Unlock instant, AI-driven research and patent intelligence for your innovation.

A monodisperse hydrophobic silica defoamer for purification of high-sulfur natural gas

A technology of hydrophobic silica and hydrophilic silica, applied in foam dispersion/prevention, gas fuel, petroleum industry, etc., can solve the problems of short foam suppression time and low defoaming efficiency

Active Publication Date: 2017-08-22
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of low defoaming efficiency and short foam suppression time of the defoaming agent currently added to the amine desulfurization unit of high-sulfur natural gas, and provide a monodisperse hydrophobic silica defoamer for purification of high-sulfur natural gas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A monodisperse hydrophobic silica defoamer for purification of high-sulfur natural gas
  • A monodisperse hydrophobic silica defoamer for purification of high-sulfur natural gas
  • A monodisperse hydrophobic silica defoamer for purification of high-sulfur natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix 173g ethyl orthosilicate with dehydrated ethanol to form a 500ml solution to become solution T;

[0033] (2) Mix 146g ammonia water with 30g deionized water, and add absolute ethanol to 500ml to become solution A;

[0034](3) Weighing 2.5175g of commercially available silica sol seed solution with a median particle size of 31.5nm and a phase concentration of 2.61wt%, diluted to 200ml with absolute ethanol, added to a 1500ml reactor; and washed with 300ml of absolute ethanol to the reactor;

[0035] (4) Control the temperature of the reactor at 25±0.1° C., and control the rotation speed at 200 rpm, add solution A, and stir evenly. The solution T was divided into 10 batches and poured into the reaction kettle every 12 minutes to keep the reaction conditions stable. After all the reaction materials are added, the reaction is continued for 10 hours to obtain 50 g of monodisperse silica sol with a particle size of about 200 nm;

[0036] (5) The silica sol obtained...

Embodiment 2

[0042] (1) Mix 259g tetraethyl orthosilicate with absolute ethanol to form a 500ml solution to become solution T;

[0043] (2) Mix 198g ammonia water with 39.2423g deionized water, and add absolute ethanol to 500ml to become solution A;

[0044] (3) Weighing 8.2029g of a synthetic silica sol seed solution with a median particle size of 194nm and a phase concentration of 9.25wt%, diluted to 200ml with absolute ethanol, added to a 1500ml reactor; and washed with 300ml of absolute ethanol until the reaction in the kettle

[0045] (4) Control the temperature of the reactor at 25±0.1° C., and control the rotation speed at 200 rpm, add solution A, and stir evenly. The solution T was divided into 10 batches and poured into the reaction kettle every 12 minutes to keep the reaction conditions stable. After all the reaction materials are added, continue to react for 10 hours to obtain 75g of monodisperse silica sol with a particle size of about 900nm;

[0046] (5) The silica sol obta...

Embodiment 3

[0052] (1) Mix 259g tetraethyl orthosilicate with absolute ethanol to form a 500ml solution to become solution T;

[0053] (2) Mix 198g ammonia water with 39.2423g deionized water, and add absolute ethanol to 500ml to become solution A;

[0054] (3) Weighing 2.5175g of a synthetic silica sol seed solution with a median particle size of 194nm and a phase concentration of 9.25wt%, diluted to 200ml with absolute ethanol, added to a 1500ml reactor; and washed with 300ml of absolute ethanol until the reaction in the kettle

[0055] (4) Control the temperature of the reactor at 25±0.1° C., and control the rotation speed at 200 rpm, add solution A, and stir evenly. The solution T was divided into 10 batches and poured into the reaction kettle every 12 minutes to keep the reaction conditions stable. After all the reaction materials are added, continue to react for 10 hours to obtain 75g of monodisperse silica sol with a particle size of about 1500nm;

[0056] (5) Centrifuge the sil...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a monodisperse hydrophobic silicon dioxide defoamer for purifying high-sulfur natural gas and a preparation method thereof, belonging to the technical field of petrochemical industry. The defoamer is formed by emulsifying monodisperse hydrophobic silicon dioxide with a uniform particle size distribution and a deviation of less than 5% and a non-polar insoluble oil as a mobile carrier. The particle size of monodisperse hydrophobic silica particles can be adjusted according to the properties of the foam, and the surface of the particles can be modified by using different hydrophobizing agents, siloxane and polydimethylsiloxane, and controlling the amount of hydrophobizing agents to achieve optimal physical and chemical properties Customized, final monodisperse hydrophobic silica and mobile carrier, emulsifier, thickener, deionized water according to mass ratio (0.2~5.0):(10~25):(1~5):(1~5): (60-87.8) ratio for emulsification, so that the defoamer particles can obtain good defoaming and antifoaming effects.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a defoamer, in particular to a defoamer used in an organic alcohol amine solution of a high-sulfur natural gas purification device to quickly eliminate newly generated foam and suppress harmful foam for a long time. Background technique [0002] The purification process of sulfur-containing natural gas generally uses organic alcohol amine desulfurizers, such as methyldiethanolamine (MDEA), monoethanolamine (MEA), diethanolamine (DEA), etc. During the desulfurization of these alcohol amine solutions, after long-term circulation, they are affected by factors such as impurities carried by natural gas, corrosion pollution of equipment and pipelines, or chemical degradation by themselves, and are very prone to foaming. When bubbles appear, the production capacity of the purification device will drop sharply, and the quality of natural gas products cannot be guaranteed. In ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04C10L3/10
Inventor 周政商剑峰李文涛程振华刘元直林宏卿许艳赫戴海林
Owner CHINA PETROLEUM & CHEM CORP