Process for producing aromatics from wide-boiling temperature hydrocarbon feedstocks

Patent metadata

Field	Value
Publication number	US-9657238-B2
Application number	US-201514872971-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 3, 2014
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

The present invention relates to methods and systems useful for producing aromatics-rich products from liquid hydrocarbon condensates. The production system includes a hydroprocessing reactor, an aromatization reactor system and a hydrogen extraction unit. The methods for producing the aromatics-rich products include introducing a wide boiling range condensate into the hydroprocessing reactor and operating the aromatics production system such that the hydroprocessing reactor forms a naphtha boiling temperature range liquid product. The liquid hydrocarbons produced in accordance with the present invention may optionally be further processed using a hydrogen extraction unit to produce a high-purity hydrogen fraction.

First claim

What is claimed is:

1. A method for producing hydrocarbon products from a wide boiling range condensate, the method comprising the steps of:
introducing the wide boiling range condensate and hydrogen into a hydroprocessing reactor of an aromatics production system, where a volume ratio of the hydrogen to the wide boiling range condensate introduced is in a range of from about 0.01 to about 10;
operating the aromatics production system under conditions such that the hydroprocessing reactor forms both a light product gas mixture and a naphtha boiling temperature range liquid product, where the naphtha boiling temperature range liquid product consists of naphtha boiling temperature range liquid product components having boiling point temperatures in a range of about 30° C. to about 240° C.;
passing the naphtha boiling temperature range liquid product to an aromatization reactor system and the light product gas mixture passes to a hydrogen extraction unit;
operating the aromatization reactor system under conditions appropriate for forming one or more hydrocarbon products;
passing hydrogen to the hydrogen extraction unit and at least a portion of the non-aromatic liquid product to the aromatization reactor system;
producing hydrogen and a mixed hydrogen-poor gas in the hydrogen extraction unit, wherein the mixed hydrogen-poor gas comprises no less than 70% by weight C 1 to C 5 alkanes; and
passing the hydrogen to the hydroprocessing reactor.

2. The method of claim 1 , wherein the hydrocarbon products are selected from the group consisting of aromatic hydrocarbons, petrochemicals, gasolines, kerosene, diesel fuels, liquefied petroleum products, fuel enhancing hydrocarbons, fuel stabilizing hydrocarbons and olefins.

3. The method of claim 1 , wherein the hydrogen comprises high-purity hydrogen.

4. The method of claim 1 , wherein the aromatization reactor system produces one or more hydrocarbon products selected from an aromatics-rich system product, a hydrogen-rich gas product, a non-aromatic liquid product.

5. The method of claim 4 , wherein the non-aromatic liquid product comprises C 9+ paraffins, naphthenes and monocyclic aromatic compounds.

6. The method of claim 1 , wherein the hydroprocessing reactor further comprises a hydroprocessing catalyst.

7. The method of claim 6 , wherein the hydroprocessing catalyst is maintained in a hydrogen atmosphere.

8. The method of claim 6 , wherein the hydroprocessing catalyst is operable to reduce the concentration of non-hydrocarbon compounds selected from sulfur, nitrogen, transition metals, alkali metals and alkaline earth metals.

9. The method of claim 1 , wherein the hydrogen extraction unit further comprises a solvent extraction system.

10. The method of claim 1 , wherein a portion of the wide boiling range condensate has a true boiling point (TBP) temperature greater than about 230° C.

11. The method of claim 1 , the wide boiling range condensate is converted into the naphtha boiling temperature range liquid product at an initial conversion rate in a range of from about 15% to about 75%.

12. The method of claim 1 , wherein the wide boiling range condensate has a final boiling point (FBP) temperature in a range of from about 400° C. to about 600° C.

13. The method of claim 1 , wherein the wide boiling range condensate comprises aromatics in a range of about 0.1% by weight to about 40% by weight of the wide boiling range condensate.

14. The method of claim 2 , wherein the aromatic hydrocarbons comprise mixed xylenes in a range of from about 8% by weight to about 30% by weight.

Assignees

• Saudi Arabian Oil Co

Inventors

• Abudawoud Raed
• Al-Amer Mohammed

Classifications

• C10G2400/30

  Aromatics · CPC title

• C10G69/10

  hydrocracking of higher boiling fractions into naphtha and reforming the naphtha obtained · CPC title

• C10G63/02 Primary

  plural serial stages only · CPC title

• C10G59/02 Primary

  plural serial stages only · CPC title

• C10G69/02 Primary

  plural serial stages only · CPC title