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Steam cracking of hydrocarbon feedstocks containing salt and/or particulate matter

A technology for particulate matter and hydrocarbon feedstock, applied in the field of steam cracking, which can solve the problems of undesalted hydrocarbon feedstock

Active Publication Date: 2007-05-02
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] While these references address the use of heavier hydrocarbon feedstocks, none of them address the possibility of using undesalted hydrocarbon feedstocks for pyrolysis furnaces

Method used

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  • Steam cracking of hydrocarbon feedstocks containing salt and/or particulate matter

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Embodiment Construction

[0016] All percentages, parts, ratios, etc. are by weight unless otherwise indicated. Unless otherwise stated, a reference to a compound or component includes the compound or component itself as well as combinations with other compounds or components, such as mixtures of compounds.

[0017] Additionally, when an amount, concentration, or other value or parameter is given as a series of upper and lower preferred values, this is to be understood as specifically disclosing all ranges formed by any pair of upper and lower preferred values, regardless of the stated Whether the scope is exposed individually.

[0018] As used herein, the non-volatile component is the fraction of a hydrocarbon stream having a nominal boiling point greater than 590°C (1100°F) as measured according to ASTM D-6352-98 or D-2887. The present invention works very well with non-volatile components having a nominal boiling point greater than 760°C (1400°F). The boiling point distribution of the hydrocarbon ...

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Abstract

A highly efficient vapor / liquid separation apparatus for treating a flow of vapor / liquid mixtures of hydrocarbons and steam comprises a substantially cylindrical vertical drum having an upper cap section, a middle section comprising a circular wall, a lower cap section, a tangential inlet to introduce hydrocarbon / steam mixtures, an overhead vapor outlet, and a bottom outlet for liquid. The vessel also comprises an annular structure located in the middle section, comprising i) an annular ceiling section extending from the circular wall and ii) a concentric internal vertical side wall to which the ceiling section extends. The annular structure blocks upward passage of vapor / liquid mixtures along the circular wall beyond the ceiling section, and surrounds an open core having sufficient cross-sectional area to permit vapor velocity low enough to avoid significant entrainment of liquid.

Description

field of invention [0001] This invention relates to steam cracking of hydrocarbon feedstocks containing salt and / or particulate matter. Background of the invention [0002] Steam cracking (also known as pyrolysis) has long been used to crack various hydrocarbon feedstocks into olefins, preferably light olefins such as ethylene, propylene and butenes. Conventional steam cracking uses a pyrolysis furnace with two main sections: a convection section and a radiant section. The hydrocarbon feed usually enters the convection section of the furnace as a liquid (except for the light low molecular weight feed which enters as a vapor), where the hydrocarbon feed usually passes through indirect contact with the hot flue gas from the radiant section and (to a lesser extent) with Steam is heated and vaporized by direct contact. The vaporized feedstock and steam mixture is then introduced into the radiant section where cracking occurs. Pyrolysis involves heating a feedstock sufficientl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/16C10G9/20C10G9/36C10G9/06C07C4/04B01D19/00C10G9/00
CPCC10G2300/1055C10G2300/1077C10G2300/104C10G2300/1051C10G2300/807C10G2300/1022C10G2300/1033C10G2300/1074C10G2400/20B01D19/0036C10G2300/1059C10G2300/107C10G2300/1044C10G9/20C10G9/00Y02P30/40
Inventor J·N·麦克伊A·R·迪尼克兰托尼奥J·M·弗莱伊M·D·斯塔普利托R·C·斯特
Owner EXXONMOBIL CHEM PAT INC
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