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High temperature resistant defoaming agent and application thereof in delay coking

A defoamer, high temperature resistant technology, applied in cracking, non-catalytic thermal cracking, foam dispersion/prevention, etc., can solve the problem of unsatisfactory use efficiency of delayed coking unit, avoid adverse effects, reduce dosage, save cost effect

Active Publication Date: 2015-07-22
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] The defoamer is prepared from the following raw materials: 15 parts of fluorine-containing polysiloxane with a viscosity of 30000-40000cst, 10 parts of modified nano-silica (50-2000nm), 10 parts of hyperbranched polyether, added Put it into 62 parts of kerosene preheated to 80±5°C, and disperse it with a high-speed shearing machine. 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 , continue to add 3 parts of vinyl polysilazane with an average molecular weight of 2500, and continue to stir for 1 hour under nitrogen atmosphere, filter the resulting mixture to remove heterogeneous impurities, and obtain the finished defoamer.

Embodiment 2

[0034] The defoamer is prepared from the following raw materials: 10 parts of fluorine-containing polysiloxane with a viscosity of 40000-50000cst, 10 parts of modified nano-silica (50-2000nm), 15 parts of hyperbranched polyether, added Put it into 60 parts of coked diesel oil preheated to 80±5°C, and disperse it with a high-speed shearing machine. 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 30°C under low-speed stirring Next, 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 3

[0036] The defoamer is prepared from the following raw materials: 10 parts of fluorine-containing polysiloxane with a viscosity of 30000-40000cst, 5 parts of modified nano-silica (50-2000nm), 15 parts of hyperbranched polyether, added Put it into 68 parts of white oil preheated to 80±5°C, and disperse it with a high-speed shearing machine. The dispersion process is carried out in a constant temperature water bath at 85°C; after dispersing for 2 hours, cool the above mixture to 30°C under low-speed stirring Next, continue to add 2 parts of vinyl polysilazane with an average molecular weight of 3000, and continue to stir for 1 hour under nitrogen atmosphere, and filter the resulting mixture to remove heterogeneous impurities to obtain the finished defoamer.

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Abstract

The invention relates to a high temperature resistant defoaming agent and application thereof in delay coking, the defoaming agent is prepared by compounding fluorine-containing polysiloxane, hyperbranched polyether, modified nano silica, vinyl-containing polysilazane and a solvent under certain conditions. A preparation method of the defoaming agent is as follows: dispersing required specifications of the fluorine-containing polysiloxane, the hyperbranched polyether and the modified nano silica 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-boiling-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-resistant defoamer 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 the rise of...

Claims

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Application Information

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