Supercharge Your Innovation With Domain-Expert AI Agents!

Long-acting catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof

An ethylbenzene dehydrogenation production and catalyst technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of high material consumption and high energy consumption in styrene production , the service life of the catalyst is not long enough, etc., to achieve the effect of good technical effect

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is the problem of high energy consumption and high material consumption in the production of styrene due to the insufficient service life of the catalyst in the prior art. Catalyst preparation method

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
  • Long-acting catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof
  • Long-acting catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof
  • Long-acting catalyst for preparing styrene by ethylbenzene dehydrogenation and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]190.5 grams of iron oxide red, 90.1 grams of iron oxide yellow, 50.6 grams of potassium carbonate, 90.8 grams of persimmon nitrate, 10.3 grams of ammonium molybdate, 10.4 grams of magnesium oxide and carboxymethyl cellulose were stirred in a kneader for 1 hour, and an appropriate amount was added to remove Ionized water, and then stir for half an hour to make a slurry and take it out. At room temperature, add 4000 grams of support B impregnated by 0.01 mol / L ammonium molybdate solution to the slurry and stir evenly to form a uniform coating by A The catalyst particles were put into an oven and baked at 40°C for 3 hours, then placed in a muffle furnace and calcined at 800°C for 2 hours to prepare the catalyst.

Embodiment 2～6

[0041] Catalysts were prepared according to the conditions and operating steps of Example 1, except that the dosage of active components, the shape of the support, materials, etc. were changed, as shown in Table 1.

Embodiment 7～13

[0049] Soak the bisque ceramic ring at different temperatures and different Mo salt concentrations for different times, and after drying, evenly coat the active component slurry of Example 1, put it in an oven to dry, and then put it in a muffle furnace for firing. See Table 2 for the pretreatment conditions of the support body and the catalyst precursor and the thickness and compressive strength of the active components of the finished catalyst:

[0050] Table 2 The pretreatment conditions of the support and the relevant physical parameters of the catalyst prepared after coating the active component

[0051]

[0052] The catalysts obtained in Examples 1 to 13 and Comparative Example 1 were put into an isothermal reactor with an inner diameter of 1 "respectively, and the reaction pressure was normal pressure and the liquid space velocity was 1.0 hour -1 , the reaction temperature was 620°C, and the water / ethylbenzene weight ratio was 2.0, and the catalytic performance of et...

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
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a long-acting catalyst for preparing styrene by ethylbenzene dehydrogenation and a preparing method thereof, which mainly solves the problem of short service life of the catalyst in the prior art. Aiming at well solving the problem, the method adopts the technical scheme that at least one unglazed porcelain immersed with a soluble Mo salt solution, alpha-alumina, and a natural or processed composite or mixed oxide material is adopted as a support body, and the surface of the support body is uniformly coated with a slurry containing active components, such as Fe2O3 (ferric oxide), K2O (potassium oxide), Ce2O3 (cerous oxide) and MoO3 (molybdenum oxide). The long-acting catalyst and the preparing method can be used for the industrial production of the styrene.

Description

technical field [0001] The invention relates to a long-acting catalyst used for dehydrogenating ethylbenzene to prepare styrene and a preparation method thereof. Background technique [0002] As one of the most important raw materials for basic organic synthesis, 85% of styrene in industry is realized by direct catalytic thermal dehydrogenation of ethylbenzene under negative pressure. The basic composition of the catalyst used includes main catalyst, co-catalyst, porogen, reinforcing agent and so on. At present, what has been adopted by many styrene manufacturers in various countries in the world is a series of composite / mixed oxide catalysts based on Fe-K-Ce-Mo developed successfully in the early 1980s. The catalyst preparation method generally uses Fe, K , Ce, Mo and other catalyst components in the form of oxides or salts are solid-phase mixed, kneaded with water, extruded, dried, and roasted, such as published US patents US4804799, US5023225 and US5190906. The characte...

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): B01J23/887C07C15/46C07C5/333
CPCY02P20/52
Inventor 陈铜倪军平宋磊危春玲张新玉缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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