Synthesis method of phosphodiesterase (2-ethylhexyl) ester

An ethylhexyl and synthetic method technology, applied in the chemical industry, can solve the problems of the preparation method with many reaction steps, no patent publications, corroded production equipment, etc., and achieves the effects of protecting health, low cost, and reducing labor intensity

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

[0013] At present, there are many preparation methods of di(2-ethylhexyl) phosphate in the prior art. These methods also have their own advantages, but there are also many reaction steps, long routes, low efficiency and energy consumption in the preparation methods. High, corrode production equipment, cause environmental pollution, etc.
[0014] Through the search, no patent publications related to this patent application were found

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  • Synthesis method of phosphodiesterase (2-ethylhexyl) ester

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Embodiment Construction

[0033] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0034] The reagents used in the present invention, unless otherwise specified, are commercially available conventional reagents; the methods used in the present invention, unless otherwise specified, are conventional methods used in this technical field.

[0035] The preparation steps of the calcium-magnesium catalyst used in the present invention are as follows:

[0036] (1) Mix HZSM-5 type molecular sieve, calcium sulfate, magnesium chloride, turmeric powder and water to obtain a mixed solution;

[0037] The mass ratio of HZSM-5 molecular sieve, calcium sulfate, magnesium chloride and sage powder to each 1L of mixed solution is 10:2.9:2.5:1;

[0038] (2) Under stirring conditions, heat to 80±5°C and react for 6~8h;

[0039] (3) After the...

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Abstract

The present invention relates to a synthesis method of phosphodiesterase (2-ethylhexyl) ester, including the following steps of mixing the phosphorus oxychloride and the 2-ethylhexyl alcohol at molar ratio of 1: (1.9 -2.0), adding the calcium-magnesium catalyst, stirring, controlling the pressure in -0.02Mpa to -0.03Mpa, the dropping rate of phosphorus oxychloride at 100+/-5kg/h and the temperature at 55+/-5 DEG C, adding the phosphorus oxychloride for continuous reaction for 4 to 5 hours; maintaining the negative pressure above 700mmHg, heating up to 70+/-2 DEG C to continue reacting for 4 to 5 hours to obtain solids; basifying, acidifying to obtain the crude ester; distilling: heat-distilling the crude ester, collecting the fraction of between 170 and 175 DEG C, to obtain the phosphodiesterase (2-ethylhexyl) ester. The preparation method provided by the invention simplifies the synthesis process, with simple method easy to operate, available raw materials and low cost. Moreover, the synthetic conversion rate of phosphodiesterase (2-ethylhexyl) ester obtained by the method is up to 88%, and the product quality is stable with good effect for use, various technical indicators reaching the standard.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a phosphate type rare metal extractant di(2-ethylhexyl) phosphate, in particular to a synthesis method of di(2-ethylhexyl) phosphate. Background technique [0002] The name of P204 is di(2-ethylhexyl)phosphate, the English name is di(2-ethylhexyil)phosphate, and the molecular formula is C 16 h 35 o 4 P, with a molecular weight of 322.48, has a simplified structure as follows: [0003] [0004] The physical and chemical properties of P204 are: viscous oily liquid, strong acidity. Soluble in general organic solvents and alkalis, insoluble in water. It is flammable and highly irritating. Its quality standards are shown in Table 1: [0005] Table 1 Quality standard of P204 (enterprise standard) [0006] Indicator name indicators Exterior colorless viscous liquid relative density (d 25 25 ) 0.973 freezing point ℃ -60 Fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/11
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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