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Desanding and viscosity reducing agent for treating tank bottom sludge and its application

A viscosity reducer and tank treatment technology, which is applied in the field of fine chemicals, can solve problems such as poor effect and no effect, and achieve the effects of improving stability, reducing surface tension, and promoting sand removal and viscosity reduction

Active Publication Date: 2022-07-26
HUNAN BAILIN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned viscosity reducers are usually poor or not effective in treating tank bottom sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]Desanding viscosity reducer formulation: 7.7% polydimethylsiloxane, 0.45% MQ silicone resin, 0.45% hydrophobic fumed silica, 0.4% sodium hydroxide, 23% laurel by weight percentage Acid Polyoxyethylene-9, 10% Tristyryl Phenol Ethoxylate Phosphate, 17% Sodium Lauryl Sulfate, 2.8% Tween-80, 2.8% Cetearyl Ether -25, 1.4% Span-80, balance deionized water.

Embodiment 2

[0055] Desanding Viscosity Reducer Formulation: By weight, 12.1% polydimethylsiloxane, 0.26% MQ silicone, 0.39% hydrophobic fumed silica, 0.25% sodium hydroxide, 11% laurel Acid Polyoxyethylene-9, 6% Tristyryl Phenol Ethoxylate Phosphate, 30% Sodium Lauryl Sulfate, 2.4% Tween-80, 3.5% Cetearyl Ether -25, 2.1% Span-80, balance deionized water.

Embodiment 3

[0057] The chemical thermal cleaning process treats tank bottom sludge with an oil content of 27% and a solid content of 58%.

[0058] 1 kg tank bottom sludge, adds 4 kilograms of deionized water, after adding 2 g of dispersant sodium silicate, adds 2 g of sand removal and viscosity reducing agent in Example 1, is 50 ℃~70 ℃ at water temperature, stirring line When the speed is 1.5 m / s, the mud stays for 30 minutes and then the air floats to remove the slag until there is no oil scum scum.

[0059] Without adding the desanding and viscosity-reducing agent of Example 1, when no oil scum scum appeared in the air flotation, 274 g of sediment (absolutely dry) was washed out, and the oil content was 0.9%; When no oil scum scum appears in the air flotation, 511g of sediment (absolutely dry) is washed out, with an oil content of 0.7%, and the tailings meet the treatment standards.

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PUM

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Abstract

The invention relates to a desanding and viscosity reducing agent for treating oil sludge at the bottom of a tank and its application, which is composed of the following components: 1wt% to 20wt% of silicon paste; 10wt% to 40wt% of polyoxyethylene laurate; phenol polyoxyethylene ether phosphoric acid Ester 5wt%~30wt%; sodium lauryl sulfate 10wt%~30wt%; emulsifier 5wt%~10wt%; the balance is water; wherein, the silicone paste is polydimethylsiloxane, MQ silicone resin , a mixture of hydrophobic fumed silica and alkali. The invention reduces the surface tension of the oil sludge washing water at the bottom of the tank through the synergistic effect of surfactants, and promotes the desorption and desorption of petroleum, wax and colloid in the oil sludge particles from the mineral surface; Reduces foaming of foam-prone ingredients in formulations during hydrodynamic agitation. The formulation of the invention is novel and reasonable in composition, and when used with conventional dispersants such as sodium carbonate or sodium silicate, the invention exhibits excellent sand removal and viscosity reduction performance in the chemical thermal cleaning pretreatment section of oil sludge at the bottom of the tank.

Description

technical field [0001] The invention relates to a desanding and viscosity-reducing agent for treating oil sludge at the bottom of a tank and its application, in particular to a desanding and viscosity-reducing agent for treating oil sludge at the bottom of an oil storage tank used in a chemical thermal cleaning process, and belongs to the technical field of fine chemicals . Background technique [0002] During the storage and transportation of crude oil, a hazardous waste consisting of water, crude oil and solid particles deposited at the bottom of the oil tank is called tank bottom sludge due to natural sedimentation. On average, about 800,000 tons of oil storage tank bottom sludge is produced in my country every year, and it is increasing year by year. According to preliminary calculations, the residual crude oil in these tank bottom sludge accounts for about one thousandth of the annual crude oil production. Or located outside the scavenging area of ​​waterflooding and di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F101/32C02F101/20C02F101/38C02F101/34
CPCC02F11/00C02F2101/32
Inventor 杨兴昊周雄志罗宝林朱忠平唐琼华
Owner HUNAN BAILIN BIOLOGICAL TECH
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