Abstract: A unit for establishing contact between a liquid and a gas includes: a chamber having a vertical axis; a first series of contact sections disposed along the length of the vertical axis of the chamber; a second series of contact sections disposed along the length of the vertical axis of the chamber, alternated with the contact sections of the first series; and a liquid circulation system designed to circulate a liquid in the contact sections of the first series and in the contact sections of the second series in a separate manner.

Abstract: The invention relates to A process for the polymerisation of ethylene to produce a polyethylene resin in at least two slurry loop reactors connected to each other in series, the resin having a bimodal molecular weight distribution, a molecular weight distribution MWD of at least 7.0, an HLMI of from 1 to 100 g/10 min, and a density of from 0.935 to 0.960 g/cm3, wherein in one reactor 30 to 47 wt % based on the total weight of the polyethylene resin of a high molecular weight (HMW) polyethylene fraction is produced having an HL275 of from 0.05 to 1.8 g/10 min (the equivalent of HLMI of from 0.01 to 1.56 g/10 min), a density of from 0.925 to 0.942 g/cm3 and an MWD of at least 5.0, and in the other reactor a low molecular weight (LMW) polyethylene fraction is produced having an HLMI of from 10 to 1500 g/10 min and a density of from 0.960 to 0.975 g/cm3, in the presence of a Ziegler-Natta catalyst system.

Abstract: The present invention relates to a process for the conversion of an alcohols mixture (A) comprising about 20 w % to 100% isobutanol to make essentially propylene, comprising: a) introducing in a reactor (A) (also called the first reaction zone or low temperature reaction zone) a stream comprising the mixture (A), optionally water, optionally an inert component, b) contacting said stream with a catalyst (A1) in said reactor (A) at conditions effective to dehydrate: at least a portion of the isobutanol to essentially butenes, at least a portion of other alcohols, if any, to essentially olefins other than butene having the same carbon number as the alcohol precursor, c) recovering from said reactor (A) an effluent comprising: butenes, optionally olefins other than butene, water, optionally unconverted alcohols of the mixture (A), various hydrocarbons, and the optional inert component of step a), d) fractionating said effluent of step c) to remove a portion or all the water, unconverted alcohols, optionally th

Abstract: The present invention relates to a process for the conversion of an alcohols mixture (A) comprising about 20 w % to 100% isobutanol to make essentially propylene, comprising: a) introducing in a reactor (A) a stream comprising the mixture (A), mixed with a stream (D1) comprising olefins having 4 carbon atoms or more (C4+ olefins), optionally water, optionally an inert component, b) contacting said stream with a catalyst (A1) at a temperature above 500° C.

Abstract: The present invention is the use of a catalyst in a MTO process to convert an alcohol or an ether into light olefins wherein said catalyst comprises a phosphorus modified zeolite and is made by a method comprising the following steps in this order, a) the essential portion of the phosphorus is introduced into a zeolite comprising at least one ten members ring in the structure, b) the phosphorus modified zeolite of step a) is mixed with at least a component selected among one or more binders, salts of alkali-earth metals, salts of rare-earth metals, clays and shaping additives, b)* making a catalyst body from mixture b), c) an optional drying step or an optional drying step followed by a washing step, d) a calcination step, d*) an optional washing step followed by drying, e) optionally a small portion of phosphorus is introduced in the course of step b) or b)* or at end of step b) or b)*.

Abstract: The present invention is a method to start-up a process to make expandable vinyl aromatic polymer pellets comprising, a) providing a pelletizer (S) containing means to introduce the molten vinyl aromatic polymer comprising the expandable agent and optionally additives, a die plate having a plurality of holes of small diameter, typically in the range 0.8 to 1.

Abstract: The invention relates to a fire-extinguishing system of the high-pressure gas type, in which the gaseous extinguishing agent is stored under high pressure in at least one high-pressure gas bottle (1). The bottle valve operates, with interposition of a container attachment for the extinguishing gas, as a pressure-controlled, reducing and self-regulating control valve (3). By means of a predetermined control pressure which corresponds to the pressure in the extinguishing line system (2), the pressure of the extinguishing gas is reduced from, for example, 150 to 300 bar within the control valve to, for example, 60 bar. This makes it possible to dispense with all the high-pressure components used to date between the bottle valve and the extinguishing line system. Furthermore, a computational software is no longer required.

Abstract: Methods for supplying a catalyst to an ethylene slurry loop polymerization reactor and polymers formed therefrom are described herein. The method includes preparing a catalyst slurry in a preparation vessel. The slurry includes a hydrocarbon diluent liquid that contains a Ziegler-Natta catalyst. The catalyst slurry is supplied to a buffer vessel, withdrawn therefrom and supplied to a slurry loop polymerization reactor in which ethylene is polymerized. A co-catalyst is mixed with the Ziegler Natta catalyst in the slurry prior to supplying the catalyst slurry to the slurry loop polymerization reactor. The transfer of the catalyst slurry from the preparation vessel to the buffer vessel and the withdrawal of catalyst slurry from the buffer vessel are controlled to maintain the level of catalyst slurry in the buffer vessel substantially constant relative to the level of catalyst slurry in the preparation vessel.

Abstract: The invention is related to an automatically activated z-shaped model totem pole type display apparatus, used for visual communication, advertising and propaganda, for provision of information on products and services at points of sale and events, comprised by only four pieces, including two internal devices that form a Z-shape upon automatic activation and two external panels with the optional addition of a base and top plate for outdoor use, which apparatus may be easily assembled and disassembled by the end user, where in order to facilitate the transport and storage thereof upon disassembly, the apparatus may be flattened and folded one or more times to thereby assume what practically amounts to the shape of a folded plate and enabling the accommodation thereof in a carrying case.

Abstract: The present invention relates to nanocomposites comprising nanoparticles and a thermoplastic polymer composition, said nanocomposite being characterized by improved homogeneity, and in consequence by improved properties. Further, the present invention relates to a process for the production of such nanocomposites by first dispersing the nanoparticles in a dispersant and subsequent blending with a thermoplastic polymer composition.

Abstract: A method for testing a curing composition, comprising includes a curing composition; injecting the curing composition into a mold; curing the curing composition into a cured composition, in the mold at a controlled curing pressure; measuring at least one physical or mechanical property of the cured sample at a controlled test pressure, in the mold; the mold being rigid relatively to the cured sample during the curing step.

Abstract: A process for upgrading heavy hydrocarbonaceous feedstocks in at least one hydroconversion reactor for hydroconversion of the heavy hydrocarbonaceous feedstocks and in at least one hydrotreatment reactor for hydrotreatment of the heavy hydrocarbonaceous feedstocks, comprising the preparation of two or more catalysts, each catalyst being prepared from one or more catalyst precursor in at least one specific preparation reactor, the catalyst precursor containing at least one transition metal selected from group IIA, IIIB, IVB, VB, VIB, VIIB, VIII, IB or IIB of the periodic table of elements, and each preparation reactor feeding one or more hydroconversion or hydrotreatment reactor, each catalyst contained in preparation reactors being dedicated to hydroconversion or hydrotreatment of the feedstocks.

Abstract: The present invention is the use of a catalyst to convert an alcohol into light olefins in a dehydration process wherein said catalyst comprises a phosphorus modified zeolite and is made by a method comprising the following steps in this order, a) the essential portion of the phosphorus is introduced into a zeolite comprising at least one ten members ring in the structure, b) the phosphorus modified zeolite of step a) is mixed with at least a component selected among one or more binders, salts of alkali-earth metals, salts of rare-earth metals, clays and shaping additives, b)* making a catalyst body from mixture b), c) an optional drying step or an optional drying step followed by a washing step, d) a calcination step, d*) an optional washing step followed by drying, e) optionally a small portion of phosphorus is introduced in the course of step b) or b)* or at end of step b) or b)*.

Abstract: A water treatment method includes: filtering water in a membrane filtration unit including at least one membrane filtration module; collecting a permeate and collecting a retentate at the outlet of the membrane filtration module; withdrawing solid materials and/or hydrocarbons contained in the retentate, in order to provide a treated retentate; recycling the treated retentate at the inlet of the membrane filtration module; providing a treated water flow from the permeate from membrane filtration module(s). An installation adapted for applying this method is also provided.

Abstract: An injection stretch blow moulded container prepared essentially from polyethylene prepared in the presence of a chromium-based catalyst system, the polyethylene having a density of from 0.950 to 0.965 g/cm3, measured following the method of standard test ASTM 1505 at a temperature of 23° C., a melt index MI2 of from 0.5 to 5 g/10 min, measured following the method of standard test ASTM D 1238 at a temperature of 190° C. and under a load of 2.16 kg, and a high load melt index HLMI of from 40 to 150 g/10 min, measured following the method of standard test ASTM D 1238 at a temperature of 190° C. and under a load of 21.6 kg, the container weighing from 10 to 150 g per dm3 of volume, when the container has a volume of less than 300 cm3, the container weighing from 10 to 80 g per dm3 of volume, when the container has a volume of at least 300 cm3.

Abstract: The present invention relates to the field of single site catalyst systems based on pyrrol-iminophenol, pyrrol-iminoalcohol or pyrrol-iminoamine complexes and suitable for oligomerising or homo- or co-polymerising ethylene and alpha-olefins.

Abstract: A homogenous blend comprising from 10% to 90% by weight of a metallocene catalyzed polyethylene (mPE) and from 90% to 10% by weight of styrene-butadiene block copolymers comprising from 5% to 40% by weight of 1,3 butadiene monomer units and from 60% to 95% by weight of styrene monomer unites. The blend of the invention is used to make peelable films for food packaging applications.

Abstract: A method for simulating a geological phenomenon which resulted in the formation of a geological region, comprising the following steps: (a) defining a model of the geological region, (b) receiving an observation of a given parameter of the geological region, (c) defining the relevant zone, for which the observation received in step (b) is relevant, (d) simulating the geological phenomenon based on the model, (e) estimating the value of the given parameter for the relevant zone of the model, (f) comparing the observation of the given parameter received in step (b) with the estimate of said parameter obtained in step (e), and (g) modifying a simulation parameter based on the results of the comparison in step (f).

Abstract: Process for separating gases from a fluidized gas/solid mixture, comprising at least one injection of gas and optionally at least one injection of solids into and at least one discharge of solids from said fluidized bed, a discharge for gas from the mixture characterized in that it comprises a step of separating the solids entrained by the gas by means of an internal placed in that portion of the fluidized mixture where the voidage is greater than 0.7, occupying less than 10% of the free cross section of the bed.

Abstract: The present invention relates to flame resistant vinyl aromatic polymer based compositions comprising, 1 to 30 parts by weight of a flame retardant, 0.5 to 15 parts by weight of antimony pentoxide as sole flame retardant aid, 0.1 to 2 parts by weight of an anti dripping agent, 0 to 5 parts by weight of additives, per 100 parts by weight of the vinyl aromatic polymer.