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Regeneration preparing method for supported copper-bismuth catalyst

A copper-bismuth catalyst and a supported technology are applied in the field of regeneration and preparation of supported copper-bismuth catalysts, which can solve the problems of large destructiveness of the catalyst carrier structure, reduced catalyst activity, heat and impact sensitivity, etc., so as to improve waste utilization rate and pollution Small, low heating temperature effect

Inactive Publication Date: 2016-03-23
苏英慧
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AI Technical Summary

Problems solved by technology

This method is simple and easy to operate, but it consumes a lot of energy and pollutes a lot
At the same time, the most dangerous substance in the catalyst regeneration process is the possible residual copper acetylene. Dry copper acetylene is extremely sensitive to heat and shock, and can be detonated by friction, with a low safety factor.
In addition, this method is very destructive to the structure of the catalyst support, which will greatly reduce the activity of the catalyst.

Method used

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Embodiment 1

[0016] Embodiment 1. a kind of regeneration preparation method of supported copper-bismuth catalyst is characterized in that: comprise the following steps:

[0017] Step 1), preparation: seal the discarded copper-bismuth catalyst with water, store it for 1-6 days, and take the filter cake filtered by suction. The filter cake refers to the liquid contained in the original solution retained on the filter after the liquid passes through the filter Solid matter is the solid matter after filtering the mixture of waste copper bismuth catalyst and water;

[0018] Step 2), carry out the first liquid-phase oxidation: add the filter cake obtained in step 1) into the agitator, then add 30% by weight oxidant into the agitator, stir, and then add 0.2% by weight of copper The ion protectant, the copper ion protectant is sodium acetate solid, heat the stirred material to 30-40°C, stir for 30-50min, cool, filter with suction, wash the filter cake, and dry to obtain the dried filter cake;

[...

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Abstract

The invention relates to a regeneration preparing method for a supported copper-bismuth catalyst generated in a reaction of synthesizing acetylene and formaldehyde into 1,4-butynediol. The steps of water seal suction filtration and two-time liquid-phase oxidation are adopted. The regeneration preparing method concretely includes the steps that a filter cake is added into a stirrer, an oxidizing agent is added into the stirrer and stirred, a copper ion protective agent is added then, and the stirred materials are heated, stirred, cooled, filtered in a suction mode, washed and dried to obtain a regenerated copper-bismuth catalyst. As the waste copper-bismuth catalyst, the oxidizing agent and the copper ion protective agent react at different temperatures, high polymer impurities such as formaldehyde and polyyne compounds in the waste copper-bismuth catalyst are removed, and finally the catalyst can be regenerated and used. The regeneration preparing method is low in energy consumption, small in pollution coefficient and high in safety and has high economic value.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a regeneration preparation method of a waste copper-bismuth catalyst generated in the reaction of synthesizing 1,4-butynediol from acetylene-formaldehyde, in particular to a method for synthesizing 1,4-butyne from acetylene-formaldehyde The invention discloses a regeneration preparation method of a supported copper-bismuth catalyst generated in the reaction of diols. Background technique [0002] At present, the alkyne aldehyde method is the main process for producing 1,4-butanediol, and the production capacity of this method accounts for 46.3% of the world's total production capacity, accounting for the main position. The waste alkyne aldehyde reaction catalyst in the constant production process of the alkyne aldehyde method, that is, the copper bismuth catalyst will be discharged as waste. The main components of the waste copper bismuth catalyst are metal copper bismuth and res...

Claims

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Application Information

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IPC IPC(8): B01J23/94B01J23/843B01J38/48B01J38/64
Inventor 苏英慧刘文杰翟树军焦金涛王玉玲马文清
Owner 苏英慧
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