Method for recovering trioctyl trimellitate
A technology for trioctyl trimellitate and residues, which is applied in the field of recovering trioctyl trimellitate residues in refined preparations, and can solve problems such as affecting product yield, increasing the burden of solid waste treatment, and affecting the environment
Active Publication Date: 2013-03-27
JIANGSU BAICHUAN GAOKE NEW MATERIAL CO LTD +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
If this part of trioctyl trimellitate is discarded, on the one hand, it will affect the yield of the product, and on the other hand, it will also affect the environment and increase the burden of solid waste treatment
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0020] Step 1: take by weighing 300g refined preparation residue and 300g absolute ethanol;
[0021] Step 2: mixing the refined preparation residue and ethanol, stirring at room temperature for 1 h, so that the trioctyl trimellitate adsorbed on the refined preparation residue can be transferred to ethanol, and at the same time reduce the viscosity of the mixed solution;
[0022] Step 3: filter the mixture;
[0023] Step 4: Add 12 g of water to the filtrate and leave it to stand to separate the ethanol solution and trioctyl trimellitate;
[0024] Step five: separate the trioctyl trimellitate in the lower layer;
[0025] Step 6: Let the separated upper ethanol containing a small amount of moisture flow through a drying column loaded with 0.5 m high 3A molecular sieves. The dried ethanol has a moisture content of 0.12% and can be used for the treatment of the next batch of refining agent residues.
[0026] The trioctyl trimellitate obtained by the above recovery method was anal...
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Abstract
The invention relates to a method for recovering trioctyl trimellitate. The method is characterized in that a proper amount of absolute ethanol or reused ethanol is mixed and stirred with refining agent residue so that the trioctyl trimellitate absorbed on the refining agent residue can be transferred into the ethanol, meanwhile, the viscosity of the mixed liquid is reduced, the mixed liquid is filtered, a small amount of water is added in the filter liquid, the still standing is carried out so that phase separation of the ethanol solution and the trioctyl trimellitate is realized, the trioctyl trimellitate at the lower layer is separated out, the ethanol containing less moisture at the upper layer flows through a drying column loaded with a 3A molecular sieve, and the dried ethanol is reused for treating a next batch of refining agent residue. The method can be used for recovering the trioctyl trimellitate from the refining agent residue generated in the trioctyl trimellitate production process in a simple mode, the energy consumption of the method is low, and the method conforms to the clean production concept.
Description
technical field [0001] The invention relates to a method for recovering trioctyl trimellitate in refined preparation residues, belonging to the technical field of fine chemicals. Background technique [0002] Trioctyl trimellitate, also known as tri(2-ethyl)hexyl trimellitate, is a durable plasticizer, suitable for 105°C grade cable materials and other heat-resistant products. Plastic products made of trioctyl trimellitate have better migration resistance, extraction resistance and volatility resistance than plastic products using dioctyl phthalate as a plasticizer. [0003] The industrial production of trioctyl trimellitate is obtained by the reaction of trimellitic anhydride and octanol (2-ethylhexanol). At present, the trimellitic anhydride produced industrially cannot achieve high purity and low melting chroma. Therefore, in order to obtain trioctyl trimellitate with a lower color number, it is necessary to add a refining agent during the production process, and adopt ...
Claims
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IPC IPC(8): C07C69/76C07C67/56
Inventor 郑铁江薛建军杨伟浩
Owner JIANGSU BAICHUAN GAOKE NEW MATERIAL CO LTD