A kind of production method of trioctyl trimellitate
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A technology of trioctyl trimellitate, production method, applied in the field of organic chemical raw material manufacturing, to achieve the effects of reducing time, improving production efficiency, and reducing filtration processes
Active Publication Date: 2016-08-17
NANTONG BAICHUAN NEW MATERIAL CO LTD +2
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TiO 2 It is doubtful whether it can play a catalytic role in the esterification reaction of trimellitic anhydride and octanol, and this method does not mention the use of nitrogen protection during the reaction process, strict control of the chromaticity of trimellitic anhydride raw materials and other measures to achieve adsorption without activated carbon Decolorization can produce trioctyl trimellitate whose color meets the requirements
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Embodiment 1
[0040] A production method of trioctyl trimellitate, the steps comprising:
[0041] (1) Put 18m in an esterification kettle 3 octanol, start stirring, then drop into 7000kg of trimellitic anhydride with a content of 97.2%, and the melting chroma is 60 platinum-cobalt color number, stir for 60min, so that trimellitic anhydride is dissolved in octanol;
[0042] (2) Introduce nitrogen into the first esterification kettle, and control the flow rate of nitrogen to 1.8Nm 3 / h, replace the air in the kettle with nitrogen, pass the steam into the heating coil of the first esterification kettle, heat the first esterification kettle, set the target temperature to 120°C, when the actual temperature of the material in the first esterification kettle When it reaches 119°C, close the steam inlet valve of the steam, and then it will be observed that as the monoesterification reaction proceeds, the heat released by the reaction will make the actual temperature of the material in the kettle r...
Embodiment 2
[0053] A production method of trioctyl trimellitate, the steps comprising:
[0054] (1) Put 18m in an esterification kettle 3 Octanol, start stirring, then drop into 7152kg of trimellitic anhydride with a content of 95.13%, and the melting chroma is 100 platinum-cobalt color number, stir for 60min, so that trimellitic anhydride can be dissolved in octanol;
[0055] (2) Introduce nitrogen into the first esterification kettle, and control the flow rate of nitrogen to 1.8Nm 3 / h, replace the air in the kettle with nitrogen, pass the steam into the heating coil of the first esterification kettle, heat the first esterification kettle, set the target temperature to 120°C, when the actual temperature of the material in the first esterification kettle When it reaches 119°C, close the steam inlet valve, and then it will be observed that as the monoesterification reaction proceeds, the heat released by the reaction will make the actual temperature of the material in the kettle rise by ...
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Abstract
The invention discloses a production method of trioctyl trimellate. In order to control the quality of a raw material trimellitic anhydride, nitrogen protection is used during a production process; a small quantity of titanate catalysts is added to completely carry out esterification reaction on the conditions that two-stage esterification reaction and the byproduct water generated by the reaction is removed, thus the synthesised product does not need to be neutralized or only needs to be neutralized with a small quantity of a neutralizer, which means that the product possibly reaches the standards of high-quality products in terms of indexes such as chroma and acid value without being absorbed and decolored by activated carbon, thus avoiding the influence on chroma due to the existence of active carbon micro-particles and the problems occurring in downstream applications of the product due to the addition of lots of the neutralizer and the residue of lots of salts in the product; and the given aftertreatment method can be carried out to solve the problem when the acid value of the product is slightly high due to the low raw material purity of trimellitic anhydride, or acid regurgitation and the like occurring in a process of adding water to destroy the titanate catalysts.
Description
technical field [0001] The invention relates to a production method of a plasticizer, in particular to a production method of a trioctyl trimellitate plasticizer, and belongs to the field of organic chemical raw material production. Background technique [0002] Trioctyl trimellitate is the same as some other common plasticizers, because it is liquid at room temperature, it is easy to transport and use, and in addition, this type of ester has a high boiling point, low volatility, moderate molecular weight, and the molecule contains some Branched chain is very good for improving the plasticity and softness of plastic and rubber, so it is often used as a plasticizer. [0003] With the official implementation of RoHS 2.0 (2011 / 65 / EU) regulations by the European Union since January 2013, dioctyl phthalate (DEHP), dibutyl phthalate (BBP) and butyl phthalate Benzyl ester (DBP) and other plasticizers used in larger amounts are listed as hazardous substances with priority, and will...
Claims
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