Article

Article title RESOURCE-SAVING TECHNOLOGY OF HYDROLYZED LIGNIN- BASEDHIGH-REACTIVE POLYMERSYNTHESIS
Authors A.G. Abramova, O.V. Popova, Z.Ch. Tarkoeva
Section SECTION IV. SAFETY IN TECHNOSPHERE
Month, Year 09, 2014 @en
Index UDC 541.13:547.992.3.001.73
DOI
Abstract Modified ligninscontaining multiple functional groups are used as high-reactive polymer and functional additive ingredients. Lignin is modifiedby chlorinating in 20% hydrochloric acid applying the electrochemical methodwith a graphite anode and bath maintenance.This method offers considerablesavings in hydrochloric acid and reduces negative environmental impact. The dynamics of chloride ion concentration in the chlorination electrolyte, chlorine and carboxy group content in the modified lignins is explored. It has been established that chloride reduction in half in electrolyte following thesubsequent syntheses does not result insignificant functional group reduction in chlorinated lignins, but requires electrolytic processincreasing. The electrolyte change is suggested the estimated amount of concentrated hydrochloric acidshould be added toa foul electrolyte followingeach synthesis. The electrolyte changecontributes to giving the chlorinated lignin characterized byrelatively stable functional group content and saving power.

Download PDF

Keywords Hydrolyzed lignin; chlorinated lignin; electrochemical synthesis; electrolyte change; resource husbandry.
References 1. Ligniny. Struktura, svoystva i reaktsii [Lignins. Structure, properties and reactions], Pod red. K.V. Sarkanena i K.N. Lyudviga. Moscow: Lesnaya promyshlennost', 1975, 632 p.
2. Shorygina N.N., Reznikov V.M., Elkin V.V. Reaktsionnaya sposobnost' lignin [Reactivity of lignin]. Moscow: Nauka, 1976, 368 p.
3. Khomenko A.P., Vorotilkin A.V., Vinokurov D.I. i dr. Ispol'zovanie khlorirovannogo lignina v kachestve protivozadirnoy prisadki v smazochnykh kompozitsiyakh dlya tyazhelona-gruzhennykh uzlov treniya [The use of chlorinated lignin as extreme pressure additives in lubricating compositions for highly loaded friction units]. Patent Rossii № 2439138. 2012. Byul. No. 1.
4. Aleksandrov A.A., Popova O.V. Modifitsirovannye ligniny v kachestve ingredientov kleevykh kompozitsiy [Modified lignins as ingredients of adhesive compositions], Khimicheskaya tekhnologiya [Chemical Technology], 2013, No. 9, pp. 536-541.
5. Popova O.V., Aleksandrov A.A., Serbinovskiy M.Yu. Modifitsirovannye ligniny v tekhnologii ionoobmennykh materialov [Modified lignins in the technology of ion-exchange materials], Ekologiya i promyshlennost' Rossii [Ecology and Industry of Russia], 2012, No. 10, pp. 15-17.
6. Smirnov V.A., Kovalenko E.I. Elektrokhimicheskoe okislenie i modifikatsiya ligninov [Electrochemical oxidation and modification of lignins], Elektrokhimiya [Electrochemistry], 1992, Vol. 28, No. 4, pp. 600-614.
7. Guben-Veyl'. Metody organicheskoy khimii. T. 2. Metody analiza [Methods of organic chemistry. Vol. 2. Methods of analysis]: Per. s nem. Moscow: Khimiya, 1975, 1032 p.
8. Zakis G.F. Funktsional'nyy analiz ligninov i ikh proizvodnykh [Functional analysis of lignins and their derivatives]. Riga: Zinatne, 1987, 230 p.
9. Kovalenko E.I., Smirnov V.A., Shalimov V.N. Elektrokhimicheskoe khlorirovanie gidroliznogo lignina [Electrochemical chlorination of hydrolytic lignin], Zhurnal prikladnoy khimii [Journal of Applied Chemistry], 1980, No. 6, pp. 1312-1317.
10. Rabinovich V.A., Khavin Z.Ya. Kratkiy spravochnik khimika [Quick reference chemist]. 2nd. ed. Moscow: Khimiya, 1978, 270 p.

Comments are closed.