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WATER FORUM 2016

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ARTICLES

Куваева З.И., Каранкевич Е.Г. , Качерская С.П.
Межфазное распределение L-гомосерина

М.С.Черевин, З.П.Зубрейчук, Л.А.Попова, Т.Г.Гулевич, В.А.Книжников
N-ТРИФТОРАЦЕТИЛ-β-АЛАНИН В СИНТЕЗЕ КАРНОЗИНА

V.I. Potkin, A.V.Kletskov, S.K.Petkevich, S.G.Pashkevich, V.V.Kazbanov, A.A.Denisov, V.A.Kulchitsky
Synthesis of water soluble isoxazol-3-yl(isothiazol-3-yl) carboxamides and ureas containing amino acid residues – potential anticancer agents

Potkin V.I., Petkevich S.K., Kurman P.V., Levkovskaya G.G., Ivashkevich L.S., Lyakhov A.S.
Bimolecular condensation of 1-(para-tolyl)- and 1-(biphenyl-4-yl)-3,4,4-trichloro-3-buten-1-ones to 2,3,4,6-substituted 4Н-pyrans

Fomich M. A., Kvach M. V., Navakouski M. J., Weise C., Baranovsky A. V., Korshun V. A., Shmanai V. V.
Azide Phosphoramidite in Direct Synthesis of Azide-Modified Oligonucleotides

Fibrous ion exchangers Fiban for fine air cleaning in “cleanroom” technology.

A distinguishing feature of Fibanâ is high efficiency in air purification from acid (HCl, HF, SO₂, , CH₃COOH, HCOOH) and basic (NH₃, N₂H₄, amines) pollutions. They have provided a basis for creation and manufacturing in Belarus of industrial filters for fine air cleaning systems of airflow capacity (rate) up to 30000 m³ per hour. These filters feature both low filter pressure drop and high efficiency.

Exceptionally high speed of exchange and sorption processes on Fibanâ ion exchangers allows them to be applied in thin filtering layers (of 2-3 to 20 mm depending on the filter design).

Since nineties of the last century Fiban materials have been used in gas-dust respirators production. Since recent time Fiban materials have been tested and applied for fine air filtration systems in some European industries of clean rooms for microelectronic, pharmaceutical and food industries.

 

The Fiban advantages for clean rooms application include:

• great variety of ion-exchangers including different functional groups, especially strong acid and strong basic;
• high hydrophilicity;
• high exchange capacity;
• availability of conversion to different non-woven materials of the required width;
• capability of further processing of non-woven into crimped materials to enlarge filter surface area;
• high efficiency of purification of gases containing acid and basic pollutions of micro concentrations under humidity of a wide range.

The given below list includes descriptions and data of Fiban materials have been used in cleanroom practice as well as not tested for this purpose yet produced by coproduction of IFOCH NASB and UP "UNITECHPROM BSU"».

№	Fiban model	Functional group	Ionic form	Static exchange capacity, mg-eq/g	Pollutions	Relat. humi dity, %	Dynamic capacity  by NH3  C/C0=0,1, mg-eq/g  for C0=		Dynamic capacity   by SO2  C/C0=0,1, mg-eq/g  for C0=			Textile form
							2,5	15,0	2,8	10,5	37,0
1	K-1	-SO3-	H+	3,0	NH3, N2H4, amines	7,5-90	2,4	2,6	-	-	-	needle-punched non-woven fabric
2	A-5	-N(R1)2	bases	~4,0	SO2, HCl, HF, organic acids	38-90	-	-	2,2	3,0	4,4	needle-punched non-woven fabric
3	A-6	-N+(R1)2   ½   R2   -N(R1)2	HCO3-, CO32-     bases	≤2,0       1,0	SO2, HCl, HF, organic acids	43-90	-	-	2,2	2,3	3,1	needle-punched non-woven fabric
4	A-6(N) mixture of A-5 and A-6	-N+(R1)2   ½   R2   -N(R1)2	HCO3-, CO32-     bases	≤1,0       ~2,0	SO2, HCl, HF, organic acids	38-90	-	-	2,2	2,7	3,7	needle-punched non-woven fabric
Experimental samples
5	A-7	-N+(R1)2   ½   R3   -N(R1)2	HCO3-, CO32-     bases	≤2,0       1,0	SO2, HCl, HF, organic acids	35-90	-	-	-	-	-	staple
6	AK-22i	OH      ½ О=P-OH      ½     OH	H+	≥5,0	NH3, N2H4, amines	43-70	-	2,3-5,0	-	-	-	non-woven fiber, width 25-30cm

• Concentrations of fixed impurities 2-50 mg per m³.
• Air flow rates 0,08-0,09 m per second.
• Relative himidity 7-90%.