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Delay coking high temperature defoaming agent and its application

A defoamer, high temperature resistant technology, applied in the field of high temperature defoamer for delayed coking, high-efficiency multi-active component defoamer and its preparation field, can solve the problem of unsatisfactory use efficiency of delayed coking unit, and avoid defects Influence, reduced dosage, good geometric symmetry effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at a filling ratio of 50ppm, the defoaming efficiency can only reach 50-60%, which is not ideal for improving the efficiency of the delayed coking unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Described defoamer is formulated by following raw material: the viscosity is 10 6 10 parts of cSt (20°C) linear polydimethylsiloxane, 10 parts of glycerol dendritic polyether, 10 parts of higher carbon alcohol mixture (50% of 2-ethylhexanol and stearyl alcohol), added to In 65 parts of kerosene preheated to 65±5°C, disperse with a high-speed shearing machine, and the dispersion process is carried out in a constant temperature water bath at 85°C; after dispersing for 3 hours, cool the above mixture to below 30°C under low-speed stirring conditions, Continue to add 5 parts of vinyl polysilazane with an average molecular weight of 2500, and continue to stir for 1 hour under nitrogen atmosphere, and filter the obtained mixture to remove heterogeneous impurities to obtain the finished defoamer.

Embodiment 2

[0034] Described defoamer is formulated by following raw material: the viscosity is 10 6 15 parts of cSt (20°C) linear polydimethylsiloxane, 10 parts of glycerol dendritic polyether, 10 parts of higher carbon alcohol mixture (including 50% of 2-ethylhexanol and stearyl alcohol), added to 61.5 parts of kerosene preheated to 65±5°C were dispersed with a high-speed shearing machine, and the dispersion process was carried out in a constant temperature water bath at 85°C; after dispersing for 3 hours, the above mixture was cooled to below 30°C under low-speed stirring conditions, Continue to add 3.5 parts of vinyl polysilazane with an average molecular weight of 2500, and continue stirring for 1 hour under a nitrogen atmosphere, and filter the resulting mixture to remove heterogeneous impurities to obtain a finished defoamer.

Embodiment 3

[0036] Described defoamer is formulated by following raw material: the viscosity is 10 6 15 parts of cSt (20°C) linear polydimethylsiloxane, 5 parts of glycerol dendritic polyether, 15 parts of higher carbon alcohol mixture (50% each of 2-ethylhexanol and stearyl alcohol), added to In 60 parts of kerosene preheated to 65±5°C, disperse with a high-speed shearing machine, and the dispersion process is carried out in a constant temperature water bath at 85°C; after dispersing for 3.5 hours, cool the above mixture to below 30°C under low-speed stirring conditions, Continue to add 5 parts of vinyl polysilazane with an average molecular weight of 2500, and continue to stir for 1 hour under nitrogen atmosphere, and filter the obtained mixture to remove heterogeneous impurities to obtain the finished defoamer.

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Abstract

The invention relates to a delay coking high temperature defoaming agent and its application, the defoaming agent is prepared by compounding ultra-high-viscosity linear polydimethylsiloxane, glycerin-type dendritic polyether, high carbon alcohol, vinyl-containing polysilazane and a solvent under certain conditions. A preparation method of the defoaming agent is as follows: dispersing required specifications of the ultra-high-viscosity linear polydimethylsiloxane, the glycerin-type dendritic polyether and the high carbon alcohol in the solvent at a constant temperature of 60-100 DEG C, then cooling to room temperature, mixing, simultaneously adding the vinyl-containing polysilazane, and then filtering away non-homogeneous impurities to obtain the defoaming agent finished product. The efficient multi-active-component defoaming agent used in the delay coking process has good defoaming and anti-foaming properties at a high use temperature, also can maintain the high chemical stability, and is not easy to generate low-boilnig-point silicon-containing small molecules cyclized compounds, and the adverse influence of the defoaming agent on the subsequent processing process can be avoided.

Description

technical field [0001] The invention relates to a high-temperature defoamer for delayed coking and its application, in particular to a high-efficiency multi-active component defoamer used in a delayed coking process and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] Delayed coking, as a thermal processing process for deep cracking of inferior residual oil into light products and coke, is increasingly used in petroleum refining under the background of increasingly heavy and inferior crude oil quality, increasingly tight resources and rising oil prices. The position in the industry is even more prominent. In order to improve the processing efficiency of the coking unit, the operation mode of shortening the coking cycle and reducing the cycle ratio is usually adopted, so that the current production conditions of the coking tower have changed greatly compared with the past, such as the increase of fresh feed and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C10G9/00
Inventor 孙鹏王鑫刘纾言
Owner CHINA PETROLEUM & CHEM CORP
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