C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
134/55
C04B 24/18 (2006.01) C04B 33/18 (2006.01) C08H 6/00 (2010.01)
Patent
CA 1141620
ABSTRACT OF THE DISCLOSURE A lignin product for dispersing cement and other finely divided mineral materials, such as clays and equivalent, and for plasticizing their water mixtures. The product is large-molecular such that at least 40 per cent of the material consists of molecules whose molecular weight is higher than 10,000. The sulfonation degree of said lignin product is lower than 0.4. The product is obtained from a cellulose cooking to which have been added catalysts preventing the splitting and dissolution of carbohydrates, such as amines, quinone and/or antraquinone derivatives or equivalent, in order to stabilize the cellulose and the hemicellulose during the cooking. The lingin product has been isolated from the spent liquor by using ultrafiltration, and/or complementary ion exchange.
363953
Flowcon Oy
Kirby Eades Gale Baker
LandOfFree
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