Study of Reactive Precipitation in Vortex Impinging Streams Reactor

Abstract:

The vortex impinging streams technology (VIS) has good micromixing in the precipitation processes. The experiments were loaded with two reactants, BaCl₂ and Na₂SO₄, using ethylene diamine tetraacetic acid (EDTA) as complexing agent, to prepare BaSO4 in the vortex impinging streams reactor at Re=2500, comparing with those in the stirred tank reactor (STR). The products were characterized by XRD, TEM, BET and FTIR. The results indicate barium sulfate superfine particles are crystallized in the orthorhombic structure with lattice parameters a=7.156 Å, b=8.881 Å, and c=5.454 Å. The size of the ellipsoidal particles from VIS is about 386 nm, with narrower distribution and finer dispersity than that from STR. The specific surface area of the particles from VIS is 29.25 m²/g, comparing to 11.95 m²/g from STR. The infrared spectra decades the surface of the prepared BaSO₄ absorbs the functional group of EDTA.

• Periodical: Advanced Materials Research (Volumes 455-456)
• Pages: 617-623
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.455-456.617
• Online since: January 2012
• Authors: You Feng Li, Hong Qi Ye, Xian Da He, Hui Liu
• Keywords: Barium Sulfate, Dispersity, Micromixing, Stabilizer, Vortex Impinging Streams

References

[1] Mann S, Molecular tectonics in biomineralization and biomimetic materials chemistry [J], Nature. 1993, 365: 499-505.

DOI: 10.1038/365499a0

[2] J. Rieger, J, Thieme, C. Study of Precipitation Reactions by X-ray Microscopy: CaCO3 Precipitation and the Effect of Polycarboxylates [J], Langmuir. 2000, 16: 8300-8305.

DOI: 10.1021/la0004193

[3] Li M, Mann S, Emergence of Morphological Complexity in BaSO4 Fibers Synthesized in AOT Microemulsions [J], Langmuir. 2000, 16: 7088-7094.

DOI: 10.1021/la0000668

[4] Dirkksen J A, Ring T A, Fundamentals of crystallization: Kinetic effects on particle size distributions and morphology [J], Chem. Eng. Sci. 1991, 46: 2389-2394.

DOI: 10.1016/0009-2509(91)80035-w

[5] JIA Zhi-qian, LIu Zhong-zhou, HE Fei. Synthesis of nanosized BaSO4 and CaCO3 particles with a membrane reactor: effects of additives on particles [J]. Journal of Colloid and Interface Science, 2003, 266: 322–327.

DOI: 10.1016/s0021-9797(03)00187-5

[6] Johannes G, Hans-Christoph S, Florian S, Michael M, Wolfgang P. Precipitation of nanoparticles in a T-mixer: Coupling the particle population dynamics with hydrodynamics through direct numerical simulation [J]. Chemical Engineering and Processing, 2006, 45: 908–916.

DOI: 10.1016/j.cep.2005.11.012

[7] Elperin I T, Heat and mass transfer in opposing currents [J], J. Eng. Phys. 1961, 6: 62–68.

[8] Asha G, Preetam S, Shivakumara C, Synthesis of BaSO4 nanoparticles by precipitation method using sodium hexametaphosphate as a stabilizer[J]. Solid State Communications, 2010, 150: 386-388.

DOI: 10.1016/j.ssc.2009.11.039

[9] Takiyama K, Formation and Aging of Precipitates. IX. Formation of Monodispersed Particles (2) Barium Sulfate Precipitate by EDTA Method [J], Bull. Chem. Soc. Jpn. 1958, 31: 950–953.

DOI: 10.1246/bcsj.31.950

[10] Van der Leeden M C, Van Rosmalen G M, Effect of the molecular weight of polyphosphinoacrylates on their performance in BaSO4 growth retardation[J], J. Cryst. Growth, 1990, 100: 109–116.

DOI: 10.1016/0022-0248(90)90613-p

[11] Kipp S, Lacmann R, Reichelt M, Tailor-made additives to influence the habit of barite (BaSO4) obtained by precipitation[J], Chem. Eng. Tech. 1996, 19: 543–549.

DOI: 10.1002/ceat.270190612

[12] Bhari M N, Haznan A, Kwang Deog J, Kye S Y, Preparation of mesostructured barium sulfate with high surface area by dispersion method and its characterization[J]. Journal of Colloid and Interface Science, 2007, 316: 645–651.

DOI: 10.1016/j.jcis.2007.09.004

[13] Bala H, Fu W, Zhao J, Ding X, Jiang Y, In situ preparation and surface modification of barium sulfate nanoparticles[J], Colloids Surf. A, 2005, 252: 71-76.

[14] Judat B, Kind M, Morphology and internal structure of barium sulfate—derivation of a new growth mechanism [J], J. Colloid Interface Sci. 2004, 269: 341-353.

DOI: 10.1016/j.jcis.2003.07.047

[15] Li M, Colfen H, Mann S, Morphological control of BaSO4 microstructure by double hydrophilic block copolymer mixtures[J], J. Mater. Chem. 2004, 14: 2269-2276.

DOI: 10.1039/b400803k

[16] Asha G, Preetam S. Shivakumara C, Synthesis of nanoparticles by precipitation method using sodium hexa metaphosphate as a stabilizer[J], Solid State Communications, 2010, 150(10): 386-388.

DOI: 10.1016/j.ssc.2009.11.039

[17] Robinson K L, Weaver J V M, Armes S P, Synthesis of controlled-structure sulfate-based copolymers via atom transfer radical polymerization and their use as crystal habit modifiers for BaSO4[J], J. Mater. Chem. 2002, 12: 890-896.

DOI: 10.1039/b200348c

[18] Won D C Y, Jaworski, G Z, Nienow A W, Effect of ion excess on particle size and morphology during Barium Sulphate precipitation: an experimental study [J], Chem. Eng. Sci. 2001, 56: 727-734.

DOI: 10.1016/s0009-2509(00)00282-7

[19] Fournier M C. A new parallel competing reaction system for assessing micromixing efficiency—experimental approach, Chem. Eng. Sci. 1996, 51 (22): 5053–5064.

DOI: 10.1016/0009-2509(96)00270-9

[20] Guichardon P, Falk L. Characterization of micromixing by the iodide–iodate reaction system. Part I: experimental procedure, Chem. Eng. Sci. 2000, 55: 4233–4243.

DOI: 10.1016/s0009-2509(00)00068-3

[21] Fournier M C, Falk L, Villermaux J, A new parallel competing reaction system for assessing micromixing efficiency-determination of micromixing time by a simple mixing model, Chem. Eng. Sci. 1996, 51 (23) : 5187–5192.

DOI: 10.1016/s0009-2509(96)00340-5

[22] Phillips R, Rohani S, Baldyga J. Micromixing in a single-feed semibatch precipitation process, AIChE J. 1999, 45 (1): 82–92.

DOI: 10.1002/aic.690450108

[23] Jones F, Jones P, Mark I O, The interaction of EDTA with barium sulfate[J], Journal of Colloid and Interface Science, 2007, 316: 553-561.

DOI: 10.1016/j.jcis.2007.09.005