Abstract: Process for the preparation of (co) polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one oxo-nitrogenated complex of cobalt having general formula (I), wherein: —R1 and R2, equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally halogenated; cycloalkyl groups optionally substituted; aryl groups optionally substituted; —Y represents an oxygen atom; or a group —N—R3 wherein R3 represents a hydrogen atom, or it is selected from linear or branched C1-C20 preferably C1-C15, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted-; aryl groups optionally substituted; or, when Y represents a group —N—R3, R2 and R3 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromati

Abstract: An oxo-nitrogenated complex of lanthanides having general formula (I) or (II). Said oxo-nitrogenated complex of lanthanides having general formula (I) or (II) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Abstract: Process for the preparation of (co) polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one bisimine complex of cobalt having general formula (I) wherein: —n is 0 or 1; —Y represents a group —CR?R?— wherein R? and R?, equal to or different from each other, represent a hydrogen atom; or a linear or branched C1-C20, preferably C1-C15, alkyl group; or a divalent aromatic group optionally substituted; —R1 and R2, equal to or different from each other, represent a hydrogen atom; or they are selected from a linear or branched Ci-C2o/preferably C1-C15, alkyl group optionally halogenated, cycloalkyl groups optionally substituted; or R1 and R2 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C1-C20, preferably C1-C15, alkyl groups, said cycle opt

Abstract: The present invention relates to an oxo-nitrogenated complex of cobalt having the general formula (I) wherein the residues R1, R2, R3, X1 and X2 are as defined in the claims. Said oxo-nitrogenated complex of cobalt having general formula (I) can be advantageously used in a catalytic system for the (co) polymerization of conjugated dienes.

Abstract: Process for the preparation of (co)polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one bis-imino-pyridine complex of cobalt having general formula (I): wherein: R2 and R3, equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C1-C20 preferably C1-C15, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; R1 and R4, different from each other, represent a hydrogen atom; or they are selected from linear or branched C1-C20 preferably C1-C15, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; arylalkyl groups; or R1 and R2 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linea

Abstract: A bis-imine complex of lanthanides having general formula (I): Said bis-imine complex of lanthanides having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Abstract: A bis-imine pyridine complex of lanthanides having general formula (I). Said bis-imine pyridine complex of lanthanides having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Abstract: A bis-imine pyridine complex of lanthanides having general formula (I): Said bis-imine pyridine complex of lanthanides having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Abstract: A description follows of random butadiene-isoprene copolymers with a trans-1,4 structure, having a butadiene/isoprene molar composition ranging from 98/2 to 32/68, the above copolymers being crystalline or amorphous depending on the isoprene content. The process for the preparation of the above copolymers is also described, in the present of a catalytic system which comprises: (a) a first component consisting of a vanadium compound selected from: (a1) compounds having general formula (Ia) VO(L)n(X)m wherein n is an integer from 1 to 3 and m ranges from zero to 2, n+m being equal to 2 or 3; (a2) compounds having general formula (Ib) V(L)p(X)q wherein p is an integer from 1 to 4, q ranges from zero to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand and X is a halogen, preferably Chlorine; (b) a second component selected from aluminoxanes and relative derivatives.

Abstract: A description follows of random butadiene-isoprene copolymers with a trans-1,4 structure, having a butadiene/isoprene molar composition ranging from 98/2 to 32/68, the above copolymers being crystalline or amorphous depending on the isoprene content. The process for the preparation of the above copolymers is also described, in the present of a catalytic system which comprises: (a) a first component consisting of a vanadium compound selected from: (a1) compounds having general formula (Ia) VO(L)n(X)m wherein n is an integer from 1 to 3 and m ranges from zero to 2, n+m being equal to 2 or 3; (a2) compounds having general formula (Ib) V(L)p(X)q wherein p is an integer from 1 to 4, q ranges from zero to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand and X is a halogen, preferably Chlorine; (b) a second component selected from aluminoxanes and rclativc dcrivativcs.

Abstract: A condensing plant (10) comprises a steam receiving inlet manifold (11) connected to one end of tube nests (14) externally grazed by air for therein achieving the at least partial steam condensation. At their opposite end the tubes (14) are gathered into at least one outlet manifold (15) for the condensed liquid. Each outlet manifold (15) is connected by a vertically-extending duct (17) to a vertical rain-fall element (19, 20) opening at the lower part thereof into a collection tank (21). The collection tank (21) is supplied with steam from the inlet manifold (11) so that said steam moves up along the vertical element (20) for heating of the liquid falling thereinto.