Patent application number | Description | Published |
20110178347 | DEVICE FOR CONTROLLING THE OPERATING CONDITIONS IN A CATALYTIC CRACKING UNIT WITH TWO RISERS - The invention concerns a process for the production of gasoline and for the co-production of propylene using a catalytic cracking unit comprising a catalyst regeneration zone and a reaction zone with two risers functioning in parallel under different severity conditions, the catalyst circulating between the regeneration zone and the reaction zone in two parallel circuits, a circuit termed the principal circuit comprising a first external catalyst cooling system, and a circuit termed the secondary circuit comprising a second external catalyst cooling system. | 07-21-2011 |
20110272326 | PROCESS FOR CATALYTIC CRACKING WITH A RECYCLE OF AN OLEFINIC CUT REMOVED UPSTREAM OF THE GAS SEPARATION SECTION IN ORDER TO MAXIMIZE PROPYLENE PRODUCTION - The present invention describes a process for the production of gasoline and for the co-production of propylene employing a catalytic cracking unit having at least one principal reactor operating in riser mode or in downer mode, processing a conventional heavy feed, and in which the principal reactor further processes a feed primarily constituted by olefinic C4, C5 and C6 cuts introduced upstream or as a mixture with said heavy feed, said olefinic feed deriving from the inter-stage of the wet gas compressor, i.e. upstream of the separation section of the catalytic cracking unit. | 11-10-2011 |
20120014853 | NEW PROCESS FOR RECOVERING CO2 FROM REGENERATION FLUE GAS COMING FROM A CATALYTIC CRACKING UNIT - The invention describes an integrated process for capturing CO | 01-19-2012 |
20120091037 | FLUID CATALYTIC CRACKING PROCESS ADAPTED FOR THE TREATMENT OF FEEDS WITH A LOW CONRADSON CARBON, COMPRISING RECYCLING A COKING CUT EMPLOYING NOVEL TECHNOLOGY - The present invention describes a process for the production of gasoline in a fluid catalytic cracking unit having at least one principal reactor operating using feeds with a low Conradson Carbon and a high hydrogen content, said process comprising recycling a coking cut either to a side chamber branching off the stripper or within the stripper itself by means of a tubular vessel within said stripper. | 04-19-2012 |
20130137907 | PROCESS FOR THE PRODUCTION OF MIDDLE DISTILLATE FROM A CONVENTIONAL HEAVY FEEDSTOCK INCLUDING A STEP FOR SELECTIVE HYDROGENATION OF THE EX FCC HCO CUT - The present invention describes a process for the conversion of a heavy feedstock for improving the production and selectivity for middle distillate, said process using a catalytic cracking unit followed by a unit for selective hydrogenation of the heavy distillate cut (HCO) or any other cut rich in triaromatic compounds before recycling it to the FCC reaction zone in order to maximize the middle distillate cut. | 05-30-2013 |
20130152791 | PROCESS FOR CATALYTIC CRACKING ASSOCIATED WITH AN AMINE TREATMENT UNIT WITH IMPROVED CO2 BALANCE - The present invention describes a process for catalytic cracking associated with a unit for amine treatment of regeneration fumes from the catalytic cracking unit, which process uses at least one counter-pressure turbine to operate the cracked gas compressor and/or the regenerative air blower which can be used to improve the CO | 06-20-2013 |
20130211161 | PROCESS FOR CONVERTING A HEAVY FEED USING A CATALYTIC CRACKING UNIT AND A STEP FOR SELECTIVE HYDROGENATION OF THE GASOLINE OBTAINED FROM CATALYTIC CRACKING - The present invention describes a process for converting a heavy feed which is flexible for the production of propylene, gasoline and middle distillate. | 08-15-2013 |
20130281749 | PROCESS FOR CONVERTING A HEAVY FEED INTO MIDDLE DISTILLATE - The present invention describes a process for the conversion of a heavy feed which can be used to improve the selectivity for middle distillate. The process employs a catalytic cracking unit followed by one or more units for the oligomerization of C2 to C9 olefins which can preferentially produce an additional cut termed the middle distillate. The light portion of the oligomerate produced which cannot be incorporated into the middle distillate cut is recycled to the FCC unit for cracking into light olefins which are returned to the oligomerization units as a supplement to the olefins of the feed in order to preferentially form heavy oligomerates which can be incorporated into the middle distillate cut. | 10-24-2013 |
20140174985 | PROCESS FOR MILD HYDROCRACKING OF HEAVY HYDROCARBON FRACTIONS WITH OPTIMIZED THERMAL INTEGRATION FOR THE PURPOSE OF REDUCING GREENHOUSE GAS EMISSIONS - This invention describes a process for mild hydrocracking of heavy hydrocarbon fractions of the vacuum distillate type or the deasphalted oil type with optimized thermal integration for the purpose of reducing greenhouse gas emissions. | 06-26-2014 |
20140353211 | PROCESS FOR MILD HYDROCRACKING OF HEAVY HYDROCARBON FRACTIONS WITH OPTIMIZED THERMAL INTEGRATION - This invention describes a process for mild hydrocracking of heavy hydrocarbon fractions of the vacuum distillate type or the deasphalted oil type with optimized thermal integration for the purpose of reducing the cost of the exchangers that are used as well as greenhouse gas emissions. | 12-04-2014 |
Patent application number | Description | Published |
20090116031 | SOLID-STATE LASER GYRO HAVING ORTHOGONAL COUNTERPROPAGATING MODES - The field of the invention is that of solid-state laser gyros used in inertial control units. However, there are certain technical difficulties in producing laser gyros of this type that are due partly to the fact that the counterpropagating waves interfere with each other in the amplifying medium. A laser gyro according to the invention comprises at least one solid-state amplifying medium and an optical ring cavity comprising first optical means for imposing a first linear polarization state common to the two counterpropagating optical waves at the entrance and exit of the zone containing the amplifying medium and second optical means for imposing, within the amplifying medium, a second linear polarization state on the first optical wave and a third linear polarization state on the second optical wave, these polarization states being perpendicular. Thus, all the drawbacks associated with interference are eliminated. | 05-07-2009 |
20100123901 | Solid State Gyrolaser with Controlled Optical Pumping - The general field of the invention is that of gyrolasers comprising at least one ring-shaped optical cavity comprising at least three mirrors, a solid state amplifying medium pumped by a laser diode whose optical emission power is determined by a current supply source, the cavity and the amplifying medium being such that two so-called contra-rotating optical modes propagate in opposite directions to each other within the said optical cavity, the gyrolaser being a class B gyrolaser, the gyrolaser also comprising means of measuring the difference in optical frequency existing between the two optical modes. The gyrolaser comprises means of measuring the total optical power circulating in the optical cavity and first means of control of the current delivered by the supply source in such a way as to maintain the total optical power substantially constant in a narrow spectral band centred on the relaxation frequency of the laser. | 05-20-2010 |
20100265513 | Solid-state multioscillator ring laser gyro using a <100>-cut crystalline gain medium - A multioscillator ring laser gyro includes an optical ring cavity, a solid-state amplifying medium and a measurement device arranged in such a way that a first linearly polarized propagation mode and a second linearly polarized propagation mode, perpendicular to the first mode, propagate in a first direction in the cavity and in such a way that a third linearly polarized propagation mode parallel to the first mode and a fourth linearly polarized propagation mode parallel to the second mode propagate in the opposite direction. The amplifying medium is a crystal of cubic symmetry having an entry face and an exit face, the crystal being cut so that said faces are approximately perpendicular to the <100> crystallographic direction, the various modes propagating in directions approximately perpendicular to said faces. | 10-21-2010 |
20110071787 | STABILIZED SOLID-STATE GYROLASER - Solid-state gyrolaser having a device for stabilizing the intensities making it possible to maintain equilibrium of the two counter-propagating modes having at least a means for calculating a rotation measurement (Ω, IΩ) of the gyrolaser on the basis of the counter-propagating modes having a frequency difference (Δνmes) between them, by assuming that the frequency difference (Δνmes) between the two counter-propagating modes is induced only by the rotation of the cavity. The gyrolaser also includes a means for measuring the control command (Co), a means for storing a behaviour model (Mo) of a frequency bias (Δνb) induced by the device for stabilizing the intensities, as a function of the control command, a means for calculating the frequency bias (Δνb) induced by the device for stabilizing the intensities, on the basis of the value of the control command (Co) and the model (Mo), a means for calculating the bias (ΔΩb, ΔIΩb) in the rotation measurement (Ω, IΩ), induced by the frequency bias (Δνb), and a means for compensating for the bias (ΔΩb, ΔIΩb) in the rotation measurement (Ω, IΩ). | 03-24-2011 |
20110194119 | SOLID-STATE LASER GYRO OPTICALLY ACTIVE THROUGH ALTERNATING BIAS - The field of the invention is that of solid-state laser gyros used for the measurements of rotation speed or relative angular positions. This type of equipment is notably used for aeronautical applications. The object of the invention is to complete the optical devices necessary to control the instability of lasers by specific optical devices enabling elimination of the dead zone and of population inversion gratings exiting in the amplifying medium. An “all optical” solid-state laser is hence obtained without moveable parts, stable and without a dead zone. To this end, the laser gyro according to the invention comprises notably and optical assembly enabling a nonreciprocal optical phase-shift to be introduced between the counterpropagating modes; and control means allowing the phase-shift amplitude to be varied periodically around a mean value that is very approximately zero. | 08-11-2011 |
20110235047 | Laser Gyro Having a Solid-State Amplifying Medium and an Optical Ring Cavity - A laser gyro having a solid-state amplifying medium and an optical ring cavity includes an assembly encompassing the optical cavity and able to experience an oscillating rotational motion, as well as at least one external optical device for longitudinal injection of energy into the solid-state amplifying medium. The laser gyro also includes a fixing assembly adapted for translationally and rotationally binding said assembly encompassing the optical cavity and said external optical device for longitudinal injection of energy. | 09-29-2011 |
20110273720 | Multi-Oscillator Solid-State Laser Gyro Passively Stabilized by a Frequency-Doubling Crystal Device - A laser gyro for measuring the angular velocity or the angular position relative to a defined rotation axis includes: an optical ring cavity; a solid-state amplifying medium; and a non-reciprocal magneto-optic device; which are arranged so that four linearly polarized propagation modes can propagate within the cavity, the magneto-optic device introducing a frequency bias between the modes propagating in a first direction and the modes propagating in the opposite direction. In the device, the cavity also includes a stabilizer device for stabilizing the intensity of the four propagation modes at substantially equivalent levels, said device comprising at least one optical element made of a non-linear crystal of the frequency-doubling type. | 11-10-2011 |