Method for preparing strontium magnetic solid super acidic catalyst by immersing and baking method

A solid super acid and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, carboxylate preparation, etc., can solve the problems of narrow application scope, complex preparation process steps, difficult recovery and other problems, and achieve extended application fields , The process steps are simple, and the effect of expanding the demand area

Inactive Publication Date: 2011-04-06
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method mainly has the following disadvantages: (1) the preparation process steps are complicated, the production equipment is more, the equipment investment is large, and the production cost is higher
(2) Due to the poor magnetic properties of the magnetic substrate ferroferric oxide, it is difficult to recycle, which eventually leads to low catalyst recovery, insufficient resource utilization, and pollutes the environment. cost of production
(3) The narrow range of element doping results in a narrow application range and cannot be popularized and applied

Method used

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  • Method for preparing strontium magnetic solid super acidic catalyst by immersing and baking method
  • Method for preparing strontium magnetic solid super acidic catalyst by immersing and baking method
  • Method for preparing strontium magnetic solid super acidic catalyst by immersing and baking method

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Embodiment 1

[0028] A method for preparing strontium magnetic solid superacid catalyst by dipping and roasting, the specific steps are as follows:

[0029] (1) extract strontium carbonate

[0030] Using strontium slag as raw material, the strontium slag is pulverized by a pulverizer first, and then sieved with a sieve with an aperture of 0.074mm, and the strontium slag on the sieve and the sieved strontium slag powder are collected respectively. The strontium slag on the sieve is returned to pulverization and sieving; to the strontium slag powder sieved, the mass (g) of the strontium slag powder: molar concentration is 2.6mol / L and the volume (mL) ratio of the hydrochloric acid leaching agent is 1 : ratio of 7, put strontium slag powder and hydrochloric acid leaching agent into the reaction vessel, then heat with 98°C water bath, and stir and dissolve with a stirrer for 40min, stop heating and stirring, cool to room temperature, and filter for the first time with a filter , respectively c...

Embodiment 2

[0038] A method for preparing strontium magnetic solid superacid catalyst by dipping and roasting, the specific steps are as follows:

[0039] In the 1st (1) step: the molar concentration of hydrochloric acid is 2.5mol / L, the mass (g) of strontium slag powder: the volume (mL) ratio of hydrochloric acid leaching agent is 1: 6, and the temperature of water bath is 95 ℃, stirs The dissolving time is 35min, and the pH value of the filtrate collected by filtering for the first time is adjusted with sodium hydroxide solution to be 11.98, and the volume of adding sodium carbonate solution is 4 times of the filtrate collected by the second filtration, the reaction time is 15min, and the drying temperature is 100°C.

[0040] In (2) step: the mass (g) of strontium carbonate powder: the volume (mL) ratio of hydrochloric acid solution is 1: 6.4, and the mol ratio of strontium and iron is 1: 12.2, the mass (g) of ferric chloride hexahydrate : The volume (mL) ratio of distilled water is 1:...

Embodiment 3

[0045] A method for preparing strontium magnetic solid superacid catalyst by dipping and roasting, the specific steps are as follows:

[0046] In the 1st (1) step: the molar concentration of hydrochloric acid is 2.7mol / L, the quality (g) of strontium slag powder: the volume (mL) ratio of hydrochloric acid leaching agent is 1: 8., the temperature of water bath is 100 ℃, The stirring and dissolving time is 45min, and the pH value of the filtrate collected by the first filtration is adjusted with sodium hydroxide solution to be 12.15, and the volume of the sodium carbonate solution added is 6 times that of the filtrate collected by the second filtration, and the reaction time is 25min. It is 110°C.

[0047] In (2) step: the mass (g) of strontium carbonate powder: the volume (mL) ratio of hydrochloric acid solution is 1: 6.6, and the mol ratio of strontium and iron is 1: 12.6, and the mass (g) of ferric chloride hexahydrate : The volume (mL) ratio of distilled water is 1: 2.6, an...

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Abstract

The invention discloses a method for preparing a strontium magnetic solid super acidic catalyst by an immersing and baking method, relating to a preparation method of inorganic magnetic catalysts. The method of the invention comprises the following steps: using strontium slag as raw material to prepare strontium carbonate at first, preparing strontium ferrite by a coprecipitation method, and then using the strontium ferrite as magnetic substrate to prepare the finished product by the immersing and baking method. The invention has the advantages of simple process step, less equipment and low production cost. The strontium slag is used as the raw material so as to comprehensively utilize the strontium slag and meet requirements of green chemical, energy-saving and emission-reduction mode. The strontium magnetic solid super acidic catalyst prepared by the method of the invention has the advantages of repeated utilization and high recovery rate of 95.5%, and is convenient in recovery. The invention can be widely used for preparing magnetic solid super acidic catalysts, and magnetic solid super acidic catalyst products prepared by the method of the invention can be widely used for preparing carboxylic ester matters and can be widely used in coating, man-made leather, printing ink, chemical and plastic products, medicine industries and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of functional materials, and in particular relates to a preparation method of an inorganic magnetic catalyst. Background technique [0002] The magnetic catalyst is a new type of catalyst obtained by loading a catalyst with a magnetic medium as the substrate. Its biggest advantage is that it is convenient for the recycling and reuse of the catalyst. While making a great contribution to reducing the discharge of industrial waste, it is also in line with the requirements of green chemistry. development trend. [0003] The strontium magnetic solid superacid catalyst can replace the liquid acid catalyst. The recycling of strontium magnetic solid superacid catalyst can reduce the production cost. The strontium magnetic solid superacid catalyst can be used to catalyze the synthesis of carboxylate substances, such as n-butyl acetate. The main production and consumption areas of n-butyl ace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C07C69/14C07C67/08
CPCY02P20/584
Inventor 刘成伦谢太平徐龙君王星敏丁世环
Owner CHONGQING UNIV
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