Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J29/00—Catalysts comprising molecular sieves
  • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
  • B01J29/084—Y-type faujasite
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
  • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
  • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
  • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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  • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
  • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
  • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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  • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
  • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
  • B01J20/16—Alumino-silicates
  • B01J20/18—Synthetic zeolitic molecular sieves
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  • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
  • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
  • B01J20/16—Alumino-silicates
  • B01J20/18—Synthetic zeolitic molecular sieves
  • B01J20/183—Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
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  • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
  • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
  • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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  • B01J20/30—Processes for preparing, regenerating, or reactivating
  • B01J20/3007—Moulding, shaping or extruding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J20/30—Processes for preparing, regenerating, or reactivating
  • B01J20/3028—Granulating, agglomerating or aggregating
• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J20/30—Processes for preparing, regenerating, or reactivating
  • B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
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  • B01J20/30—Processes for preparing, regenerating, or reactivating
  • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
  • B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
  • B01J20/3293—Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
  • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
  • B01J21/08—Silica
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/00—Catalysts comprising molecular sieves
  • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
  • B01J29/082—X-type faujasite
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/60—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L, as exemplified by patent document US3216789
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
  • B01J29/7007—Zeolite Beta
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
  • B01J29/7011—MAZ-type, e.g. Mazzite, Omega, ZSM-4 or LZ-202
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
  • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
  • B01J29/7015—CHA-type, e.g. Chabazite, LZ-218
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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  • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
  • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
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  • B01J29/7019—EMT-type, e.g. EMC-2, ECR-30, CSZ-1, ZSM-3 or ZSM-20
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J29/7038—MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J29/82—Phosphates
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
  • B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
  • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/00034—Physico-chemical characteristics of the mixtures
  • C04B2111/00129—Extrudable mixtures
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W30/00—Technologies for solid waste management
  • Y02W30/50—Reuse, recycling or recovery technologies
  • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

• the present invention relates to the field of zeolites, in particular, that of their shaping for use in industrial applications for catalysis, storage or separation. More specifically, this invention relates to a new zeolite material formulation using a binder formulation comprising at least one hydraulic binder. The present invention also relates to the method of preparation of the zeolite shaped.
• zeolites are understood to mean microporous crystalline solids for which their structure is based on a three-dimensional and regular sequence of T0 4 tetrahedra, the element T is generally Si 4+ or Al 3+ but other elements as B, P, Ge, Ga, Ti or Fe may also be incorporated each oxygen being common to two tetrahedra. Water molecules and cations (alkaline, alkaline earth) compensating for the negative charge of the mineral framework are generally present within the microporosity.
• zeolites we can give without being exhaustive the following list: zeolite X, zeolite Y, ZSM-12, mordenite, zeolite A, zeolite P, zeolite beta, ZSM-5, EMC -2, mazzite, boggsite, gismondite, heulandite , chabasite, LTL, MCM-22, SAPO-31, A1PO-4, GaPO-4, VPI-5.
• the shaping of zeolites is generally approached by means of compaction, extrusion or granulation processes with or without additives.
• the presence of additives is necessary to improve the qualities of the final material in terms of mechanical strength.
• the additives generally used for the zeolite forming are the hydroxyl forms of alumina such as for example boehmite, silicas or clays.
• additives must be added at levels generally greater than 20% by weight to obtain the desired strength, but at the expense of the pore volume of the material.
• An object of the present invention is to provide a new material comprising at least one zeolite shaped with at least one hydraulic binder, preferably by pelletizing in the presence of a solvent or by extrusion, said material having increased properties, especially in term of mechanical resistance and also being resistant to a temperature rise compatible with the zeolite.
• Another object of the present invention is to provide a process for preparing said material according to the invention, said obtained material having good mechanical strength and being adapted to its use in the presence of a solvent and therefore in an industrial process over long periods of time. periods. Summary of the invention
• the present invention relates to a material comprising at least one zeolite shaped with a binder formulation comprising at least one hydraulic binder.
• the present invention also relates to a process for preparing said material according to the invention comprising at least the following steps:
• An advantage of the present invention is to provide a preparation method for obtaining a material comprising at least one zeolite shaped with a binder formulation comprising at least one hydraulic binder, said material having increased properties, especially in term of mechanical resistance and being resistant to a rise in temperature, which makes it possible to envisage the implementation of said material in processes in the presence of water or solvents and at relatively high temperatures.
• Another advantage of the present invention is to propose, in a preferred embodiment, a simplified method for preparing said material having increased properties, especially in terms of mechanical strength, not requiring a calcination step after the step of formatting, the absence of calcination step having no effect on the properties of the material obtained.
• Another advantage of the present invention is to propose a process for the preparation of said material according to the invention, which can be implemented irrespective of the zeolite content, said process making it possible to obtain materials having good mechanical strength and therefore usable. in fixed bed.
• said material comprises at least one zeolite shaped with a binder formulation comprising at least one hydraulic binder.
• the said zeolite (s) used in the material according to the present invention are preferably chosen from zeolites X, Y, ZSM-12, mordenite, zeolite A, zeolite P, zeolite beta, ZSM-5, mazzite, boggsite, gismondite, heulandite, chabasite, LTL, MCM-22, EMC-1, SAPO-31, ⁇ 1 ⁇ -4, GaPO- 4 and VPI-5, alone or in mixture.
• said zeolite (s) used in the material according to the present invention are chosen from zeolites X, Y, ZSM-12, mordenite, zeolite A, zeolite P, zeolite beta, ZSM-5, SAPO-31, ⁇ 1 ⁇ -4, GaPO-4 and VPI-5, alone or in admixture.
• the said hydraulic binder (s) of the binder formulation with which said zeolite is shaped is advantageously chosen from among the well-known hydraulic binders. of the skilled person.
• said hydraulic binder (s) is (are) chosen from among Portland cement, aluminous cements such as, for example, molten cement, Ternal, SECAR 51, SECAR 71, SECAR 80, sulphoaluminous cements, plaster, phosphate-bonded cements such as, for example, phospho-magnesium cement, blast-furnace slag cements and the mineral phases chosen from alite (Ca 3 SiO 5 ), belite (Ca 2 SiO 4 ), alumino-ferrite (or brownméerite: semi-formula Ca 2 (Al, Fe 3+ ) 2 0 5 )), tricalcium aluminate (Ca 3 Al 2 O 6 ), calcium aluminates such as monocalcium aluminate (CaAl 2 O 4 ), calcium hex
• the said hydraulic binder (s) allows (the) shaping of said material according to the invention and gives it (s) a good mechanical strength.
• Said binder formulation comprising at least one hydraulic binder may also optionally comprise at least one source of silica.
• said binder formulation also comprises at least one silica source
• said silica source is advantageously chosen from precipitated silica and silica derived from by-products such as fly ash such as, for example, silico-aluminous particles or silico-calcium, and silica fumes.
• the silica source has a size less than 10 ⁇ , and preferably less than 5 ⁇ , more preferably less than ⁇ .
• the silica source is in amorphous or crystalline form.
• Said binder formulation comprising at least one hydraulic binder may also optionally comprise at least one organic adjuvant.
• said organic adjuvant is advantageously chosen from cellulose derivatives, polyethylene glycols, aliphatic monocarboxylic acids, alkylated aromatic compounds, sulphonic acid salts, fatty acids, polyvinyl pyrrolidone, polyvinyl alcohol, methylcellulose, polyacrylates, polymethacrylates, polyisobutene, polytetrahydrofuran, starch, polysaccharide-type polymers (such as xanthan gum), scleroglucan, derivatives thereof of hydroxyethylated cellulose type, carboxymethylcellulose, lignosulfonates and galactomannan derivatives, taken alone or as a mixture.
• Said organic adjuvant may also be chosen from all additives known to those skilled in the art.
• said material has the following composition:
• Said material according to the present invention is advantageously in the form of extrudates, balls or pellets.
• Said materials according to the invention have increased mechanical properties, especially in terms of mechanical strength, regardless of the zeolite content used, and are resistant to a rise in temperature, which makes it possible to envisage the implementation of said material in processes in the presence of water or solvents and at relatively high temperatures but still limited by the temperature resistance of the zeolite.
• Said materials according to the invention can therefore be used for applications in catalysis, gas storage and separation.
• said materials according to the invention have a mechanical resistance measured by the grain-to-grain crushing test, denoted EGG at least greater than 0.4 daN / mm and preferably at least greater than 0.9 daN / mm and preferably at least greater than 1 daN / mm.
• EGG mechanical resistance measured by the grain-to-grain crushing test
• the mechanical strength of the material according to the invention determined by the grain-to-grain (GGE) crushing test.
• GGE grain-to-grain
• ASTM D4179-01 standardized test that involves subjecting a material as a millimeter object, such as a ball, pellet, or extrusion, to a compressive force that causes the breakage. This test is therefore a measure of the tensile strength of the material. The analysis is repeated on a number of solids taken individually and typically on a number of solids between 10 and 200.
• the average of the lateral forces of rupture measured is the average EGG which is expressed in the case of the granules in unit of force (N), and in the case of extrusions in unit of force per unit length (daN / mm or decaNewton per millimeter of extruded length).
• the present invention also relates to a process for preparing said material according to the invention comprising at least the following steps:
• said step a) consists of mixing at least one powder of at least one zeolite, with at least one powder of at least one hydraulic binder and at least one solvent to obtain a mixture.
• at least one source of silica and optionally at least one organic adjuvant are also mixed during step a).
• At least said source of silica and optionally at least said organic adjuvant can be mixed in powder form or in solution in said solvent.
• Said solvent is advantageously chosen from water, ethanol, alcohols and amines.
• said solvent is water.
• the order in which the mixture of the powders of at least one zeolite, at least one hydraulic binder, optionally at least one source of silica and optionally at least one organic adjuvant in the case where they are mixed in the form of powders, with at least one solvent is achieved is indifferent.
• the mixture of said powders and of said solvent can advantageously be produced at one time. Additions of powders and solvent can also advantageously be alternated.
• said powders of at least one zeolite, at least one hydraulic binder, optionally at least one source of silica and optionally at least one organic adjuvant, in the case where they are mixed in form of powders, are first premixed, dry, before the introduction of the solvent.
• At least said source of silica and at least said organic adjuvant may previously be in solution or suspension in said solvent when said solvent is brought into contact with the powders of at least one zeolite and at least one a hydraulic binder. Contacting with said solvent leads to obtaining a mixture which is then kneaded.
• said mixing step a) is carried out by mixing, batchwise or continuously.
• step a) is advantageously carried out in a kneader preferably equipped with Z-arms, or with cams, or in any other type of mixer such as, for example, a planetary mixer.
• Said step a) of mixing makes it possible to obtain a homogeneous mixture of powdery constituents.
• said step a) is carried out for a period of between 5 and 60 min, and preferably between 10 and 50 min.
• the rotation speed of the arms of the kneader is advantageously between 10 and 75 revolutions / minute, preferably between 25 and 50 revolutions / minute.
• 1% to 99% by weight preferably from 5% to 99% by weight, preferably from 7% to 99% by weight, and very preferably from 10% to 95% by weight of at least one powder of at least one zeolite,
• step a) are introduced in step a), the weight percentages being expressed relative to the total amount of compounds and preferably powders introduced in said step a) and the sum of the amounts of each of the compounds and preferably powders introduced into said step a) being equal to 100%.
• said step b) consists in shaping the mixture obtained at the end of step a) of mixing.
• the mixture obtained at the end of step a) of mixing is advantageously shaped by extrusion or pelletization.
• step b) is advantageously carried out in a piston, single-screw or twin-screw extruder.
• an organic adjuvant may optionally be added in the mixing step a).
• the presence of said organic adjuvant facilitates extrusion shaping.
• Said organic adjuvant is described above and is introduced in step a) in the proportions indicated above.
• said mixing step a) may be coupled with the shaping step b) by extrusion in the same equipment.
• the extrusion of the mixture also called “kneaded paste” can be carried out either by extruding directly end of continuous mixer type bi-screw for example, or by connecting one or more batch kneaders to an extruder.
• the geometry of the die, which confers their shape to the extrudates can be chosen from the well-known dies of the skilled person. They can thus be, for example, cylindrical, multilobed, fluted or slotted.
• step a) the amount of solvent added in step a) of mixing is adjusted so as to obtain, at the end of this step and whatever the variant used, a mixture or a paste that does not flow but is not too dry to allow its extrusion under suitable pressure conditions well known to those skilled in the art and dependent on the extrusion equipment used.
• said extrusion forming step b) is carried out at an extrusion pressure greater than 1 MPa and preferably between 3 MPa and 10 MPa.
• the quantity of solvent used in the mixing step a) is adjusted in order to allow easy filling of the pelletizing dies and tabletting under suitable pressure conditions well known to those skilled in the art and dependent on the pelletizing equipment used.
• said pelletizing step b) is performed at a compression force greater than IkN and preferably between 2kN and 20kN.
• the geometry of the pelletizing matrix which confers their shape on the pellets, can be chosen from the matrices well known to those skilled in the art. They can thus be, for example, of cylindrical shape.
• the dimensions of the pellets (diameter and length) are adapted to suit the needs of the process in which they will be used.
• the pellets preferably have a diameter of between 0.3 and 10 mm and a diameter-to-height ratio of preferably between 0.25 and 10.
• the process for preparing said material according to the invention may also optionally comprise a step c) of maturation of the shaped material obtained at the end of step b).
• Said ripening step is advantageously carried out at a temperature of between 0 and 300 ° C., preferably between 20 and 200 ° C. and preferably between 20 and 150 ° C., for a duration of between 1 minute and 72 hours, preferably between 30 minutes and 72 hours, and preferably between 1 hour and 48 hours and more preferably between 1 and 24 hours.
• said maturation step is carried out in air and preferably in moist air with a relative humidity of between 20 and 100% and preferably between 70 and 100%. This step allows good hydration of the material necessary for a complete setting of the hydraulic binder.
• the shaped material resulting from the shaping step b) and having optionally undergone a c) stage of maturation does not undergo a final calcination step.
• the properties, especially in terms of mechanical strength, of the shaped material obtained at the end of the shaping step b) and possibly at the end of the curing step c) are not modified and remain very high.
• the shaped material resulting from the shaping step b) and possibly having undergone a c) stage of maturation can also undergo a step d) of calcination at a temperature of between 50.degree. and 500 ° C, preferably between 100 and 300 ° C for a period of between 1 and 6 h and preferably between 1 and 4h.
• This calcination step is particularly useful in order to eliminate the organic adjuvants used in order to facilitate the shaping of the material.
• the temperature of said calcination step d) is preferably between 50 ° C. and the degradation temperature of the zeolite or the most fragile of the zeolites used in the material according to the present invention, preferably between 150 and 350 ° C. a duration of between 1 and 6 h and preferably between 2 and 4 h.
• Said optional d) calcination step is advantageously carried out under a gaseous flow comprising oxygen, for example preferably the extrudates are calcined in dry air or with different humidity levels or else treated in temperature in the presence of a gaseous mixture comprising an inert gas, preferably nitrogen, and oxygen.
• the gaseous mixture used preferably comprises at least 5% by volume, and preferably at least 10% by volume of oxygen.
• Said calcination step is advantageously carried out in the case where the material obtained according to the present invention is used as a catalyst support in processes operating at high temperature. In this case, it is advantageous to treat the materials used at the temperature at which it will be subjected in the process.
• the material obtained is in the form of extrudates or pellets.
• said materials obtained are then, for example, introduced into equipment for rounding their surface, such as a bezel or other equipment allowing their spheronization.
• Said method of preparation according to the invention makes it possible to obtain materials according to the invention having mechanical strength values measured by grain-to-grain crushing greater than 0.4 daN / mm, preferably greater than 0.9 daN / mm and preferably greater than 1 daN / mm, regardless of the zeolite content used.
• the material obtained at the end of the preparation process according to the invention can be used for applications in catalysis, separation, purification, capture, storage, etc.
• Said material is brought into contact with the gaseous feedstock to be treated in a reactor, which can be either a fixed bed reactor, a radial reactor, or a fluidized bed reactor.
• the expected EGG value is greater than 0.9 daNj rim 1 , preferably greater than 1.0 daN: mm _1 .
• the Y zeolite powder is pelletized using an MTS compression machine instrumented in pressure and displacement and equipped with a system consisting of a matrix and punches and allowing the manufacture of compacts.
• the diameter of the device selected for these tests is 4 mm.
• the matrix is fed with zeolite Y powder and a force of 7 kN is applied to the system.
• the analysis of these compacts by X-ray diffraction shows a small loss of crystallinity induced by this shaping method which also results in a reduction of the specific surface area (which was 850 m 2 / g on the zeolite powder) .
• the pellets are easily destroyed by contact with a solvent (tests carried out with water and ethanol).
• Example 2 (zeolite Y shaped by extrusion according to the invention):
• zeolite Y the powders of zeolite Y (67% by weight), silica (5.8%), portland cement (Black label produced by Dyckerhoff) (22.4%) and methocel (K15M) (4.8%) are introduced and premixed in a Brabender brand kneader. The percentages weight are expressed relative to the total amount of powders introduced.
• the water is added dropwise until a paste is obtained and mixing is continued for 20 minutes.
• the paste obtained is then extruded on an MTS brand piston extruder using a 2 mm diameter cylindrical die.
• the extrudates are stored under ambient conditions during the time of setting the cement (48 hours).
• the extrudates obtained have an EGG value of 2.0 daN / mm and a S BET of 575 m 2 / g.
• Example 3 (zeolite Y formed by extrusion according to the invention: effect of post-treatment):
• Preparation of the solid comprising 67% zeolite Y the preparation is similar to that of Example 2, with the difference that the material shaped by extrusion then undergoes a maturation step at a temperature of 20 ° C. for 48 hours, under moist air comprising 100% weight of water.
• the mechanical strength is further improved with an EGG of 2.7 daN / mm.
• Example 4 (zeolite Y shaped by extrusion according to the invention):
• Preparation of the solid comprising 80.9% zeolite Y the method of preparation is identical to Example 2, with the difference that the mass proportions of the various components are: 11.4% portland cement (Black label produced by Dyckerhoff) , 2.9% of silica and 4.8% of methocel and the material shaped by extrusion then undergoes a maturation step at a temperature of 20 ° C for 48h, in moist air comprising 100% by weight of water.
• Example 5 zeolite Y formed by pelletizing according to the invention:
• the powders of zeolite Y (90% by weight), portland cement (Black label produced by Dyckerhoff) (5%) and methocel (K15M) (5%) are introduced and premixed in a Brabender brand mixer with 10% total weight of the water powders for 15 minutes.
• the mixture obtained is pelletized using an MTS brand compression machine instrumented in pressure and displacement and equipped with a system consisting of a matrix and punches and allowing the manufacture of compacts.
• the diameter of the device selected for these tests is 4 mm.
• a force of 7kN is applied to the system.
• the material shaped by pelletization is then subjected to a maturation stage at a temperature of 20 ° C. for 4 days, in moist air comprising 100% by weight of water.
• Example 6 zeolite Y shaped by extrusion according to the invention:
• Preparation of the solid comprising 95% zeolite Y the method of preparation is identical to Example 2, with the difference that the mass proportions of the various components are: 4% portland cement (Black label produced by Dyckerhoff) and 1% of methocel and that the shaped material then undergoes a maturation step at a temperature of 20 ° C for 48h, in moist air comprising 100% weight of water.
• the extrudates obtained have an EGG value of 1 daN / mm and an SBET of 800 m 2 / g.

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• 2013
  • 2013-11-18 FR FR1361278A patent/FR3013234B1/fr not_active Expired - Fee Related
• 2014
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