Preparation method for titanium dioxide pigment

• Main Authors: YUAN XIUXIANG, XIAO YONGLI, GAN WENJUN, LIAO RONGHUA, YUAN LIJUN, JING JIANLIN, KE LIANGHUI
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2014
• Subjects: ADHESIVES; CHEMISTRY; DYES; IMPREGNATING OR COATING OF PAPER; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; POLISHES; PREPARATION OF CARBON BLACK; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

The invention provides a preparation method for a titanium dioxide pigment. The method comprises the following steps: a titanium dioxide powder material is subjected to pulping and dispersion processing, a titanium dioxide pulp material is obtained, the pH value of the pulp material is adjusted to 9.0-11.0, the pulp material is heated to 80-100 DEG C, a sodium silicate solution is added with an addition amount of being 1.0-5.0% of TiO2 mass in the pulp material in terms of SiO2, the temperature of the system is kept unchangeable, the pH value of the pulp material is adjusted to 3.0-5.0, slaking is carried out, the pH value of the pulp material is adjusted to 6.0-9.0, a solution containing phosphate radical compounds with an addition amount of being 1.0-4.0% of TiO2 mass in the pulp material in terms of P2O5 is added, at the same time, a solution containing aluminum compounds is added to keep the pH value of the pulp material being 5.0-9.0, the addition amount of the added solution containing aluminum compound