Author: Raymond Vivian Austin
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Nathan Micheal Aumock
Publisher:
ISBN:
Category :
Languages : en
Pages : 230

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Book Description
A process is proposed to perform separations via crystallization by using multiple tanks and constraining crystal growth to solid surfaces. Multiple tanks allow multiple recrystallizations to improve product purity and to ensure high recovery of the component of interest. Crystal growth on solid surfaces avoids multi-phase flow handling which can cause operational difficulties. A model is developed for this process for solid solution forming systems which is also applied to batch crystallization for comparison. The solid product from the process is found to provide enhanced purity (1-2% increase) at yields approaching the batch yield when a large number of tanks are used; the ratio of incorporation rate constants (?) is significantly less than one; and the surface equilibrium constant (K) is less than order one. The liquid effluent from the process is also a viable product when ?>1 and K is close to or greater than one. The use of a sweep stream entering at a tank up-stream of the feed tank was determined to be undesirable due to diminished yield. Batch experiments performed to validate the proposed model with asparagine as the component of interest and aspartic acid as the impurity in water were found to be inconclusive. Fitting of parameter values to the liquid phase was not successful due to crystal growth on surfaces other than the designated seed. The parameters ? and K fitted to solid phase data were found to be 0.1-3 and 0.4-0.6 respectively which are favorable parameters for use of the semi-continuous process with the solid taken as the product. The presence of crystals on multiple surfaces in the liquid phase indicates that constraint of crystallization to a specific surface was not achieved. The impurity distribution in the solid layer did not match the model prediction throughout the crystal. Non-uniform initial growth behavior or uneven dissolution of the crystal during analysis could cause the observed behavior. Further experiments should be conducted that in-crease the ratio of product to accumulation in the liquid phase and employ solid sampling methods that give more consistent results.

Author: Peter K'O-Chun Shen
Publisher:
ISBN:
Category : Crystallization
Languages : en
Pages : 266

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Author: Henry Reginald Clive Pratt
Publisher:
ISBN:
Category : Separation (Technology).
Languages : en
Pages : 572

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Book Description

Author: Allan S. Myerson
Publisher: VCH
ISBN:
Category : Science
Languages : en
Pages : 440

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Book Description
Developed from a symposium sponsored by the International Chemical Congress of the Pacific Basin Societies, Honolulu, Hawaii, December 1989, this book presents the current research which will aid in the development, implementation, and improvement of crystallization as a separation and purification process. Sections cover basic studies, including crystal growth, nucleation, impurity-crystal interactions, and solution structure; crystallizer operation and control; crystallization of organic and biomolecules; and crystallization and precipitation of inorganic materials. Annotation copyrighted by Book News, Inc., Portland, OR

Author: American Institute of Chemical Engineers
Publisher:
ISBN:
Category : Crystallization
Languages : en
Pages : 31

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Book Description

Author: C. Judson King
Publisher: Courier Corporation
ISBN: 0486491730
Category : Technology & Engineering
Languages : en
Pages : 1096

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Book Description
Originally published: New York: McGraw-Hill, 1971. 2nd ed. Includes a new introduction.

Author: Alan G. Jones
Publisher: Elsevier
ISBN: 0080494315
Category : Technology & Engineering
Languages : en
Pages : 361

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Book Description
Crystallization Process Systems gives a clear, concise, balanced and up to date presentation of crystallization and solid-liquid separation of the crystalline product. The information is presented in a coherent, concise and logical sequence based on the fundamentals of particulate crystallization processes as systems.By emphasising the analysis, design and operation of particulate crystallization processes as systems, the reader will be able to make a better judgement about the best, cheapest and most effective production method to use. Presents a coherent, concise and logical sequence based on the fundamentals of particulate crystallization processes as systemsEmphasis on the design and optimization of the crystallization processing system

Author: Robert B. Long
Publisher: CRC Press
ISBN: 1000148521
Category : Science
Languages : en
Pages : 484

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Book Description
This work offers an accessible discussion of current and emerging separation processes used for waste minimization, showing how the processes work on a day-to-day basis and providing troubleshooting tips for equipment that doesn't function according to design specifications. It describes the fundamentals of over 30 processes, types of equipment available, vendors, and common problems encountered in operations with hazardous waste.

Author: Ajay Kumar Ray
Publisher: Elsevier
ISBN: 0081010974
Category : Technology & Engineering
Languages : en
Pages : 860

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Book Description
Coulson and Richardson's Chemical Engineering: Volume 2B, Separation Processes, Sixth Edition, covers distillation and gas absorption, illustrating applications of the fundamental principles of mass transfer. Several techniques, including adsorption, ion exchange, chromatographic membrane separations and process intensification are comprehensively covered and explored. Presents content converted from textbooks into fully revised reference material Provides content that ranges from foundational to technical Includes new additions, such as emerging applications, numerical methods, and computational tools