Reproducible synthesis of all-silica CHA zeolite membranes in a homogeneous mother liquor

1986 ◽

Vol 51 (11) ◽

pp. 2481-2488

Author(s):

Benitto Mayrhofer ◽

Jana Mayrhoferová ◽

Lubomír Neužil ◽

Jaroslav Nývlt

Keyword(s):

Steady State ◽

Simple Model ◽

Mathematical Modelling ◽

Distribution Coefficient ◽

Mother Liquor ◽

Equilibrium Temperature ◽

Operating Conditions ◽

Limiting Case

The paper presents a simple model of recrystallization with countercurrent flows of the solution and the crystals being purified. The model assumes steady-state operating conditions, an equilibrium between the outlet streams of each stage, and the same equilibrium temperature and distribution coefficient for all stages. With these assumptions, the model provides the basis for analyzing the variation in the degree of purity as a function of the number of recrystallization stages. The analysis is facilitated by the use of a diagram constructed for the limiting case of perfect removal of the mother liquor from the crystals between the stages.

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Identification of novel erythromycin derivatives in mother liquor concentrates of Streptomyces erythraeus.

The Journal of Antibiotics ◽

10.7164/antibiotics.40.1 ◽

1987 ◽

Vol 40 (1) ◽

pp. 1-6 ◽

Cited By ~ 10

Author(s):

ISAAC O. KIBWAGE ◽

GERARD JANSSEN ◽

ROGER BUSSON ◽

Jos HOOGMARTENS ◽

HUBERT VANDERHAEGHE ◽

...

Keyword(s):

Mother Liquor

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Lactose mother liquor stream valorisation using electrodialysis

International Dairy Journal ◽

10.1016/j.idairyj.2021.105102 ◽

2021 ◽

pp. 105102

Author(s):

Arthur Merkel ◽

Matej Vavro ◽

Martin Ondrušek ◽

Daria Voropaeva ◽

Andrey Yaroslavtsev ◽

...

Keyword(s):

Mother Liquor

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Thin SAPO-34 zeolite membranes prepared by ball-milled seeds

Separation and Purification Technology ◽

10.1016/j.seppur.2021.118975 ◽

2021 ◽

pp. 118975

Author(s):

Danni Meng ◽

Xue Kong ◽

Xiaoxue Tang ◽

Wanying Guo ◽

Senlin Yang ◽

...

Keyword(s):

Zeolite Membranes

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Successive Crystallization of Organically Templated Uranyl Sulfates: Synthesis and Crystal Structures of [pyH](H3O)[(UO2)3(SO4)4(H2O)2], [pyH]2[(UO2)6(SO4)7(H2O)], and [pyH]2[(UO2)2(SO4)3]

ChemEngineering ◽

10.3390/chemengineering5010005 ◽

2021 ◽

Vol 5 (1) ◽

pp. 5

Author(s):

Evgeny V. Nazarchuk ◽

Dmitri O. Charkin ◽

Oleg I. Siidra

Keyword(s):

Hydrogen Bonds ◽

Crystal Structures ◽

Hydrothermal Treatment ◽

Mother Liquor ◽

Hydration Water ◽

Isothermal Evaporation ◽

Pyridinium Cations

Three new uranyl sulfates, [pyH](H3O)[(UO2)3(SO4)4(H2O)2] (1), [pyH]2[(UO2)6(SO4)7(H2O)] (2), and [pyH]2[(UO2)2(SO4)3] (3), were produced upon hydrothermal treatment and successive isothermal evaporation. 1 is monoclinic, P21/c, a = 14.3640(13), b = 10.0910(9), c = 18.8690(17) Å, β = 107.795(2), V = 2604.2(4) Å3, R1 = 0.038; 2 is orthorhombic, C2221, a = 10.1992(8), b = 18.5215(14), c = 22.7187(17) Å, V = 4291.7(6) Å3, R1 = 0.030; 3 is orthorhombic, Pccn, a = 9.7998(8), b = 10.0768(8), c = 20.947(2) Å, V = 2068.5(3) Å3, R1 = 0.055. In the structures of 1 and 2, the uranium polyhedra and SO4 tetrahedra share vertices to form ∞3[(UO2)3(SO4)4(H2O)2]2− and ∞3[(UO2)6(SO4)7(H2O)]2− frameworks featuring channels (12.2 × 6.7 Å in 1 and 12.9 × 6.5 Å in 2), which are occupied by pyridinium cations. The structure of 3 is comprised of ∞2[(UO2)2(SO4)3]2− layers linked by hydrogen bonds donated by pyridinium cations. The compounds 1–3 are formed during recrystallization processes, in which the evaporation of mother liquor leads to a stepwise loss of hydration water.

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