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A kind of humic acid modified viscosity reducer and preparation method thereof

A technology of humic acid and viscosity reducer, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as differences in emulsification performance, achieve the effect of reducing shear stress, wide sources, and broad market prospects

Active Publication Date: 2021-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that humate can be used as an emulsifier for heavy oil and has a certain effect of emulsification and viscosity reduction. However, due to different raw materials and production processes, there are differences in emulsification performance.

Method used

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  • A kind of humic acid modified viscosity reducer and preparation method thereof
  • A kind of humic acid modified viscosity reducer and preparation method thereof
  • A kind of humic acid modified viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The synthesis steps of the humic acid modified molecule of the present embodiment are:

[0038] Add humic acid (HA, molecular weight range 600-1000), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), 4-dimethylaminopyridine into the reaction vessel (DMAP), anhydrous dichloromethane. The molar ratio is HA:EDC:DMAP=1:1.5:0.15, and the volume ratio is HA:anhydrous dichloromethane=1:14. At 40°C, after 72 hours of reaction, wash and separate phases, and the oil phase part is at 45°C Next, dichloromethane was removed by rotary evaporation to obtain a mixed product (HA) n , the molecular weight range is mainly concentrated in 2500-4000.

[0039] will get (HA) n As a macromolecular initiator, 0.3 g concentration of 6% DMC catalyst suspension was added to 15 g (HA) n , and carry out dehydration at 120°C and a reduced pressure of about 4KPa until the water content is lower than 0.02%. Then, about 1 g of ethylene oxide was metered in and a period of time was ...

Embodiment 2

[0042] The synthesis steps of the humic acid modified molecule of the present embodiment are:

[0043]Add humic acid (HA, molecular weight range 200-400), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), 4-dimethylaminopyridine into the reaction vessel (DMAP), anhydrous dichloromethane. The molar ratio is HA:EDC:DMAP=1:1.55:0.15, and the volume ratio is HA:anhydrous dichloromethane=1:16. At 40°C, wash with water and separate phases after reacting for 72 hours, and the oil phase part is at 45°C Next, dichloromethane was removed by rotary evaporation to obtain a mixed product (HA) n , the molecular weight range is mainly concentrated in 4000-6000.

[0044] will get (HA) n As a macromolecular initiator, 0.3 g concentration of 6% DMC catalyst suspension was added to 25 g (HA) n , and carry out dehydration at 120°C and a reduced pressure of about 4KPa until the water content is lower than 0.02%. Then, about 1 g of ethylene oxide was metered in and a period of...

Embodiment 3

[0047] The synthesis steps of the humic acid modified molecule of the present embodiment are:

[0048] Add humic acid (HA, molecular weight range 200-600), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), 4-dimethylaminopyridine into the reaction vessel (DMAP), anhydrous dichloromethane. The molar ratio is HA:EDC:DMAP=1:1.4:0.14, and the volume ratio is HA:anhydrous dichloromethane=1:20. At 42°C, wash with water and separate phases after 72 hours of reaction, and the oil phase part is at 45°C Next, dichloromethane was removed by rotary evaporation to obtain a mixed product (HA) n , the molecular weight range is mainly concentrated in 6000-10000.

[0049] will get (HA) n As a macromolecular initiator, 0.3 g concentration of 6% DMC catalyst suspension was added to 40 g (HA) n , and carry out dehydration at 130°C and a reduced pressure of about 4.5KPa until the water content is lower than 0.02%. Then, about 1.9 g of propylene oxide were metered in and a per...

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Abstract

The present invention disclosed a modified adhesive and preparation method of humic acid.The modified adhesive of the humidic acid has the structural unit shown in the embedded segment and type Ⅱ and type III shown in the type Ⅰ; of which, the formula Ⅰ is the humus acid shrinking, R is the aroma ring and / or the fat chain, and theN is 1‑100, the molecular weight of the duplicate unit in the type Ⅰ is 200‑1000; the duplication of the structural units shown in the type II and type III is 1‑100, and the structural unit and formula shown in the type Ⅱ Ⅱ ⅡThe duplicate ratio of the structural unit shown in the III is 1‑5: 1; the molecular weight of the modified adhesive of the humidic acid is 4000‑100,000.The sources of the present invention are widely sources. The structure and composition of the modified molecules can be adjusted according to the requirements of the use. It can effectively disperse thick oil, greatly reduce the thick oil viscosity, and apply to the fields of thick oil mining and infusion.

Description

technical field [0001] The invention belongs to the field of heavy oil exploitation, gathering and transportation, and more specifically relates to a humic acid modified viscosity reducer and a preparation method thereof. Background technique [0002] Humic acid (HA for short) is a type of organic substance accumulated by the decomposition and transformation of animal and plant remains through a series of chemical processes. It is mainly composed of carbon, hydrogen, oxygen, nitrogen and sulfur elements. Each structural unit of its molecule is composed of polycyclic aromatic nuclei and active functional groups, generally containing phenolic hydroxyl groups, alcoholic hydroxyl groups, carboxyl groups, enol groups, and sulfonic acid groups. , amino, quinone, methoxy and other groups. These active groups determine the acidity, hydrophilicity, ion exchange, complexation ability and high adsorption capacity of humic acid. Humic acid widely exists in soil, lakes, rivers, oceans,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C09K8/584
CPCC08G65/2624C09K8/584
Inventor 吴川张祖国徐晓慧苏建政张汝生王连生唐萍
Owner CHINA PETROLEUM & CHEM CORP
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