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Hydrocarbon conversion methods

A technology for converting hydrogen sulfide into hydrogen sulfide, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbon cracking to hydrocarbon production, etc., and can solve problems that are difficult to achieve

Active Publication Date: 2015-11-25
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This removal can be difficult to achieve, especially for sulfur-containing molecules when they are present in relatively high concentrations

Method used

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  • Hydrocarbon conversion methods
  • Hydrocarbon conversion methods
  • Hydrocarbon conversion methods

Examples

Experimental program
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Effect test

Embodiment approach

[0104] The second step of the process of the present invention, referred to as the combustion or regeneration step begins with independently introducing the first and second reactants into the first reactor 7, the term "upstream" now being relative to the flow of the fourth mixture, as Figure 3b shown. The first and second reactants are introduced into the first reactor 7 via conduit (or conduits) 305 and optionally 3051 (not shown). The first reactant may be directed via a first passage within conduit 305, and the second reactant may be directed via a second passage within conduit 305 or independently via a passage within second conduit 3051 (not shown). Optionally, conduit 305 includes an upstream segment 305u and a downstream segment 305d, such as Figure 2B shown. The upstream section 305u (indicated by the solid line in this figure) is external to the first reactor 7 . Downstream segment 305d (shown in dashed lines) is in fluid communication with 305u and is located i...

Embodiment 1

[0115] The following prophetic examples were carried out. At a total pressure of 5.0 bar (absolute), the first mixture was exposed to 1.625×10 3 The time in °C is averaged (over the duration of the pyrolysis step) at the peak pyrolysis temperature of about 1.0×10 2 ms residence time, a second mixture was produced; the first mixture comprised 80.0 wt.% methane, 20.0 wt.% molecular hydrogen, and 10.0 ppmw of methyl mercaptan, based on the weight of the first mixture; and the second mixture comprised 21.1 wt .% acetylene, 13.8wt.% ethylene, 24.0wt.% methane, 1.6wt.% ethane, 29.4wt.% molecular hydrogen, 10.1wt.% C 3+ , < 0.1 ppmw methyl mercaptan, < 0.1 ppmw thiophene, and 8.5 ppmw hydrogen sulfide, based on the weight of the second mixture. Immediately following pyrolysis, the second mixture is exposed to a temperature < 100.0° C. which reduces reversible mercaptan formation, eg, from the reaction of ethylene and hydrogen sulfide in the second mixture.

Embodiment 2

[0118] A first mixture is provided comprising a naphtha feedstock, wherein the naphtha feedstock has an atmospheric boiling range of 0.0°C to 220°C, and (i) a hydrocarbon content of 99.8 wt.% and a total sulfur content (all reactive sulfur species - main mercaptans) at 0.2 wt.%, where the wt% is based on the weight of the naphtha feedstock. The naphtha feed was exposed to a temperature of 780° C. for a residence time of about 0.2 seconds at a pressure of 1.3 bar (absolute). Steam cracking of naphtha feedstock under these conditions yielded 30 wt.% C 2 Unsaturates, 0.15wt.% hydrogen sulfide, 35ppmw methyl mercaptans, 12ppmw total mercaptans, 50ppmw thiophene, and 60wt.% C 3+ the second mixture. Immediately following steam cracking, the second mixture is exposed to a temperature < 100.0°C which reduces reversible mercaptan formation, eg, from the reaction of ethylene and hydrogen sulfide in the second mixture.

[0119] Example 1 demonstrates that, under pyrolysis conditions, ...

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Abstract

The invention relates to processes for converting a mixture of hydrocarbon and sulfur-containing molecules such as mercaptan into products comprising acetylene, ethylene, and hydrogen sulfide, to processes utilizing the acetylene and ethylene resulting from the conversion, and to equipment useful for such processes.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application Serial No. 61 / 504,611, filed July 5, 2011; European Application No. 11180674.1, filed September 9, 2011; U.S. Provisional Application Serial No. 61, filed January 19, 2011 / 434,417; U.S. Provisional Application Serial No. 61 / 434,409, filed January 19, 2011; U.S. Provisional Application Serial No. 61 / 434,413, filed January 19, 2011; U.S. Provisional Application, filed January 19, 2011 Serial No. 61 / 434,410; U.S. Provisional Application Serial No. 61 / 434,411 filed January 19, 2011; U.S. Provisional Application Serial No. 61 / 434,415 filed January 19, 2011; filed January 19, 2011 U.S. Provisional Application Serial No. 61 / 434,419; U.S. Provisional Application Serial No. 61 / 500,999, filed May 3, 2011; and U.S. Provisional Application Serial No. 61 / 500,854, filed June 24, 2011 , the contents of each of which are hereby incorporated by reference in their entirety. technical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/76C07C4/04C10G9/00
CPCC07C2/78C07C2/06C07C4/06C07C5/09C07C7/00C07C7/14858C07C2521/04C07C2521/08C07C2521/12C07C2523/42C07C2523/44C07C2523/50C10G50/00C10G2300/1025C10G2300/202C10G2300/207C10G2400/20C10G2400/22C10G2400/24Y02P30/40C07C11/24C07C11/04C07C2/76C07C4/04C10G9/00
Inventor P·F·柯森科思恩F·赫什科维茨R·D·丹顿G·D·默尔
Owner EXXONMOBIL CHEM PAT INC
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