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Rare-earth metal compound and synthetic process thereof

A rare earth metal and synthesis process technology, applied in the field of rare earth metal compounds and their synthesis process, can solve the problems of poor acid resistance and alkali resistance, prone to corrosion, fluorescence disappearance, etc., achieve uniform dispersion, improve fluorescence intensity, luminous intensity improved effect

Active Publication Date: 2013-04-24
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is that the rare earth metal compound used in the red fluorescent material in the prior art is poor in acid and alkali resistance, and the printed matter made of it is easy to corrode when encountering acidic or alkaline pollutants. Loss of fluorescence and poor dispersion in ketones, esters and alcohols

Method used

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  • Rare-earth metal compound and synthetic process thereof
  • Rare-earth metal compound and synthetic process thereof
  • Rare-earth metal compound and synthetic process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A europium compound having the chemical formula:

[0037]

[0038] The synthetic technique of this europium compound is as follows:

[0039] (1) Dissolve 14.20 grams (0.075mol) of 2-hydroxyquinoline-4-carboxylic acid and 19.35 grams (0.075mol) of salicylic acid diester in a solution containing 6.00 grams (0.15mol) of sodium hydroxide in 600ml of water , The pH value of the carboxylate solution generated by the reaction is 7.

[0040](2) Dissolve 8.8 grams of europium oxide (0.025 mol) in a certain amount of 37% hydrochloric acid, make 150 ml of aqueous solution, adjust the pH value of the solution to 6, and prepare the hydrochloride of Eu; within 30 minutes, the prepared The hydrochloride of Eu is added dropwise to the carboxylate solution, stirring continuously during the dropping and reaction process, the reaction temperature is controlled at 30°C, the reaction is kept for half an hour, and the precipitate generated by the reaction is filtered and washed , get fi...

Embodiment 2

[0044] A europium-gadolinium compound having the chemical formula:

[0045]

[0046] The synthetic technique of this europium-gadolinium compound is as follows:

[0047] (1) Dissolve 14.20 grams (0.075mol) of 2-hydroxyquinoline-4-carboxylic acid and 19.35 grams (0.075mol) of salicylic acid diester in 600ml of water containing 6.00 grams (0.15mol) of sodium hydroxide In , the pH value of the carboxylate solution generated by the reaction was 7.

[0048] (2) Dissolve 3.52 grams (0.01mol) of europium oxide and 5.43 grams (0.015mol) of gadolinium oxide in a certain amount of 37% hydrochloric acid to make a 150 ml aqueous solution, adjust the pH value of the solution to 6, and prepare Eu and the hydrochloride of Gd; in 30 minutes, the hydrochloride of the described Eu and Gd that will prepare is added dropwise in the described carboxylate solution, constantly stirs during dropping and reaction, and the control reaction temperature is 70 ℃, the reaction was incubated for half a...

experiment example 3

[0052] A europium-gadolinium compound having the chemical formula:

[0053]

[0054] The synthetic technique of this europium-gadolinium compound is as follows:

[0055] (1) Dissolve 8.52 grams (0.045mol) of 2-hydroxyquinoline-4-carboxylic acid and 27.09 grams (0.105mol) of salicylic acid diester in 600ml containing 6.00 grams (0.15mol) of sodium hydroxide 1: 1 In ethanol-water solution, the pH value of the carboxylate solution generated by the reaction is 8

[0056] (2) Dissolve a rare earth mixture of 3.52 grams (0.01mol) of europium oxide and 5.43 grams (0.015mol) of gadolinium oxide in a certain amount of nitric acid to prepare a 150 ml aqueous solution, and adjust the pH value of the solution to 6 to prepare europium and gadolinium The nitrate of europium and gadolinium is added dropwise to the carboxylate solution in 30 minutes, constantly stirring during the dropwise addition and reaction process, controlling the reaction temperature to be 50°C, and keeping the temp...

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Abstract

The invention discloses a rare-earth metal compound and a synthetic process thereof. The chemical general formula of the rare-earth metal compound is shown in the specification, wherein x is more than 0, and y is not less than 0; m and n are more than 0, and m+n is equal to 3(x+y); z is equal to x+y; and Re is any of rare-earth metal elements except for Eu. The rare-earth metal compound can serve as a red fluorescent material, and the rare-earth metal compound has good acid resistance properties, alkaline resistance properties and powder dispersibility compared with the red fluorescent material in the prior art.

Description

technical field [0001] The invention belongs to the field of rare earth metals, and in particular relates to a rare earth metal compound and a synthesis process thereof. Background technique [0002] Rare earth metal compounds are compounds formed by the reaction of rare earth metals with other substances. Rare earth metal elements are the general term for the 17 elements of scandium, yttrium, and lanthanide in Group IIIB of the periodic table of chemical elements. They are often represented by R or Re. Their names and chemical symbols are scandium (Sc), yttrium (Y), lanthanum (La ), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho ), Erbium (Er), Thulium (Tm), Ytterbium (Yb), Lutetium (Lu). An important use of rare earth metal compounds is as a fluorescent material, mainly used in the field of marking data carriers and document products. [0003] Among the rare earth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C07D487/04C09K11/06
Inventor 杨素华孙萍丁广辉丁景华张继卿
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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