Suspension used for flotation separation of waste plastic, preparing method thereof and applications of the suspension

A technology for waste plastics and suspensions, which is applied in the chemical industry to achieve the effect of bringing economic benefits and improving mechanical properties

Active Publication Date: 2016-02-24
GUANGDONG KINGFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems caused by the use of sodium chloride salt solution to clean flotation waste plastics in the above-mentione

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056]A suspension for flotation separation of waste plastics, comprising the following components in parts by weight: 5 parts of calcium carbonate heavy medium particles; 0.1 part of anionic surfactant sodium dodecylbenzenesulfonate; 0.1 part of lignin Calcium sulfonate; adding alkaline substance sodium hydroxide to adjust pH=8 of the suspension; 90 parts water; 4 parts carboxymethyl cellulose.

[0057] Its preparation method comprises the following steps:

[0058] a) Stir and disperse 5 parts of calcium carbonate heavy medium particles and 90 parts of water to obtain a premixed solution;

[0059] b) Add 0.1 part of anionic surfactant sodium dodecyl benzene sulfonate and 0.1 part of calcium lignosulfonate to the above premixed solution for ultrasonication and stirring to fully dissolve the surfactant to obtain a mixed solution;

[0060] c) Add the alkaline substance sodium hydroxide into the above mixed solution, stir and disperse it evenly, add 4 parts of carboxymethyl cell...

Embodiment 2

[0063] A suspension used for flotation separation of waste plastics, comprising the following components in parts by weight: 15 parts of calcium carbonate heavy medium particles; 5 parts of anionic surfactant sodium dodecylbenzenesulfonate; 5 parts of lignin Calcium sulfonate; add alkaline substance sodium hydroxide to adjust pH=12 of suspension; 73 parts of water;

[0064] Its preparation method comprises the following steps:

[0065] a) Stir and disperse 15 parts of calcium carbonate heavy medium particles and 73 parts of water to obtain a premixed solution;

[0066] b) Add 5 parts of anionic surfactant sodium dodecyl benzene sulfonate and 5 parts of calcium lignosulfonate to the above premixed solution for ultrasonication and stirring to fully dissolve the surfactant to obtain a mixed solution;

[0067] c) After adding the alkaline substance sodium hydroxide into the above mixed solution, stirring and dispersing again, a suspension with a density of 1.15 g / mL, pH=12, and n...

Embodiment 3

[0070] A suspension for flotation separation of waste plastics, comprising the following components in parts by weight: 35 parts of calcium carbonate heavy medium particles; 10 parts of anionic surfactant sodium dodecylbenzenesulfonate; 10 parts of lignin Calcium sulfonate; Add alkaline substance sodium hydroxide to adjust pH=14 of suspension; 42 parts of water;

[0071] Its preparation method comprises the following steps:

[0072] a) Stir and disperse 35 parts of calcium carbonate heavy medium particles and 42 parts of water to obtain a premixed solution;

[0073] b) Add 10 parts of anionic surfactant sodium dodecylbenzene sulfonate and 10 parts of calcium lignosulfonate to the above premixed solution for ultrasonication and stirring to fully dissolve the surfactant to obtain a mixed solution;

[0074] c) After adding the alkaline substance sodium hydroxide into the above mixed solution, stirring and dispersing again, a suspension with a density of 1.20 g / mL, pH=14, and no ...

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Abstract

A suspension used for flotation separation of waste plastic is disclosed. The suspension comprises following components by weight: 5-35 parts of dense-medium particles, 0.1-10 parts of a surfactant, 42-94 parts of water and 0-10 parts of an auxiliary agent. The density of the suspension is 1.01-1.31 g/mL. The pH value of the suspension is 4-14, preferably 6-12. The suspension is free of sedimentation after the suspension is allowed to stand for 10 min to 5 h. When the suspension is used for flotation separation of the waste plastic, the waste plastic with density smaller than the density of the suspension is in the upper layer of the suspension in a flotation process, and the waste plastic with density larger than the density of the suspension is in the lower layer of the suspension. A method of using the suspension for flotation separation of the waste plastic can replace an intra-industry manner in China that adopts a sodium chloride saline solution for flotation separation of the waste plastic. At least 85% of the dense-medium particles can be recycled and reutilized after flotation separation of the waste plastic is finished, and residue dense-medium particles of a small amount can act as a filler in subsequent modification of the plastic, thus improving mechanical performance of plastic products.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a suspension used for flotation separation of waste plastics and its preparation method and application. Background technique [0002] Dense medium particles are a kind of powder material widely used in industrial fields such as papermaking, plastic filler, coating, ink and cosmetics. For example, the invention patent CN101501147B discloses a suspension formed in mineral water using acrylic acid or methacrylic acid or a mixture thereof and a polymer of maleic anhydride monomer. This suspension can be mainly used in paper production and as a paper Coating paper with paint during production; invention patent CN103803625A discloses a nano barium sulfate sol and its preparation method, and its use as a polyester modifier. Dense media particles are widely used in industrial fields such as papermaking, plastic fillers, coatings, inks and cosmetics, but are rarely used in flo...

Claims

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Application Information

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IPC IPC(8): C08J11/06
CPCY02W30/62
Inventor 李计彪杨宝麟胡志华刘思杨
Owner GUANGDONG KINGFA TECH CO LTD
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