Chemistry: natural resins or derivatives; peptides or proteins; – Lignins or derivatives – Aldehyde – ketone or ozone reacted with a lignin or lignin...
Patent
1985-10-21
1988-01-26
Nielsen, Earl
Chemistry: natural resins or derivatives; peptides or proteins;
Lignins or derivatives
Aldehyde, ketone or ozone reacted with a lignin or lignin...
C07G 100
Patent
active
047217782
ABSTRACT:
A method of producing ammonium salts of sulfomethylated lignins suited for use as dyestuff and coal-water slurry additives comprisng of the steps of ionizing the phenol component of a lignin material by-product of the black liquor of a kraft paper-making process in an alkaline liquid medium, methylolating the lignin material, lowering the pH of the liquid medium to an acid pH to precipitate the methylolated lignin material, washing the precipitated lignin material with water to remove inorganic salts and residual reactants therefrom, and sulfonating the washed, purified methylolated lignin material with an ammonium of a sulphur-oxygen containing compound in a liquid medium.
The washed, purified methylolated lignin material is preferably sulfonated at an acid pH level to minimize the production of electrolytes when the lignin is to be used for dyeing at low pH. Lignin products produced by the method, as well as dye and coal-water slurry compositions containing such products are also disclosed.
REFERENCES:
patent: 2525433 (1950-10-01), Voet
patent: 2680113 (1954-06-01), Adler et al.
patent: 2690973 (1954-10-01), Voet
patent: 3094515 (1963-06-01), Keirstead et al.
patent: 3156520 (1964-11-01), Blaisdell
patent: 3503762 (1970-03-01), Remer
patent: 3726850 (1973-04-01), Detroit
patent: 3769272 (1973-10-01), Hintz
patent: 3841887 (1974-10-01), Falkehag et al.
patent: 4001202 (1977-01-01), Dilling et al.
patent: 4047567 (1977-09-01), Childs et al.
patent: 4131564 (1978-12-01), Dilling
patent: 4184845 (1980-01-01), Lin
patent: 4308203 (1981-12-01), Lin
patent: 4355996 (1982-10-01), Dilling et al.
patent: 4465495 (1984-08-01), Scheffee
patent: 4521336 (1985-06-01), Dilling
patent: 4546173 (1985-10-01), Dilling
patent: 4551151 (1985-11-01), Dilling
patent: 4590262 (1986-05-01), Dilling
McDaniel Terry B.
Nielsen Earl
Schmalz Richard L.
Westvaco Corporation
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