Method for storing styrene monomer

A technology for styrene and storage methods, applied in chemical instruments and methods, purification/separation of hydrocarbons, coating, etc., can solve the problems of prolonging the cleaning cycle of styrene storage tanks and the decline of polymerization inhibition effect, and achieve extended maintenance Tank cleaning cycle, long-lasting polymerization inhibition effect, and good polymerization inhibition performance

Inactive Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a storage method for styrene-based monomers, which blocks the formation of oligomers on the coating, improves the polymerization inhibition effect of the coating, and solves the problem of coating polymerization inhibitors in the prior art. The problem of decreased polymerization inhibition effect in the later stage of release prolongs the cleaning cycle of styrene storage tanks

Method used

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  • Method for storing styrene monomer
  • Method for storing styrene monomer
  • Method for storing styrene monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0036] Coating intermediate layer preparation:

[0037] In a 10L reactor with a stirrer, add EP828 type epoxy resin paint base material, and add uniformly ground tert-butylcatechol and dihydroxypropyl hydroxylamine compounded polymerization inhibitor in proportion to the system under stirring conditions , the mixing mass ratio of the two is 5:1, and the heat preservation reaction is 1h, and the coating base materials with different polymerization inhibition properties are obtained. Before painting, add the auxiliary material thick paste amine adduct to the above-mentioned base material for stirring, wherein the mixing ratio of base material and thick paste amine adduct is 6:1 (volume ratio), and the stirring time is 0.5h. Then paint the above material on the standard tinplate plate (50×100×0.2~0.3mm), and the coating thickness is about 100 μm. After the coating was dry, the adhesion was tested, and the test results under different reaction conditions are shown in Table 1.

...

Embodiment 6-12

[0042] Coating Surface Preparation:

[0043] Add the auxiliary material thick paste amine adduct into a 10L reactor with a stirrer, after the dispersant is ground evenly, add it into the reactor under stirring conditions, and keep it warm for 0.5-2 hours to obtain coating auxiliary materials with different dispersion properties . Add the auxiliary material to the base material for stirring before painting, wherein the mixing ratio of base material and auxiliary material is 8:1 (volume ratio), and the stirring time is 1h. Then paint the above material on the standard tinplate plate (50×100×0.2~0.3mm), and the coating thickness is about 80 μm. After the coating dries up, the adhesion is tested, and the results are shown in Table 2:

[0044] The test result of table 2 coating top layer

[0045]

[0046] It can be known from Table 2 that the coating is prepared according to the method of the present invention, and the adhesion of the coating is good, which meets the requirem...

Embodiment 13-16

[0048] Investigation of coating inhibition effect:

[0049] Brush epoxy resin paint on the inner wall of the roof of the 5L styrene storage tank. The preparation method of epoxy resin paint is as follows:

[0050] Primer coating material: directly mix base material and auxiliary material thick paste amine adduct in a ratio of 7:1 (volume ratio), stirring and mixing time 0.5h.

[0051] Intermediate layer coating material: prepared according to the method of Examples 1 to 5, adding compound polymerization inhibitor TBC+HPHA to the base material, TBC:HPHA is 3:1, the addition accounts for 25% of the coating amount, and the reaction temperature is 35 °C, the reaction time is 1 h, and the coating base material with polymerization inhibition properties is obtained. Before painting, add the auxiliary material mastic amine adduct to the above-mentioned base material for stirring, wherein the mixing ratio of base material and mastic amine adduct is 7:1 (volume ratio), and the stirring...

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Abstract

The invention relates to a method for storing a styrene monomer, and belongs to the technical field of storing a styrene monomer in a storage tank. According to the method, a coating is applied to an inner wall of the styrene monomer storage tank. The coating comprises a base layer, an intermediate layer, and a top layer, wherein the base layer is a coating free of a polymerization inhibitor or dispersant, the intermediate layer is a coating containing a polymerization inhibitor, and the top layer is a coating containing a dispersant. The top layer is made by (1) adding a dispersant in an auxiliary material, and performing heating and stirring; and (2) adding the solution obtained in the step (1) into a base material of a coating material, performing stirring and mixing, and applying the obtained product. Through the method, formation of an oligomer on the coating is blocked, the polymerization inhibiting effect is improved, the difficulty that the polymerization inhibiting effect is reduced after a polymerization inhibitor is released in the prior art is overcome, and the cleaning period of the styrene storage tank is prolonged.

Description

technical field [0001] The invention relates to a method for storing styrene monomers, and belongs to the technical field of storing styrene monomers in storage tanks. Background technique [0002] Styrene monomer has active chemical properties and is an important polymer monomer. It can be polymerized by itself or with other monomers, and is widely used in the synthesis of polymer materials, coatings, medicine and other fields. Styrene undergoes slow thermally activated polymerization at ambient temperature. Therefore, when styrene monomer is transported or stored, a polymerization inhibitor must be added to ensure product quality. [0003] Commonly used storage inhibitors are tert-butylcatechol (TBC), 2,5-di-t-pentylhydroquinone, hydroquinone, p-hydroxyanisole, etc., which are crystalline substances at room temperature. During storage, at a certain temperature, part of the styrene monomer in the storage tank will vaporize and condense on the top, side wall, bracket, nozz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C07C7/20C07C15/46
CPCC09D163/00C07C7/20C08K5/13C08K5/17C08K5/50C07C15/46
Inventor 菅秀君王申军马瑞杰贾庆龙孙丛丛
Owner CHINA PETROLEUM & CHEM CORP
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