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A kind of delayed coking defoamer and preparation method thereof

A technology of delayed coking and defoaming agent, applied in chemical instruments and methods, separation methods, cracking, etc., can solve the problems of low defoaming rate, poor thermal stability of defoaming agent, etc., and achieve small additive dosage and excellent foam suppression. and defoaming properties, the effect of increasing viscosity

Active Publication Date: 2021-08-06
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor thermal stability and low defoaming rate of the defoamer in the prior art, thereby providing a delayed coking defoamer and its preparation method

Method used

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  • A kind of delayed coking defoamer and preparation method thereof
  • A kind of delayed coking defoamer and preparation method thereof

Examples

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Comparison scheme
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Embodiment 1

[0038] This embodiment provides a delayed coking defoamer, which includes the following raw materials:

[0039] 30g terminal hydroxypropyl fluoropolysiloxane (average molecular weight M=1000), 5g high-viscosity polydimethylsiloxane (kinematic viscosity is 600mPa·s), 5g low-viscosity polydimethylsiloxane (kinematic Viscosity is 100mPa·s) and 60g gasoline.

[0040] A preparation method of a delayed coking defoamer, comprising the steps of:

[0041] 30g terminal hydroxypropyl fluorine-containing polysiloxane (average molecular weight M=1000), 5g high viscosity polydimethylsiloxane (kinematic viscosity is 600mPa·s), 5g low viscosity polydimethylsiloxane ( The kinematic viscosity is 100mPa·s) and 60g of gasoline are evenly mixed, stirred at 30°C for 4h to make it fully dispersed in gasoline, and the delayed coking defoamer is prepared after natural cooling.

Embodiment 2

[0043] This embodiment provides a delayed coking defoamer, which includes the following raw materials:

[0044] 35g terminal hydroxypropyl fluoropolysiloxane (average molecular weight M=1500), 6g high-viscosity polydimethylsiloxane (kinematic viscosity is 800mPa·s), 8g low-viscosity polydimethylsiloxane (kinematic Viscosity is 300mPa·s) and 45g diesel oil.

[0045] A preparation method of a delayed coking defoamer, comprising the steps of:

[0046] 35g terminal hydroxypropyl fluorine-containing polysiloxane (average molecular weight M=1500), 6g high viscosity polydimethylsiloxane (kinematic viscosity is 800mPa·s), 8g low viscosity polydimethylsiloxane ( The kinematic viscosity is 300mPa·s) and 45g of diesel oil are evenly mixed, stirred at 50°C for 3 hours to make it fully dispersed in the diesel oil, and the delayed coking defoamer is prepared after natural cooling.

Embodiment 3

[0048] This embodiment provides a delayed coking defoamer, which includes the following raw materials:

[0049] 45g terminal hydroxypropyl fluorine-containing polysiloxane (average molecular weight M=2500), 10g high-viscosity polydimethylsiloxane (kinematic viscosity is 1000mPa·s), 5g low-viscosity polydimethylsiloxane (kinematic Viscosity is 500mPa·s) and 40g mineral base oil.

[0050] A preparation method of a delayed coking defoamer, comprising the steps of:

[0051] 45g terminal hydroxypropyl fluorine-containing polysiloxane (average molecular weight M=2500), 10g high viscosity polydimethylsiloxane (kinematic viscosity is 1000mPa·s), 5g low viscosity polydimethylsiloxane ( The kinematic viscosity is 500mPa·s) and 40g of mineral base oil are mixed evenly, stirred at 40°C for 4 hours to make it fully dispersed in the mineral base oil, and after natural cooling, a delayed coking defoamer is prepared.

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Abstract

The invention discloses a delayed coking defoamer and a preparation method thereof. The delayed coking defoamer comprises the following raw materials in parts by weight: long-chain fluorine-containing polysiloxane, high-viscosity polydimethylsiloxane, low-viscosity polysiloxane Among them, the average molecular weight of long-chain fluorine-containing polysiloxane is 1000-2500, the kinematic viscosity of high-viscosity polydimethylsiloxane is 600-1000mPa·s, and the low-viscosity polydimethylsiloxane is 600-1000mPa·s. The kinematic viscosity of methylsiloxane is 100-500mPa·s. The delayed coking defoamer prepared by the invention not only has high temperature resistance, low silicon content and less usage, but also has excellent defoaming and antifoaming effects.

Description

technical field [0001] The invention relates to the field of defoamers, in particular to a delayed coking defoamer and a preparation method thereof. Background technique [0002] Delayed coking is an important residual oil processing technology in a refinery, which mainly improves the yield of light oil through deep processing of residual oil and heavy oil. As crude oil becomes heavier and worse, delayed coking is getting more and more attention from refineries. During the delayed coking process, because the raw material residue contains some surface active substances, the pyrolyzed oil and gas in the coke tower escapes from the partially cracked raw material, forming a stable foam layer on the upper part of the coke tower. , the foam layer gradually rises, seriously affecting the normal operation of the coke tower. For example, the material entrained by the foam enters the pipeline of the fractionation tower, causing coking, and even blockage of the pipeline in severe cas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04C10G9/00
CPCB01D19/0409C10G9/00
Inventor 蔡大妮赵素云倪雪梅
Owner SHENYANG SANJUKAITE CATALYST
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