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Production technology of hexabromo cyclododecane

A hexabromocyclododecane and production process technology, which is applied in the field of improvement of the production process of hexabromocyclododecane, can solve problems such as poor thermal stability, peculiar smell of products, complicated production process, etc., and achieve the goal of improving thermal stability Effect

Inactive Publication Date: 2007-01-31
HUALUN CHEM SUZHOU CITY
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

The product currently on the market has certain quality problems due to the complex production process and a certain amount of impurities in the product, that is, the product has a peculiar smell and poor thermal stability.

Method used

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Experimental program
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Embodiment Construction

[0023] specific implementation plan

[0024] A hexabromocyclododecane production process, the process steps are as follows:

[0025] 1. Bromination process:

[0026] (1), feed intake: add 420 kilograms of bromine in the reactor.

[0027] (2), dripping: drop 3-5 kilograms of bromine into the reactor, at this moment, bromine and triene are added dropwise synchronously, and the flow rate of bromine and triene is controlled, and bromine is 30 kilograms / half an hour, Triene is 9.5 kg / half hour. At the same time, control the bromine temperature < 15°C. The dropwise addition of bromine is finished first. At this time, there is still about 3 kg of triene. After the dropwise addition, it should be kept warm for 3 hours. The holding temperature is 14°C±2°C, and the discharge should be completed. , Put the material into a special plastic bucket, cover it and let it rest for 24 hours after weighing.

[0028] 2. Filtration and drying process:

[0029] Pump the solvent in the upper lay...

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Abstract

The present invention discloses a hexabromocyclododecane production process capable of effectively improving product quality. Said process includes the following procedures: bromization procedure, filter and centrifugal drying procedure, washing procedure, boiling procedure, drying procedure, powder-sieving procedure and solvent recovery procedure. It is characterized by that it adopts chloroform and isobutanol as medium, so that it can raise thermal stability of product. Said product is a good fire retarding agent, therefore it has extensive application.

Description

technical field [0001] The present invention relates to a kind of chemical synthesis of halogenated cycloalkane, especially relates to the improvement of a production process of hexabromocyclododecane. Background technique [0002] Hexabromocyclododecane is a good flame retardant, widely used in polystyrene, polypropylene, thermosetting epoxy resin, and can also be used in synergists, antioxidants, pigments, fillers, acid cleaning agents, ultraviolet Stabilizer etc. The product currently sold on the market has certain quality problems due to the complicated production process and a certain amount of impurities in the product, that is, the product has peculiar smell and poor thermal stability. Patent application number: 95112739.X, name of invention: new process for synthesizing hexabromocyclododecane, which discloses the process steps of its production of hexabromocyclododecane, and the applicant believes that the above-mentioned question. Therefore, how to effectively av...

Claims

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Application Information

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IPC IPC(8): C07C23/02C07C17/02
Inventor 黄一龙
Owner HUALUN CHEM SUZHOU CITY
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