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

A rod-shaped amorphous/anatase tio 2 Preparation method and application of composite catalyst

A composite catalyst, anatase type technology, is applied in the field of preparation of rod-shaped anatase/amorphous titanium dioxide polyester catalyst, and can solve the problems of affecting the molecular weight and mechanical properties of polyester, difficult to control catalytic activity, affecting the color of polyester, etc., Achieve excellent catalytic performance, good hue and mechanical properties, and improve reaction efficiency

Active Publication Date: 2021-02-12
常州大学盱眙凹土研发中心
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems of the current titanium-based polyester catalysts are: ① anatase titanium dioxide (TiO 2 ) catalyst activity is high, there are many side reactions, and the catalytic activity is difficult to control, which will eventually affect the polyester hue; amorphous TiO 2 The catalytic activity is relatively low, which affects the molecular weight and mechanical properties of polyester
② These titanium-based polyester catalysts still have disadvantages such as easy agglomeration and poor dispersion performance

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 rod-shaped amorphous/anatase tio <sub>2</sub> Preparation method and application of composite catalyst
  • A rod-shaped amorphous/anatase tio <sub>2</sub> Preparation method and application of composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Add 2.069 grams of rod-shaped potassium titanate powder to 41.380 grams of 2 mol / liter hydrochloric acid solution, soak for 6 hours, filter and wash until the pH value of the filtrate is 5, and obtain TiO 2 The filter cake was then dried and pulverized at 60°C to obtain an amorphous rod-like TiO 2 Powder;

[0021] 2. Redisperse the powder obtained in step 1 to 31.960 grams of TiCl with a molar concentration of 2.0 mol / L 4 In solution, amorphous rod-like TiO 2 Powder and TiCl 4 The mass ratio of the solution is 0.05:1. At 0°C, while stirring, dropwise add a 10% sodium silicate solution to the obtained dispersion until the pH of the system is 2; after the addition, the system Continue to heat up to 70°C, continue to stir for 1 hour, filter, wash, and dry to obtain a rod-shaped amorphous / anatase TiO 2 Composite catalyst.

Embodiment 2

[0023] 1. Add 4.138 grams of rod-shaped potassium titanate powder to 33.104 grams of 4 mol / liter sulfuric acid solution, soak for 15 hours, filter and wash until the pH value of the filtrate is 5.5, and obtain TiO 2 The filter cake was then dried and pulverized at 70°C to obtain an amorphous rod-shaped TiO 2 Powder;

[0024] 2. Redisperse the powder obtained in step 1 to 25.568 grams of TiCl with a molar concentration of 3.0 mol / L 4 In solution, amorphous rod-like TiO 2 Powder and TiCl 4 The mass ratio of the solution is 0.125:1. Under the condition of 5°C, while stirring, dropwise add a potassium silicate solution with a mass percentage concentration of 15% to the obtained dispersion until the pH value of the system is 2.5; after the addition, the system Continue to heat up to 70°C, continue to stir for 2 hours, filter, wash, and dry to obtain a rod-shaped amorphous / anatase TiO 2 Composite catalyst.

Embodiment 3

[0026] 1. Add 6.207 grams of rod-shaped potassium titanate powder to 31.035 grams of 6 mol / liter nitric acid solution, soak for 24 hours, filter and wash until the pH value of the filtrate is 6, and obtain TiO 2 The filter cake was then dried and pulverized at 80°C to obtain an amorphous rod-shaped TiO 2 Powder;

[0027] 2. Redisperse the powder obtained in step 1 to 23.970 grams of TiCl with a molar concentration of 4.0 mol / L 4 In solution, amorphous rod-like TiO 2 Powder and TiCl 4 The mass ratio of the solution is 0.2:1. Under the condition of 10°C, while stirring, dropwise add a potassium silicate solution with a mass percentage concentration of 20% to the obtained dispersion until the pH value of the system is 3; after the addition, the system Continue to heat up to 80°C, continue to stir for 3 hours, filter, wash, and dry to obtain a rod-shaped amorphous / anatase TiO 2 Composite catalyst.

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 belongs to the technical field of synthesis of polyester catalysts, and particularly relates to a preparation method and an application of a rod-shaped amorphous / anatase type titanium dioxide polyester catalyst. The preparation method comprises the following steps of adding rod-shaped potassium titanate powder into an inorganic acid solution, and performing soaking, filtering and washing to obtain a TiO2 filter cake, and next, carrying out drying and crushing to obtain amorphous rod-shaped TiO2 powder; enabling the amorphous rod-shaped TiO2 powder to be dispersed into a TiCl4 solution, and under the condition of 0-10 DEG C, enabling a sodium silicate solution to be dropwise added into the obtained dispersion liquid while stirring; and after the dropwise addition is completed,continuing to heat the system to 70-80 DEG C, and carrying out a stirring reaction to prepare an amorphous / anatase type rod-shaped TiO2 composite material, wherein the composite material is used as acatalyst for polyester synthesis. The rod-shaped amorphous / anatase type TiO2 composite catalyst has excellent catalytic performance and reinforcing performance, and the catalytic synthesized polyester has high hue and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of polyester catalyst synthesis, and in particular relates to a preparation method and application of a rod-shaped anatase / amorphous titanium dioxide polyester catalyst. Background technique [0002] Polyethylene terephthalate (PET) is a saturated polyester with the largest output and widest application among polyester varieties. It has excellent properties such as light weight, durability, wear resistance and high strength, and has been widely used in food Packaging, film and electrical insulation materials, etc. The output of polyester in my country and even in the world is huge. In 2018, the global PET output reached more than 80 million tons, and my country's output was about 40 million tons, ranking first in the world. At present, more than 90% of the world's PET production uses antimony-based catalysts. This type of catalyst has the advantages of high catalytic activity, small promotion of side reacti...

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 Patents(China)
IPC IPC(8): C08G63/87C08G63/85C08G63/183
CPCC08G63/183C08G63/85C08G63/87
Inventor 左士祥姚超严向玉曹叶皖刘文杰李霞章刘经伟
Owner 常州大学盱眙凹土研发中心