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Preparation method of Ectoine-based palladium-carbon catalyst

A technology of palladium carbon catalyst and ectoine, which is applied in the field of precious metals, can solve the problem of poor loading effect of palladium carbon catalyst and achieve the effect of reducing ammonia pollution

Pending Publication Date: 2021-11-05
刘毅毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing palladium-carbon catalyst based on ectoine, which solves the problem of poor loading effect of the existing palladium-carbon catalyst, and utilizes the group adsorption brought about by the activation of activated carbon Ability to adsorb palladium ions to form in-situ fixation, and then use ectoine to form a closed filling, use water absorption to absorb ammonia water, and achieve in-situ palladium hydroxide conversion

Method used

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  • Preparation method of Ectoine-based palladium-carbon catalyst

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Effect test

Embodiment 1

[0020] A method of preparing a catalyst by palladium carbon usually caused by gram-based, comprising the steps of:

[0021] Step one, the activated carbon support was pretreated to give a clean and dry activated carbon; said pretreatment comprises the steps of: a1 activated carbon was added to an aqueous solution of ethanol ultrasonic 10min, the volume concentration of ethanol is 50% aqueous ethanol solution. , the temperature of the ultrasound is 40 ℃, a2, ultrasound into the activated carbon impregnated with a solution of hydrochloric acid in 10min, 20min and then immersed in an alkaline solution is added to give the activated carbon, pH 3 to the hydrochloric acid solution, the alkaline solution aqueous ammonia solution, and a pH of 9;

[0022] Step 2, palladium acetate acetone solution was added to a stirred uniformly form a palladium - acetone solution, and then the activated carbon was added, and the low temperature water bath, a microwave reactor IH, remove the dry film obta...

Embodiment 2

[0028] A method of preparing a catalyst by palladium carbon usually caused by gram-based, comprising the steps of:

[0029]Step 1, the active carbon carrier is pre-treatment, and clean activated activated carbon; the pretreatment comprises the step of: A1. Add activated carbon to an ethanol 20min, the ethanol volume concentration of the ethanol solution is 70%. The ultrasonic temperature is 60 ° C, A2, and the ultrasound active carbon is placed in a hydrochloric acid solution for 20 min, then the alkaline solution is immersed in an alkaline solution to obtain activated activated carbon, the pH of the hydrochloric acid solution 4, the alkaline solution It is aqueous ammonia solution, and the pH is 10;

[0030] Step 2, the palladium acetate is added to the acetone solution to stir well, then the activated activated carbon is added, and the activated activated carbon is added, and the microwave reaction is 3 h, and the drying is dried to obtain a coated palladium-activated carbon, an...

Embodiment 3

[0036] A method of preparing a palladium carbon catalyst based on Ike, including the following steps:

[0037] Step 1, the active carbon carrier is pre-treatment, and clean activated activated carbon; the pretreatment includes the step of: A1. Add activated carbon to an ethanol solution of 15 min, the ethanol volume concentration of the ethanol aqueous solution is 60%. The ultrasonic temperature is 50 ° C, A2, and the ultrasound active carbon is placed in a hydrochloric acid solution for 15 min, then the alkaline solution is immersed in an alkaline solution to obtain activated activated carbon, the pH of the hydrochloric acid solution is 4, the base The sex solution is an aqueous solution, and the pH is 9;

[0038] Step 2, the palladium acetate is added to the acetone solution and stirred and uniformly forms a palladium-acetone liquid, and then activated activated carbon is added, and a low-temperature water bath microwave reaction is 2 h, and the drying is dried to obtain a coate...

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Abstract

The invention belongs to the field of noble metals, and particularly relates to a preparation method of an Ectoine-based palladium-carbon catalyst, which is characterized in that an Ectoine seaming agent and a water-retaining agent are matched with the group adsorbability of activated carbon to prepare the palladium-carbon catalyst. According to the invention, the problem of poor loading effect of the existing palladium-carbon catalyst is solved, the group adsorption capacity brought by activation of the activated carbon is utilized to adsorb palladium ions and form in-situ fixation, then Ectoine is utilized to form closed filling, the water absorption is utilized to adsorb ammonia water, and in-situ palladium hydroxide conversion is achieved.

Description

Technical field [0001] The present invention belongs to the field of noble metals, particularly relates to a method for preparing a catalyst based on palladium carbon according to a result of multi-gram. Background technique [0002] Palladium on charcoal catalyst was prepared by the palladium metal supported on activated carbon prepared from the main role is unsaturated by catalytic hydrogenation of carbon monoxide or hydrogen. It has a high hydrogenation, selectivity, stability, use is smaller than the feed, boilerplate, easy to recycle, etc., it is widely used in the petrochemical industry, pharmaceutical industry, electronic industry, the perfume industry, the dye industry and other fine Chemical reduction of the hydrogenation refining process. [0003] Currently, the preparation of Pd / C catalyst substantially by dipping, while water-soluble metal palladium ions into better results will be achieved insoluble compounds, such as a water-soluble palladium compound is hydrolyze...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/44B01J37/00B01J37/02B01J37/03
CPCB01J37/035B01J37/0217B01J37/0018B01J23/44B01J21/18B01J37/0207Y02E60/50
Inventor 刘毅毅
Owner 刘毅毅
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