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The editorial board of the "MSTU Vestnik" journal supports the «Open Access» policy which enables users to have free and unlimited access to scientific articles (to read, download, copy, distribute) in case the author is indicated when further quoted.

The academic periodical "Vestnik of MSTU" is available under the license Creative Commons «Attribution» (Attribution) 3.0 Unported (CC BY 3.0).

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Abstract. It has been established that from the sulphate-ammonium solutions – liquid wastes of tanning agents' technology – salting-out agent in the form of suspension with concentration of the sulphate ammonium – 1000-1200 g/l or in the form of strong-concentrated solution may be obtained. It has been revealed that the suspension could be used in the cycle at the stage of tanning agent crystallization instead of the crystalline reagent without important changes in its tanning properties. The technology for production of the tanning agent from the sphen concentrate is low-wasted.

Keywords: sphen, tanning agent, sulphate-ammonium solution, crystallization, utilization

Printed reference: // Vestnik of MSTU. 2011. V. 14, No 4. P. 774-777.

Electronic reference: // Vestnik of MSTU. 2011. V. 14, No 4. P. 774-777. URL: http://vestnik.mstu.edu.ru/v14_4_n46/articles/774_777_gerasim.pdf.

(In Russian, p.4, fig. 2, tables 3, ref 9, Adobe PDF)