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

Preparation method of catalyst for synthesizing allyl acetate

A technology of allyl acetate and catalyst, which is applied in the field of preparation of catalysts for the synthesis of allyl acetate, can solve the problems of low space-time yield and selectivity, and achieve improved space-time yield and selectivity, good dispersibility, The effect of good technical effects

Active Publication Date: 2014-06-25
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by this invention is the problem that the space-time yield and selectivity of synthetic allyl acetate catalyst are lower in the prior art, and a kind of preparation method of allyl acetate catalyst is provided, the catalyst that this method makes has space The characteristics of high yield and selectivity

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
  • Preparation method of catalyst for synthesizing allyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Catalyst preparation

[0016] Step (a): Take 1200ml of an aqueous solution containing chloropalladium acid and copper chloride as the impregnation solution, wherein the palladium content in the solution is 2.75g / L, the copper content is 0.625 g / L, and impregnate 1100ml of 4~6mm in diameter Spherical silica carrier obtains catalyst precursor I;

[0017] Step (b): 27.5 g of sodium silicate nonahydrate was formulated into 100 ml of aqueous solution and added to the catalyst precursor I, mixed uniformly, left standing for 24 hours, and then dried at 80 ° C for 8 hours to prepare the catalyst precursor II;

[0018] Step (c): Take 100ml of an aqueous solution containing polyvinylpyrrolidone (weight-average molecular weight: 360,000), wherein the content of polyvinylpyrrolidone is 100g / L, impregnate catalyst precursor II to prepare catalyst precursor III;

[0019] Step (d): reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2 ml / min,...

Embodiment 2

[0033] [Example 2] to [Example 11]

[0034] In addition to the type of palladium-containing compound and copper-containing compound, the content of palladium-containing compound and copper-containing compound, the type of stabilizer, the concentration of the stabilizer, the weight-average molecular weight of the stabilizer, the weight ratio of the stabilizer, the type of reducing agent and reducing Except temperature has change, other steps are all identical with embodiment 1. For the convenience of comparison, the preparation conditions of the catalyst are listed in Table 1, and the physical properties of the catalyst and the space-time yield and selectivity data of the catalyst are listed in Table 2.

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 preparation method of a catalyst for synthesizing allyl acetate, and mainly overcoming the problems of low space time yield and selectivity of a conventional catalyst for allyl acetate. The preparation method of the catalyst for synthesizing allyl acetate comprises the following steps of (a) impregnating a carrier in a solution dissolving a palladium-containing compound and a copper-containing compound to obtain a catalyst precursor I; (b) treating the catalyst precursor I with an alkali solution to obtain a catalyst precursor II; (c) impregnating the catalyst precursor I in a solution containing a stabilizer to obtain a catalyst precursor III, wherein the stabilizer is polyvinyl pyrrolidone or polyacrylic acid alkali metal salt or a mixture of the above two; (d) reducing the catalyst precursor III by using a reducing agent to obtain a catalyst precursor IV; and (e) impregnating the catalyst precursor IV with an alkali metal acetate solution, drying to obtain a finished product of the catalyst. By adopting the above technical solution, the problems are overcome relatively well; and the preparation method can be used for industrial production of allyl acetate.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for synthesizing allyl acetate. Background technique [0002] Allyl acetate is an important chemical raw material with a wide range of uses. The main method of producing allyl acetate in the world today is to synthesize propylene, oxygen and acetic acid through gas-phase catalytic reaction as raw materials. In order to obtain catalysts with high space-time yield and high selectivity, continuous improvements have been made in the composition of the active components of the catalyst, the preparation process, and even the shape. [0003] European patent EP0361484A2 (title: Process for preparation allyl acetate) provides a method for preparing a catalyst loaded with a main catalyst noble metal, a promoter metal and an alkali metal or alkaline earth metal compound. The specific manufacturing process is as follows: add the prepared mixed solution of noble metal and co-catalyst, dry it, and then tr...

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): B01J31/04B01J37/18C07C67/055C07C69/155
Inventor 刘军晓杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
Features
  • Generate Ideas
  • 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