Method for recovering hydrocarbon compounds and a hydrocarbon recovery apparatus from a gaseous by-product

Patent metadata

Field	Value
Publication number	US-9513051-B2
Application number	US-201414251816-A
Country	US
Kind code	B2
Filing date	Apr 14, 2014
Priority date	Feb 27, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

There is provided a method for recovering hydrocarbon compounds from a gaseous by-products generated in the Fisher-Tropsch synthesis reaction, the method comprising a pressurizing step in which the gaseous by-products are pressurized, a cooling step in which the pressurized gaseous by-products are pressurized to liquefy hydrocarbon compounds in the gaseous by-products, and a separating step in which the hydrocarbon compounds liquefied in the cooling step are separated from the remaining gaseous by-products.

First claim

The invention claimed is:

1. A hydrocarbon recovery apparatus for recovering hydrocarbon compounds from first gaseous by-products discharged from an FT synthesis reactor for producing hydrocarbon compounds by the Fisher-Tropsch synthesis reaction, the apparatus comprising:
a heat exchanger provided at the upstream of a feedstock gas inlet port of the FT synthesis reactor;
a first gas-liquid separator configured to separate the first gaseous by-products discharged from the top of the FT synthesis reactor into a liquid component and second gaseous by-products;
a pressurizing device configured to pressurize the second gaseous by-products so that a pressure value P3 of the pressurized second gaseous by-products satisfies P1+0.5MPa≦P3≦P1+5.0 MPa with respect to a pressure value P1 of the first gaseous by-products;
a cooler configured to cool down the pressurized second gaseous by-products to liquefied hydrocarbon compounds from the cooled second gaseous by-products;
a second gas-liquid separator configured to separate a liquid component including the liquefied hydrocarbon compounds from the cooled second gaseous by-products by the cooler; and
a recycle line for introducing at least a portion of the remaining gaseous by-products which is separated the liquid component from the second gaseous by-products in the second gas-liquid separator into the feedstock gas inlet port of the FT synthesis reactor through the heat exchanger as a feedstock gas,
wherein, the first gaseous by-products discharged from the top of the FT synthesis reactor are passed through the heat exchanger and are introduced into the first gas-liquid separator, and
the recycle line is provided with a pressure adjustor for adjusting the pressure of the remaining gaseous by-products to the internal pressure of the feedstock inlet port.

Assignees

• Japan Oil Gas & Metals Jogmec
• Inpex Corp
• Jx Nippon Oil & Energy Corp
• Japan Petroleum Exploration Co Ltd
• Cosmo Oil Co Ltd
• Nippon Steel & Sumikin Eng Co

Inventors

• Tasaka Kazuhiko

Classifications

• F25J3/08 Primary

  Separating gaseous impurities from gases or gaseous mixtures {or from liquefied gases or liquefied gaseous mixtures}(cold traps B01D8/00) · CPC title

• C10G31/06

  by heating, cooling, or pressure treatment · CPC title

• C10G2/30 Primary

  from carbon monoxide with hydrogen · CPC title

• C10G2300/1022

  Fischer-Tropsch products · CPC title

• C10G2300/4081

  Recycling aspects · CPC title