Abstract: Unipolar or multipolar electrical plug connectors include contact carriers having contact chambers, into which contact elements can be inserted. These contact elements latch with so-called snap-on lances. In the present SYSTEM, the latching is produced by a part of the contact element with a snap-on lance, a smooth outer geometry of the contact element being present in the assembled state, but by latching of a non-resilient snap-on lance within the contact chamber. Consequently, the advantages of the snap-on lance locking mechanism unite with those of the clean-body construction.

Abstract: An electrical connector in the form of a vibrationally stressed socket contact for producing an electrical plug connection, in particular in the automotive field. These electrical connectors are made up of an inner contact part and an external retention spring. The inner part itself includes contact lamellae, which rest against a mating component, preferably a knife blade, at a contact point. In order to ensure that the contact reliability is increased by optimum, normal contact force in each contact lamella, even in the case of tilting or vibrating or wobbling mating components (knife blades), the contact part 6 has at least three contact lamellae pointing away from a center segment, each of the contact lamellae having at least one contact point for producing an electrical plug connection to a knife blade. In the state of a produced, electrical plug connection, the free ends of the contact lamellae rest on support elements, which are designed to be a part of the external retention spring.

Abstract: An electrical connector in the form of a vibrationally stressed socket contact for producing an electrical plug connection, in particular in the automotive field. These electrical connectors are made up of an inner contact part and an external retention spring. The inner part itself includes contact lamellae, which rest against a mating component, preferably a knife blade, at a contact point. In order to ensure that the contact reliability is increased by optimum, normal contact force in each contact lamella, even in the case of tilting or vibrating or wobbling mating components (knife blades), the contact part 6 has at least three contact lamellae pointing away from a center segment, each of the contact lamellae having at least one contact point for producing an electrical plug connection to a knife blade. In the state of a produced, electrical plug connection, the free ends of the contact lamellae rest on support elements, which are designed to be a part of the external retention spring.

Abstract: A process is provided for separating and recovering solid, metal catalysts from reaction mixtures in which they are dispersed, with cross-flow filtration using membrane separation devices. The process is particularly useful for separating gelatinous catalyst sludges, e.g., nickel hydroxide, used in oxidizing diacetone sorbose.

Abstract: A process for preparing diacetoneketogulonic acid comprises oxidizing diacetonesorbose in two or more oxidizing steps using different oxidizing agents in each step. In preferred embodiments the first oxidation is done electrochemically or using air and the second oxidation is via hypochlorite treatment.

Abstract: A process for preparing diacetone-ketogulonic acid comprises oxidizing diacetonesorbose to diacetone-ketogulonic acid to an extent of about 30-95% by electrochemical oxidation or O.sub.2 oxidation; electrodialysing the resultant reaction solution to separate the pure diacetoneketogulonic acid from the unoxidized diacetonesorbose; and recycling the unoxidized diacetone-sorbose to the oxidation step.

Abstract: A process is provided for preparing riboflavin from D-glucose in good yield and under efficient conditions.

Abstract: Diacetone-2-ketogulonic acid is prepared by electrochemical oxidation of diacetone-sorbose in an aqueous alkaline medium in the presence of 0.001 to 1% of surfactant.