Barium sulfate suspension system with uniform dispersion and low viscosity, and preparation method and application thereof

A uniformly dispersed, barium sulfate technology, applied in chemical instruments and methods, drilling compositions, coatings, etc., can solve the problems of particle agglomeration, uneven dispersion, inability to stabilize the viscosity of the dispersion system, and achieve good rheological properties. Effect

Active Publication Date: 2020-12-01
SHANDONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

When barium sulfate particles are directly added to coatings and other substrates, they are easy to agglomerate and cause uneven dispersion. Therefore, in the prior art, it is generally prepared as a dispersion system and then added
[0003] At present, barium sulfate particles are usually dispersed with water as a solvent. Since barium sulfate particles have a hydrophilic surface, when preparing a suspension in a non-polar medium, problems such as particle agglomeration, unstable dispersion and increased system viscosity are prone to occur, especially is at high solid concentration, which limits its application

Method used

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  • Barium sulfate suspension system with uniform dispersion and low viscosity, and preparation method and application thereof
  • Barium sulfate suspension system with uniform dispersion and low viscosity, and preparation method and application thereof

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[0028] The present invention also provides a method for preparing the uniformly dispersed and low-viscosity barium sulfate suspension system described in the above technical solution, comprising: adding barium sulfate particles after mixing the fatty alcohol polyoxyethylene ether carboxylic acid and the oil phase, and then ultrasonicating to obtain sulfuric acid Barium Suspension System.

[0029] The invention mixes the fatty alcohol polyoxyethylene ether carboxylic acid and the oil phase to obtain the oil solution.

[0030] In the present invention, the mixing of the fatty alcohol polyoxyethylene ether carboxylic acid and the oil phase is preferably carried out under stirring conditions; the stirring is preferably magnetic stirring, and the stirring speed is preferably 400-1000r / min, more preferably 500~800r / min, most preferably 600r / min; the time of the stirring is preferably 5~25min, more preferably 10~20min, most preferably 15min; the temperature of the stirring is prefera...

Embodiment 1

[0038]In terms of parts by mass, the barium sulfate suspension system consists of: 0.01 part of fatty alcohol polyoxyethylene ether carboxylic acid (alkyl chain carbon number 3, oxirane number 3), 5 parts of barium sulfate particles (barium sulfate particle density 4.5g / cm, particle size 0.5μm), gas-to-oil (185V) 94.99 parts.

[0039] The preparation method of the barium sulfate suspension system in the present embodiment is: add 0.01 part of fatty alcohol polyoxyethylene ether carboxylic acid (alkyl chain carbon number 3, oxirane number 3) to 94.99 parts of gas oil, 25 ℃, 400r / min magnetic stirring for 5min, add 5 parts of barium sulfate particles, 25°C, 400r / min magnetic stirring for 5min, then ultrasonic, ultrasonic power 400W, ultrasonic time is 20 cycles (ultrasonic 5s, interval 5s).

Embodiment 2

[0041] In terms of parts by mass, the barium sulfate suspension system consists of: 0.1 part of fatty alcohol polyoxyethylene ether carboxylic acid (alkyl chain carbon number 7, ethylene oxide number 7), 15 parts of barium sulfate particles (barium sulfate particle density 4.5g / cm, particle size 0.5μm), gas-to-oil (185V) 84.9 parts.

[0042] The preparation method of the barium sulfate suspension system in the present embodiment is: add 0.1 part of fatty alcohol polyoxyethylene ether carboxylic acid (alkyl chain carbon number 7, oxirane number 7) to 84.9 parts of gas oil, 25 ℃, 500r / min magnetic stirring for 10min, add 15 parts of barium sulfate particles, 25°C, 500r / min magnetic stirring for 10min, then ultrasonic, ultrasonic power 500W, ultrasonic time is 40 cycles (ultrasonic 5s, interval 5s).

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Abstract

The invention provides a barium sulfate suspension system with uniform dispersion and low viscosity, and a preparation method and application thereof, and belongs to the field of solid particle suspension dispersion. The barium sulfate suspension system provided by the invention comprises 0.01-0.8 part of fatty alcohol polyoxyethylene ether carboxylic acid, 5-60 parts of barium sulfate particles and 39.2-94.99 parts of an oil phase. The fatty alcohol polyoxyethylene ether carboxylic acid can enable barium sulfate particles to maintain good dispersion stability in an oil phase, the use amount of the fatty alcohol polyoxyethylene ether carboxylic acid can be controlled to enable the system viscosity to be maintained within a low range when the concentration of the barium sulfate particles ishigh, and the problems of particle aggregation, system viscosity increase and the like when the barium sulfate particles are dispersed in the oil phase are avoided. Experimental results show that according to the barium sulfate suspension system provided by the invention, when the mass content of barium sulfate particles is 5-60% and the shearing rate is 100 s<-1>, the system viscosity is 20 mPa*s or below, and the barium sulfate suspension system has good rheological property and is uniform in barium sulfate particle dispersion.

Description

technical field [0001] The invention relates to the field of suspension and dispersion of solid particles, in particular to a uniformly dispersed and low-viscosity barium sulfate suspension system and a preparation method and application thereof. Background technique [0002] Solid particles are widely used in oil drilling, coatings, ceramics and other fields due to their high hardness, high density and high stability. At present, the widely used particles mainly include ceramic particles and insoluble salt particles, such as alumina and sulfuric acid. barium. When the barium sulfate particles are directly added to the matrix such as coatings, they are easy to agglomerate and cause uneven dispersion. Therefore, in the prior art, it is generally prepared as a dispersion system before adding. [0003] At present, barium sulfate particles are usually dispersed with water as a solvent. Since barium sulfate particles have a hydrophilic surface, when preparing a suspension in a n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/32C09D7/65C09D7/61
CPCC09K8/03C09K8/32C09D7/61C09D7/65
Inventor 孙德军冯宗涛狄雯雯李坤成许昊苒
Owner SHANDONG UNIV
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