Continuous polypropylene wax production process

A polypropylene wax and production process technology, applied in the field of polypropylene wax, can solve the problems of high viscosity of polypropylene wax, affecting product quality, deterioration of heat transfer state, etc., shortening the reaction period, avoiding wall sticking and carbonization, and preventing carbides The effect of falling into the product

Active Publication Date: 2018-05-04
淄博市临淄齐泉工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor mixing of polypropylene in the extruder, this method is likely to cause deterioration of the heat transfer state. In order to meet the heat required for cracking, the reaction temperature must be increased, resulting in a decrease in yield, and it is prone to sticking to the wall and carbonization, which seriously affects product quality.
The third kind of stirred tank thermal cracking method is the method commonly used in China at present, but this method is difficult to stir due to the high viscosity of polypropylene wax in the initial stage of reaction, resulting in uneven temperature, and the melt adheres to the stirring and kettle wall The upper part is overheated and carbonized, and the carbides fall into the product and affect the product quality

Method used

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  • Continuous polypropylene wax production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put 300kg of polypropylene wax raw meal into the cracking kettle 1 every 30 minutes; the polypropylene wax raw meal enters the cracking kettle 1 from the polypropylene feed port 5, and the cracking kettle 1 starts to heat up intermittently and rises to 375°C;

[0028] 2) The low fraction is discharged through the extraction pipe on the cracking kettle 1, condensed by the condenser 6, and extracted to the low fraction storage tank 7;

[0029] 3) The molten polypropylene wax is extracted from the polypropylene outlet to the buffer tank 2 for temporary storage; the buffer tank 2 controls the temperature of the stored polypropylene wax at 375°C through steam cooling or heating rod heating; the buffer tank 2 is equipped with a thermocouple And thermostat, automatically control the steam to cool down or the heating rod to heat up.

[0030] 4) The molten polypropylene wax in the buffer tank 2 is continuously sprayed and granulated by the atomizer 3, and then cooled and drie...

Embodiment 2

[0033] 1) Put 270kg of polypropylene wax raw meal into the cracking kettle 1 every 28 minutes; the polypropylene wax raw meal enters the cracking kettle 1 from the polypropylene feed port 5, and the cracking kettle 1 starts to heat up intermittently and rises to 378°C;

[0034] 2) The low fraction is discharged through the extraction pipe on the cracking kettle 1, condensed by the condenser 6, and extracted to the low fraction storage tank 7;

[0035] 3) The melted polypropylene wax is extracted from the polypropylene outlet to the buffer tank 2 for temporary storage; the buffer tank 2 controls the temperature of the stored polypropylene wax at 378°C through steam cooling or heating rod heating; the buffer tank 2 is equipped with a thermocouple And thermostat, automatically control the steam to cool down or the heating rod to heat up.

[0036] 4) The molten polypropylene wax in the buffer tank 2 is continuously sprayed and granulated by the atomizer 3, and then cooled and drie...

Embodiment 3

[0039] 1) Put 320kg of polypropylene wax raw meal into the cracking kettle 1 every 32 minutes; the polypropylene wax raw meal enters the cracking kettle 1 from the polypropylene feed port 5, and the cracking kettle 1 starts to heat up intermittently and rises to 372°C;

[0040] 2) The low fraction is discharged through the extraction pipe on the cracking kettle 1, condensed by the condenser 6, and extracted to the low fraction storage tank 7;

[0041] 3) The molten polypropylene wax is extracted from the polypropylene outlet to the buffer tank 2 for temporary storage; the buffer tank 2 controls the temperature of the stored polypropylene wax at 372°C through steam cooling or heating rod heating; the buffer tank 2 is equipped with a thermocouple And thermostat, automatically control the steam to cool down or the heating rod to heat up.

[0042]4) The molten polypropylene wax in the buffer tank 2 is continuously sprayed and granulated by the atomizer 3, and then cooled and dried...

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Abstract

The invention discloses a continuous polypropylene wax production process, and belongs to the technical field of polypropylene wax. The process is characterized by comprising the following steps: distributing a hexagonal heating casing at the bottom of a used pyrolysis kettle (1), and feeding 250-350kg of raw polypropylene wax into the pyrolysis kettle (1) every 25-35 minutes; enabling the raw polypropylene wax to enter the pyrolysis kettle (1) from a polypropylene feeding hole (5), and intermittently raising the temperature of the pyrolysis kettle (1), and raising the temperature to 370-380 DEG C; continuously performing spray granulation on the molten polypropylene wax in a buffer tank (2) by an atomizer (3), and cooling and drying in a drying chamber (4) so as to obtain semi-finished polypropylene wax; grinding the semi-finished polypropylene wax, and screening, thereby obtaining the product. The continuous polypropylene wax production process disclosed by the invention has the advantages that the process has the characteristics of simplicity in operation, environment friendliness, up-to-standard discharge and high continuous degree, the obtained polypropylene wax does not contain any carbide, the product quality is high, and the like.

Description

technical field [0001] The invention discloses a continuous production process of polypropylene wax, which belongs to the technical field of polypropylene wax. Background technique [0002] At present, there are three methods for producing polypropylene wax. The first method is propylene-regulated polymerization, which is a conventional way to synthesize polypropylene wax. It can accurately control the molecular weight and has a narrow molecular weight distribution. However, this method requires high temperature and high pressure, and the process is complicated, so it is not suitable for small-scale production. The second reaction extrusion method, this method is convenient and quick to start up and change materials, and the temperature and reaction time are easy to control. However, due to the poor mixing of polypropylene in the extruder, this method is likely to cause deterioration of the heat transfer state. In order to meet the heat required for cracking, the reaction t...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F8/50
CPCC08F8/50C08F10/06
Inventor 孙强齐峰全齐锋国王玉侠
Owner 淄博市临淄齐泉工贸有限公司
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