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

Method for producing tetramethylethylene by using isobutene

A technology of tetramethylethylene and isobutylene, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problem of low weight yield of tetramethylethylene, and achieve increased weight yield and improved selectivity and the effect of improving the yield and disproportionation performance

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low tetramethylethylene weight yield in the prior art, and a new method for producing tetramethylethylene from isobutylene is provided

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 tetramethylethylene by using isobutene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1 kg of silica gel and 10 grams of scallop powder into the blender and stir for 45 minutes. After kneading evenly, add 400 grams of silica sol and 113 grams of ammonium metatungstate. At the same time, add 1 kg of deionized water, knead, squeeze, dry, and then Calcined at 550°C for 4 hours to obtain a pale yellow finished disproportionation catalyst with a tungsten oxide content of 8%.

[0019] Add 50 grams of magnesium oxide into deionized water to obtain 300 grams of solution, heat and stir the solution in a water bath at 80°C for 5 hours, then filter the water in the solution with suction, dry the product at 120°C for 6 hours, and roast at 550°C for 6 hours to obtain Finished magnesium oxide.

[0020] Magnesium oxide and 8%WO in the process of catalyst loading 3 / SiO 2 The weight ratio is 4. The operating conditions of the reactor are: the reaction temperature is 380°C, the absolute pressure is 0.1MPa, and the weight space velocity of isobutylene is 1 hour -1...

Embodiment 2～6

[0023] React by each condition and step of [Example 1], just change different operating parameters, and the results are listed in Table 1.

[0024]

Embodiment 7

[0026] React by each condition and step of [embodiment 1], just add 137.6 gram zirconium nitrates when adding 50 gram magnesium oxides. The weight ratio of magnesium oxide to zirconium oxide in the prepared catalyst was 1:1, the evaluation conditions were the same as in Example 1, and the reaction results are shown in Table 1.

[0027]

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

The invention relates to a method for producing tetramethylethylene by using isobutene and mainly solves the problem of low weight yield of the tetramethylethylene. The method uses isobutene as a raw material which is in contact with a catalyst under a certain condition to obtain the tetramethylethylene, wherein the catalyst comprises a disproportionation catalyst and an isomerization catalyst, the disproportionation catalyst is WO3 / SiO2, and the loaded tungsten oxide capacity is 5-15 percent; the isomerization catalyst is magnesia, and the weight ratio of the isomerization catalyst to the disproportionation catalyst is 2-8. Due to the adoption of the technical scheme, the problem is well solved. Therefore, the method can be used for industrial production in which the tetramethylethylene is prepared by adopting the isobutene.

Description

technical field [0001] The invention relates to a method for producing tetramethylethylene from isobutylene. Background technique [0002] Tetramethylethylene, that is, 2,3-dimethyl-2-butene, as a high value-added olefin product, can be used as an intermediate for pesticides and spices, and is the main raw material for the synthesis of chrysanthemic acid. At the same time, it is also used in the production of spices and other agricultural chemicals, especially in the production of tuna musk spices by replacing neohexene, which has the advantages of low cost and stable product quality. The synthesis of tetramethylethylene has received much attention. At present, the conventional production method of tetramethylethylene in industry is to generate through propylene dimerization, and the catalyst used is a homogeneous complex catalyst. Through olefin disproportionation technology, relatively excess low-value-added C4 olefins can be converted into high-value-added tetramethylet...

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 & Authority Applications(China)
IPC IPC(8): C07C11/107C07C2/00
Inventor 王仰东宣东董静肖永厚
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