Isomerization

Hengye offers adsorbents for isomerization processes to remove water and sulfur from the process stream. The resulting purified isomerization stream can then enter the isomerization reactor to allow the conversion of normal paraffins to isoparaffins. Isomerization is the process of converting normal paraffins into isoparaffins, which offer a higher value than their normal counterparts. Normal paraffins have a linear structure, which can be rearranged to create branches, thus forming isomers that have the same number of carbons, but have a different geometric structure.

Butane Isomerization

Normal butane (n-butane) is converted into isobutane (i-butane), which will then be used in alkylation units. Before n-butane can be isomerized, first it is dehydrated and sulfur is removed to create a cleaner butane stream. Hydrogen is added to the purified stream to suppress dehydrogenation and the formation of coke. The stream is then processed in the isomerization reactor where normal paraffin chains are converted into isoparaffins chains. The butane mixture that is produced will then enter the fractionator, also known as a deisobutanizer, to separate normal butane from the desired isobutane stream.

Pentane and Hexane Isomerization

Normal pentane (n-C5) and normal hexane (n-C6) are converted into isopentane (i-C5) and isohexane (i-C6) for use in gasoline blending because the isomerization process increases the octane rating of these compounds. To process n-C5 and n-C6 into isomers, the feedstock is dehydrated and desulfurized, mixed with organic chloride and hydrogen, then heated. The addition of hydrogen to the stream will suppress dehydrogenation and coking. The stream is then introduced to catalysts that cause benzene and olefins to hydrogenate. Next, the stream enters the isomerization reactor where the conversion of normal paraffins to isoparaffins occurs in the presence of catalysts. After isomerization, the stream is cooled and separated into recycled hydrogen gas and a liquid product stream, known as isomerate. To finish processing the isomerate, caustic and water is used to wash the stream, acid is used to strip the stream, and then the stream is stabilized before being stored or used in the gasoline blending pool.

Isomerization

Products

HYG04DG molecular sieve is manufactured for the dehydration of hydrocarbon streams and can selectively remove water from both liquid phase and vapor phase streams. This dehydration process allows the hydrocarbon streams to be further processed in cryogenic separation and is more easily transported. This molecular sieve, with a high adsorption capacity, can bring benefits to a wide range of dehydration applications.  

  • used for the dehydration hydrocarbon streams 
  • capable of removing water to meet most specifications 
  • allows hydrocarbons to be further processed and transported 
  • offers an advantageous adsorption capacity

HYD05C molecular sieve is manufactured for use in air prepurification units to remove water, carbon dioxide, and other contaminants from feed gas. The removal of these contaminants is essential for compressed air systems and for creating high purity gas streams. This molecular sieve offers a high adsorption capacity for impurities, especially water. 

  • used to purify air feed gas
  • capable of removing water, carbon dioxide, light hydrocarbons, and more
  • allows gas to be further separated or otherwise used in compressors
  • offers an advantageous adsorption capacity for water

HYD10A is manufactured to deeply dehydrate feed gas prior to cryogenic separation by removing water, carbon dioxide, and other contaminants from feed gas. The removal of these contaminants will allow the feed gas to be further separated into the desired product stream. This molecular sieve has an ideal selectivity for removing impurities that can freeze or block cryogenic separation processes.

  • used to deeply dehydrate feed gas
  • capable of removing water, carbon dioxide, hydrocarbons, and more 
  • allows gas to be further separated or otherwise used in compressors 
  • offers an advantageous adsorption capacity for a wide range of impurities

Isotherms

Email info@hengyeinc.com for more information.

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Hengye Inc.

11999 Katy Fwy, Suite 588 Houston, Texas 77079 USA