Abstract: A sliding platform with an outrigger attaches to a ladder for stabilization by urging the outrigger against the underside of a structure (e.g., an eave). The device prevents the ladder from sliding or falling away from the structure. The device is adjustable from right to left to accommodate an angle of the engaged underside.

Abstract: A process for cooling a hot reaction gas, as formed, in the preparation of phthalic anhydride by oxidation of o-xylene with hot air in a reactor (213), to a predetermined inlet temperature for introduction into a separator (221), in which the separation into crude phthalic anhydride and air is then effected, is described. A simple and economical design, which can be used for comparable processes, too, of a system for cooling the hot reaction gas, which simultaneously gives rise to low maintenance costs, is obtained by locating upstream of the separator (221) a heat exchanger (227) through which a cooling medium flows, the hot reaction gas being passed through the heat exchanger (227) for interaction with the cooling medium. Especially such a system comprises in addition to a main reactor (213) a downstream reactor (241), which my have a means for intermediate cooling (243), and the gaseous cooling medium leaving the heat exchanger 227 will be fed to the main reactor (213) as reactant.

Abstract: A process for cooling a hot reaction gas, as formed, in the preparation of phthalic anhydride by oxidation of o-xylene with hot air in a reactor (213), to a predetermined inlet temperature for introduction into a separator (221), in which the separation into crude phthalic anhydride and air is then effected, is described. A simple and economical design, which can be used for comparable processes, too, of a system for cooling the hot reaction gas, which simultaneously gives rise to low maintenance costs, is obtained by locating upstream of the separator (221) a heat exchanger (227) through which a cooling medium flows, the hot reaction gas being passed through the heat exchanger (227) for interaction with the cooling medium. Especially such a system comprises in addition to a main reactor (213) a downstream reactor (241), which my have a means for intermediate cooling (243), and the gaseous cooling medium leaving the heat exchanger 227 will be fed to the main reactor (213) as reactant.

Abstract: A process for cooling a hot reaction gas, as formed, in the preparation of phthalic anhydride by oxidation of o-xylene with hot air in a reactor (213), to a predetermined inlet temperature for introduction into a separator (221), in which the separation into crude phthalic anhydride and air is then effected, is described. A simple and economical design, which can be used for comparable processes, too, of a system for cooling the hot reaction gas, which simultaneously gives rise to low maintenance costs, is obtained by locating upstream of the separator (221) a heat exchanger (227) through which a cooling medium flows, the hot reaction gas being passed through the heat exchanger (227) for interaction with the cooling medium. Especially such a system comprises in addition to a main reactor (213) a downstream reactor (241), which my have a means for intermediate cooling (243), and the gaseous cooling medium leaving the heat exchanger 227 will be fed to the main reactor (213) as reactant.