Abstract: A method is described for controlling instability of operation in a de-ethanizer tower (13) in the gas recovery unit in fluid catalytic cracking units and delayed coking units. The method comprises the step of intervening in the de-ethanizer tower (13) when instability occurs in it, and adjusting the material balance of water in such a way that the excess of water in the feed load stream (9) is removed only as an azeotrope. The intervention is performed by introducing into the feed load stream (9) of the de-ethanizer tower (13) a volume fraction (18) of a flow of hydrocarbon, which may be either dry hydrocarbons or hydrocarbons with a low level of water content.

Abstract: A process of delayed coking with modified feedstock is described maximising the volume of diesel oil and minimising the volume of coke produced by means of feedstock which comprises, in a first embodiment of the invention: the bottom product (8) of the vacuum distillation tower (6), known in the prior art as vacuum residuum, and a fraction (7?) of heavy vacuum gas oil (7) obtained in the aforesaid vacuum distillation. In a second embodiment of the present invention the bottom residuum (5) proceeding from the atmospheric distillation tower (2), known in the prior art as atmospheric residuum, is employed as feedstock of a Delayed Coking Unit (9).

Abstract: A method is described for controlling instability of operation in a de-ethanizer tower (13) in the gas recovery unit in fluid catalytic cracking units and delayed coking units. The method comprises the step of intervening in the de-ethanizer tower (13) when instability occurs in it, and adjusting the material balance of water in such a way that the excess of water in the feed load stream (9) is removed only as an azeotrope. The intervention is performed by introducing into the feed load stream (9) of the de-ethanizer tower (13) a volume fraction (18) of a flow of hydrocarbon, which may be either dry hydrocarbons or hydrocarbons with a low level of water content.

Abstract: A process is described for production of Bio-Oil by delayed coking with modified feedstock, in which the feed of the conventional coke unit envisages, in addition to the usual fresh feed of hydrocarbon (vacuum residue, atmospheric residue etc.), the feeding of a biomass for coprocessing. Said biomass can be selected from the group comprising sugar cane straw, sugar cane bagasse, castor seed cake, coconut shells, rice husks, raw soya, castor seed, canola, oil palm, and cottonseed oils, and oils and fats of animal origin, which can be used separately, or as mixtures thereof in any proportions.

Abstract: A process of delayed coking with modified feedstock is described maximising the volume of diesel oil and minimising the volume of coke produced by means of feedstock which comprises, in a first embodiment of the invention: the bottom product (8) of the vacuum distillation tower (6), known in the prior art as vacuum residuum, and a fraction (7?) of heavy vacuum gas oil (7) obtained in the aforesaid vacuum distillation. In a second embodiment of the present invention the bottom residuum (5) proceeding from the atmospheric distillation tower (2), known in the prior art as atmospheric residuum, is employed as feedstock of a Delayed Coking Unit (9).

Abstract: A process is described of delayed coking optimized for greater yield of diesel oil from coke by means of modifications to the feedstock in a Delayed Coking Unit. According to the present invention in a first embodiment of the invention the feedstock includes the bottom product of the vacuum distillation tower, known in the prior art as vacuum residuum and the heavy gas oil from coke obtained in the fractionation tower and recycled to comprise the aforesaid combined feedstock. In a second embodiment of the present invention the feedstock consists of: the bottom residuum proceeding from the atmospheric distillation tower, known in the prior art as atmospheric residuum, and heavy gas oil from coke obtained in the fractionation tower and recycled to comprise the aforesaid feedstock of the unit.

Abstract: A process for the fluid catalytic cracking of heavy feeds under a heat balance regime is described, where one or more catalyst coolers external to the regenerator cool a stream of regenerated catalyst. A portion of said stream returns to the regenerator and a portion of the cooled regenerated catalyst is admixed to the non-cooled regenerated catalyst at a temperature substantially lower than the regenerator temperature, said admixture being brought into contact with the hydrocarbon feed to be cracked. As a result, the control of the catalyst circulation is rendered independent from the heat balance of the unit, with minimization of the thermal cracking, and therefore lower coke and fuel gas products.

Abstract: The subject of the invention is a plate-type heat exchanger including a leaktight vessel (1) of elongate shape divided transversely into at least two independent segments and a plate bundle (3) arranged in the leaktight vessel (1) and formed by a stack of metal plates which are equipped with corrugations defining gaps between them. One gap in two forms a longitudinal main circuit for a first fluid A stretching along the entire length of the plate bundle (3), and the other gaps are divided transversely in order to form at least two secondary and independent circuits for the circulation of a second fluid B and at least one third fluid C and D perpendicular to the direction of circulation of the first fluid A.