Liquid-phase automatic synthesis reactor of yttrium vanadate

An automatic synthesis and synthesis reaction technology, applied in vanadium compounds, chemical/physical/physical chemistry fixed reactors, inorganic chemistry, etc., can solve the problems of low control level, poor working environment, small scale, etc., to improve quality and efficiency, saving manpower and space

Inactive Publication Date: 2013-07-17
FUJIAN CASTECH CRYSTALS
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a big gap between the industrialization process of yttrium vanadate crystals in my country and the needs of technological development, and has not yet met the requirements of the development of traditional industries and high-tech fields in terms of quality and quantity; industrial system
The specific manifestations are: 1) The production equipment is backward, the control level is low, the output of a single machine is small, the yield rate is low, and the product quality is unstable, etc.; );
[0005] 3) The level of industrialization and engineering is low, and the development of raw materials and special equipment supporting crystal production is unbalanced; product application development needs to be strengthened, and disorderly competition among peers needs to be resolved
[0008] The technical problem to be solved by the present invention is to provide an intelligent liquid-phase synthesis reaction device to solve the shortcomings of the traditional liquid-phase synthesis method due to manual operation: serious waste of weighing, low accuracy, large randomness, and high labor intensity. Dangerous chemicals are prone to injury, the working environment is poor, the data cannot be verified, and the process reproducibility is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: Two sets of automatic weighing devices accurately weighed 99.995% ammonium metavanadate and 99.99% yttrium oxide 77.57g and 75.65g respectively, and the raw materials were put into the dissolution tank through the feeding tank and the feeding tank, and the solenoid valve was opened to dissolve Inject 9000ml of deionized water into pool A, adjust the separatory funnel and add 120ml of ammonia water, start heating and stirring to make the solution clear and transparent, then add 5ml of EDTA, stir until the solution is transparent, and obtain ammonium metavanadate solution. Add 2000ml of deionized water to yttrium oxide dissolving tank B, add 150ml of concentrated nitric acid, heat to boiling, stir and dissolve until transparent to obtain yttrium nitrate solution, then inject 7000ml of deionized water to dilute the solution, and stir evenly. Then use electric aspirator to filter separately to remove insoluble impurities. Start the solenoid valve to slowly inj...

Embodiment 2

[0016] The automatic weighing device accurately weighs 226.04g of 99.99% yttrium oxide and 2.37g of 99.95% neodymium oxide powder, and reacts with concentrated nitric acid in the B dissolution tank to form a nitrate solution. The automatic weighing device accurately weighs 227.91g of 99.995% ammonium metavanadate powder, and dissolves it in the ammonia solution in the A dissolution pool to form an ammonium metavanadate solution. After the insoluble impurities were removed by suction filtration, the two solutions were fully stirred and mixed in the reaction tank, and the pH value was adjusted to 7.0~7.6 with ammonia water, and the reaction produced 0.39% Nd: YVO4 precipitate.

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PUM

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Abstract

The invention discloses a liquid-phase automatic synthesis reactor of yttrium vanadate. The liquid-phase automatic synthesis reactor can be used for the liquid-phase chemical synthesis of yttrium vanadate, and is especially suitable for the raw material synthesis of czochralski method growth yttrium vanadate and crystals doped therein. The intelligent synthesis reactor is composed of an automatic feeding zone, a raw material dissolving zone, a pumping-filtration impurity-removal zone, a synthetic reaction zone and a PLC intelligent control device. The liquid-phase automatic synthesis reactor can realize the streamline production comprising the operations of intelligent control, automatic feeding, raw material dissolving, pumping-filtration impurity-removal, and synthetic reaction of the whole raw material preparation process, has the characteristics of intelligence, saving, environmental protection, high efficiency, stability, reliability and the like, and can strongly push forward the standardized and large-scale development of the crystal industry.

Description

technical field [0001] The invention relates to an intelligent device applied to liquid-phase chemical synthesis of raw materials, and is particularly suitable for the liquid-phase synthesis of raw materials for growing yttrium vanadate and its doped crystals by pulling method. Background technique [0002] Yttrium vanadate (YVO4) crystal is an excellent birefringent crystal material. Compared with traditional birefringent crystal materials - rutile, calcite and lithium niobate, it has large birefringence, large optical damage threshold, and good light transmission performance. , wide range of light transmission bands, deliquescence resistance, easy processing and other outstanding advantages. It is mainly used in optical isolators, circulators, optical beam splitters and infrared polarizers in optical fiber communication. [0003] Neodymium-doped yttrium vanadate (Nd: YVO4) is a laser crystal with excellent performance. The crystal has the characteristics of large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J19/18C01G31/00
Inventor 曾宪林吴少凡郑熠
Owner FUJIAN CASTECH CRYSTALS
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