Back to results
US 11,034,629 B1Granted
Integrated perchloroethylene decomposition reactor design for C4 and C5-6 isomerization units
AssigneeUop LLC
InventorsManoj Kumar, David J. Shecterle
Life of this patent
Estimating the term…
Abstract
Processes incorporating a common organic chloride decomposition reactor and chloride treater to be used by both the C4 and C5-6 isomerization reaction zones are described. A portion of the C4 isomerization reaction zone off gas is routed to the C4 HCl absorber, which provides about 85% of the HCl requirement for the C4 isomerization reaction zone. A small amount of the C5-6 isomerization reaction zone off gas is mixed with the C4 isomerization reaction zone off gas portion going to the C4 HCl absorber.
Claims20
An integrated process for C4 isomerization and C5-6 isomerization comprising:
- passing a C5-6 feed stream comprising normal pentane and normal hexane to a C5-6 HCl absorber forming a C5-6 absorber bottoms stream comprising normal pentane, normal hexane and HCI, and a C5-6 absorber overhead stream comprising a trace amount of HCl;
- passing a first hydrogen rich gas stream and a chloride feed stream containing an organic chloride compound to an organic chloride decomposition reactor containing a chloride decomposition catalyst to decompose the organic chloride compound to form a chloride effluent stream comprising hydrogen, hydrocarbon, and HCl;
- passing the C5-6 absorber bottoms stream and the chloride effluent stream to a C5-6 isomerization reaction zone under C5-6 isomerization conditions in the presence of a C5-6 isomerization catalyst to convert a portion of the normal pentane and normal hexane to iso-pentane and iso-hexane, forming a C5-6 isomerization effluent comprising normal pentane, normal hexane, iso-pentane, iso-hexane, and gases;
- separating the C5-6 isomerization effluent in a C5-6 stabilizer column into at least a C5-6 product stream comprising the normal pentane, normal hexane, iso-pentane, and iso-hexane, and a C5-6 off gas stream;
- passing a C4 feed stream comprising normal butane to a C4 HCl absorber forming a C4 absorber bottoms stream comprising normal butane and HCI, and a C4 absorber overhead stream comprising a trace amount of HCl;
- passing the C4 absorber bottoms stream and a second hydrogen rich gas stream to a C4 isomerization reaction zone under C4 isomerization conditions in the presence of a C4 isomerization catalyst to convert a portion of the normal butane to iso-butane forming a C4 isomerization effluent comprising normal butane, iso-butane, and gases;
- separating the C4 isomerization effluent in a C4 stabilizer column into at least a C4 product stream comprising the normal butane and iso-butane, and a C4 off gas stream;
- splitting the C5-6 off gas stream into three streams, and passing the first C5-6 off gas stream to the C5-6 HCl absorber, passing the second C5-6 off gas stream to the C4 HCl absorber, and passing the third C5-6 off gas stream to a chloride treater, wherein the first C5-6 off gas stream comprises about 75 to about 90% of the C5-6 off gas stream, the second C5-6 off gas stream comprises about 5 to about 15% of the C5-6 off gas stream, and the third C5-6 off gas stream comprises about 5 to about 20% of the C5-6 off gas stream;
- splitting the C4 off gas stream into two streams, and passing the first C4 off gas stream to the C4 HCl absorber, and passing the second C4 off gas stream to the C5-6 HCl absorber, wherein the first C4 off gas stream comprises about 75 to about 95% of the C4 off gas stream, and the second C4 off gas stream comprises about 5 to about 25% of the C4 off gas stream;
- and
- passing the C5-6 absorber overhead stream from the C5-6 HCl absorber and the C4 absorber overhead stream from the C4 HCl absorber to the chloride treaters.
8 more elements
An integrated process for C4 isomerization and C5-6 isomerization comprising:
- passing a C5-6 feed stream comprising normal pentane and normal hexane to a C5-6 HCl absorber forming a C5-6 absorber bottoms stream comprising normal pentane, normal hexane and HCl and a C5-6 absorber overhead stream comprising a trace amount of HCl;
- passing a first hydrogen rich gas stream and a chloride feed stream containing an organic chloride compound to an organic chloride decomposition reactor containing a chloride decomposition catalyst to decompose the organic chloride compound to form a chloride effluent stream comprising hydrogen, hydrocarbon, and HCl;
- passing the C5-6 absorber bottoms stream and the chloride effluent stream to a C5-6 isomerization reaction zone under C5-6 isomerization conditions in the presence of a C5-6 isomerization catalyst to convert a portion of the normal pentane and normal hexane to iso-pentane and iso-hexane, forming a C5-6 isomerization effluent comprising normal pentane, normal hexane, iso-pentane, iso-hexane, and gases;
- separating the C5-6 isomerization effluent in a C5-6 stabilizer column into at least a C5-6 product stream comprising the normal pentane, normal hexane, iso-pentane, and iso-hexane, and a C5-6 off gas stream;
- passing a C4 feed stream comprising normal butane to a C4 HCl absorber forming a C4 absorber bottoms stream comprising normal butane and HCl and a C4 absorber overhead stream comprising a trace amount of HCl;
- passing the C4 absorber bottoms stream and a second hydrogen rich gas stream to a C4 isomerization reaction zone under C4 isomerization conditions in the presence of a C4 isomerization catalyst to convert a portion of the normal butane to iso-butane forming a C4 isomerization effluent comprising normal butane, iso-butane, and gases;
- separating the C4 isomerization effluent in a C4 stabilizer column into at least a C4 product stream comprising normal butane and iso-butane, and a C4 off gas stream;
- splitting the C5-6 off gas stream into three streams, and passing the first C5-6 off gas stream to the C5-6 HCl absorber, passing the second C5-6 off gas stream to the C4 HCl absorber, and passing the third C5-6 off gas stream to a chloride treater, wherein the first C5-6 off gas stream comprises 75 to 90% of the C5-6 off gas stream, the second C5-6 off gas stream comprises 5 to 15% of the C5-6 off gas stream, and the third C5-6 off gas stream comprises 5 to 20% of the C5-6 off gas stream;
- splitting the C4 off gas stream into two streams, and passing the first C4 off gas stream to the C4 HCl absorber, and passing the second C4 off gas stream to the C5-6 HCl absorber, wherein the first C4 off gas stream comprises 75 to 95% of the C4 off gas stream, and the second C4 off gas stream comprises 5 to 25% of the C4 off gas stream;
- passing the C5-6 absorber overhead stream from the C5-6 HCl absorber and the C4 absorber overhead stream from the C4 HCl absorber to the chloride treaters;
- passing the C5-6 product stream to a deisohexanizer column;
- and
- passing the C4 product stream to a deisobutanizer column.
10 more elements
Dependencies are inferred from the claim text.