Chemical Development Team

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Part 9: Hydrotreating

Posted by Chemical Development Team on May 19, 2016 7:30:00 AM

 

 

Many of the process streams in a refinery contain unsaturated hydrocarbons, sulfur compounds, nitrogen compounds and other materials (metals) that interfere with some of the refining processes. Hydrotreating is a catalytic process that makes use of by-product hydrogen from the catalytic reforming process, to saturate hydrocarbons (change a carbon-to carbon double bond to a carbon-to carbon single bond) by adding a hydrogen atom to each of the two carbon atoms. In doing so, the process removes sulfur, nitrogen and metals from a wide variety of process streams. In general, each of the major streams coming off the atmospheric tower will have a hydrotreating unit.

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Topics: Hydrotreater

Part 8: Decontamination of the Crude Unit – The Vacuum Tower

Posted by Chemical Development Team on Apr 5, 2016 7:00:00 AM

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Upon leaving the desalter, the crude oil will go to a crude processing unit where the first actual separations will take place. The feed charge will pass through the preheat bundles, generally on the shellside, where it will pick-up heat from an already processed stream. These bundles are where one type of refinery coke is formed. The temperatures are not high enough to form true carbon, but the deposit will still be extremely hard to remove chemically.

 

In previous discussions we have discussed this problem and also identified that technology has advanced so that very effective chemical cleaning of these “coke” (really asphaltene) deposits can be successfully accomplished in-place while off-line. Quite frankly, better outcomes are possible if operations would chemically clean these exchangers more often and not wait until the exchangers are nearly plugged solid.

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Topics: Decontaminanation, Crude Unit, asphaltene

Part 7: Decontamination of the Crude Unit - Asphaltenes

Posted by Chemical Development Team on Feb 8, 2016 8:20:04 AM

 

 

As we have spoken about decontamination of the crude distillation unit we have discussed tank cleaning operations, how to address troublesome desalters and general degassing issues. Throughout these talks, there has been a common theme in the background. And, what is that? More often than not, the refiner is plagued with fouling from heavy organic deposits. Typically, these compounds are asphaltenes, waxes, and resins. Why is this so?

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Topics: Decontaminanation, asphaltene

Part 6: Removing Heavy Organic Deposits from the Crude Unit

Posted by Chemical Development Team on Jan 8, 2016 8:48:44 AM

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Topics: Crude Oil Tank Cleaning, asphaltene

Part 5: Decontamination of the Crude Unit

Posted by Chemical Development Team on Nov 10, 2015 1:32:49 PM

 

 

Part 5 in the series on how the chemical industry is solving challenges in the industrial sector.

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Topics: Degassing, Decontaminanation, Crude Unit

Part 4: Atmospheric Distillation

Posted by Chemical Development Team on Sep 30, 2015 3:00:00 PM

 

Distillation Towers

 

Part 4 in the series on how the chemical industry is solving challenges in the industrial sector.

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Topics: Degassing, Atmospheric Distillation

Part 3: Crude Unit Decontamination – The Preheat Train

Posted by Chemical Development Team on Sep 8, 2015 8:26:47 AM

 

Part 3 in the series on how the chemical industry is solving challenges in the industrial sector.

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Topics: Pre-heat Train, Crude Unit Decontamination

Part 2: Crude Unit Decontamination - The Desalter

Posted by Chemical Development Team on Jul 30, 2015 10:45:00 AM

 

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Part 2 in the series on how the chemical industry is solving challenges in the industrial sector.

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Topics: Desalter

“Degassing” truly degassing or something else?

Posted by Chemical Development Team on Jul 20, 2015 9:00:00 AM

 

degassing-blog1 
“Degassing,” a term frequently used in the petroleum processing and production industries, is the process of evacuating hazardous vapors from the interior of processing vessels and piping.

 

These hazardous vapors are typically volatilized hydrocarbon gases and hydrogen sulfide, among others. The process of degassing does not include the removal of residual organic or inorganic solids or scales—only vapors.

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Topics: Degassing, Decontaminanation

Part 1: What are the advantages and limitations of Chemical Cleaning?

Posted by Chemical Development Team on Jun 23, 2015 9:00:00 AM

 

chemical-cleaning-blog

 

Part 1 in the series on how the chemical industry is solving challenges in the industrial sector. Follow along as we explore how customized chemicals increase the efficiency, safety and financial performance of refinery operations.

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Topics: Chemical Cleaning

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This blog serves as a way to share insights into the world of chemistry, and talk about the latest industry news. Our posts are written by our chemical development team.

 

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