Process for converting hydrocarbon feedstocks with electrolytic recovery of halogen

A technology for hydrocarbon raw materials and halogens, which is applied in the field of converting hydrocarbon raw materials while electrolytically recovering halogens, to achieve the effect of simple by-products

Inactive Publication Date: 2010-03-31
GRT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process requires the bromine produced in the electrolysis to be converted back to HBr, a conversion step that is a major disadvantage of the HBr electrolysis to hydrogen route

Method used

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  • Process for converting hydrocarbon feedstocks with electrolytic recovery of halogen
  • Process for converting hydrocarbon feedstocks with electrolytic recovery of halogen
  • Process for converting hydrocarbon feedstocks with electrolytic recovery of halogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Example 1 Methane bromination

[0102] Methane (11 sccm, 1.0 atm) was mixed with nitrogen (15 sccm, 1.0 atm) through a tee at room temperature and passed through a bromine-filled bubbler at 18°C. CH 4 / N 2 / Br 2 The mixture is passed to a preheated 500°C glass tube (inner diameter 2.29cm, length 30.48cm, filled with glass beads), where methane bromination reaction occurs with a residence time of 60 seconds, mainly producing methyl bromide, methylene bromide and HBr:

[0103] CH 4 +Br 2 →CH 3 Br+CH 2 Br 2 +HBr

[0104] As the products leave the reactor, they are collected by a series of traps containing 4M NaOH for neutralization of HBr and containing hexadecane to dissolve as much hydrocarbon product as possible (with octadecane as internal standard). Volatile components (such as methane) are collected in the gas bag after the HBr / hydrocarbon trap.

[0105] After the bromination reaction, the coke or carbonaceous deposits were burned in a hot air stream (5 scc...

Embodiment 2

[0106] Example 2 CH 3 Coupling of Br to light olefins

[0107] 2.27 g of 5% Mg doped ZSM-5 (CBV8014) zeolite was placed in a tubular quartz reactor (1.0 cm ID) which was preheated to 400°C prior to the reaction. will pass N 2 Diluted CH 3 Br is pumped to the reactor, CH is controlled by a micro liquid pump 3 Br flow rate 24μl / min, N 2 The flow rate is 93.3ml / min. CH 3 The Br coupling reaction was carried out on the catalyst bed with a residence time of 0.5 sec, CH 3 The partial pressure of Br was 0.1, which was set according to the flow rate.

[0108] After 1 hour of reaction, the product exited the reactor and was collected by an in-line trap containing 4M NaOH to neutralize the HBr and containing hexadecane to dissolve as much hydrocarbon product as possible (with octadecane as an internal standard ). Volatile components such as methane and light olefins are collected in the air bag after the HBr / hydrocarbon trap.

[0109] After the coupling reaction, the coke or c...

Embodiment 3

[0111] Example 3 CH 3 Br coupled to BTX

[0112] Mn ion-exchanged ZSM-5 zeolite (CBV3024, 6 cm in length) pellets were loaded into a tubular quartz reactor (ID, 1.0 cm), which was preheated to 425° C. before the reaction. N 2 Diluted CH 3 Br is pumped to the reactor, CH is controlled by a micro-pump 3 Br flow rate 18μl / min, N 2 Flow rate 7.8ml / min. CH 3 The Br coupling reaction was carried out on the catalyst bed with a residence time of 5.0 sec, CH 3 The Br partial pressure is 0.5, set according to the flow rate.

[0113] After 1 hour of reaction, the product exited the reactor and was collected through an in-line trap containing 4M NaOH for neutralization of HBr and containing hexadecane to dissolve as much hydrocarbon product as possible (octadecane was included as an internal standard). Volatile components such as methane and light olefins are collected in the air bag after the HBr / hydrocarbon trap.

[0114] After the coupling reaction, the coke or carbonaceous de...

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Abstract

An improved continuous process for converting methane, natural gas, and other hydrocarbon feedstocks into one or more higher hydrocarbons, methanol, amines, or other products comprises continuously cycling through hydrocarbon halogenation, product formation, product separation, and electrolytic regeneration of halogen, optionally using an improved electrolytic cell equipped with an oxygen depolarized cathode.

Description

technical field [0001] The present invention relates to methods for converting natural gas and other hydrocarbon feedstocks to higher value products such as fuel grade hydrocarbons, methanol and aromatics. Background technique [0002] U.S. Patent Application US 11 / 703,358, filed February 5, 2007 ("the '358 Application"), entitled "Continuous Production Process for the Conversion of Natural Gas to Liquid Hydrocarbons," which is based on U.S. Provisional Application US 60 / 765,115, describes a continuous process for reacting molecular halogens with hydrocarbon feedstocks to produce higher hydrocarbons. In one embodiment, the process includes the steps of halogenation of alkanes, "reproportionation" of polyhalogenated compounds to increase the amount of monohalides formed, oligomerization of alkyl halides (C-C coupling) to form higher carbon number products, separation of products from hydrogen halides, continuous regeneration of halogens, and recovery of molecular halogens fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/00
CPCC07C11/02C10B57/06C07C1/30C10G2300/1011C25B1/04H01L2924/014C10B53/04C25B1/24Y02E60/366C10G2400/30C10G29/02C10G2300/1025Y02P20/145Y02E60/36C07C1/26C07C29/124C07C209/08C07C17/06C07C31/04C07C11/04C07C11/06C07C211/03C07C19/075C10K3/00C25B3/27
Inventor 菲利普·罗索埃里克·W.·麦克法兰杰弗里·H.·谢尔曼
Owner GRT
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