Abstract: Processes and reactor systems are provided for the conversion of oxygenated hydrocarbons to hydrocarbons, ketones and alcohols useful as liquid fuels, such as gasoline, jet fuel or diesel fuel, and industrial chemicals. The process involves the conversion of mono-oxygenated hydrocarbons, such as alcohols, ketones, aldehydes, furans, carboxylic acids, diols, triols, and/or other polyols, to C4+ hydrocarbons, alcohols and/or ketones, by condensation. The oxygenated hydrocarbons may originate from any source, but are preferably derived from biomass.

Abstract: A method for processing biomass comprising heating an aqueous slurry comprising biomass, water and a phosphate catalyst in a pressure vessel at a temperature of about 150° C. to about 500° C. to produce a mixture comprising a dispersion of an organic phase and an aqueous phase.

Abstract: A method for manufacturing a hydrocarbon oil, comprising: a first step wherein a feedstock oil containing an oxygen-containing organic compound and a water-insoluble chlorine-containing compound is brought into contact with a hydrogenation catalyst comprising a support containing a porous inorganic oxide and one or more metals selected from Group VIA and Group VIII of the periodic table supported on the support in the presence of hydrogen to generate a hydrocarbon oil and water in a vapor state by the hydrodeoxygenation of an oxygen-containing organic compound and convert the water-insoluble chlorine-containing compound into a water-soluble chlorine-containing compound; a second step wherein the water in the reaction product of the first step is maintained in a vapor state and the reaction product of the first step is brought into contact with a nitrogen-containing Brønsted base compound which has a boiling point at normal pressure of 100° C.

Abstract: A novel olefin production process of the invention can be established as an industrial and practical process of producing an olefin with high selectivity by directly reacting a ketone and hydrogen in a single reaction step. In particular, a novel olefin production process is provided in which propylene is obtained with high selectivity by directly reacting acetone and hydrogen. An olefin production process of the invention includes reacting a ketone and hydrogen at a reaction temperature in the range of 50 to 300° C. in the presence of a Cu-containing hydrogenation catalyst and a solid acid substance.

Abstract: Embodiments of this disclosure, among others, encompass methods for generating alkenes under mild thermolytic conditions that can provide almost total conversion of a precursor compound to an alkene without isomerization or the need to chromatographically purify the final product By selectively blocking the amino and carboxy groups of the de?vatized amino acid, the methods of the disclosure provide for the synthesis of a peptide having the vinylglycine moiety at either the carboxy or the amino terminus of the peptide The mild conditions for the thermolytic removal of an o-NO2-phenyl substituted aryl group ensure that there is minimal if any damage to thermally sensitive conjugates such as a peptide bearing the vinylglycine The methods of the present disclosure have practical applications for the preparation of unsaturated compounds under mild, thermolytic conditions.

Abstract: A method for hydroconversion of a combined feed of at least one low value petroleum derived hydrocarbon and at least one biorenewable feedstock in a hydroconversion reaction zone in the presence of a hydroconversion catalyst at hydroconversion reaction conditions for a period of time sufficient to form a hydroconversion reaction product.

Abstract: The present invention addresses the processing of waste and low-value products to produce useful materials in reliable purities and compositions, at acceptable cost, without producing malodorous emissions, and with high energy efficiency. In particular, the invention comprises a multi-stage process that converts various feedstocks such as offal, animal manures, municipal sewage sludge, tires, and plastics, that otherwise have little commercial value, to useful materials including gas, oil, specialty chemicals, and carbon solids. The process subjects the feedstock to heat and pressure, separates out various components, then further applies heat and pressure to one or more of those components. Various materials produced at different points in the process may be recycled and used to play other roles within the process. The invention further comprises an apparatus for performing a multi-stage process of converting waste products into useful materials, and at least one oil product that arises from the process.

Abstract: A process has been developed for producing diesel boiling range fuel from renewable feedstocks such as plant oils, animal fats and oils, and greases. The process involves treating a renewable feedstock by hydrogenating and deoxygenating to provide a diesel boiling range fuel hydrocarbon product. If desired, the hydrocarbon product can be isomerized to improve cold flow properties. A portion of the hydrocarbon product is recycled to the treatment zone to increase the hydrogen solubility of the reaction mixture.

Abstract: A process has been developed for producing diesel boiling range fuel from renewable feedstocks such as plant oils and animal oils, fats, and greases. The process involves treating a renewable feedstock by hydrogenating and deoxygenating i.e. decarboxylating, decarbonylating, and/or hydrodeoxygenating to provide a hydrocarbon fraction useful as a diesel boiling range fuel or diesel boiling range fuel blending component. If desired, the hydrocarbon fraction can be isomerized to improve cold flow properties. A portion of the hydrogenated and deoxygenated feedstock is selectively separated and then recycled to the treatment zone to increase the hydrogen solubility of the reaction mixture.

Abstract: A process is disclosed for the production of olefins including ethylene, propylene, and butanes from methyl amine. The process comprises a reaction whereby methyl amine produces the olefin and ammonia by pyrolysis. The reaction is carried out in the gas phase at a temperature in the range of 400° C. to 700° C.

Abstract: The invention relates to a process for obtaining a metalloaluminophosphate (MeAPO) molecular sieve comprising the following steps in the order given: a) providing a homogeneous solution containing sources of at least 2 of the following: aluminium (Al), phosphorous (P), metal (Me); b) adding a first MeAPO molecular sieve to the solution and modifying the pH before and/or after the addition of the first MeAPO molecular sieve to obtain an amorphous precursor; c) separating the amorphous precursor from the water; d) optionally washing and drying at a temperature below 450° C.

Abstract: The present invention is a process for making an olefin product from an oxygen-containing organic feedstock comprising: providing a mixture of said oxygen-containing feedstock, an hydrocarbon and optionally an inert diluent, contacting said mixture in a reaction zone having an inner surface (the MTO reactor) with a zeolitic catalyst at conditions effective to convert at least a part of the oxygen-containing organic feedstock to olefin products (the MTO reactor effluent), recovering a reactor effluent comprising light olefins, a heavy hydrocarbon fraction and undesired by-products, wherein: at least a part of the inner surface is passivated such that the undesired by-products are reduced by comparison with a non passivated inner surface and for one or more sulphur compound is co-injected with the said oxygen-containing feedstock and the hydrocarbon and said sulphur compound is capable to reduce the undesired by-products by comparison with a non injection of sulphur compound.

Abstract: The present invention provides a process for producing an olefin from a carboxylic acid having a ?-hydrogen atom or a derivative thereof using the compound containing iodine and at least one metal elements selected from the group consisting of Groups 6, 7, 8, 9, 10 and 11 metals as a catalyst.

Abstract: This invention is directed to a process for producing one or more olefins from an oxygenate feed. According to the invention, an oxygenate stream is provided and a recycle stream is added to the oxygenate stream to form a feed stream to an oxygenate-to-olefin conversion system. The recycle stream comprises (i.e., contains) propane and dimethyl ether.

Abstract: A process is disclosed for the production of olefins including ethylene, propylene, and butanes from methyl amine. The process comprises a reaction whereby methyl amine produces the olefin and ammonia by pyrolysis. The reaction is carried out in the gas phase at a temperature in the range of 400° C. to 700° C.

Abstract: A process has been developed for producing diesel boiling range fuel from renewable feedstocks such as plant oils, animal fats and oils, and greases. The process involves treating a renewable feedstock by hydrogenating and deoxygenating to provide a diesel boiling range fuel hydrocarbon product. If desired, the hydrocarbon product can be isomerized to improve cold flow properties. A portion of the hydrocarbon product is recycled to the treatment zone to increase the hydrogen solubility of the reaction mixture.

Abstract: This invention, in one embodiment, is drawn to a process for forming olefin product by contacting an oxygenate with an olefin-forming catalyst under supercritical conditions to form an olefin product. This invention also relates to methods for activating molecular sieve catalyst, regenerating molecular sieve catalyst, and forming and/or disposing a co-catalyst within a molecular sieve catalyst, each under supercritical conditions.

Abstract: The present invention relates to a process to make light olefins, in a combined XTO-OC process, from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock comprising: a) providing a catalyst comprising zeolitic molecular sieves containing 10 member and larger channels in their microporous structure, b) providing an XTO reaction zone, an OC reaction zone and a catalyst regeneration zone, said catalyst circulating in the three zones, such that at least a portion of the regenerated catalyst is passed to the OC reaction zone, at least a portion of the catalyst in the OC reaction zone is passed to the XTO reaction zone and at least a portion of the catalyst in the XTO reaction zone is passed to the regeneration zone; c) contacting said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the XTO reactor with the catalyst at conditions effective to convert at least a portion of the feedstock to form a XTO reactor effluent comprising light olefins and a

Abstract: The present invention relates to a method for the production of nanocrystalline nickel oxides as well as the nickel oxides produced by the method according to the invention and the use thereof as catalyst following reduction to nickel metal, in particular for hydrogenation reactions.

Abstract: A process is provided for the production of hydrocarbons that include olefins from synthesis gas containing at least one of carbon monoxide and or carbon dioxide wherein the synthesis gas is fed to a reactor in which a catalyst acts on the feed at a temperature of between 160° C. and 400° C. and a pressure of between 1 bar and 50 bar. The feed includes a compound containing one or both of nitrogen and phosphorous, such as ammonia and a phosphine, added to the reactor with the synthesis gas. The compound containing nitrogen typically constitutes at least 1 vol % and preferably of the order of 4 to 20 vol % or more of the feed. The carbonaceous gas may be carbon monoxide with a ratio of hydrogen to carbon monoxide in the synthesis gas of from 0.5:1 to 5:1. The catalyst is preferably a supported cobalt catalyst and may be modified with a promoter. The process produces an enhanced proportion of olefins, especially linear olefins, in the hydrocarbons produced.

Abstract: A process is presented for improving the quality of an oxygenate feedstream to an oxygenate to olefins conversion reactor. The process includes passing the feedstream to a fractionation column having a sufficient number of trays to remove the sodium in the form of sodium hydroxide. The fractionation column is also sized to have a sufficient number of trays to minimize the amount of oxygenates being passed out with the removed sodium hydroxide.

Abstract: In a method of synthesizing a silicoaluminophosphate molecular sieve, a synthesis mixture is prepared by combining a source of phosphorus and at least one organic directing agent; and then introducing a source of aluminum into the combination of the phosphorus source and organic directing agent, wherein the temperature of the combination is less than or equal to 50° C. when addition of the source of aluminum begins. After addition of a source of silicon, the synthesis mixture is heated to a crystallization temperature of between about 100° C. and about 300° C. and the molecular sieve is recovered.

Abstract: Processing schemes and arrangements for application of a dividing wall separation column in the processing of an effluent resulting from FCC processing modified for increased light olefin production. The dividing wall separation column desirably splits a naphtha feedstock produced or resulting from such modified FCC processing to produce or form a light fraction containing C5-C6 compounds, an intermediate fraction containing C7-C8 compounds and a heavy fraction containing C9+ compounds.

Abstract: A process for obtaining a catalyst composite comprising the following steps: a). selecting a molecular sieve having pores of 10-or more-membered rings b). contacting the molecular sieve with a metal silicate different from said molecular sieve comprising at least one alkaline earth metal and one or more of the following metals: Ga, Al, Ce, In, Cs, Sc, Sn, Li, Zn, Co, Mo, Mn, Ni, Fe, Cu, Cr, Ti and V, such that the composite comprises at least 0.1 wt % of silicate.

Abstract: This invention relates to a catalyst compound comprising a combination of a cyclic alkyl amino carbene ligand and a benzylidene both attached to a Group 8 metal, preferably ruthenium atom. This invention also relates to a process to make linear alpha-olefins comprising contacting a feed material and an optional alkene (such as ethylene) with the catalyst described above, wherein the feed material is a triacylglyceride, fatty acid, fatty acid alkyl ester, and/or fatty acid ester, typically derived from seed oil (e.g., biodiesel).

Abstract: This invention relates to a metathesis catalyst compound comprising an asymmetrically substituted N-heterocyclic carbene (NHC) metathesis catalyst and a process to make linear alpha-olefins comprising contacting a feed material and an optional alkene (such as ethylene) with said catalyst, where the feed material is a triacylglyceride, fatty acid, fatty acid alkyl ester, and/or fatty acid ester, typically derived from biodiesel.

Abstract: Catalysts comprising cobalt on a titania support are produced by mixing together particles of a solid titania support and an aqueous solution of cobalt amine carbonate, and heating to an elevated temperature sufficient to effect decomposition of the cobalt amine carbonate and precipitation of a cobalt species onto said support. The catalysts are useful in hydrogenation and Fischer-Tropsch reactions.

Abstract: The present invention provides a process for separating and disposing of catalyst in an oxygenate to olefins reaction system. Oxygenates are converted to olefins in a reactor in the presence of a catalyst having carbonaceous deposits, then effluent stream comprising the olefins is removed from the reactor. This effluent stream is entrained with a portion of the catalyst having carbonaceous deposits. The catalyst is separated from the effluent stream by contacting the effluent stream with a neutralized liquid quench medium to produce a catalyst containing stream. The carbonaceous deposits are incinerated and then the catalyst is recirculated to the reactor.

Abstract: A gas-solids reaction system is provided for improving product recovery in a multiple reactor reaction system. The solids of the product gas-solids flows from the multiple reactors are separated out in a separation vessel having a baffled transition zone. Additional product vapor is stripped from the solids as the solids pass through the baffled transition zone. The solids are then returned to the multiple reactors.

Abstract: A method of converting methanol feedstock to olefins is provided and includes contacting the methanol feedstock in a first conversion zone with a catalyst at reaction conditions effective to produce a first reaction zone effluent comprising DME, unreacted methanol and water, and recycling at least a portion of an overhead vapor product to the first conversion zone and/or to the second conversion zone.

Abstract: Isobutene is prepared by dissociation of MTBE in the gas phase, by a) fractional distillation of an MTBE-containing stream comprising feed MTBE (I) and a recycle stream (VIII) to give an MTBE-containing overhead stream (II) and a bottom stream (III) having a boiling point higher than MTBE, b) catalytic dissociation of the overhead stream (II) obtained in step a) to give a dissociation product (IV), c) separation by distillation of the dissociation product (IV) obtained in step b) into an overhead stream (V) comprising more than 90% by mass of isobutene and a bottom stream (VI) comprising diisobutene, MTBE and more than 50% of the methanol present in the dissociation product (IV), d) fractional distillation of the bottom stream obtained in step c) under conditions under which the methanol is obtained as bottom product (VII) and more than 99% of the MTBE is obtained in the overhead product (VIII), and e) recirculation of the overhead product (VIII) to step a).

Abstract: A process has been developed for producing diesel boiling range fuel or fuel blending component from renewable feedstocks such as plant oils and greases. The process involves treating a renewable feedstock by hydrogenating and deoxygenating i.e. decarboxylating and/or hydrodeoxygenating to provide a hydrocarbon fraction useful as a diesel fuel. The hydrocarbon fraction is isomerized to improve cold flow properties. At least one interstage stream of the hydrogenating and deoxygenating reaction zone is heat exchanged with the feed to the isomerization reaction zone, and/or the effluent of the hydrogenating and deoxygenating reaction zone is heat exchanged with the feed to the isomerization reaction zone.

Abstract: The invention covers a process for obtaining an alkaline earth or rare earth metal-P-modified molecular sieve (M-P-modified molecular sieve) comprising the following steps: a). selecting at least one molecular sieve selected from one of: a P-modified molecular sieve which contains at least 0.3 wt % of P obtained by dealuminating a molecular sieve in a steaming step, followed by a leaching step using an acid solution containing a source of P a molecular sieve which is modified with P during step b) by dealuminating the molecular sieve in a steaming step, followed by a leaching step using an acid solution containing a source of P thereby introducing at least 0.3 wt % of P b). contacting said molecular sieve with an alkaline earth or rare earth metal-containing compound (M-containing compound) to introduce at least 0.05 wt % of the alkaline earth or rare earth metal to the molecular sieve. The invention also covers a catalyst composite comprising: a).

Abstract: This invention relates to efficiently regenerating catalyst particles by minimizing the formation of localized “hot spots” and “cold spots” in a regeneration zone. Specifically this invention relates to a method for controlling regenerator temperature in an oxygenates-to-olefins system, comprising the steps of: contacting an oxygenate feed in a reactor with a catalytically effective amount of molecular sieve-containing catalyst under conditions effective for converting said oxygenate to a product containing light olefins and forming a coked catalyst; contacting a portion of the coked catalyst in a regenerator, having a catalyst bed height (Hc), an inlet height (Hi), and an outlet height (Ho), with an oxygen-containing regeneration medium under conditions effective to at least partially regenerate the coked catalyst; and conducting a portion of the catalyst from the regenerator to a catalyst cooler to form a cooled catalyst portion, wherein Ho is greater than Hi.

Abstract: This invention is to a process for separating condensed water and entrained solids from an olefin stream so that fouling of the separation equipment by the entrained solids is reduced or eliminated. The process involves injecting an antifouling agent into a water condensing or quench system in an amount to maintain a zeta potential of fouling liquid and a zeta potential of the surface of the quench system both in a positive range or both in a negative range.

Abstract: This invention is directed to methods for forming an olefin stream from a methanol stream. A lower grade methanol, such as chemical grade or crude methanol, can be used as feed to form the olefin stream. The process uses a relatively simple distillation type step to vaporize a portion of the methanol feed stream and send the resulting vapor stream to a reaction unit to form the olefin stream. In addition, the invention provides the ability to operate the downstream recovery units with reduced fouling or plugging due to the presence of fine solids components.

Abstract: The present invention provides a process for increasing ethylene and/or propylene yield during conversion of oxygenates using a system comprising a reactor and a regenerator, wherein the reactor comprises a fluidized bed reactor and a riser reactor, which process increases ethylene and/or propylene yield by using a mixture of the deactivated catalyst from the fluidized bed reactor and the regenerated catalyst from the regenerator in the riser reactor for further cracking the C4+ hydrocarbon stream separated from the product stream.

Abstract: A method is described for processing an olefin-containing product stream (1) that contains, besides ethylene and propylene, longer-chain olefins and compounds of hydrocarbons with oxygen (oxygenates). Such a product stream (I) can occur in particular in olefin synthesis from methanol. The product stream is dewatered in successive process steps, optionally compressed in several steps and dried. Then it is subjected to fractionation. For removal of the undesired oxygenates it is proposed that the oxygenates be washed out of the gaseous product stream after the compression steps and before the drying step in a column (12) with methanol.

Abstract: The present invention is a phosphorous modified zeolite (A) made by a process comprising in that order: selecting a zeolite with low Si/Al ratio (advantageously lower than 30) among H+ or NH4+-form of MFI, MEL, FER, MOR, clinoptilolite, said zeolite having been made preferably without direct addition of organic template; steaming at a temperature ranging from 400 to 870° C. for 0.01-200 h; leaching with an aqueous acid solution containing the source of P at conditions effective to remove a substantial part of Al from the zeolite and to introduce at least 0.3 wt % of P; separation of the solid from the liquid; an optional washing step or an optional drying step or an optional drying step followed by a washing step; a calcination step.

Abstract: The present invention relates to processes for fluidizing a population of catalyst particles that are depleted of catalyst fines. In one embodiment, the process includes providing a plurality of catalyst particles in the reactor, wherein the catalyst particles have a d2 value of greater than about 40 microns. The catalyst- particles are contacted with a fluidizing medium under conditions effective to cause the catalyst particles to behave in a fluidized manner and form a fluidized bed. The particles are contacted with one or more primary obstructing members while in the fluidized bed. By fluidizing the catalyst particles in this manner, the catalyst particles can be maintained at an axial gas Peclet number of from about 10 to about 20.

Abstract: This invention provides a process for limiting the loss of catalyst particles through olefin product streams and regenerator flue gas streams exiting the reaction system. In particular, this invention provides for removing catalyst particles from the reactor using a water stream and from the regenerator using a two step separation process. The two step process involves the use of a catalyst fine separation unit.

Abstract: The present invention relates to a process to make light olefins, in a combined XTO?OCP process, from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock comprising: contacting said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the XTO reactor with a catalyst made of a P-modified zeolite (A) at conditions effective to convert at least a portion of the feedstock to form a XTO reactor effluent comprising light olefins and a heavy hydrocarbon fraction; separating said light olefins from said heavy hydrocarbon fraction; contacting said heavy hydrocarbon fraction in the OCP reactor with a catalyst made of a P-modified zeolite (A) at conditions effective to convert at least a portion of said heavy hydrocarbon fraction to light olefins; wherein said P-modified zeolite (A) is made by a process comprising in that order: selecting a zeolite (advantageously with Si/Al ratio between 4 and 500) among H+ or NH4+-form of MFI, MEL, FER, MOR, clinoptiloli

Abstract: The present invention provides a reactor system having: (1) a plurality of reactors connected in fluid flow communication and having at least one pair of reactors separated by an interstage position; (2) a line for supplying a reactant feed stream separately to an inlet of more than one of the plurality of reactors; and (3) a diverter in fluid communication with the interstage position and capable of directing a first portion of a product stream exiting one reactor in said pair of reactors to a first location and a second portion of the product flow stream to an inlet of another reactor in said pair of reactors.

Abstract: In a process for the preparation of C2- to C4-olefins, a feed stream comprising oxygenates and steam is passed through at least one fixed-bed zone comprising zeolite catalyst, where the oxygenates are converted catalytically into olefins with high selectivity for lower olefins, and the reaction mixture leaving the fixed-bed zone is separated into a first product stream comprising C2- to C3-olefins and inert gas components, at least one second product stream comprising C4+-olefins, and a third product stream consisting of aqueous phase. In order to improve the yield of lower olefins, the aim is to regulate the temperature of the catalytic reaction in accordance with a target temperature value in the range from 440 to 520° C. specified for the reaction mixture exiting the fixed-bed zone by means of a supplementary stream consisting of olefins and inert gas components fed into the feed stream.

Abstract: The invention concerns methods and systems for minimizing back-mixing of feedstock flow in converting oxygenates to olefins. In one embodiment, back-mixing is reduced by providing a reactor that includes baffles to reduce the hydraulic diameter of at least a portion of the reactor. Some or all of the baffles can also serve as cooling tubes for reducing temperature gradients in the reactor, and thereby maximize light olefin production.

Abstract: A process for manufacturing a silicoaluminophosphate molecular sieve comprising at least one intergrown phase of AEI and CHA framework types, the process comprising the steps of (a) combining at least one silicon source, at least one phosphorus source, at least one aluminum source, and at least one structure-directing-agent (R) to form a mixture; and (b) treating the mixture at crystallization conditions sufficient to form the silicoaluminophosphate molecular sieve, wherein the mixture prepared in step (a) has a molar composition of: (n)SiO2/Al2O3/(m)P2O5/(x)R/(y)H2O wherein n ranges from about 0.005 to about 0.6, m ranges from about 0.6 to about 1.2, x ranges from about 0.5 to about 0.99, and y ranges from about 10 to about 40.

Abstract: A catalyst for producing a light olefin including a pentasil-type zeolite, alkaline earth metal atoms and aluminum atoms contained in the pentasil-type zeolite satisfying the following atomic ratio: [alkaline earth metal atom/aluminum atom]=0.2 to 15, the average value of the gradient of an adsorption isotherm of the pentasil-type zeolite measured by the nitrogen adsorption method being 30 or more at a relative pressure of 0.2 to 0.7.

Abstract: The invention relates to a method for converting an oxygenated hydrocarbon feedstock into an olefin product comprising: (a) forming a CHA framework type aluminosilicate sieve catalyst made from a substantially fluoride-free synthesis mixture comprising silicon and aluminum sources, a slurry medium, and a template, wherein the sieve is substantially free from framework phosphorus and exhibits a Si/Al ratio from about 40-60; (b) optionally formulating the molecular sieve catalyst with an oxidized aluminum-containing precursor matrix material and a clay binder to form a molecular sieve catalyst composition; (c) activating the catalyst by removing/decomposing the template; and (d) contacting the activated catalyst with the feedstock under conditions sufficient to form an olefin product comprising ?about 65% by weight, on a water-free basis, of ethylene and propylene and having an ethylene-to-propylene ratio ?about 1.2. Ethylene- and propylene-containing polymers can be formed from the olefin product.

Abstract: A method for producing a mixture of ethylene and carbon monoxide by contacting ethane and an oxygen source with a catalyst comprising synthetic cryptomelane or octahedral molecular sieve. The method further comprises condensing the alkyl propionate with formaldehyde to produce an alkyl methacrylate.

Abstract: The present invention relates to a process to make light olefins from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock comprising: contacting said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in a primary reactor with a catalyst made of a metalloaluminophosphate (MeAPO) molecular sieve with lamellar crystal morphology at conditions effective to convert at least a portion of the feedstock to form a first reactor effluent comprising light olefins and a heavy hydrocarbon fraction; separating said light olefins from said heavy hydrocarbon fraction; contacting said heavy hydrocarbon fraction in a second reactor at conditions effective to convert at least a portion of said heavy hydrocarbon fraction to light olefins; wherein said MeAPO has an empirical chemical composition on an anhydrous basis, after synthesis and calcination, expressed by the formula HxMeyAlzPkO2 in which, y+z+k=1 x<=y y has a value ranging from 0.0008 to 0.