Naphtha splitter integration with hncc technology

a technology of naphtha and splitter, applied in the field of full-range naphtha processing, can solve the problems of high energy consumption for producing light olefins, low overall efficiency of naphtha catalytic cracking, and insufficient current market supply of these chemicals, so as to optimize energy consumption and light olefins and btx yield, reduce operating cost and capital expenditure, and reduce energy consumption

Pending Publication Date: 2021-07-22
SABIC GLOBAL TECH BV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a new method for producing light olefins and BTX using naphtha as a feedstock. The method involves separating the naphtha feed into a light naphtha stream and a heavy naphtha stream. The light naphtha is fed to a steam cracking unit and the heavy naphtha is fed to a heavy naphtha catalytic cracking unit. The effluent from both units is processed in the same separation unit. This integration reduces energy consumption by removing light naphtha from the steam cracking process and removing heavy naphtha from the catalytic cracking process. The method also improves energy efficiency and increases productivity by producing additional light olefins. The technical effects of the patent text are reduced energy consumption, improved energy efficiency, and increased production of light olefins and BTX.

Problems solved by technology

However, in this process, a large portion of effluent from steam cracking naphtha is hydrogenated and recycled back to the steam cracking unit, resulting in high energy consumption for producing light olefins.
As the demand for olefins and BTX has been consistently increasing for the last few decades, the current market supply for these chemicals may not be sufficient.
However, the overall efficiency for catalytic cracking of naphtha is relatively low because catalytic cracking of light portion of naphtha, which comprises primarily hydrocarbons having a boiling point of 30 to 90° C., generally requires severe reaction conditions (e.g., high temperatures) to achieve target yield of light olefins and BTX.
Thus, the energy consumption for producing light olefins and BTX via catalytic cracking is relatively high, resulting in high production costs for light olefins and BTX via catalytic cracking naphtha.
However, the lighter fraction of the hydrocarbon mixture fed to a heavy naphtha catalytic cracking unit consumes a large amount of energy due to higher reaction temperature, resulting in high production cost for light olefins and BTX.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Naphtha splitter integration with hncc technology
  • Naphtha splitter integration with hncc technology
  • Naphtha splitter integration with hncc technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028]Currently, both light olefins and BTX can be produced by catalytic cracking of naphtha, e.g., heavy naphtha. Light olefins and BTX can also be produced by steam cracking naphtha. However, the overall conversion rate to light olefins and BTX for steam cracking naphtha is relatively low, resulting in large amounts of recycle stream back to the steam cracking unit and, consequently, high production cost. However, cracking the light fraction of full range naphtha increases the energy consumption of the process, e.g., the heavy naphtha catalytic cracking unit. The availability of heavy naphtha is generally limited. Therefore, the overall production efficiency for heavy naphtha catalytic cracking is low. The present invention provides a solution to at least one of the problems associated with olefins and BTX production. The solution is premised on a method that includes splitting a full range naphtha into a light naphtha stream and a heavy naphtha stream. The lights stream and / or th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

Systems and methods for processing full range naphtha and producing light olefins and BTX are disclosed. Full range naphtha is separated in naphtha splitter to produce a light naphtha stream and a heavy naphtha stream. The heavy naphtha stream is then fed to a heavy naphtha catalytic cracker to produce a cracked stream. The effluent from the steam cracking unit and the effluent from the catalytic cracking unit may be flowed into an oil quench tower and are further separated in a separation unit to produce purified ethylene, propylene, butadiene, 1-butene, and BTX. The cracked stream maybe further processed. The light naphtha stream or both the lights stream combined with the light naphtha stream is fed to a steam cracker to produce an effluent stream comprising olefins. Effluent of the steam cracker is fed to the processing unit to separate light olefins. The C6+ hydrocarbons from the processes may be recycled.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority of U.S. Provisional Patent Application No. 62 / 684,089, filed Jun. 12, 2018, which is hereby incorporated by reference in its entirety.FIELD OF INVENTION[0002]The present invention generally relates to methods of processing full range naphtha. More specifically, the present invention relates to methods of processing full range naphtha by splitting it in a naphtha splitter to produce light naphtha (that includes liquefied petroleum gas) and heavy naphtha, which are then steam cracked and catalytically cracked, respectively. The present invention also generally relates to a process for producing light olefins and BTX (benzene, toluene, and xylene), and more specifically, it relates to a process that integrates heavy naphtha catalytic cracking and steam cracking to produce light olefins and BTX.BACKGROUND OF THE INVENTION[0003]Light olefins (C2 to C4 olefins) are building blocks for many chemica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): C10G51/06C10G9/36C10G11/05
CPCC10G51/06C10G9/36C10G11/05C10G2300/4012C10G2400/30C10G2300/301C10G2300/4006C10G2400/20C10G11/00C10G2400/22
InventorAL-SHAMMARI, TALALMAMILLA, SEKHAR BABU
OwnerSABIC GLOBAL TECH BV