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A kind of 2-(thio-2-methoxyethyl) benzothiazole and its preparation method and application

A technology of methoxyethyl and benzothiazole, which is applied in the field of 2-benzothiazole and its preparation, and achieves the effect of simple and reliable preparation method

Active Publication Date: 2021-02-05
KUNMING BOREN PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many kinds of extractants for extracting palladium, mainly including oxygen-, nitrogen-, phosphorus-, and sulfur-containing extractant organic compounds. Among them, sulfur-containing extractants are considered to be the most selective extractants for the extraction and separation of platinum and palladium. There are studies on the performance of palladium extraction by alkyl sulfides (sulfur-containing extractants) with different structures, but there are few reports on the sulfur-containing extractants with heterocyclic substituents.

Method used

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  • A kind of 2-(thio-2-methoxyethyl) benzothiazole and its preparation method and application
  • A kind of 2-(thio-2-methoxyethyl) benzothiazole and its preparation method and application
  • A kind of 2-(thio-2-methoxyethyl) benzothiazole and its preparation method and application

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Experimental program
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Embodiment 1

[0031] Take 0.03mol of 2-mercaptobenzothiazole in a 250mL three-neck flask, add 80-100mL of acetone to dissolve it completely, then add KOH which is equimolar to 2-mercaptobenzothiazole, heat and reflux at 60°C for 30min, Add 2-bromoethyl methyl ether and 2-mercaptobenzothiazole equimolar molarity into the liquid funnel drop by drop, and finish adding in about 20 minutes, heat, stir and reflux for 6 hours, then cool to room temperature. The precipitate was removed by filtration, and the product was obtained after distilling off the acetone. The prepared reaction equation is:

[0032]

[0033] The molecular formula of the prepared 2-(thio-2-methoxyethyl)benzothiazole is C 10 h 11 NOS 2 , the relative molecular mass is 225.33. The structural formula is:

[0034]

[0035] The chemical characteristic parameters of 2-(thio-2-methoxyethyl)benzothiazole are:

[0036] 1 H NMR (400MHz, CDl 3 )δ7.86(d, J=8.1Hz, 1H), 7.75(d, J=8.0Hz, 1H), 7.41(t, J=7.7Hz, 1H), 7.29(t, J=7.6...

Embodiment 2

[0041] In an acidic medium with an HCl concentration of 0.2mol / L, 10.0mL of the mixed material solution containing palladium and platinum with a concentration of 263.1mg / L and 169.4mg / L was taken as the aqueous phase; chloroform was used as the diluent, and MOBT was used as the The extractant is used as the organic phase according to the volume ratio of MOBT and chloroform at 1:50; the organic phase and the aqueous phase are put into a 60mL separatory funnel according to the ratio (O / A) 1:1, and the phases are mixed for 30 minutes and left to stand. After phase separation, measure the concentration of palladium and platinum in the aqueous phase respectively, and obtain the concentration of palladium and platinum in the organic phase by subtraction, and calculate the extraction rate, distribution ratio and separation coefficient; take the organic phase loaded with palladium and place it in a separatory funnel In, add 1.0mol / L thiourea and carry out stripping, leave standstill af...

Embodiment 3

[0043] In an acidic medium with an HCl concentration of 0.3mol / L, 10.0mL of a mixed material solution containing palladium and platinum with a concentration of 421.8mg / L and 200.9mg / L was taken as the aqueous phase; chloroform was used as the diluent, and MOBT was used as the The extractant is used as the organic phase according to the volume ratio of MOBT and chloroform at 1:50; the organic phase and the aqueous phase are put into a 60mL separatory funnel according to the ratio (O / A) 1:1, and the phases are mixed for 30 minutes and left to stand. After phase separation, measure the concentration of palladium and platinum in the aqueous phase respectively, and obtain the concentration of palladium and platinum in the organic phase by subtraction, and calculate the extraction rate, distribution ratio and separation coefficient; take the organic phase loaded with palladium and place it in a separatory funnel In, add 1.0mol / L thiourea and carry out stripping, leave standstill afte...

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Abstract

The invention discloses a 2-(thio-2-methoxyethyl)benzothiazole and its preparation method and application, belonging to the preparation and use of compounds with thiazole heterocyclic asymmetric structures. 2-(thio-2-methoxyethyl) benzothiazole compound molecular formula of the present invention is C 10 h 11 NOS 2 , referred to as MOBT, Mr225.33. Its preparation is to weigh a certain amount of 2-mercaptobenzothiazole in a three-necked flask, add acetone to dissolve, and then use an appropriate amount of H 2 O was dissolved in equimolar KOH and added into a three-necked flask, heated to reflux at 60°C, and equimolar 2-bromoethyl methyl ether was added dropwise, refluxed for 6 hours and the solvent was separated. In the present invention, the difference in the extraction rate of palladium and platinum by MOBT is used to realize the effective separation of palladium and platinum in the feed liquid. In the hydrochloric acid medium with low acidity, MOBT has better selective extraction performance for palladium, and the separation coefficient of palladium and platinum is higher. Good separation.

Description

technical field [0001] The invention belongs to the field of chemical separation, and in particular relates to 2-(thio-2-methoxyethyl)benzothiazole and its preparation method and application. Background technique [0002] Platinum group metals are widely used in petroleum, chemical, pharmaceutical, electronics, electroplating, chemical fiber, printing and other industries, and are known as the "vitamins" and "modern new metals" of modern industry. [0003] Both palladium and platinum belong to the platinum group metal elements and belong to group VIII in the periodic table of elements. They have the same number of valence electrons and similar ionic radii, so the properties of the metals are very similar, so separation has become a difficult problem in metallurgy. At present, palladium and platinum are separated by precipitation method, ion exchange method, solvent extraction method and so on. Among them, the solvent extraction method has the characteristics of simplified p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D277/74C22B11/00C22B3/34
CPCC07D277/74C22B11/04C22B3/362Y02P10/20
Inventor 冯绍平黄兆龙李自静张国伟刘卫刘贵阳
Owner KUNMING BOREN PRECIOUS METALS