Method for treating coal tar using reactive distillation

a technology of reactive distillation and coal tar, which is applied in the direction of hydrocarbon oil treatment hydrocarbon oil treatment, etc., can solve the problem of increasing the cost of petrol

Inactive Publication Date: 2015-05-21
UOP LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for treating coal tar using a process called reactive distillation. This involves using a reaction zone with a hydrotreating catalyst and an absorbent to remove certain compounds from the coal tar. The treated coal tar is then separated into different fractions. The technical effect of this method is that it allows for the efficient removal of sulfur, nitrogen, oxygenates, and metals from coal tar, resulting in a purified product.

Problems solved by technology

However, petroleum is becoming more expensive because of increased demand in recent decades.

Method used

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  • Method for treating coal tar using reactive distillation
  • Method for treating coal tar using reactive distillation
  • Method for treating coal tar using reactive distillation

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Embodiment Construction

[0012]Coal can be pyrolized by heating at high temperature, e.g., up to about 2,000° C. (3600° F.), in the absence of oxygen to drive off the volatile components. Pyrolysis produces coke and coal tar. The coke can be used in other processes, such as the manufacture of steel. The coal tar stream comprises the volatile components from the coking process.

[0013]FIG. 1 shows one embodiment of a pre-treatment process 5 for the reactive distillation process of the present invention. The coal tar stream 10 is introduced into an optional separation zone 15. Separation zone 15 is designed to recover valuable products that would not survive hydrotreating and / or hydrocracking in the reactive distillation zone (described below). In particular, valuable oxygenated products, such as phenol, cresols or xylenols, would be converted to products such as CO2 and a hydrocarbon skeleton in the reactive distillation zone. These products 20 can be recovered from the coal tar stream 10 before it is sent to ...

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Abstract

Methods of treating coal tar using reactive distillation are described. The methods include introducing a coal tar stream into a reactive distillation zone which has a reaction zone and a separation zone. The reaction zone contains a hydrotreating catalyst and an absorbent. The coal tar stream is contacted with a hydrogen stream in the reaction zone to remove contaminants from the coal tar stream, and the treated coal tar stream is separated into at least two fractions.

Description

[0001]This application claims the benefit of Provisional Application Ser. No. 61 / 905,912 filed Nov. 19, 2013, entitled Method for Treating Coal Tar Using Reactive Distillation.BACKGROUND OF THE INVENTION[0002]Many different types of chemicals are produced from the processing of petroleum. However, petroleum is becoming more expensive because of increased demand in recent decades.[0003]Therefore, attempts have been made to provide alternative sources for the starting materials for manufacturing chemicals. Attention is now being focused on producing liquid hydrocarbons from solid carbonaceous materials, such as coal, which is available in large quantities in countries such as the United States and China.[0004]Pyrolysis of coal produces coke and coal tar. The coke-making or “coking” process consists of heating the material in closed vessels in the absence of oxygen to very high temperatures. Coke is a porous but hard residue that is mostly carbon and inorganic ash, which is used in mak...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C10G65/04C10G65/12C10G45/10
CPCC10G65/04C10G65/12C10G45/10C10G45/02C10G65/00C10G67/04C10G2300/4087C10G2400/02
InventorMAHER, GREGORY F.BEDARD, ROBERT L.CHEN, JOHN Q.COUGHLIN, PETER K.FREY, STANLEY J.GORAWARA, JAYANT K.JAN, DENG-YANGJOHNSON, JAMES A.RENDE, DEAN E.THAKKAR, VASANT P.
OwnerUOP LLC