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

A method of comprehensively utilizing C4 fractions after etherification

A technology for post-ether carbon 4 and distillate, applied in the petrochemical field, can solve the problem of high energy consumption, and achieve the effects of simple process, low production cost and flexible control

Inactive Publication Date: 2017-04-05
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires a high concentration of C4-olefins as raw materials, a large amount of C4-olefins are recycled, and the energy consumption is high

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
  • A method of comprehensively utilizing C4 fractions after etherification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Reaction material: Acetic acid is glacial acetic acid with a purity greater than 99.5%. The C4 fraction after ether includes isobutane 44.19%, n-butane 13.23%, 1-butene 14.05%, t-2-butene 16.55%, and isobutene 0.23% And c-2-butene 11.75%, the water is deionized water, the catalyst adopts H-type macroporous strong acid styrene series cationic resin, the brand is NKC-9, and the two reactors are respectively equipped with 50g catalyst.

[0047] Step i: After ether, C4 fraction 1 and acetic acid 2 are fed from the top of the first reactor A with a metering pump, and reacted under the action of a catalyst to obtain a mixture 3. The reaction conditions are: the catalyst bed temperature is 90℃, the pressure is 1.5MPa, the molar ratio of C4 olefin to acetic acid in the C4 fraction is 0.8, and the weight space velocity of the C4 fraction is 2h -1 .

[0048] The mixture 3 flows from the bottom of the first reactor into the first separation tower C for gas-liquid separation, carbon tet...

Embodiment 2

[0055] Preparation of modified H-type macroporous strong acid styrene series cationic resin NKC-9:

[0056] Add 2.0 g of sulfamic acid and 200 ml of methanol into a 500-ml round bottom flask, and stir to dissolve the sulfamic acid. Add 180 grams of NKC-9 resin and the methanol solution with sulfamic acid dissolved into the autoclave. Install the reactor and heat it to 80℃ with stirring. After 2 hours, the temperature will be lowered and the stirring will be stopped. The temperature of the reactor will drop. After reaching room temperature, the reaction kettle was disassembled, the catalyst was poured out, dried and then baked at 80°C for 4 hours, then taken out and placed in a desiccator for later use.

[0057] Reaction raw materials: acetic acid is glacial acetic acid with a purity greater than 99.5%. The C4 fraction after ether includes 0.25% of isobutane, 20.45% of n-butane, 5.31% of 1-butene, 43.72% of t-2-butene, and 0.10% of isobutene. , C-2-butene 30.17%, water is deionized...

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 method of comprehensively utilizing C4 fractions after etherification is disclosed. The method includes i) a step of reacting the C4 fractions after etherification and acetic acid in the presence of a catalyst to obtain an acetic-acid-containing sec-butyl acetate crude product, ii) a step of subjecting water and the acetic-acid-containing sec-butyl acetate crude product to a hydrolysis reaction in the presence of a catalyst, and separating a mixture of sec-butyl acetate and sec-butyl alcohol from the mixture obtained by the reaction, and iii) a step of rectifying the mixture of sec-butyl acetate and the sec-butyl alcohol to obtain a sec-butyl acetate product and a sec-butyl alcohol product respectively. According to the method, the sec-butyl acetate and the sec-butyl alcohol which have high purity can be obtained, process procedures are simple, the utilization rate of the C4 fractions is increased and the production cost is greatly reduced.

Description

[0001] Cross-reference of related technologies [0002] This application claims the priority of the Chinese patent application CN201510624952.5 entitled "A Method for Comprehensive Utilization of C4 Fractions after Ether" filed on September 25, 2015, the entire content of which is incorporated herein by reference. Technical field [0003] The invention relates to the field of petrochemical industry. Further, it relates to a method for comprehensive utilization of C4 fractions after ether. Background technique [0004] With the changes in the pattern of petrochemical resources, the carbon four fractions from ethylene plants and refineries are becoming more and more valuable, but my country’s current use of carbon four fractions is insufficient, and the most used are the isobutylene and butadiene in the carbon four fractions. The C4 fraction of the refinery does not contain butadiene and can be directly subjected to the etherification reaction. The C4 fraction of the ethylene plant c...

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): C07C67/04C07C67/54C07C69/14C07C29/09C07C29/80C07C31/12B01J31/08
CPCC07C67/04B01J31/08B01J2231/49C07C29/095C07C29/80C07C67/54C07C69/14C07C31/12
Inventor 王定博张明森郭敬杭
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