Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process to prepare normal paraffins

a paraffin and normal technology, applied in the field of normal paraffin preparation, can solve the problem of high relative cost of such a vacuum distillation, and achieve the effect of less energy and cost-effectiveness

Inactive Publication Date: 2019-09-12
SHELL OIL CO
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method to produce normal paraffins using a light wax stream, which results in smaller equipment size and easier separation. This method also requires less energy for heating and distillation. Additionally, the composition of the normal paraffins can be adjusted to make them lighter by eliminating heavier molecules from the heavy wax.

Problems solved by technology

However, the relative costs of such a vacuum distillation becomes rather high when the plant size is reduced for smaller and simpler process line-ups to prepare normal paraffins.

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
  • Process to prepare normal paraffins

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0054]Product Distribution of the First, Second and Third Liquid Hydrocarbon Streams

[0055]In Table 1 the flows of molecules with indicated chain length in three liquid hydrocarbon streams is given, with full distribution of the streams depicted in FIG. 2. The first liquid stream is obtained at a pressure of 55 bar and a temperature of 215° C., the second liquid stream at a pressure of 55 bar and a temperature of 159° and the third liquid stream at a pressure of 53 bar and a temperature of 15° C. It can be seen that the majority of the normal paraffins is present in the combined stream of 2nd and 3rd liquid.

[0056]The respective starting and end point of the carbon distributions (defined as the chain length equivalent to at least 0.5 wt % of the total amount of hydrocarbon) were 16-88, 5-29 and 3-20 respectively. It can be seen from FIG. 1 that the distributions for the 2nd and 3rd liquid are reasonably sharp, whereas the 1st liquid has significant tailing to higher carbon numbers, wi...

examples 2 to 6

[0057]Process to Prepare Normal Paraffins

[0058]In the comparative examples 2-4 all the liquid hydrocarbon streams are combined and used for the production of normal paraffins. Separation of the normal paraffins from the full product mixture is done using both atmospheric and vacuum distillations at conditions indicated. In example 5 and 6 as per the invention, only the light wax streams, so the 2nd and 3rd liquid hydrocarbon stream were selected. From the results in Table 2 it becomes apparent that in the comparative example atmospheric distillation results in very low recovery of the heavier part of the normal paraffin. For instance the C17 paraffin stream was only 3 tons per day at distillation temperatures of 345 and 370° C. respectively. For these heavier paraffins vacuum distillation is required as can be seen in example 4. Vacuum distillation however requires, which is undesired related to the high cost.

[0059]The cases according to the invention represented by example 5 and 6 ...

example 7

[0061]Process to Prepare C10-13 and C14 to 18 Normal Paraffins

[0062]The recovered paraffins will need further distillation after hydrogenation to meet the product specification of the lighter C10-C13 normal paraffins and C14-C18 normal paraffins final products. The resulting compositions are given in Table 3 and Table 4. It can be seen that the compositions according to the invention are lighter compared to the comparative example.

TABLE 3Composition of LDF for comparative example4 and example 6 as per inventionEx.C9C10C11C12C13C14Mw40.21032.031.925.50.5166.460.21032.231.625.50.5166.3

TABLE 4Composition of HDF for comparative example4 and example 6 as per inventionEx.C13C14C15C16C17C18Mw40.523.824.323.422.65.5220.460.526.725.722.419.35.5218.9

[0063]In Table 5 the normal paraffin final product weight fractions are given. It can be seen that in example 6 according to the invention almost the same amount of LDF is obtained, with a lower amount of HDF. The LDF content out of the NP product...

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

No PUM Login to View More

Abstract

A process for preparing normal paraffin involves separating a Fischer-Tropsch product stream to obtain first gaseous and liquid hydrocarbon streams. The first gaseous hydrocarbon stream is cooled and separated to obtain a second liquid hydrocarbon stream and a third liquid hydrocarbon stream, which are separated by atmospheric distillation, to obtain a normal paraffin fraction comprising 5 to 9 carbon atoms and a normal paraffin fraction comprising 10 to 35 carbon atoms. The normal paraffin fraction comprising 10 to 35 carbon atoms is separated by atmospheric distillation to obtain a normal paraffin fraction comprising 10 to 18 carbon atoms and a normal paraffin fraction comprising 19 to 35 carbon atoms. The fraction comprising 10 to 18 carbon atoms hydrogenated(a) and separated to obtain a normal paraffin comprising 10 to 13 carbon atoms and a normal paraffin comprising 14 to 18 carbon atoms.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a process to prepare normal paraffins.BACKGROUND TO THE INVENTION[0002]Normal paraffins may be obtained by various processes. EP2655565 disclose a method for deriving paraffins from crude oil. Also, paraffins may be obtained using the so called Fischer-Tropsch process. An example of such process is disclosed in WO2014095814 and WO2016107864.[0003]WO2016107864 discloses a process to prepare paraffins and waxes. In WO2016107864 the whole Fischer-Tropsch product stream comprising paraffins having from 10 to 300 carbon atoms is used to prepare a normal paraffin fraction comprising 10 to 17 carbon atoms. In this way a vacuum feed splitter is necessary to select the molecules to enter the hydrogenation unit. However, the relative costs of such a vacuum distillation becomes rather high when the plant size is reduced for smaller and simpler process line-ups to prepare normal paraffins.[0004]It is an object of the invention to solv...

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
IPC IPC(8): C10G73/44C10G73/36C10G2/00C10G7/00
CPCC10G2300/1081C10G73/44C10G2400/00C10G2300/4006C10G2300/1022C10G7/00C10G2300/4012C10G2/40C10G73/36C10L2290/42C10G45/02C10G45/32C10G49/22C10G2/00C08L91/06C10L2200/0492
Inventor BEZEMER, GERRIT LEENDERTRENKEMA, DUURT
Owner SHELL OIL CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com