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Upgrading hydrocarbon pyrolysis products

A pyrolysis and product technology, applied in the treatment of hydrocarbon oil, separation of effluent, liquid carbon-containing fuel, etc., can solve the problem of reducing the pressure drop rate of the reactor

Active Publication Date: 2017-02-15
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, hydrotreating SCT in the presence of utility fluid produced fewer undesired by-products and reduced reactor pressure drop rate increases

Method used

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  • Upgrading hydrocarbon pyrolysis products
  • Upgrading hydrocarbon pyrolysis products
  • Upgrading hydrocarbon pyrolysis products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] A 45.7 cm length of 3 / 8 inch (0.9525 cm) SS pipe was used as the reactor. During the experiment, the middle 34 cm was maintained at a near-isothermal temperature of 400 °C. Add 18cm to the reactor 3 A commercially available nickel-molybdenum-on-alumina hydrotreating catalyst (RT-621).

[0206] The reactor was vulcanized as follows: A 20 wt% solution of dimethyl disulfide in isopar M was flowed through the packed reactor at 0.042 mL / min at 100°C for 1 hour, then at 240°C for 12 hours and finally in Flow at 340°C for 60 hours. The vulcanization procedure was carried out while flowing 20 standard cubic centimeters per minute (sccm) of H at a pressure of 1000 psig. 2 .

[0207] 100.0 wt% of the feedstock was provided to the reactor. The feedstock contained 60.0 wt% of SCT (with the properties of SCT-1 described in Table 1) directed to the process and 40.0 wt% of a primer fluid comprising > 98 wt% of trimethylbenzene, the weight Percentages are based on weight of feeds...

Embodiment 2

[0220] A 56 cm length of 3 / 8 inch (0.9525 cm) SS pipe was used as the reactor with a total volume of 20 cm 3 . During the experiment, the middle 34 cm was maintained at a near-isothermal temperature of 350 °C. The volume of the hot zone is 14cm 3 . Add 20cm to the whole reactor 3 A commercially available nickel molybdenum oxide on alumina hydrotreating catalyst (RT-621), and 5cm 3 80 mesh silica to fill the interstitial spaces.

[0221] The reactor was vulcanized as follows: A 20 wt% solution of dimethyl disulfide in isopar M was flowed through the packed reactor at 0.042 mL / min at 100°C for 1 hour, then at 240°C for 12 hours and finally in Flow at 340°C for 60 hours. The vulcanization procedure was carried out while flowing 20 standard cubic centimeters per minute (sccm) of H at a pressure of 1000 psig. 2 . After vulcanization is complete, the flow of dimethyl disulfide is stopped.

[0222] After sulfidation, the reactor temperature was raised to a temperature of 350...

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Abstract

The invention relates to a utility fluid, such as a fluid containing aromatic and non- aromatic ringed molecules, useful as a diluent when hydroprocessing pyrolysis tar, such as steam cracker tar. The specified utility fluid comprises >= 10.0 wt% aromatic and non- aromatic ring compounds and each of the following: (a) >= 1.0 wt% of 1.0 ring class compounds; (b) >= 5.0 wt% of 1.5 ring class compounds; (c) >= 5.0 wt% of 2.0 ring class compounds; and (d) <= 0.1 wt% of 5.0 ring class compounds. The invention also relates to methods for producing such a utility fluid and to processes for hydroprocessing pyrolysis tar.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to US Provisional Application Serial No. 61 / 986316, filed April 30, 2014, and EP14171697.7, filed June 10, 2014, which are hereby incorporated by reference in their entirety. [0003] field of invention [0004] The present invention relates to a utility fluid, such as a fluid containing aromatic and non-aromatic cyclized molecules, which can be used as a diluent when hydrotreating pyrolysis tars, such as steam cracker tars. The invention also relates to methods of producing such utility fluids and to methods of hydrotreating pyrolysis tars. [0005] Background of the invention [0006] Pyrolysis processes such as steam cracking are used to convert saturated hydrocarbons into higher value products such as light olefins such as ethylene and propylene. In addition to these useful products, hydrocarbon pyrolysis also produces large quantities of relatively low-value heavy produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/00C10G49/22C10G49/24C10G69/06C10L1/04
CPCC10G49/00C10G49/22C10G49/24C10G69/00C10G69/06C10G2300/4031C10G2300/4081C10L1/04
Inventor N·索尔塔尼迪斯J·S·布坎南C·M·艾万斯D·T·菲卢赫利L·R·M·玛藤斯K·G·里德F·C·王徐腾C·容
Owner EXXONMOBIL CHEM PAT INC
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