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Preparation method for producing refined composite polyethylene wax through multistage hydrogenation

A polyethylene wax and polyethylene technology, which is applied in the field of multi-stage hydrogenation to produce refined compound polyethylene wax, can solve problems such as affecting the quality of polyethylene wax, unsatisfactory polyethylene wax quality, changes in hydrogen environment, etc., and achieves hardness High, good product quality, simple process effect

Inactive Publication Date: 2017-11-07
扬州罗兰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the preparation process of polyethylene wax, it needs to be carried out under the condition of hydrogen gas. The quality of the polyethylene wax produced by the existing preparation process is not ideal, because the existing hydrogenation method is generally added at one time. Due to the change of various factors, it is very easy to cause the change of the hydrogen environment in the reactor, which will greatly affect the quality of the produced polyethylene wax, which needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Heat the material in the reactor to 150° to deliver hydrogen to the reactor, the hydrogen pressure is 12MPA, the volume ratio of hydrogen to raw materials is 190:1, continue to heat the reactor, and use the catalyst after the temperature rises to 180°, the amount of catalyst is the weight of raw materials At 220°C, the polyethylene wax product is produced by separating the oil-hydrogen mixture in the reactor through a catalyst.

[0013] The catalyst bed pressure is 12MPa, and the temperature is 180°C.

[0014] The hydrogen is transported in the following manner: first, hydrogen is input into the reactor, then the material is heated to 150° for the second time, and then the hydrogen is input for the third time when the catalyst is added after the temperature rises to 180°.

[0015] The proportion of hydrogen input in each stage is: V 1 :V 2 V 3 =1:9:1.

Embodiment 2

[0017] Heat the material in the reactor to 130° to deliver hydrogen to the reactor, the hydrogen pressure is 9MPA, the volume ratio of hydrogen to raw materials is 150:1, continue to heat the reactor, and use the catalyst after the temperature rises to 160°, the amount of catalyst is the weight of raw materials 0.5% , under the condition of 200 ℃, the polyethylene wax product is produced by separating the oil-hydrogen mixture in the reactor through a catalyst.

[0018] The catalyst bed pressure is 10MPa, and the temperature is 160°C.

[0019] The hydrogen is transported in the following manner: first, hydrogen is input into the reactor, then the added material is heated to 130° and the hydrogen is input for the second time, and the hydrogen is input for the third time when the catalyst is added after the temperature rises to 160°.

[0020] The proportion of hydrogen input in each stage is: V 1 :V 2 V 3 =1:8:1.5.

Embodiment 3

[0022] Heat the material in the reactor to 160° to deliver hydrogen to the reactor, the hydrogen pressure is 7MPA, the volume ratio of hydrogen to raw materials is 180:1, continue to heat the reactor, and use the catalyst after the temperature rises to 170°, the amount of catalyst is the weight of raw materials At 230°C, the polyethylene wax product is produced by separating the oil-hydrogen mixture in the reactor through a catalyst.

[0023] The catalyst bed pressure is 11MPa, and the temperature is 190°C.

[0024] The hydrogen is transported in the following manner: first, hydrogen is input into the reactor, then the material is heated to 160° and the hydrogen is input for the second time, and after the temperature rises to 170°, the hydrogen is input for the third time when the catalyst is added.

[0025] The proportion of hydrogen input in each stage is: V 1 :V 2 V 3 =1:8:2.

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PUM

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Abstract

The invention relates to a preparation method for producing refined composite polyethylene wax through multistage hydrogenation. The refined composite polyethylene wax is produced from polyethylene oligomer and coal-based Fischer-Tropsch crude wax (vacuum tower bottom oil) used as raw materials by use of a reduction catalyst with a multistage high-pressure hydrogenation technology, and desulfurization, nitrogen, oxygen and aromatic hydrocarbon saturation reactions are finished in one reactor. The multistage hydrogenation manner is adopted, hydrogen is added in the beginning, the hydrogen atmosphere exists in the reactor, and prehydrogenation is realized; then, a large amount of hydrogen is charged during the reaction, so that the reaction is performed in the presence of sufficient hydrogen, and the quality of the polyethylene wax product is guaranteed; finally, hydrogen is added again when the catalyst is added, the concentration of the hydrogen in the reactor is guaranteed, and the quality of the produced composite polyethylene wax is guaranteed finally in the three-stage hydrogenation manner.

Description

technical field [0001] The invention relates to a preparation method for producing refined composite polyethylene wax by multi-stage hydrogenation, and belongs to the technical field of preparation methods of composite polyethylene wax. Background technique [0002] In the preparation process of polyethylene wax, it needs to be carried out under the condition of hydrogen gas. The quality of the polyethylene wax produced by the existing preparation process is not ideal, because the existing hydrogenation method is generally added at one time. Due to the change of various factors, it is very easy to cause the change of the hydrogen environment in the reactor, which will greatly affect the quality of the produced polyethylene wax, which needs to be further improved. Contents of the invention [0003] Aiming at the above defects, the present invention aims to provide a method for producing refined composite polyethylene wax by multi-stage hydrogenation with reasonable process ...

Claims

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Application Information

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IPC IPC(8): C08F8/04
CPCC08F8/04C08F110/02
Inventor 朱建军罗琴
Owner 扬州罗兰新材料有限公司