Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (8): 80-84.doi: 10.13475/j.fzxb.20180800205

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Measurement and model fitting for solubility of Disperse Red 11 in supercritical CO2

HU Jinhua1, YAN Jun1(), LI Hong1, PENG Jianjun1, ZHENG Laijiu1, ZHENG Huanda1, HE Tingting2   

  1. 1. School of Textile and Material Engineering, Dalian Technology University, Dalian, Liaoning 116034, China
    2. Patent Examination Cooperation (Beijing) Center of the Patent Office, Beijing 100160, China
  • Received:2018-08-01 Revised:2019-05-28 Online:2019-08-15 Published:2019-08-16
  • Contact: YAN Jun E-mail:yanjun@dlpu.edu.cn

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Abstract:

In order to realize the industrial application of supercritical carbon dioxide (CO2) dyeing, a high pressure supercritical fluid experimental device was developed independently under the conditions of temperature of 353.15-393.15 K and pressure of 16-24 MPa. The solubility of Disperse Red 11 (1,4-diamino-2-methoxyanthraquinone) in supercritical carbon dioxide was measured by a dynamic method. The experimental results were fitted by Chrastil empirical model and MST equation, and the factors affecting the solubility of disperse dyes in supercritical CO2 were discussed. The results show that the higher the pressure is, the higher the density of carbon dioxide is, the higher the solubility of Disperse Red 11 in supercritical CO2. With the increase of temperature, the solubility first increases and then decreases. The optimum process conditions of solubility of Disperse Red 11 is temperature of 383.15 K and pressure of 24 MPa. The correlation level of Chrastil empirical model is above 0.90, and the correlation level of MST equation is 0.55. Chrastil empirical model has better correlation results than MST equation.

Key words: supercritical carbon dioxide, Disperse Red 11, solubility, Chrastil empirical model, MST equation

CLC Number: 

  • TS193.21

Fig.1

Disperse Red 11 molecular formula"

Fig.2

Supercritical apparatus diagram"

Tab.1

Solubility and CO2 density of Disperse Red 11 in different supercritical dissolution temperature and pressure"

P/
MPa		 T=353.15 K T=363.15 K T=373.15 K T=383.15 K T=393.15 K
y/
10-6		 ρ/
(kg·m-3)		 y/
10-6		 ρ/
(kg·m-3)		 y/
10-6		 ρ/
(kg·m-3)		 y/
10-6		 ρ/
(kg·m-3)		 y/
10-6		 ρ/
(kg·m-3)
16 2.37 468.44 4.65 408.01 7.30 363.69 8.39 330.47 6.42 304.68
18 2.76 539.07 5.06 475.67 7.87 424.81 8.94 384.99 6.94 353.55
20 3.12 593.89 5.49 533.17 8.31 480.53 9.68 436.83 7.41 401.15
22 3.67 636.74 6.01 580.38 8.59 528.94 9.95 484.04 7.93 445.86
24 4.57 671.27 6.97 619.21 9.40 570.19 10.61 528.80 8.77 486.70

Fig.3

Solubility MST fitting curve"

Fig.4

Solubility Chrastil fitting curve"

Tab.2

Parameter value and fitting level"

温度/K A C R2
353.15 -6.76 0.005 0.90
363.15 -6.15 0.004 0.92
373.15 -5.72 0.003 0.95
383.15 -5.41 0.003 0.95
393.15 -5.35 0.004 0.95
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