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

Method for preparing isooctene from mixed C4

A technology for mixing C4 and isooctene, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of low 1-butene reaction conditions, mildness, etc.

Pending Publication Date: 2021-11-02
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Based on the above literature survey, in the prior art, there is no superimposed method that can guarantee low 1-butene conversion under the premise of high isobutene conversion rate, mild reaction conditions, and simple reaction process

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 preparing isooctene from mixed C4
  • Method for preparing isooctene from mixed C4
  • Method for preparing isooctene from mixed C4

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] According to the present invention, the preparation method of described Y type molecular sieve catalyst comprises:

[0036] (1) NaY molecular sieve and ammonium salt aqueous solution are subjected to ammonium ion exchange reaction to obtain NH 4 -Y type molecular sieve;

[0037] (2) NH 4 -Y-type molecular sieve is subjected to hydrothermal treatment to obtain ultra-stable Y-type molecular sieve;

[0038] (3) contacting the ultra-stable Y-type molecular sieve with oxoacid and ammonium oxoacid for acid treatment, then drying and roasting to obtain a modified HY-type molecular sieve;

[0039] (4) Mix the modified HY type molecular sieve and the alumina source to form a carrier mixture, and add nitric acid aqueous solution and scallop powder to the carrier mixture to make a slurry for extruding.

[0040] According to the present invention, desodium NH is obtained through the step (1) 4 - Molecular sieve of type Y, preferably such that said desodiumized NH 4 -Na of Y mo...

Embodiment 1

[0071] This example is used to illustrate the method for preparing isooctene by mixing C4 provided by the present invention.

[0072] Weigh 120g NaY powder (SiO 2 / Al 2 o 3 The molar ratio is 5:1, Na 2 O content is 8% by weight), 60g NH 4 Mix Cl with 800g of water at room temperature, stir at 75°C for 3 hours and then filter; after suction filtration three times, add the filter residue to 800g of water, stir at 75°C for 3 hours and then filter, and repeat this operation twice. Put the obtained filter residue into a high-temperature hydrothermal treatment furnace for hydrothermal treatment. The temperature of the furnace is raised from room temperature to 550 °C at a rate of 10 °C / min, and the temperature is kept for 3 hours. The water vapor pressure in the furnace is controlled to 0.1 MPa. Add 12g oxalic acid and 18g ammonium oxalate to the molecular sieve after hydrothermal treatment and add 1.4L water to be configured into a 0.2mol / L oxalic acid and ammonium oxalate mixe...

Embodiment 2

[0078] This example is used to illustrate the method for preparing isooctene by mixing C4 provided by the present invention.

[0079] Change the concentration of oxalic acid and ammonium oxalate solution to 0.5mol / L in Example 1, control the mass ratio of modified HY molecular sieve, oxalic acid, and ammonium oxalate to be 10:3:5, and the preparation and reaction conditions of other catalysts are the same as in Example 1 .

[0080] SiO of the obtained HY molecular sieve catalyst 2 with Al 2 o 3 The molar ratio is 16, and the specific surface area is 556m 2 / g, the pore volume is 0.39cm 3 / g, the pore size is 4.5nm. The B acid amount was 380 μmol / g, the L acid amount was 220 μmol / g, and the B / L acid amount ratio was 1.72.

[0081] After calculation, the conversion rate of isobutene is 99.8%, the conversion rate of 1-butene is 10%, the total conversion rate of butene is 50.1%, the total conversion rate of other butenes except isobutene is 8.4%, and the selectivity of carbo...

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
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Apertureaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of petrochemical engineering, and discloses a method for preparing isooctene from mixed C4. The method comprises the following step: carrying out selective superposition reaction on the mixed C4 in the presence of a catalyst. The catalyst contains a Y-type molecular sieve catalyst, and the ratio of pyridine infrared B acid content to L acid content of the Y-type molecular sieve catalyst measured at 200 DEG C is 1.4-2. The adopted Y-type molecular sieve catalyst has a high silica-alumina ratio and a B / L acid amount ratio, a high isobutene conversion rate can be achieved under mild reaction conditions, superposition and isomerization reactions of 1-butene and other butene are controlled, high isobutene superposition selectivity is achieved, and meanwhile the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular, the invention relates to a method for preparing isooctene by mixing carbon four. Background technique [0002] Methyl tert-butyl ether (MTBE) is a high-octane gasoline component, its basic octane RON: 115, MON: 100, is an excellent gasoline high-octane additive and antiknock agent. At present, ethanol gasoline for vehicles is required not to artificially add oxygen-containing organic compounds, that is, etherified components such as MTBE will no longer be used as gasoline blending components. This forces oil refiners to seek solutions for the reuse of C4 raw materials and equipment after the use of MTBE is hindered. At present, the main alternative to the MTBE unit is the superposition-hydrogenation reaction of isobutene to produce isooctane with a higher octane number. Among them, the superposition of isobutene is a key step, that is, isobutene selectively participates in th...

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): C07C11/02C07C2/12B01J29/08B01J35/10
CPCC07C2/12B01J29/08B01J2229/24B01J2229/37B01J2229/40C07C2529/08B01J35/617B01J35/633B01J35/635C07C11/02
Inventor 李佳琪温朗友李明罡夏玥穜郜亮俞芳喻惠利董明会张伟
Owner CHINA PETROLEUM & CHEM CORP
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