Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing acyclicacrylic acid from glycerinum

A technology of acrylic acid and glycerin, which is applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc. It can solve the problems of low yield of acrylic acid, high production efficiency, large investment, etc.

Active Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A large amount of glycerin dehydration to prepare acrolein has been reported, such as patent CN101070276A reported acidic molecular sieve as catalyst, 200-500 ℃, pressure 0.001-3.0MPa, liquid space velocity 0.1-100h -1 , the yield of acrylic acid can reach 70-80%, but the molecular sieve catalyst has the problem of poor high-temperature hydrothermal properties: patents CN102936189A, CN102942462A, using pyridine, imidazole and quaternary ammonium salt ionic liquid as catalysts, at a reaction temperature of 250-350 °C, the molar ratio of ionic liquid to glycerol is 0.1:100-1.5:100, acrolein is prepared from glycerin liquid phase dehydration, the conversion rate of glycerol is 100%, and the yield of product acrolein is 30.5-68.2%, but the ion The cost of liquid catalyst is high, and the production efficiency is not as high as that of fixed bed reactor.
Patent CN 105498845 A uses a supercritical CO 2 The CsPW / Zr-MCM-41 catalyst prepared in the environment, using this catalyst, the conversion rate of glycerin can reach 65.2-100%, and the selectivity of acrolein can reach 56.8-85.4%. However, supercritical conditions require high equipment and large investment
[0006] But the catalyst acrylic acid yield of prior art is on the low side

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 acyclicacrylic acid from glycerinum
  • Method for producing acyclicacrylic acid from glycerinum
  • Method for producing acyclicacrylic acid from glycerinum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Take 400ml of commercially available SiO 2 Carrier powder, 20g graphite, 40g deionized water, mixed evenly, pelletized, dried at 120°C, calcined at 500°C for 2 hours, prepared Raschig ring carrier particles.

[0067] 3.5g platinum tetrachloride (PtCl 4 ) was dissolved in 100g of water to obtain a platinum tetrachloride aqueous solution. Take 200ml of carrier particles, pour the platinum tetrachloride aqueous solution into it, stir thoroughly, dry at 120°C, and roast at 500°C for 2 hours to obtain a catalyst. The catalytic activity is shown in Table 1 .

Embodiment 2

[0069] Take 400ml of commercially available TiO 2 Carrier powder, 20g graphite, 40g deionized water, mixed evenly, pelletized, dried at 120°C, calcined at 500°C for 2 hours, prepared Raschig ring carrier particles.

[0070] 5.2g hydrated ruthenium trichloride (RuCl 3 ·3H 2 O) dissolved in 100g of water to obtain an aqueous solution of ruthenium trichloride, take 200ml of carrier particles, pour the aqueous solution of ruthenium trichloride into it, fully stir, dry at 120°C, and roast at 500°C for 2 hours to obtain a catalyst. The catalytic activity is shown in the table 1.

Embodiment 3

[0072] Take 400ml of commercially available niobium pentoxide carrier powder, 20g of graphite, and 40g of deionized water, mix them uniformly, punch into tablets, dry at 120°C, and roast at 500°C for 2 hours to prepare Raschig ring carrier particles.

[0073] 3.6g iridium trichloride hydrate (IrCl 3 ·3H 2 O) be dissolved in 100g of water to obtain iridium trichloride aqueous solution, take 200ml of carrier particles, pour the iridium trichloride aqueous solution into it, fully stir, dry at 120°C, and roast at 500°C for 2 hours to obtain the catalyst. The catalytic activity is shown in the table 1.

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 acyclicacrylic acid from glycerinum, and mainly aims to solve the problem of low acyclicacrylic acid yield in a process for synthesizing the acyclicacrylic acid from the glycerinum. The method for producing acyclicacrylic acid from glycerinum comprises the following steps: making a raw material containing glycerinum and a raw material containing oxygen be in contact with a catalyst; dehydrating the glycerinum to generate acrolein; further oxidizing the acrolein into the acyclicacrylic acid. The catalyst is prepared from a carrier and an active component, wherein the active component is selected at least one of Pt, Re and Rh. By adopting the technical scheme, the technical problem is solved well. The method can be applied to the industrial production for the synthesis of the acyclicacrylic acid from the glycerinum.

Description

technical field [0001] The present invention relates to a method for producing acrylic acid from glycerin. Background technique [0002] Acrylic acid (CH 2 =CH-COOH) is the simplest unsaturated carboxylic acid, which is an important organic synthesis raw material and synthetic resin monomer. Acrylic acid is mainly used to synthesize advanced water-absorbent resins and water treatment agents, etc., and a part of acrylic acid is used for esterification to manufacture acrylates such as methyl acrylate, ethyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate, while Acrylate polymers are mainly used in adhesives, coatings, textiles, plastics, leather, paper and other fields. [0003] Acrylic acid and its series of products have developed rapidly in recent years. In 2015, the world's total output of acrylic acid and its esters reached 7.7 million t / a, an increase of about 27% compared with 6.07 million t / a at the end of 2013. At present, the production of acrylic acid The in...

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): B01J23/42B01J23/46B01J23/648B01J27/195C07C51/25C07C57/045
CPCC07C45/29C07C51/252B01J23/002B01J23/42B01J23/462B01J23/6484B01J27/195C07C57/04C07C47/22
Inventor 徐文杰姜家乐杨斌王伟华
Owner CHINA PETROLEUM & CHEM CORP