Reaction engineering of continuous crystallization of β-ammonium tetramolybdate in concentric structure reactor and its application
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Jiangtao Li
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Zhichao Li
Abstract
β-ammonium tetramolybdate [β-(NH4)2Mo4O13] is an important product of molybdenum metallurgy because of its uniform crystal structure and excellent thermal stability. The yield of molybdenum strip produced with β-(NH4)2Mo4O13 as raw material and various processing properties have been significantly improved. However, the crystallization process of β-(NH4)2Mo4O13 is very complex, including neutralization, polymerization, nucleation, and crystal growth stages, resulting in a variety of polymerization morphology. In this work, a concentric structure reactor was used to segment these stages with directional regulation of each stage. Residence time distribution (RTD) was used to evaluate the simulation of flow field characteristics in the concentric structure reactor. Determination of the influence of inlet-outlet positions, size and position of paddle, and baffle setting on the fluid behavior in a single tank suggested measures to improve the abnormal flow condition and reduce the dead zone volume fraction. In the concentric structure reactor, the dead zone volume fraction was only 2.36% when the clapboards were arranged alternately in an up-down design, using an inlet flow rate of 100 mL/min. β-(NH4)2Mo4O13 was prepared continuously by adding aqueous ammonia and product slurry for crystallization in the concentric structure reactor.
Funding source: The National Natural Science Foundation of China
Award Identifier / Grant number: No.52174340
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was jointly supported by the National Natural Science Foundation of China (No.52174340) and the Changsha Outstanding Youth Program (kq2106011).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Artikel in diesem Heft
- Frontmatter
- Articles
- Design and parametric optimization of a fan-notched baffle structure mixer for enhancement of liquid-liquid two-phase chemical process
- Quantification of motion characteristics of vertically ascending bubbles in NaCl solution via image processing
- Particle crystallization by supercritical antisolvent processing techniques: the case of Retama raetam powder for pharmaceutical purposes
- Evaluation the performance of the tin (IV) oxide (SnO2) in the removal of sulfur compounds via oxidative-extractive desulfurization process for production an eco-friendly fuel
- Experimental and kinetic studies of biogas production from petroleum oily sludge by anaerobic co-digestion with animals’ dung at thermophilic conditions
- A study on the adsorption property and mechanism of β-cyclodextrin/polyvinyl alcohol/polyacrylic acid hydrogel for ciprofloxacin
- Evaluation of promoted Ni-based nanocatalysts in wall-coated microchannel reactor on the dry reforming of methane and effect of ultrasound waves on physiochemical properties of synthesized nanocatalysts
- Reaction engineering of continuous crystallization of β-ammonium tetramolybdate in concentric structure reactor and its application
- Bio-lubricant production based on epoxidized oleic acid derived dated palm oil using in situ peracid mechanism
Artikel in diesem Heft
- Frontmatter
- Articles
- Design and parametric optimization of a fan-notched baffle structure mixer for enhancement of liquid-liquid two-phase chemical process
- Quantification of motion characteristics of vertically ascending bubbles in NaCl solution via image processing
- Particle crystallization by supercritical antisolvent processing techniques: the case of Retama raetam powder for pharmaceutical purposes
- Evaluation the performance of the tin (IV) oxide (SnO2) in the removal of sulfur compounds via oxidative-extractive desulfurization process for production an eco-friendly fuel
- Experimental and kinetic studies of biogas production from petroleum oily sludge by anaerobic co-digestion with animals’ dung at thermophilic conditions
- A study on the adsorption property and mechanism of β-cyclodextrin/polyvinyl alcohol/polyacrylic acid hydrogel for ciprofloxacin
- Evaluation of promoted Ni-based nanocatalysts in wall-coated microchannel reactor on the dry reforming of methane and effect of ultrasound waves on physiochemical properties of synthesized nanocatalysts
- Reaction engineering of continuous crystallization of β-ammonium tetramolybdate in concentric structure reactor and its application
- Bio-lubricant production based on epoxidized oleic acid derived dated palm oil using in situ peracid mechanism
