회분식 냉각 결정화기에서 NTO의 결정화 메카니즘

김광주; 김민준; 염충균; 이정민; 최호석; 김현수; 박방삼

Journal of the Korean Industrial and Engineering Chemistry, Vol.9, No.7, 974-978, December, 1998

Export Citation

회분식 냉각 결정화기에서 NTO의 결정화 메카니즘

Crystallization Kinetics of NTO in a Batch Cooling Crystallizer

김광주, 김민준, 염충균, 이정민, 최호석, 김현수, 박방삼

초록

회분식 통풍관형(DTB) 냉각 결정화기에서 3-nitro-1,2,4,-triazol-5-one(NTO)의 결정화 메카니즘에 관한 연구가 수행되었다. 결정성장속도 및 핵생성속도에 대한 과포화 의존성이 조사되었다. 핵생성 메카니즘 판별을 위한 Mersmann 이론을 이용하여 NTO의 핵생성 거동에 대한 메카니즘이 파악되었다. DTB 결정화기에서 NTO의 핵생성 거동은 불균일핵생성과 표면핵생성이 동시에 기여함을 알 수 있었다. 핵생성속도는 과포화에 4.2승에 비례하였고 결정성장속도는 과포화의 2.9승에 비례하였다. 회분식 DTB 냉각 결정화에서 얻은 NTO 결정의 크기는 결정화 메카니즘으로부터 얻어진 상관식으로부터 검증되었다.

The kinetics of crystal growth and nucleation in dependence on the supersaturation of an aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO) were evaluated on the draft tube-baffle(DTB) crystallizer operated batchwise. The crystal growth rate is proportional to the supersaturation to the 2.9 power, and the nucleation rate to the 4.2 power. The uncleation behavior for NTO-water system in DTB crystallizer was grasped according to Mersmann's criteria. The nucleation in this crystallizer was found to act with heterogeneous nucleation and surface uncleation simultaneously. Simplified relation was derived for calculation of mean crystal size of product crystals from the batch cooling crystallizer. The obtained relation was verified by a set of experiments.

Keywords:Nucleation;Crystallization;NTO;Crystal Size;Cooling Crystallizer

[References]

Lee KY, Coburn MD, Los Alamos National Laboratory Report No. LA-10302 MS, February (1985)
Becuwe A, Delclos A, Propellants, Explosives, Pyrotech, 18, 1 (1993)
Mersmann A, Crystallization Technology Handbook, Marcel Dekker, Inc., New York (1995)
Bohlin M, Rasmuson AC, Can. J. Chem. Eng., 70, 120 (1992)
Dimond HW, Hester AS, Ind. Eng. Chem., 47, 672 (1965)
Nyvlt J, Broul M, Int. Chem. Eng., 22, 543 (1982)
Nyvlt J, Design of Crystallizer, CRC Press, Ann Arbor (1992)
Nyvlt J, Sohnel O, Matuchova M, Broul M, The Kinetics of Industrial Crystallization, Elsevier, Amsterdam (1985)
Nyvlt J, J. Cryst. Growth, 3-4, 377 (1968)
Kim KJ, Ryu SK, Chem. Eng. Commun., 159, 51 (1997)
Nyvlt J, Broul M, Collect. Czech. Chem. Commun., 44, 3549 (1979)
Kim KJ, Kim MJ, Lee JM, Kim SH, Kim HS, Park BS, Proc. CGOM, Bremen, 169 (1997)
Mersmann A, Chem. Eng. Res. Des., 74(7), 812 (1996)
Schubert H, Mersmann A, Chem. Eng. Res. Des., 74(7), 821 (1996)
Garside J, Mersmann A, Nyvlt J, Measurement of Crystal Growth Rate, European Fed. of Chem. Eng., Druckhaus Deutsch, Muenchen (1990)
Murata Y, Honda T, J. Cryst. Growth, 39, 315 (1977)
Jansens PJ, Suspension Crystallization of Organic Compounds, Thesis, Technical University Delft (1994)
Mersmann A, Angerhofer M, Gutwald T, Sangl R, Wang S, Sep. Technol., 2, 85 (1992)

[Referenced By]

[1] Lee KY, Coburn MD, Los Alamos National Laboratory Report No. LA-10302 MS, February (1985)

[2] Becuwe A, Delclos A, Propellants, Explosives, Pyrotech, 18, 1 (1993)

[3] Mersmann A, Crystallization Technology Handbook, Marcel Dekker, Inc., New York (1995)

[4] Bohlin M, Rasmuson AC, Can. J. Chem. Eng., 70, 120 (1992)

[5] Dimond HW, Hester AS, Ind. Eng. Chem., 47, 672 (1965)

[6] Nyvlt J, Broul M, Int. Chem. Eng., 22, 543 (1982)

[7] Nyvlt J, Design of Crystallizer, CRC Press, Ann Arbor (1992)

[8] Nyvlt J, Sohnel O, Matuchova M, Broul M, The Kinetics of Industrial Crystallization, Elsevier, Amsterdam (1985)

[9] Nyvlt J, J. Cryst. Growth, 3-4, 377 (1968)

[10] Kim KJ, Ryu SK, Chem. Eng. Commun., 159, 51 (1997)

[11] Nyvlt J, Broul M, Collect. Czech. Chem. Commun., 44, 3549 (1979)

[12] Kim KJ, Kim MJ, Lee JM, Kim SH, Kim HS, Park BS, Proc. CGOM, Bremen, 169 (1997)

[13] Mersmann A, Chem. Eng. Res. Des., 74(7), 812 (1996)

[14] Schubert H, Mersmann A, Chem. Eng. Res. Des., 74(7), 821 (1996)

[15] Garside J, Mersmann A, Nyvlt J, Measurement of Crystal Growth Rate, European Fed. of Chem. Eng., Druckhaus Deutsch, Muenchen (1990)

[16] Murata Y, Honda T, J. Cryst. Growth, 39, 315 (1977)

[17] Jansens PJ, Suspension Crystallization of Organic Compounds, Thesis, Technical University Delft (1994)

[18] Mersmann A, Angerhofer M, Gutwald T, Sangl R, Wang S, Sep. Technol., 2, 85 (1992)