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  • 1
    Electronic Resource
    Electronic Resource
    Organomineral sorbents based on clinoptilolite-containing tuffs (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 1462-1465 
    Details
    ISSN: 1573-9171
    Keywords: zeolites, clinoptilolite-containing tuff, organomineral sorbent ; anion-exchange properties, ion-exchange capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A practically nonswelling sorbent with anion-exchange properties based on clinoptilolite-containing tuffs and polyhexamethyleneguanidine has been obtained. Its total anion-exchange capacity has been studied as a function of the ratio of the modifier and cross-linker concentrations, the deposit of the clinoptilolite-containing tuff, and pretreatment of its surface. The anion-exchange capacity of the sorbents reaches 0.22 meq. mL−1. The conditions for the synthesis of the sorbent have been chosen, and the elemental composition of the samples obtained has been determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697126
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Organomineral sorbents based on clinoptilolite-containing tuffs (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 1466-1468 
    Details
    ISSN: 1573-9171
    Keywords: clinoptilolite-containing tuff, organomineral sorbent ; “sorption-regeneration” cycle ; anion-exchange properties, selectivity coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The anion-exchange properties of a new organomineral sorbent obtained by modification of clinoptilolite-containing tuffs by polyhexamethyleneguanidine have been studied after different periods of storage (time after synthesis) and numbers of “sorption-regeneration” cycles. The sorbent can be used as a cation- and an anion-exchanger simultaneously. Selectivity coefficients (exchange constants) for F−, SO4 2−, and HPO4 2− ionsvs. Cl− ions on modified clinoptilolite-containing tuffs have been determined. The modification improves the mechanical properties of clinoptilolite tuffs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697127
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Preparation of fibrous ion-exchangers containing guanidine groups (1991)
    Springer
    Fibre chemistry 23 (1991), S. 29-33 
    Details
    ISSN: 1573-8493
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Conclusions -- The reaction of guanidine with grafted polyglysodylmethacrylate has been investigated. Basic kinetic parameters of the process have been determined. -- Fibrous chemisorbents have been prepared based on graft PCA-PGMA or Cell-PGMA copolymers which have been aminated with guanidine; the content of amino nitrogen was up to 2% by wt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00558104
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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