Method for synthesizing o-hydroxy benzophenone-rare earth coordination compound

A technology of o-hydroxybenzophenone and rare earth complexes, applied in the preparation of aldehyde/ketone chelates, organic chemistry, etc., can solve the problems of high production investment and production energy consumption, high production costs, and high solubility, and achieve The effects of production equipment investment and reduction, environmental protection and safety improvement, and production energy consumption reduction

Inactive Publication Date: 2010-03-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] (1) Because the solubility of the o-hydroxybenzophenone-rare earth complex in organic solvents is relatively large, the yield is low;
[0011] (2) Since the organic solvent recovery system must be configured, the production equipment investment and production energy consumption are relatively high;
[0012] (3) Sin...

Method used

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  • Method for synthesizing o-hydroxy benzophenone-rare earth coordination compound
  • Method for synthesizing o-hydroxy benzophenone-rare earth coordination compound

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Effect test

Embodiment 1

[0034] At room temperature, 224.2 g of 2-hydroxy-4-methoxybenzophenone (HMBP, 1mol), containing LaCl 3 81.8g (0.333mol) of lanthanum chloride aqueous solution and 40.0g (1mol) of NaOH containing sodium hydroxide aqueous solution, add water until the total mass of the solution is about 1000g, then stir, heat up to 40°C, control the constant temperature reaction for 10min, the reaction forms After filtration, washing and dehydration, the product was dried at 105°C under normal pressure to constant weight to obtain a yellow powder product with a yield of 99.3%. It is determined by analysis that the melting point of the product is >300°C; the contents of La, C and H are 16.77%, 61.49% and 4.68% respectively, which is the same as the chemical formula La(MBP) 3 Consistent (the calculated values ​​of La, C, and H contents are 16.92%, 61.40%, and 4.75%, respectively).

Embodiment 2

[0036] At room temperature, 224.2 g of 2-hydroxy-4-methoxybenzophenone (HMBP, 1mol), containing LaCl 3 122.7g (0.5mol) of lanthanum chloride aqueous solution and 60.0g (1.5mol) of sodium hydroxide aqueous solution containing NaOH, add water until the total mass of the solution is about 1000g, then stir, heat up to 40°C, control the constant temperature reaction for 10min, and react The resultant was filtered, washed with water and dehydrated, then dried at 105°C under normal pressure to constant weight to obtain a yellow powder product with a yield of 99.5%. It is determined by analysis that the melting point of the product is >300°C; the contents of La, C and H are 23.27%, 22.59% and 4.07% respectively, which is the same as the chemical formula La(MBP) 2 (OH) is consistent (the calculated values ​​of La, C, and H contents are 23.06%, 55.79%, and 3.98%, respectively).

Embodiment 3

[0038] At room temperature, 224.2 g of 2-hydroxy-4-methoxybenzophenone (HMBP, 1mol), containing LaCl 3 245.4g (1mol) of lanthanum chloride aqueous solution and 120.0g (3mol) of sodium hydroxide aqueous solution containing NaOH, add water until the total mass of the solution is about 1000g, then stir, heat up to 40°C, control the constant temperature reaction for 10min, the reaction product After filtering, washing with water and dehydration, it was dried at 105°C under normal pressure to constant weight to obtain a yellow powder product with a yield of 99.1%. It is determined by analysis that the melting point of the product is >300°C; the contents of La, C and H are 34.95%, 42.49% and 3.15% respectively, which is the same as the chemical formula La(MBP)(OH) 2 Consistent (the calculated values ​​of La, C, and H contents are 35.07%, 42.41%, and 3.03%, respectively).

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Abstract

The invention discloses a method for synthesizing an o-hydroxy benzophenone-rare earth coordination compound. The synthesis method comprises the following steps: firstly, mixing o-hydroxy benzophenone, water soluble rare earth salt, alkali and water used as a reaction medium according to the stoichiometric ratio at a temperature below the melting point of the o-hydroxy benzophenone, then stirring, regulating the temperature, reacting, completing the reaction and obtaining a product of the o-hydroxy benzophenone-rare earth coordination compound by filtering, washing, dewatering and drying the obtained product. The invention realizes that the water is used as the reaction medium for synthesizing the o-hydroxy benzophenone-rare earth coordination compound by a one-step reaction; compared with the prior art requiring taking an organic solvent as the reaction medium, the operation is greatly simplified, the yield, the production efficiency, the environmental protection and the safety are obviously enhanced, and the production cost is correspondingly lowered.

Description

technical field [0001] The invention relates to a method for synthesizing o-hydroxybenzophenone-rare earth complexes, more specifically, the invention relates to a method for synthesizing o-hydroxybenzophenone-rare earth complexes in one step with water as the reaction medium. Background technique [0002] O-hydroxybenzophenone is a class of organic compounds whose core structure is shown in the following formula: [0003] [0004] Because they can strongly absorb the solar ultraviolet rays that can cause polymer materials to degrade, and have a high degree of light resistance, they have been widely used as UV absorber light stabilizers for polymer materials (Genhut R, Miller H. Handbook of Plastic Additives. Translated by Cheng Guoxiang, Yao Kangde, etc. Beijing: Chemical Industry Press, 2000). [0005] Recently, the patent literature (CN1730454) reported that the o-hydroxybenzophenone ultraviolet absorber can not only significantly improve the photostabilization perfor...

Claims

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Application Information

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IPC IPC(8): C07C49/92C07C45/77
Inventor 吴茂英毛芳赖文华
Owner GUANGDONG UNIV OF TECH
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