Process for the production of lignin silicate and lignin silicoformate

The process for the production of sulfate lignin silicoformate and sulfate lignin silicate by the following steps:

• a. dry granular alkali metal metasilicate is slowly added to concentrated mineral acid in the ratio of 1 to 1 mols over a period fo 15 to 45 minutes, while agitating and keeping the temperature between 25.degree. to 85.degree. C;
• the chemical reaction is completed in 4 to 12 hours, thereby
• b. producing a white granular mixture of silicoformic acid, metasilicic acid and salt;
• then by
• c. washing with water and filtering, the salt is removed, thereby
• d. recovering silicoformic acid and metasilicic acid;
• then
• e. a residue of alkali metal carbonate is added to the silicoformic acid and metasilicic acid by adding an aqueous solution containing 10% to 25% alkali metal carbonate until the pH is 9 to 11, then filtering and air drying at 25.degree. to 85.degree. C;
• then
• f. mixing about 1 to 2 parts by weight of the mixture of silicoformic acid and metasilicic acid with about 3 parts by weight of a lignin compound, then heating the mixture to 50.degree. to 100.degree. C while agitating for 20 to 60 minutes, thereby
• g. producing sulfate lignin silicoformate and sulfate lignin silicate.