Supercharge Your Innovation With Domain-Expert AI Agents!

Method for producing propylene oligomer

A manufacturing method, a technology of propylene tetramer, applied in the direction of organic chemistry methods, chemical instruments and methods, hydrocarbons, etc., can solve the problems of short catalyst life, weak mechanical strength of solid phosphoric acid catalyst, etc., and achieve the effect of prolonging catalyst life

Pending Publication Date: 2022-05-27
IDEMITSU KOSAN CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical strength of the solid phosphoric acid catalyst is weak, so the life of the catalyst is short. In order to obtain propylene oligomers stably for a long time, the catalyst needs to be replaced frequently

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
  • Method for producing propylene oligomer
  • Method for producing propylene oligomer
  • Method for producing propylene oligomer

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0036] The first embodiment of the present application is a technique related to a method for producing a propylene oligomer, which includes a step of: in the presence of at least one selected from the group consisting of a crystalline molecular sieve-containing catalyst and a phosphoric acid-containing catalyst, under a An oligomerization step of oligomerizing propylene at a temperature of 160° C.; a fractional distillation step of obtaining a fraction containing propylene trimers, propylene tetramers, or mixtures thereof; and, in the presence of a catalyst containing phosphoric acid , an isomerization step of isomerizing propylene trimers, propylene tetramers, or their mixtures contained in the aforementioned fractions.

[0037] Hereinafter, the first embodiment will be described in detail.

[0038] [Production method of propylene oligomer]

[0039] The method for producing a propylene oligomer according to the first embodiment includes a step of subjecting propylene to a t...

no. 2 approach

[0146] A second embodiment of the present application is a technique related to a method for producing a propylene oligomer, comprising: in the presence of at least one selected from the group consisting of catalysts containing phosphoric acid, under the condition of less than the critical pressure of propylene A step of isomerizing an oligomer containing a propylene trimer, a propylene tetramer, or a mixture thereof.

[0147] By isomerizing oligomers mainly composed of propylene trimers, propylene tetramers, or their mixtures, the isomerization reaction can be carried out in small batches, and a low branching degree can be obtained with high selectivity. The oligomer of the target degree of polymerization. In addition, the oligomer containing propylene trimer, propylene tetramer, or a mixture thereof as a main component exists in the form of a liquid phase even under a reaction pressure lower than the critical pressure of propylene. Therefore, the production method of the pr...

no. 3 approach

[0200]The third embodiment of the present application is a propylene oligomer in which the concentration of 4,6,6-trimethyl-3-nonene in the propylene tetramer is 30 mass % or more. Further, a third embodiment of the present application is a technique related to a method for producing a propylene oligomer, wherein the method for producing the propylene oligomer comprises: subjecting propylene to a catalyst in the presence of a crystalline molecular sieve-containing catalyst. In the step of oligomerization, the BET specific surface area of ​​the crystalline molecular sieve obtained by the nitrogen adsorption method is set to a [m 2 / g], and the micropore specific surface area of ​​the aforementioned crystalline molecular sieve obtained by analyzing the adsorption isotherm measured by the nitrogen adsorption method by the t-plot method is set as b [m 2 / g], a / b is 1.8 or less.

[0201] In addition, the "micropore" in this invention means the pore whose diameter is 2 nm or less a...

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
Total surface areaaaaaaaaaaa
Login to View More

Abstract

Provided is a method for producing a propylene oligomer with which it is possible to obtain a low-branched propylene oligomer with high selectivity. A method for producing a propylene oligomer, the method comprising: an oligomerization step in which propylene is oligomerized under conditions of less than 160 DEG C in the presence of at least one selected from the group consisting of a catalyst comprising a crystalline molecular sieve and a catalyst comprising phosphoric acid; a fractionation step for obtaining a fraction containing a propylene tripolymer, a propylene tetrapolymer, or a mixture thereof; and an isomerization step for isomerizing the propylene trimer, the propylene tetramer or a mixture thereof contained in the fraction in the presence of a catalyst containing phosphoric acid.

Description

technical field [0001] The present invention relates to a method for producing a propylene oligomer. Background technique [0002] C9 and 12 propylene oligomers (propylene trimers and tetramers) obtained by oligomerizing propylene are useful as raw materials for alcohols, carboxylic acids, and the like, and as polyolefin-based monomers. [0003] Among them, propylene trimer is also widely used as a raw material of thiol and the like. Furthermore, the propylene tetramer is also used as a raw material for a cleaning agent, a plasticizer, and the like. As these raw materials, low-branched oligomers are particularly useful. [0004] Conventionally, oligomerization of propylene has been produced using a catalyst containing phosphoric acid such as a solid phosphoric acid catalyst, but recently, production of propylene oligomers using zeolite as a catalyst has been studied. The solid phosphoric acid catalyst has weak mechanical strength, and therefore has a short catalyst life, ...

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): C07C5/22C07C11/02B01J27/16B01J29/40C07B61/00
CPCB01J27/16C07B61/00B01J29/40C07C5/222C07C11/02Y02P20/52C07C2/12C07C2/18C07C2527/173C07C2529/40C07C5/2708C07C5/2716B01J37/10C07C5/22B01D3/14B01J35/615B01J35/617B01J35/633B01J35/635
Inventor 深泽峻社本润猿渡铁也长町俊希棚濑省二朗
Owner IDEMITSU KOSAN CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com