The latest preparation method of rubidium carbonate_industrial additives

The latest preparation method of rubidium carbonate [Background and Overview]

Rubidium carbonate can be used as chemical reagents and raw materials in the chemical industry and glass industry. Examples of its application are as follows:

1. Used to prepare rubidium pentaborate. Including the following steps:

a. Add rubidium carbonate to 20-30wt% boric acid solution and stir to obtain a reaction solution; wherein the weight of rubidium carbonate is 7.5-11.5% of the weight of water in the boric acid solution;

b. Filter the reaction solution obtained in step a and dry the filter cake to obtain.

The reaction formula of boric acid and rubidium carbonate solution in the method of the present invention is as follows:

2. Rubidium carbonate is used to prepare high-performance glass beads for reflective films. The glass beads are made of the following raw materials by weight: sea pumice 33-45, calcium silicate slag 21-32, topaz 24-39, rubidium carbonate 14-23, kaolin 18-29, barite 25-35, borax 10-15, calcium sulfate 5-10, sodium nitrate 6-12, barium titanate 5-10, potassium hexafluorophosphate 4-8. Additive 8-12; the additive is mixed with the following raw materials by weight: 5-10 bismuth oxychloride, 7-13 cerium phosphate, 4-8 cobalt chromate, 3-5 barium peroxide, and selenium Sodium phosphate 4.5-6.5, indium tin oxide 2-4, yttrium oxalate 4-6, molybdenum disilicide 8-12, strontium titanate 5-7.

The latest preparation method of rubidium carbonate [Preparation]

With the existing methods for preparing high-purity rubidium carbonate, to obtain a high-purity product, you must first use traditional extraction methods to go through dozens or even hundreds of levels of extraction. The extraction efficiency is low, the extraction agent is wasted seriously, it is time-consuming and labor-intensive, and in When separating the organic solvent and the stripping liquid, since the two phases are difficult to separate cleanly, it is impossible to obtain high-purity rubidium carbonate by simply burning the wet material after the stripping liquid is concentrated and crystallized at high temperature. Studies have reported a new extraction method that uses a bipolar membrane and a cation exchange membrane to combine extraction and back-extraction to achieve the purpose of preparing high-purity rubidium carbonate, reduce the waste of organic extractants, and avoid environmental pollution. At the same time, high-purity products are obtained, the operation is safe and easy, the process flow is simple, and it is suitable for industrial automated production. The method uses rubidium-containing waste liquid as a raw material, and the rubidium-containing waste liquid is the waste liquid after extracting cesium from the cesium garnet acid leaching solution and the mother liquor in the production of tetrahydrofurancarboxylic acid/or rubidium salt; the steps of the method are as follows:

A. Prepare the liquid to be extracted

(1) Concentrate rubidium-containing waste liquid to a concentrated solution with a mass percentage concentration of Rb element of 15 to 25%;

(2) Removal of magnesium and iron: Add lime slurry to the concentrated solution obtained in step (1), adjust the pH to above 11, stir for more than five minutes, then let it stand for more than half an hour and filter;

(3) Removal of aluminum, calcium and barium: Add dilute sulfuric acid solution (5%~15%) to the filtrate obtained in step (2), adjust the pH to 6.0~6.5, stir for more than five minutes, and then let it stand for half a minute. above hours, filter;

(4) Further calcium removal: Add sodium carbonate solution (5% to 10%) to the filtrate obtained in step (3), adjust the pH to 7.5 to 8.0, stir for more than five minutes, and then let it stand for more than half an hour. Filter to obtain the extract;

B. Use an electric extraction device to extract rubidium from the liquid to be extracted to prepare a rubidium acetate stripping solution

The latest preparation method of rubidium carbonate [main reference materials]

[1] Chemical Dictionary

[2] Zeng Ying; Yu Xudong; Liu Lingli; Yin Qinghong. Preparation method of rubidium pentaborate. CN201310141772.2, application date 2013-nitropyridine 04-23

[3] Fan Chunping. High-performance glass beads for reflective films and preparation method thereof CN201510388211.1, application date 2015-07-01

[4] Zhao Zhenghong; Li Xing; Chen Ge; Xu Tao; Huang Lei. A method for preparing high-purity rubidium carbonate CN201510217943.4, application date 2015-04-29