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Nanwatkar, Shrikant
- Lignin Separation and Purification from Black Liquor Precipitate
Authors
1 Department of Chemical Engineering, Anuradha Engineering College, Chikhli, Buldhana, (M.S), IN
Source
International Journal of Engineering Research, Vol 4, No SP 2 (2015), Pagination: 95-98Abstract
The spent liquid after the pulping process in pulp mill, generally known as black liquor contains the degraded lignin and carbohydrate. The PH and the residual alkali of black liquor increased with the increase of total alkali used during the pulping process while the black liquor viscosity mainly depends on the dissolved lignin. The increase of alkali charge resulted higher dry solid yield due to the increase of both inorganic components and dissolved organic components. Analysis by Fourier transform infrared spectroscopy (FTIR) showed that the isolated lignin contain in each solvent, while gas chromatography(GC) analysis showed that black liquor composition. In this work, lignin precipitation was performed by the isolation of kraft black liquor at various process conditions, namely PH, temperature and different solvent and influences exerted by these parameters on the equilibrium of lignin increases with decreasing PH and temperature and with increasing ion strength of the black liquor used. The concentration of carbohydrates in lignin decreases with decreasing PH and that an increasing amount of lower molecular weight lignin is precipitated at a higher precipitation yield.Keywords
Black Liquor, Lignin, FTIR, Carbohydrate, Gas Chromatography.- Preparation of Fire Retardant Surface Using Lignin
Authors
1 Department of Chemical Engineering, Anuradha Engineering Collge, Chikhli, Buldhana (M.S), IN
Source
International Journal of Engineering Research, Vol 4, No SP 2 (2015), Pagination: 104-106Abstract
Fire retardant is prepared from urea, formaldehyde and lignin for the application of Urea formaldehyde resins was applied in same concentration by different method like drying. Retardancy of the treated wood was compared with in terms of temperature generation.. Beside the flammability results, temperature generation curve, cellulose-resin reaction mechanism, thermogravimetry (TG) and FTIR analysis of the control, treated wood were also compared and commented condensation polymerization at temperature 90-100ÂșC and PH range (7.5-8) was used for the reaction between urea and formaldehyde to produce polymeric adhesive. UF of resorcinol are used as bonding catalyst (an adhesion promoter) for UFlignin solid waste fibers system as curing binary system of adhesive for wood/wood laminate. Mechanical properties such as impact strength, bending test have been measured .The result shows that all these properties are increased when percentage of bonding catalyst material is increased for adhesive-fiber system at different arrangement for solid waste lignin use as a fire retardant.