Abstract: A disconnector, including a crossmember, which has contact pins at its opposite ends, C-shaped contact sockets, which are aligned so as to correspond to the pins in order to receive them by insertion, along a trajectory that is circumferential with respect to a first rotation axis of the crossmember, which is substantially transverse thereto, a support of the crossmember that defines for it the first rotation axis, and a second rotation axis, which is substantially longitudinal to the crossmember, elements for the rotation of the crossmember about the first rotation axis and about the second rotation axis, where fixed contacts are connected electrically, in two separate regions, to supporting arms that belong to the sockets, and have a portion that is intermediate with respect to the two regions, is adapted for contact with the moving contacts, and divides the fixed contacts into two opposite conducting arms.

Abstract: A disconnector, including a crossmember, which has contact pins at its opposite ends, C-shaped contact sockets, which are aligned so as to correspond to the pins in order to receive them by insertion, along a trajectory that is circumferential with respect to a first rotation axis of the crossmember, which is substantially transverse thereto, a support of the crossmember that defines for it the first rotation axis, and a second rotation axis, which is substantially longitudinal to the crossmember, elements for the rotation of the crossmember about the first rotation axis and about the second rotation axis, where fixed contacts are connected electrically, in two separate regions, to supporting arms that belong to the sockets, and have a portion that is intermediate with respect to the two regions, is adapted for contact with the moving contacts, and divides the fixed contacts into two opposite conducting arms.

Abstract: A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The novel process according to the present invention comprises the steps of: a) catalytically oxidizing the corresponding aromatic precursors in liquid phase in the presence of gaseous oxygen; b) filtering the end product; c) recycling into the oxidation reactor at least part of the mother liquors resulting from the filtration stage, and is characterized by the fact that said steps from (a) to (c) are carried out in a closed and continuous cycle operating substantially under the same pressure and temperature conditions, preferably at 2-10 barg and 100-140° C.

Abstract: A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The process comprises a purification step in which the crude product resulting from the oxidation stage is supplied to a filling column containing a bed of material having a high adsorbent power with respect to hafnium and/or zirconium polyoxides, operating at a temperature of from 200 to 300° C. and at a pressure of from 30 to 90 barg.

Abstract: A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The novel process according to the present invention comprises the steps of: a) catalytically oxidizing the corresponding aromatic precursors in liquid phase in the presence of gaseous oxygen; b) filtering the end product; c) recycling into the oxidation reactor at least part of the mother liquors resulting from the filtration stage, and is characterized by the fact that said steps from (a) to (c) are carried out in a closed and continuous cycle operating substantially under the same pressure and temperature conditions, preferably at 2-10 barg and 100-140° C.

Abstract: A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The novel process according to the present invention comprises the steps of: a) catalytically oxidizing the corresponding aromatic precursors in liquid phase in the presence of gaseous oxygen; b) filtering the end product; c) recycling into the oxidation reactor at least part of the mother liquors resulting from the filtration stage, and is characterized by the fact that said steps from (a) to (c) are carried out in a closed and continuous cycle operating substantially under the same pressure and temperature conditions, preferably at 2-10 barg and 100-140° C.