parameters such as the presence of noxious gases, moisture in the atmosphere or at ground level, and breakage in one or both rails of the track. The pilot vehicle is also equipped with a television camera which provides a visual image of the railroad track ahead of the pilot vehicle to the engineer of the train. An infrared camera which is mounted on the front of the pilot vehicle generates an infrared image of the tracks and is used during darkness or in severe weather conditions to monitor the tracks for unsafe conditions or to detect animals or humans from body radiation. Information gathered by the pilot vehicle's sensor array is supplied to a computer on board the pilot vehicle and is transmitted back to the train to enable the train's engineer to be apprised of conditions existing on the tracks ahead of the train in order to have time to react to potential hazards and dangerous situations on the railroad tracks.
摘要:
Disclosed is a drawer which can be manufactured in kit form for compact shipping and is easily assembled using hand tools. The side, bottom, front and back of the drawer are configured such that these members contain grooves, notches and predrilled holes to assure ready assembly and securing of these members in assembling the drawer.
摘要:
The disclosed invention is to a bed frame assembly which is of an adjustable width to support various sizes of mattresses and springs. In general the assembly comprises two rectangular frame units positioned in spaced apart side by side relationship and held a predetermined distance apart by an adjustable spacer member or members. Storage drawers and a storage compartment are a part of the frame assembly.
摘要:
A settler-soaking apparatus for treating the effluent from an acid-catalyzed alkylation reaction is disclosed which comprises three interconnected vertically aligned chambers. The uppermost chamber possesses a hydrocarbon outlet means above an acid hydrocarbon inlet means and a downspout having an acid transfer means extending through and ending in the lower end of the middlemost chamber. The latter possesses a hydrocarbon outlet means at an elevated position with respect to the end of the acid transfer means in the downspout and a lower situated acid outlet means. The lowermost chamber possesses a multitude of spaced horizontal perforate trays and an acid hydrocarbon inlet means, which is in connection with the hydrocarbon outlet means of the uppermost chamber. The middle and lowermost chamber are in open communication via a chimney which extends upwardly into said middle chamber to provide a hydrocarbon outlet means at a point above the end of said downspout.