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Titanium dioxide delustering agent for relieving scaling of prepolymerization tower

A titanium dioxide and matting agent technology, applied in chemical instruments and methods, dyeing organosilicon compound treatment, inorganic pigment treatment and other directions, can solve the problems of poor particle compactness, fouling of polymerization towers, and easy condensation, etc. Anti-fouling effect

Pending Publication Date: 2020-05-08
CHANGLE LIHENG POLYAMIDE TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current coating methods generally include inorganic coating, organic coating and hybrid coating. Hybrid coating refers to the use of organic coating on the basis of inorganic coating, although it can make TiO 2 It has good performance and better dispersion at the same time, but in the actual production of nylon polymerization process, TiO under the existing coating method 2 The particle density is poor, and it is easy to condense under the temperature, pressure, acid, amine and other environmental conditions in the pre-polymerization tower, resulting in fouling in the polymerization tower

Method used

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  • Titanium dioxide delustering agent for relieving scaling of prepolymerization tower
  • Titanium dioxide delustering agent for relieving scaling of prepolymerization tower
  • Titanium dioxide delustering agent for relieving scaling of prepolymerization tower

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Embodiment 1

[0024] see figure 1 As shown, a titanium dioxide matting agent for alleviating fouling of the prepolymerization tower of the present invention includes titanium dioxide particles and a composite layer coated on the outside of the titanium dioxide particles, and the composite layer is silicon dioxide layer 1, manganese Ionic layer 2, aluminum oxide layer 3 and silicone polymer coating 4.

[0025] In the present invention, silicon dioxide is coated on the innermost layer in order to avoid SiO 2 Free out, and covered in TiO 2 The higher the silicon content, the free SiO 2 more and more. In the extraction tower, when the monomer of nylon chips is extracted, silicon ions are dissolved in the extraction water, and then during the recovery and treatment of the extraction water, that is, scaling and pipeline blockage occur during the three-effect evaporation concentration extraction water section, which is low. Scaling of the element separation tank caused major abnormalities.

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Abstract

The invention relates to a TiO2 delustering agent, in particular to a titanium dioxide delustering agent for relieving scaling of a prepolymerization tower. The titanium dioxide delustering agent comprises titanium dioxide particles and a composite layer coating the titanium dioxide particles, and the composite layer sequentially comprises an inorganic silicon compound layer, a metal compound layer and an organic polymer coating layer from inside to outside. The titanium dioxide delustering agent for relieving scaling of the prepolymerization tower has good compactness, can improve the scalingphenomenon and is good in dispersity. The scaling phenomenon in the polymerization tower can be relieved.

Description

technical field [0001] The present invention relates to a kind of TiO 2 A matting agent, more specifically relates to a titanium dioxide matting agent for alleviating fouling of a pre-polymerization tower. Background technique [0002] With the continuous development of the polyester industry around the world, the competition for polyamide product development is becoming increasingly fierce. In order to eliminate the luster of polyamide fibers, it is often used to add TiO to the melt 2 Matting agent. [0003] In the process of producing polymerized nylon chips, add an appropriate amount of TiO 2 It mainly plays the role of matting, making the slices look opaque. After spinning and weaving into cloth downstream, it has the effect of shading on the cloth surface. However TiO 2 The compound itself has the phenomenon of particle coagulation and molecular agglomeration. In order to avoid TiO 2 Particle coagulation phenomenon caused by potential difference and prevention of ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/12
CPCC09C1/3692C01P2006/22C01P2006/60
Inventor 黄文国陈敏夏湘
Owner CHANGLE LIHENG POLYAMIDE TECH
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