Saturday, May 9, 2009

LIGNIN PRECIPITATION

Available Method For Lignin Precipitation

1.Kraft Lignin−Poly(DADMAC) Precipitation

This method is developed by "Raymond E. Lappan, Robert Pelton,* Ian McLennan, Jasmin Patry, and Andrew N. Hrymak Department of Chemical Engineering, McMaster Centre for Pulp and Paper Research, McMaster University, Hamilton, Ontario, Canada L8S 4L7"

Main Abstract:

The precipitation of kraft lignin with poly(diallyldimethylammonium chloride), poly(DADMAC), was characterized as a function of pH. At a mass mixing ratio of poly(DADMAC) to lignin of 0.53 at pH 12.6, approximately 80% of the added lignin was removed, whereas the precipitate contained less than 35% of the added poly(DADMAC). Lignin precipitated with as much as 75% of the charges not associated with poly(DADMAC). Lower pH solutions required less poly(DADMAC) for lignin precipitation. Colloidal complex formation was measured as a function of time by dynamic light scattering, and the results could be fitted by a diffusion-controlled aggregation model.

Properties of Poly(DAMAC):

Water soluble cationic polymer. High cationic charge density in ready to use aqueous solution form. Material is quaternized cyclic amine supplied as the quarternary amine chloride.

The ability to modify surfaces and provide cationic character allows the user to selectively attract negatively charged functional groups to the coated surface or to the dissolved water soluble cationic polymers.

This feature is useful in the following types of applications:

# heavy metal removal by chelation
# promotion of precipitation or flocculation of dissolved solids
# imparting antistatic properties
# adding anti-microbial character
# binding of dyes or inks
# anionic pigment binding
# decolorizing agent
# binding to aldehydes
# corrosion inhibition on metal surfaces
# polymer bridging to link functionalized polymer systems

Mwt: 40,000

COST/PRICE/INDUSTRIES :

A. Poly sciences Inc.
U.S. Corporate Headquarters
Polysciences, Inc.
400 Valley Road
Warrington, Pennsylvania USA

URL: http://www.polysciences.com/

Catalog No. : 24830-100

Packaging Size : 100gm

Price In Asia : $77.10

B. SIGMA ALDRICH

Catalog No. : 409014

Price In India :

Quantity--------Price Rs.(INR)
25ML----------1810.00
1L--------------2023.00
4L--------------4167.00

1 comment:

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