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Processes and systems for converting hydrocarbons to cyclopentadiene

A technology for the conversion of cyclopentadiene and hydrocarbons, which is applied in the field of reactors and can solve problems such as coking and loss of catalyst activity

Active Publication Date: 2018-07-31
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further challenges include loss of catalyst activity due to coking during the process, and the need for further treatment to remove coke from the catalyst, and the inability to use oxygen-containing gases to provide heat input directly to the reactor without damaging the catalyst

Method used

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  • Processes and systems for converting hydrocarbons to cyclopentadiene
  • Processes and systems for converting hydrocarbons to cyclopentadiene
  • Processes and systems for converting hydrocarbons to cyclopentadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-Z

[0321] Synthesis of embodiment 1-ZSM-5 catalyst composition

[0322] Consists of 10,000g deionized (DI) water, 600g 50% NaOH solution, 25g 45% sodium aluminate solution, 730g n-propylamine 100% solution, 80g ZSM-5 seed crystal and 3,190g Ultrasil PM TM The synthetic mixture prepared with modified silica at approximately 20.3% solids was mixed in a 5 gallon vessel and then added to a 5 gallon autoclave after mixing. The synthesis mixture has the following molar composition:

[0323]

[0324] The synthesis mixture was mixed and reacted at 230°F (110°C) for 72 hours at 250 rpm. The resulting product was filtered and washed with deionized water, then dried in an oven at about 250°F (121°C) overnight. The XRD pattern (not shown) of the as-synthesized material showed pure phases typical of the ZSM-5 topology and that the material consisted of a mixture of large crystals of about 2 microns in size. A portion of the as-synthesized crystals were converted (for characterization)...

Embodiment 2

[0326] Embodiment 2-catalyst composition performance evaluation

[0327] The catalyst composition of Example 1 (0.5 g) was physically mixed with quartz (1.5 g, 60-80 mesh) and charged into the reactor. The catalyst composition was dried under He (100 mL / min, 30 psig (207 kPa), 250 °C) for 1 h, then 2 (200 mL / min, 30 psig (207 kPa), 500° C.) for 1 hour. Then use n-pentane, H 2 And the feed of the balance He, typically at 550-600 ° C, 5.0 psia (35 kPa-a) C 5 h 12 , 1.0 mol H 2 :C 5 h 12 , 14.7h -1 WHSV and total 30 psig (207 kPa) test catalyst composition. At 550-600°C by using H 2 After an initial test of 5 hours of treatment (200 mL / min, 30 psig (207 kPa), 650°C), the catalyst composition was tested for stability and regeneration performance, and then retested for performance at 600°C.

[0328] Cyclopentadiene and three equivalents of hydrogen are produced by dehydrogenation and cyclization of n-pentane (Equation 1). This is accomplished by passing n-pentane throu...

Embodiment 3

[0336] Example 3 - Reactor Performance Modeling

[0337] The above data set and similar experimental data were used to guide in Invensys Systems Inc. PRO / II 9.1.4 (for Examples 3A-3H) and Invensys Systems Inc. PRO / II 9.3.4 (for Examples 3I-3N ) to build models to estimate performance under various commercially relevant operating conditions and different reactor configurations. Depending on the specifics of the modeling, variations in the results can occur, but the models still show the relative benefits of the invention. Many modifications and changes are possible, and it is understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein. .

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Abstract

This invention relates to a process for converting acyclic C5 hydrocarbons to cyclopentadiene including: providing to the at least one adiabatic reaction zone a feedstock comprising acyclic C5 hydrocarbons at a temperature, Ti, wherein the at least one adiabatic reaction zone comprises a first particulate material comprising catalyst material; contacting the feedstock and the first particulate material in the at least one adiabatic reaction zone under reaction conditions to convert at least a portion of the acyclic C5 hydrocarbons to a first effluent comprising cyclopentadiene intermediates, unconverted acyclic C5 hydrocarbons, and, optionally, cyclopentadiene; heating the first effluent to a temperature, T2; providing the first effluent to the at least one diabatic reaction zone; and contacting the first effluent and a second particulate material comprising catalyst material in the at least one diabatic reaction zone under reaction conditions to convert at least a portion of the cyclopentadiene intermediates and the unconverted acyclic C5 hydrocarbons to a second effluent comprising cyclopentadiene.

Description

[0001] Inventor: Larry L. Iaccino [0002] Cross References to Related Applications [0003] This application claims priority and benefit from USSN 62 / 250,697, filed November 4, 2015, and EP Application 16153727.9, filed February 2, 2016. field of invention [0004] The present invention relates to the acyclic C 5 The feed is converted to contain the cyclic C 5 Process reactor for the product of the compound. Background of the invention [0005] Cyclopentadiene (CPD) and its dimer dicyclopentadiene (DCPD) are ideal raw materials widely used in a wide range of products in the chemical industry, such as polymer materials, polyester resins, synthetic rubber, solvents, Fuels, fuel additives, etc. Cyclopentadiene is currently a by-product of steam cracking of liquid feeds (eg, naphtha and heavier feeds). As existing and new steam crackers switch to lighter feedstocks, less CPD is being produced amid rising CPD demand. High costs due to supply constraints affect the potentia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/333C07C13/15B01J8/06B01J8/18B01J29/44B01J38/04C07C2/50
CPCC07C5/333C07C5/373C07C2529/44C07C2603/10B01J38/02B01J38/10B01J21/08B01J23/42B01J29/44B01J29/62B01J29/90Y02P20/584B01J2229/186Y02P20/50C07C13/15
Inventor L·L·亚奇诺
Owner EXXONMOBIL CHEM PAT INC
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