Process for industrialized continuous removal of alkaline impurities in SEBS rubber liquid or SBS rubber liquid

A glue and process technology, applied in the field of polymer SEBS or SBS material preparation, can solve the problems of long residence time requirement, difficult removal of lower fatty alcohol, low catalyst removal efficiency, etc., and achieves good removal effect, Increased exposure, continuous and efficient removal

Active Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] U.S. Patent 3,780,138 discloses a method for removing residual metal catalysts, which uses oxidant and dilute citric acid aqueous solution and lower aliphatic alcohol to extract metal ions in polymers. This method requires the use of a large amount of extractant, and the extraction time is long. difficult phase separation
The treatment process is complicated, the process is long, and it is easy to cause environmental pollution. In addition, the recovered solvent contains lower aliphatic alcohols that are difficult to remove. The latter will become a chain terminator in the polymerization reaction, which is not good for the polymerization reaction.
[0005] Chinese patent CN1027172C discloses a method for removing residual catalyst from unsaturated polymer hydrogenated glue, which uses oxidant and dibasic acid to remove hydrogenation catalyst, and the solvent used for precipitant is polyalkylene glycol A mixture of eth

Method used

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  • Process for industrialized continuous removal of alkaline impurities in SEBS rubber liquid or SBS rubber liquid
  • Process for industrialized continuous removal of alkaline impurities in SEBS rubber liquid or SBS rubber liquid
  • Process for industrialized continuous removal of alkaline impurities in SEBS rubber liquid or SBS rubber liquid

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Experimental program
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Embodiment 1

[0022] Continuously add deionized water and SEBS glue into the first pipeline type high-speed shearing emulsifier to fully shear and emulsify, control the amount of deionized water added to be 8% to 10% of the volume of SEBS glue, and the mixed solution and The continuously added tert-decanoic acid enters into the second pipeline type high-speed shearing emulsifier to fully shear and emulsify. The molar ratio of the carboxyl group of tert-decanoic acid to the lithium ion in the glue is 0.6-0.9:1, and the dispersed mixed solution Input it into the replacement kettle, and react for 20-30 minutes under the action of stirring. The generated lithium salt of tert-decanoate is dissolved in the water phase, and the mixed phase output from the replacement kettle is separated by a high-speed centrifuge to separate the water phase and the glue liquid phase. Thereby obtain SEBS glue and aqueous phase after impurity removal; Described the first pipeline type high-shear emulsifier, the secon...

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Abstract

The invention relates to a process for industrialized continuous removal of alkaline impurities in an SEBS rubber liquid or an SBS rubber liquid. An emulsifying machine for emulsifying deionized water with a rubber liquid and an emulsifying machine for emulsifying neodecanoic acid with the rubber liquid are in series operation, and thereafter, a high-speed centrifugal separator is used for separating the emulsified water and the emulsified rubber liquid, moreover, the high-speed centrifugal separator operates in a continuous feeding mode, and lithium ions and other alkaline impurities in the SEBS rubber liquid or the SBS rubber liquid are continuously and effectively removed; the process is simple and efficient, and is suitable for industrialized production for removal of the alkaline impurities in the SEBS rubber liquid or the SBS rubber liquid.

Description

technical field [0001] The invention belongs to the field of preparation technology of macromolecule SEBS or SBS materials, and in particular relates to a technology for industrialized continuous removal of alkaline impurities in SEBS glue or SBS glue. Background technique [0002] Baling brand SEBS products are developed using technology with independent intellectual property rights, which fills the gap in the domestic rubber industry. SEBS products are products after hydrogenation of styrene-butadiene block copolymers, which have excellent aging resistance and high and low temperature performance, and are widely used in wire and cable, auto parts, toys, adhesives and polymer modification, etc. multiple fields. The composite antioxidant system used in SEBS products has good thermal oxidation resistance and weather resistance, which includes a phosphite antioxidant and a phenolic antioxidant. Since the industrial production of SEBS in 2006, 2.6.4, 6.2.6, TNP, etc. have bee...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/04C08F6/00
Inventor 王旭邢立江李望明张旭刘祥
Owner CHINA PETROLEUM & CHEM CORP
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