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Prepn and application of titanium silicate adsorbent with high adsorption performance

A titanium silicate, high adsorption technology, applied in chemical instruments and methods, silicon compounds, other chemical processes, etc., can solve the problems of low crush resistance, low dehumidification capacity, and high regeneration temperature, and achieve reduced wear rate and desorption. The effect of fast speed and low regeneration temperature

Inactive Publication Date: 2003-01-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing adsorbent materials such as low crushing strength, high regeneration temperature, small dehumidification capacity and low dehumidification capacity in the low-humidity range, and research and develop an adsorbent material with large adsorption capacity, low regeneration temperature and high mechanical strength. Preparation method of high adsorption performance titanium silicate adsorbent

Method used

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  • Prepn and application of titanium silicate adsorbent with high adsorption performance
  • Prepn and application of titanium silicate adsorbent with high adsorption performance
  • Prepn and application of titanium silicate adsorbent with high adsorption performance

Examples

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Effect test

Embodiment 1

[0019] The selected raw materials are: ethyl orthosilicate (TEOS), tetrabutyl titanate (TBtOT), ethanol, polyethylene glycol (PEG-600), water, nitric acid, and the specific steps are: (1) under ice-water bath, In a 500mL flask equipped with a magnetic stirrer, dropping funnel and reflux device, add 250g (0.481mol) of 40% TEOS ethanol solution, get 26mL 0.1mol / L nitric acid and 30.3mL deionized water (water / alcoholate molar ratio 6) Mix evenly in the dropping funnel and slowly drop it into the flask. After reacting for 30 minutes, heat up to 45°C. According to Si / Ti=12, add 34.1g of 40% TBtOT ethanol solution (4.01×10 -2 mol), stir evenly, continue to add dropwise the remaining acid solution to make it fully hydrolyzed, after further reaction for 80 minutes, add 1.25g PEG-600 (2.08×10 -3 mol), continue to react for 50 minutes, and cool to room temperature. Stable sol can be formed by aging at 25°C for 7 days; (2) Using oil-free molding technology, adjust the pH value to make t...

Embodiment 2

[0021] The selected raw materials are: ethyl orthosilicate (TEOS), tetrabutyl titanate (TBtOT), ethanol, polyethylene glycol (PEG-600), water, nitric acid, and the specific steps are: (1) under ice-water bath, In a 500mL flask equipped with a magnetic stirrer, dropping funnel and reflux device, add 250g (0.481mol) of 40% TEOS ethanol solution, get 26mL 0.1mol / L nitric acid and 67.8mL deionized water (water / alcoholate molar ratio 10) Mix evenly in the dropping funnel and slowly drop it into the flask. After reacting for 30 minutes, heat up to 45°C. According to Si / Ti=12, add 34.1g of 40% TBtOT ethanol solution (4.01×10 -2 mol), stir evenly, continue to add dropwise the remaining acid solution to make it fully hydrolyzed, after further reaction for 80 minutes, add 1.25g PEG-600 (2.08×10 -3mol), continue to react for 50 minutes, and cool to room temperature. Stable sol can be formed by aging at 25°C for 7 days; (2) Using oil-free molding technology, adjust the pH value to make t...

Embodiment 3

[0023] The selected raw materials are: ethyl orthosilicate (TEOS), tetrabutyl titanate (TBtOT), ethanol, polyethylene glycol (PEG-600), water, nitric acid, and the specific steps are: (1) under ice-water bath, In a 500mL flask equipped with a magnetic stirrer, dropping funnel and reflux device, add 250g (0.481mol) of 40% TEOS ethanol solution, get 26mL 0.1mol / L nitric acid and 114.7mL deionized water (water / alcoholate molar ratio 15) Mix evenly in the dropping funnel and slowly drop it into the flask. After reacting for 30 minutes, heat up to 45°C. According to Si / Ti=12, add 34.1g of 40% TBtOT ethanol solution (4.01×10 -2 mol), stir evenly, continue to add dropwise the remaining acid solution to make it fully hydrolyzed, after further reaction for 80 minutes, add 1.25g PEG-600 (2.08×10 -3 mol), continue to react for 50 minutes, and cool to room temperature. Stable sol can be formed by aging at 25°C for 7 days; (2) Using oil-free molding technology, adjust the pH value to make...

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Abstract

The material for preparing titanium silicate adsorbent has molar ratio between Si and Ti of 8-20,and the proportion among alkoxide, water and polyethylene glycol of 1 to 5-15 to 0.002-0.005. The preparation includes the steps of sol preparation and titanium silicate preparation. The sol preparation includes partial hydrolysis of ethanol solution of silanolate, adding ethanol solution of titanic alkoxide while heating for complete hydrolysis; and adding polyethylene glycol for condensation to form sol. In the titanium silicate preparation, the sol is prepared into hydrogel through oil-free formation process and the hydrogel is then prepared into nano spherical titanium silicate via washing, drying and sieving. The titanium silicate product has high adsorption performance and is used in producing core of dehumidifying wheel.

Description

(1) Technical field [0001] The invention belongs to adsorption gas drying and purification technology, in particular to a preparation method and application of a high-adsorption performance titanium silicate adsorbent used in the adsorption gas drying and purification process. (2) Background technology [0002] Adsorption gas drying and purification technology has become one of the sustainable development technologies because of its remarkable advantages in low-grade energy utilization and environmental protection. In the adsorption gas drying and purification technology, the adsorbent is the key to determine the adsorption performance. The adsorber can be divided into fixed bed adsorber and rotary adsorber according to the type. The adsorbent is selected from the practicability and used in the fixed bed adsorber. Adsorbents are generally silica gel, aluminum glue, molecular sieve, etc., but silica gel and aluminum glue have low crushing strength, and are easy to burst and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30
Inventor 丁静方玉堂杨晓西杨建平高学农张正国
Owner SOUTH CHINA UNIV OF TECH
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