Preparation method of phosphoric acid three (1-chloro-2-propyl) ester

A production method and phosphoric acid technology, applied in the field of flame retardants, can solve problems such as large differences and lack of comparability, and achieve the effects of high production efficiency, environmental friendliness, and few steps

Pending Publication Date: 2013-07-31
天津市联瑞阻燃材料有限公司
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  • Abstract
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Problems solved by technology

[0005] The above-mentioned patents are quite different from the technical solutions of the present invention and are not comparable

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  • Preparation method of phosphoric acid three (1-chloro-2-propyl) ester

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Embodiment Construction

[0020] In conjunction with the following embodiments, the following embodiments are illustrative and not restrictive. The following embodiments cannot be used to limit the protection scope of the present invention.

[0021] The production method of tris(1-chloro-2-propyl) phosphate, the steps are as follows:

[0022] Routing

[0023]

[0024] Specific steps are as follows:

[0025] ⑴ Ingredients: Pump a quantitative amount of phosphorus oxychloride into the reaction tank with negative pressure at one time, add catalyst (titanium tetrachloride or sodium metasilicate), and use nitrogen to press the quantitative amount of propylene oxide into the high-level metering tank;

[0026] Ingredient ratio: Phosphorus oxychloride: Propylene oxide: Titanium tetrachloride = 500kg: 610kg: 500 ml (about 0.86kg), the amount of sodium metaaluminate is phosphorus oxychloride weight × 0.15wt%;

[0027] Propylene oxide and phosphorus oxychloride are used as starting materials, and the molar ratio of phosphor...

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Abstract

The present invention is directed to a preparation method of phosphoric acid three (1-chloro-2-propyl) ester, which comprises the following steps of (1) preparing ingredients; (2) synthesizing: stirring and slowly dropping the epoxy propane at the temperature of 57 to 62 DEG C for 20+2 hours, pouring the cold water to the reaction tank jacket, controlling internal liquid temperature at 60+3 DEG C, completing the addition of epoxy propane, end-point controlling the PH value at 5.5-6; (3) rinsing the resultant product; (4) dehydrating; (5) analyzing: sampling to analyze, filtering the qualified to package for storage. According to the invention, the preparation method of phosphoric acid three (1-chloro-2-propyl) ester has few production process and precise control of synthesis condition, such as temperature, PH value, etc., and synthesized products have high purity, production efficiency, and indexes of products are in line with the environmental and fire-retardant requirements.

Description

Technical field [0001] The invention belongs to the field of flame retardants, in particular to a production method of tris(1-chloro-2-propyl) phosphate. Background technique [0002] Phosphorus-based flame retardants are widely used due to their wide variety and excellent flame retardant properties. With people's in-depth research on the thermal degradation process of polymer materials and the mechanism of flame retardant systems, new flame retardant theories and technologies are gradually being recognized. Such as high polymer chemical modification flame retardant, high efficiency barrier carbonized layer flame retardant, cross-linked flame retardant and synergistic flame retardant system, etc., greatly enriched the content of flame retardant science and the scope of people to choose the optimal flame retardant system. For a long period of time in the future, phosphorus-based flame retardants will still dominate and have great potential for development. There are many varietie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/09
Inventor 张云刚张传义赵春忠刘雪坤
Owner 天津市联瑞阻燃材料有限公司
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