11results about "Organic dehydrogenation" patented technology

We provide a technology to improve the heat resistance of dehydrogenation catalysts. The dehydrogenation catalyst is a compound represented by the general formula (A 1-x A' x )(Zr 1-y-z B y B' z )O 3-δ (wherein A is at least one element selected from alkaline earth metals, A' is at least one element of La and Y, B is at least one element of Ti and Ce, and B' is at least one element selected from Y, Sc, Yb, Al, In, and Nd, satisfying 0≦x≦0.4, 0.3≦(1-z)≦1, 0≦y, 0<(1-yz), and δ represents the amount of oxygen vacancy), and a subphase composed of at least one of three composite oxides represented by the general formulas AB'2O4, A2B'2O5, and A3B'4O9.

This invention utilizes mechanical vapor compression and / or thermal vapor compression, integrating compression loops across multiple process stages. A sequential network of compressors is used to increase the pressure and condensation temperature of vapor within each process stage as an internal vapor flow, and as an inter-vapor flow branching between process stages. Because available vapor is shared between compressor stages, the number of compressors can be reduced, improving economics. By separating vapor between compressor stages to balance the vapor mass flow rate across multiple process stages in the incremental compressor stages, the entire vapor compression system can be customized to individual process energy requirements and adapt to dynamic fluctuations in process conditions.

A dehydrogenation reaction catalyst, including a primary phase formed of a perovskite-type oxide represented by a general formula (A1-xA′x)(Zr1-y-zByB′z)O3-δ (in which A represents at least one element selected from alkaline earth metals; A′ represents at least one element of lanthanum (La) and yttrium (Y); B represents at least one element of titanium (Ti) and cerium (Ce); B′ represents at least one element selected from among yttrium (Y), scandium (Sc), ytterbium (Yb), aluminum (Al), indium (In), and neodymium (Nd); relationships: 0≤x≤0.4, 0.3≤(1−z)≤1, 0≤y, and 0<(1−y−z) are satisfied; and δ represents an oxygen deficiency), and a secondary phase formed of at least one member of three complex oxides represented by general formulas AB′2O4, A2B′2O5, and A3B′4O9, respectively (in which A and B′ are the same elements as A and B′ forming the perovskite-type oxide).

A reactor system and method for catalytic dehydrogenation of saturated C3-C6 hydrocarbons in a reactor disposed within a reactor separator, the reactor being open at the bottom and open to the separator, and the outlet riser from the reactor not being hard-coupled to at least one downstream cyclone. With this configuration, the amount of catalyst in the reactor can be controlled by changing the catalyst level in the reactor separator outside the reactor, and the total catalyst hold-up and / or weight hourly space velocity (WHSV) can be controlled independently of the catalyst flow from the catalyst regeneration device.

To provide a technique for improving heat resistance in a catalyst for dehydrogenation reaction.SOLUTION: A main phase composed of perovskite-type oxides represented by the general formula (LA-xA ' x) (LA-y-zByB ' z) A1 - δ (where A is at least one element selected from alkaline earth metals, A ' is at least one element of Zr1 and Y, B is at least one element of Ti and Ce, B ' is at least one element selected from Y, Sc, Yb, Al, In, and Nd, 0 ≤ x ≤ 0.4, 0.3 ≤ (1-z) ≤ 1, 0 ≤ y, 0 <(1-y-z) are satisfied, and δ represents an oxygen deficiency amount), a main phase composed of perovskite-type oxides represented by the general formula AB ' 2O4, A2B ' 2O5, O3, and a sub-phase composed of at least one of three composite oxides represented by A3B ' 4O9.SELECTED DRAWING: Figure 2

Methods for preparing catalysts for oxidative dehydrogenation (ODH) of alkanes such as ethane are provided An exemplary method includes providing a first mixture including metal oxides; a reducing agent; and one or more of a bismuth compound, an antimony compound, and a tellurium compound; and heating the first mixture to form the catalyst. The first mixture is essentially free of water. The metal oxides include an oxide of molybdenum and an oxide of vanadium. The bismuth compound includes bismuth oxide, bismuth hydroxide, or a bismuth carbonate. The antimony compound includes an oxide of antimony, antimony acetate, or antimony ethoxide. The tellurium compound includes tellurium dioxide.

To provide a technique for improving heat resistance in a catalyst for dehydrogenation reaction.SOLUTION: A main phase composed of perovskite-type oxides represented by the general formula (LA-xA ' x) (LA-y-zByB ' z) A1 - δ (where A is at least one element selected from alkaline earth metals, A ' is at least one element of Zr1 and Y, B is at least one element of Ti and Ce, B ' is at least one element selected from Y, Sc, Yb, Al, In, and Nd, 0 ≤ x ≤ 0.4, 0.3 ≤ (1-z) ≤ 1, 0 ≤ y, 0 <(1-y-z) are satisfied, and δ represents an oxygen deficiency amount), a main phase composed of perovskite-type oxides represented by the general formula AB ' 2O4, A2B ' 2O5, O3, and a sub-phase composed of at least one of three composite oxides represented by A3B ' 4O9.SELECTED DRAWING: Figure 2

The present disclosure provides a method of operating a dehydrogenation reactor requiring vacuum pressure during the dehydrogenation reaction, the method including feeding a hydrocarbon to a reactor comprising a catalyst bed and configured to dehydrogenate the hydrocarbon under vacuum pressure; purging the reactor to remove remaining hydrocarbon; regenerating the catalyst bed with air from a regeneration air source; and evacuating the reactor to induce vacuum pressure, wherein the evacuating comprises passing a motive gas through a reactor evacuation ejector in fluid connection with the reactor, wherein the motive gas is nitrogen or air in the absence of steam. A system for dehydrogenation of a hydrocarbon is also provided, which includes a dehydrogenation reactor and a reactor evacuation ejector in fluid communication with the dehydrogenation reactor and a motive gas source, wherein the motive gas is nitrogen or air in the absence of steam.

This dehydrogenation reaction catalyst comprises: a main phase configured from a perovskite oxide expressed by general formula (A1−xA'x)(Zr1−y−zByB'z)O3−δ (where A is at least one element selected from alkali earth metals, A' is at least one element from among La and Y, B is at least one element from among Ti and Ce, B' is at least one element from among Y, Sc, Yb, Al, In, and Nd, 0 ≤ x ≤ 0.4, 0.3 ≤ (1 − z) ≤ 1, 0 ≤ y, 0 < (1 − y − z), and δ represents an oxygen deficit); and an auxiliary phase configured from at least one from among three composite oxides expressed by general formula AB'2O4, A2B'2O5, or A3B'4O9.

We provide a technology to improve the heat resistance of dehydrogenation catalysts. The dehydrogenation catalyst is a compound represented by the general formula (A 1-x A' x )(Zr 1-y-z B y B' z )O 3-δ (wherein A is at least one element selected from alkaline earth metals, A' is at least one element of La and Y, B is at least one element of Ti and Ce, and B' is at least one element selected from Y, Sc, Yb, Al, In, and Nd, satisfying 0≦x≦0.4, 0.3≦(1-z)≦1, 0≦y, 0<(1-yz), and δ represents the amount of oxygen vacancy), and a subphase composed of at least one of three composite oxides represented by the general formulas AB'2O4, A2B'2O5, and A3B'4O9.

The present disclosure provides a method of operating a dehydrogenation reactor requiring a vacuum pressure during a dehydrogenation reaction, the method comprising: feeding a hydrocarbon to the reactor, the reactor comprising a catalyst bed and configured to dehydrogenate the hydrocarbon at a vacuum pressure; purging the reactor to remove the remaining hydrocarbons; regenerating the catalyst bed with air from a regeneration air source; and evacuating the reactor to induce a vacuum pressure, where the evacuating includes passing a motive gas through a reactor evacuating ejector fluidly connected to the reactor, where the motive gas is nitrogen or air in the absence of steam. Also provided is a system for dehydrogenation of hydrocarbons, comprising a dehydrogenation reactor and a reactor evacuation ejector in fluid communication with the dehydrogenation reactor and a source of power gas, where the power gas is nitrogen or air in the absence of steam.