Continuous post-treatment process for octabromoether

Abstract

The invention provides a continuous post-treatment process foroctabromoether, which comprises the steps of A, enabling an octabromoether solution and water to enter a layering kettle through a dynamic tubular reactor; and B, after the materials are fully stood, opening a kettle bottom valve of the layering kettle to transfer the materials, in the material transferring process, detecting the material conductivity in real time, obtaining an electrode reading, and comparing the electrode reading with a set value, and switching a discharge pipeline according to a comparison result to complete material separation. The method 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, the amplitude is reduced by 75%, and the water washing time is greatly shortened; and the ion content in the octabromoether is reduced to less than 10 ppm from original 100 ppm, and the reduction amplitude exceeds 90%.

Description

technical field [0001] The invention relates to the field of octabromoether production, in particular to a continuous post-treatment process for octabromoether. Background technique [0002] Octabromoether, also known as tetrabromobisphenol A (2,3-dibromopropyl) ether, referred to as BDDP, has a molecular weight of 943.65. It is an off-white powder with low toxicity, soluble in benzene, acetone, chloroform, etc., insoluble in water and ethanol, and its decomposition temperature is greater than 285°C. Octabromoether is the main product of deep processing of tetrabromobisphenol, which has better flame retardant effect. [0003] As an additive flame retardant, octabromoether is a high-efficiency flame retardant containing both aromatic bromine and aliphatic bromine, and has excellent thermal stability and light stability. Octabromoether is mainly used as a plastic flame retardant, especially in polypropylene and polystyrene. Octabromoether has excellent thermal stability and...

AI Technical Summary

Problems solved by technology

[0005] However, the applicant found that in the post-production treatment process of octabromoether, 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. unstable quality

Further, due to the above-mentioned reasons, the ion content in the final product octabromoether is high and cannot be effectively reduced, so that the octabromoether product cannot be applied 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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