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Experimental method for measuring the amount of solvent replacement required for polyvinyl acetate in cleaning equipment and pipelines

A polyvinyl acetate, cleaning equipment technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of not being able to confirm the cleaning of polyvinyl acetate, and achieve the effects of saving production costs, saving solvent volume, and good technical effects

Active Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that it is impossible to confirm whether polyvinyl acetate has been cleaned in the prior art, and a new experimental method for measuring the amount of solvent replacement required for polyvinyl acetate in cleaning equipment and pipelines is provided

Method used

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  • Experimental method for measuring the amount of solvent replacement required for polyvinyl acetate in cleaning equipment and pipelines

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Embodiment 1

[0019] in such as figure 1 On the device shown, the solvent is methanol, the test steel pipe E is 304 stainless steel, 1.5m long, 0.05m in diameter, and then the required cleaning density is 241.78kg / m 3 1. Fill the steel pipe with low-viscosity polyvinyl acetate, fill the steel pipe, and calculate the amount m1 of polyvinyl acetate added through the quality difference with the steel pipe, which is 2.847kg. Then turn on the plunger feeding pump B, flush the methanol in the solvent tank A into the test steel pipe E, and the polyvinyl acetate and methanol mixture enters the waste liquid tank H through the pipeline G. With the continuous addition of methanol, the test steel pipe The polyvinyl acetate in E is completely replaced, the test steel pipe E is filled with methanol (can be measured by mass), the mixed solution of polyvinyl acetate and methanol in the waste liquid tank H is collected, and the weight m2 of the mixture after washing is weighed as 10.9589 kg.

[0020] The ...

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Abstract

The invention relates to an experiment method used for measuring solvent displacement amount needed for cleaning polyvinyl acetate in equipment and pipelines. The experiment method is mainly used for solving a problem that it is impossible to determine whether polyvinyl acetate in equipment and pipelines is removed completely by existing technology. The experiment method used for measuring solvent displacement amount needed for cleaning polyvinyl acetate in equipment and pipelines comprises following steps: (1) polyvinyl acetate is delivered into an experimental steel tube E, and the amount of filled polyvinyl acetate (m1) is calculated; (2) a solvent is delivered into the experimental steel tube E; (3) polyvinyl acetate in the experimental steel tube E is displaced continuously, when the total weight of the experimental steel tube E and materials in the experimental steel tube E is stable, a mixed solution collected by a waste liquid tank H is weighted so as to obtain the amount of the mixed solution (m2), and the solvent displacement amount m0=m2-m1. The experiment method is capable of solving the above problem preferably, and can be used for experiments used for measuring solvent displacement amount needed for cleaning polyvinyl acetate in equipment and pipelines.

Description

technical field [0001] The invention relates to an experimental method for measuring the amount of solvent replacement required by polyvinyl acetate in cleaning equipment and pipelines. Background technique [0002] Vinylacetate (VAc) can undergo homopolymerization or copolymerization with many other monomers. It is one of the 50 largest chemical raw materials in the world. Vinyl acetate is a synthetic polymer compound obtained by polymerization or copolymerization. Vinyl acetate has been increasingly used in the fields of coatings, synthetic fibers, leather processing, and soil improvement through the production of a series of derivatives such as polyvinyl acetate, polyvinyl alcohol, and acetal resin. Wide range of applications. [0003] The intermediate product of vinyl acetate polymerization, polyvinyl acetate, is a high-viscosity liquid, which often sticks to the inner wall of equipment and pipelines during the production process, resulting in equipment blockage. There...

Claims

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Application Information

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IPC IPC(8): G01N5/00
Inventor 张晨姜杰赵磊王康
Owner CHINA PETROLEUM & CHEM CORP
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