Method for processing chemical fibre titanium white from normal TiO2 by drying surface treatment

Abstract

The invention opened a dry surface treatment to make the chemical fiber titanium white using the TiO2 as the material. First to get the superfine titanium-white powder, next to disperse the powder and the surface active agent to gas-solid or gas-fog using the compression air loading system, last leading into the cyclone, so we can get the two phase titanium white powder. After separating the gas / solid and aging treatment, we get two product which diameter<1um and >=1um or <=2um respectively.

Description

technical field [0001] The invention belongs to the production field of chemical fiber titanium dioxide, in particular to a TiO 2 It is a method of processing raw materials into chemical fiber titanium dioxide through surface treatment. Background technique [0002] Titanium dioxide is an inorganic compound with the molecular formula TiO 2 . Titanium dioxide after surface treatment has good hiding power, refractive index and strong dispersibility in hydrophilic medium, so it is often used in the production of synthetic fibers and artificial fibers such as polyester, wet-process acrylic fibers and viscose fibers. It is widely used as a matting agent, and this surface-treated titanium dioxide is also called chemical fiber titanium dioxide. [0003] Many patent documents disclose chemical fiber titanium dioxide with different properties and preparation methods thereof, such as: 1. U.S. Patent US 350588A and German Patent DE 1060378A disclose a kind of phosphate or vinegar wi...

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Problems solved by technology

[0004] However, the chemical fiber titanium dioxide disclosed in the above-mentioned patent belongs to a class of chemical fiber titanium dioxide that is surface-treated with inorganic compounds. They are mainly used as matting agents for polyamide fibers (nylon), and generally have a water dispersibility of 95.5%), the application range of this chemical fiber titanium dioxide is limited

[0005] "Paint Industry" 1994 No. 4 P22-24 and 1995 No. 6 P11-13 reported the small test work of chemical fiber titanium dioxide and CN1271746 disclosed a surface treatment technology and production method of chemical fiber titanium dioxide, but they They all belong to wet surface treatment technology, using conventional wet processing techniques such as beating, grinding, dispersing, surface treatment, etc., there are high operating costs, many process parameters required to be controlled (making it difficult to guarantee product quality) and in the production process It is difficult to avoid shortcomings such as waste water discharge, so there is no industrial production report so far

According to our investigation, for a long time, all the processing plants in my country that use chemical fiber titanium dioxide raw materials to produce chemical fiber products rely almost entirely on imports of chemical fiber titanium dioxide raw materials, and are suitable for chemical fiber used in the processing of polyester, acrylic, polypropylene and other chemical fiber products. The production method of titanium dioxide has not been reported by foreign public materials so far. It can be seen that the above-mentioned chemical fiber titanium dioxide is still in the production of commercial secrets in the world.

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