Catalyst for oxidation of hydrogen chloride to prepare chlorine and application thereof

A technology of catalyst and hydrogen chloride, which is applied in the direction of physical/chemical process catalyst, chlorine/hydrogen chloride, preparation of chloride, etc., can solve the problem of high production cost of chlorine, and achieve the effect of increasing surface oxygen concentration and high catalytic activity

Inactive Publication Date: 2014-07-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of electrolyzing hydrochloric acid to prepare chlorine is at the cost of consuming a large amount of electric energy. The electricity consumption per ton of chlorine exceeds 1700 KWh, and the production cost of chlorine is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 160 g of yttrium nitrate and 60.3 g of cerium nitrate in 5000 g of deionized water, stir at a constant temperature in a water bath at 60 °C until completely dissolved, then add 670 g of sodium dodecyl sulfonate to the above solution, at 60 °C After stirring for 12 h, adjust the pH to 10 with 28% ammonia water, continue stirring for 1 h, let it settle for 24 h, filter and wash with deionized water until the pH of the filtrate is 8, dry at 140 °C, and store at 650 °C Calcined for 5 h to obtain 110.8 g of cerium yttrium sulfate. Use H 2 / O 2 Titration analysis shows that the oxygen storage capacity of the oxygen storage material is 3987 μmolO 2 / g yttrium cerium sulfate.

[0033] Dissolve 12.8 g of copper nitrate and 10.6 g of dipotassium hydrogen phosphate in 50 g of water, take 10 g of the above-mentioned yttrium cerium oxysulfate and grind it into a fine powder, add it to a solution containing copper and potassium for 24 h, and dry it at 120 °C. After calci...

Embodiment 2

[0036] Dissolve 50 g of lanthanum nitrate and 162.9 g of cerium nitrate in 4400 g of deionized water, stir at a constant temperature in a water bath at 60 °C until they are completely dissolved, then add 350 g of sodium dodecylsulfonate to the above solution, at 60 °C After stirring for 14 h, adjust the pH to 10 with 28% ammonia water, continue to stir for 1 h, let it settle for 22 h, filter and wash with deionized water until the pH of the filtrate is 8, dry at 140 °C, and store at 650 °C Calcined at lower temperature for 5 h to obtain 86.8 g of cerium lanthanum oxysulfate. Use H 2 / O 2 Titration analysis shows that the oxygen storage capacity of the oxygen storage material is 3987 μmolO 2 / g praseodymium sulfate.

[0037] Dissolve 22 g of chromium acetate and 8.6 g of dipotassium hydrogen phosphate in 35 g of water, take 10 g of the above-mentioned cerium oxysulfate and grind it into a fine powder, add it to a solution containing chromium and potassium for 12 h, dry it at...

Embodiment 3

[0040] Dissolve 150 g of lanthanum nitrate and 132.7 g of yttrium nitrate in 6000 g of deionized water, stir at a constant temperature in a water bath at 70 °C until completely dissolved, then add 760 g of sodium dodecylsulfonate to the above solution, at 70 °C After stirring for 12 h, adjust the pH to 10 with 28% ammonia water, continue stirring for 1 h, let it settle for 24 h, filter, and wash with deionized water until the pH of the filtrate is 8, dry at 140 °C, and store at 550 °C Calcined at lower temperature for 4 h to obtain 120 g of yttrium lanthanum oxysulfate. Use H 2 / O 2 Titration analysis shows that the oxygen storage capacity of the oxygen storage material is 4587 μmolO 2 / g lanthanum oxysulfate yttrium.

[0041] Dissolve 16.4 g of nickel chloride and 6.1 g of potassium nitrate in 125 g of water, take 10 g of the above-mentioned lanthanum oxysulfate and yttrium and grind it into a fine powder, add it to the solution containing nickel and potassium for 24 h, dr...

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PUM

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Abstract

Belonging to the field of catalysts, the invention relates to a catalyst for oxidation of hydrogen chloride to prepare chlorine and application thereof. The catalyst takes a rare earth oxysulfate or a compound composed of the rare earth oxysulfate and other auxiliary materials as a carrier, and adopts the transition metal element chromium, nickel, ruthenium, copper or gold and an alkali metal element as active components. The reaction of oxidizing hydrogen chloride to prepare chlorine is carried out in a fixed bed reactor, the volume ratio of oxygen to hydrogen chloride is 1 / 8-2 / 1, the reaction pressure is 1-10atm, the reaction temperature is 300-430DEG C, and the reaction capacity of hydrogen chloride on unit mass of the catalyst is 0.22-2.38mmol / (g.min).

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a catalyst for producing chlorine by oxidation of hydrogen chloride and an application thereof. Background technique [0002] Chlorine gas is one of the important basic chemical raw materials and is widely used in the fields of polymer materials, medicine, pesticides and drinking water disinfection. However, in the industrial process using chlorine, there is a problem of low utilization rate of chlorine resources. For example, in the process of organic chlorination, the utilization rate of chlorine is only 50%, and the other 50% is converted into by-product hydrogen chloride, while in polyurethane intermediates ( In the production of MDI, TDI, etc.), chlorine is only used as an intermediate carrier, and all chlorine is produced in the form of by-product hydrogen chloride, and the utilization rate of chlorine atoms is "zero". A large amount of by-product hydrogen chloride is made into hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055C01B7/04
Inventor 崔咪芬乔旭戴勇陈献汤吉海费兆阳王男
Owner NANJING UNIV OF TECH
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