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Preparation method of TCPP (trichloropropylphosphate) flame retardant

A flame retardant and catalyst technology, applied in the field of TCPP flame retardant preparation, can solve problems such as dark color, affecting product appearance and sales, and achieve the effects of favorable production, improved appearance and convenient operation

Inactive Publication Date: 2013-01-23
YIXING YANGYANG PLASTIC ADDITIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of TCPP (trichloroisopropyl phosphate), the color of the product obtained by using phosphorus oxychloride as a raw material will be very dark, and the color number (platinum-cobalt) will be greater than 50, which will affect the appearance and sales of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Add 200g of phosphorus oxychloride to a 500ml flask, first add 0.3g of NaOH aqueous solution, and then add the catalyst aluminum trichloride, heat up to 65 degrees, start to add propylene oxide dropwise, keeping the temperature constant, and add dropwise After completion, keep the temperature at 80 degrees for 2 hours, and then undergo alkaline washing, liquid separation, water washing, liquid separation, and distillation to obtain the finished product. Compared with the standard platinum-cobalt colorimetric solution, the color number is No. 50.

Embodiment 2

[0013] Example 2 200g of phosphorus oxychloride was added to a 500ml flask, 0.4g of NaOH aqueous solution was added dropwise, and then the catalyst aluminum trichloride was added, the temperature was raised to 65 degrees, and propylene oxide was started to be added dropwise, keeping the temperature constant, and then added dropwise After completion, keep the temperature at 80 degrees for 2 hours, and then undergo alkaline washing, liquid separation, water washing, liquid separation, and distillation to obtain the finished product. Compared with the standard platinum-cobalt colorimetric solution, the color number is No. 40.

Embodiment 3

[0014] Example 3 Add 200g of phosphorus oxychloride to a 500ml flask, first add 0.5g of NaOH aqueous solution, and then add the catalyst aluminum trichloride, heat up to 65 degrees, start to add propylene oxide, keeping the temperature constant, and add dropwise After completion, keep the temperature at 80 degrees for 2 hours, and then undergo alkaline washing, liquid separation, water washing, liquid separation, and distillation to obtain the finished product. Compared with the standard platinum-cobalt colorimetric solution, the color number is No. 30.

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PUM

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Abstract

The invention discloses a preparation method of TCPP (trichloropropylphosphate) flame retardant, which comprises the following steps of: reacting phosphorus oxychloride with propylene oxide to obtain a TCPP crude product under the catalysis of a Lewis acid catalyst, then washing the crude product by alkali and water and distilling;. after phosphorus oxychloride is added into a reaction vessel, dropwise adding NaOH aqueous solution, then adding a catalyst and dropwise adding propylene oxide for reaction. The color number of the finished product of TCPP is reduced to below No.30 at present, to No.10 as the lowest, from the original above No.60 produced without dropwise adding the sodium hydroxide aqueous solution. The method provided by the invention has the advantages of convenience, simplicity and easiness of operation and is good for operation in production, and enables the appearance of the product to be improved significantly without affecting the yield and acid value of TCPP, as well as the quality of TCPP.

Description

Technical field [0001] The invention belongs to the field of chemical engineering and relates to a preparation method of a TCPP flame retardant. Background technique [0002] TCPP (Trichloroisopropyl Phosphate), English name: Tris (clorisopropyl) Phosphate, Chinese alias: flame retardant plasticizer TCPP; Tris(chloroisopropyl) phosphate; Tris(2-chloro-1-methyl) Tris(2-chloropropyl)phosphate; Tris(2-chloropropyl)phosphate; Tris(chloroisopropyl)phosphate. Molecular formula: C 9 H 18 Cl 3 PO 4 , Molecular weight: 327.56, CAS NO.: 13674-84-5. It is a commonly used low molecular weight phosphorous halogen flame retardant, mainly used for the flame retardant of PVC, polystyrene, phenolic resin, acrylic resin, rubber and coating. The current preparation method of TCPP flame retardant is as follows: Phosphorus oxychloride is catalyzed by Lewis acid catalyst, reacts with propylene oxide to obtain crude TCPP, the catalyst is removed by alkaline washing, the liquid is separated, and then ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/09
Inventor 潘小明仇国才史广平
Owner YIXING YANGYANG PLASTIC ADDITIVE
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