Continuous post-treatment process for tetrabromo ether

Abstract

The invention provides a tetrabromo ether continuous post-treatment process, which comprises the following steps: A, enabling a tetrabromo ether solution and water to enter a layering kettle through a dynamic tubular reactor; and B, after the materials are fully stood, opening the kettle bottom valve of the layering kettle to transfer the materials, wherein in the material transferring process, the material conductivity is detected in real time to obtain an electrode reading, the electrode reading is compared with a set value, and a discharge pipeline is switched according to a comparison result to complete material separation. The tetrabromo ether continuous post-treatment process has the beneficial effects that under the condition of the same-scale yield, the original water washing time of 4 hours is shortened to 1 hour, wherein the amplitude is reduced by 75%, and the water washing time is greatly shortened; and the content of ions in tetrabromo ether is reduced from original 100 ppm to less than 10 ppm, wherein the reduction amplitude exceeds 90%.

Description

technical field [0001] The invention relates to the field of tetrabromoether production, in particular to a continuous post-treatment process of tetrabromoether. Background technique [0002] Tetrabromo ether, also known as tetrabromobisphenol A bisallyl ether, is an important reactive flame retardant and a flame retardant crosslinking agent for synthetic polymer materials. Tetrabromoether is mainly used for flame retardant modification of foamed polystyrene, unsaturated polyester, foamed polyurethane, ABS, etc., and can also be used as an intermediate for the synthesis of other flame retardants. [0003] At present, the production method of tetrabromoether mainly has two kinds of process routes. The first process route is prepared by using tetrabromobisphenol A and propene chloride in an alkaline solution of lower aliphatic alcohol and water. The second process route is to use a phase transfer catalyst to prepare tetrabromoether in a medium aqueous solution—one is to add ...

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Problems solved by technology

[0005] However, the applicant found that in the post-production treatment process of tetrabromoether, in the washing process, due to insufficient washing, the washing efficiency is low, and it is often necessary to consume a large amount of water to wash it

At the same time, after the water washing is completed, due to the fact that the material is transferred by naked eyes during the artificial water separation process, the operation accuracy is low and the operation stability is poor. The event of transferring the middle layer liquid to the next process occurs from time to time, which directly leads to the end product tetrabromoether unstable quality

Further, due to the above-mentioned various reasons, the ion content in the final product tetrabromoether is high and cannot be effectively reduced, thus it is impossible to apply tetrabromoether products to the flame-retardant modification of high-end products, which seriously restricts Its application field, the product benefit cannot be improved

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