Method of using membrane distributor to greenly prepare cuprous oxide with controllable morphology

Abstract

The invention relates to a method of using a membrane distributor to greenly prepare cuprous oxide with controllable morphology. The method comprises: using a raw material (mixture of copper salts, alkali sources and citrates) of cuprous oxide as a continuous phase and the reducing agent glucose as a disperse phase, passing the disperse phase through membrane holes at a certain rate into the continuous phase, allowing reacting to form cuprous oxide particles of specific morphology, filtering, washing, and drying to obtain cuprous oxide powder. The method has the advantages that cuprous oxide particles having different morphologies, such as sphere, cuboid, truncated octahedron, octahedron and octangle, and different particle sizes can be prepared just by adjusting reaction material concentration; the reaction solution is quickly and efficiently mixed in micro drop form via a membrane dispersion technique, mass transfer is enhanced, the product has uniform and regular particle size and morphology; using high-price surfactants and toxic reducing agents or organic solvents is not required; the method features good operational convenience, greenness, safety, good amplifying convenienceand the like.

Description

technical field [0001] The invention relates to a method for preparing cuprous oxide, in particular to a method for greenly preparing cuprous oxide with controllable morphology by a membrane distributor. Background technique [0002] As an important inorganic chemical raw material, cuprous oxide is widely used in various fields of industrial production, such as ship bottom antifouling, catalysis, ceramic colorant, electronics industry, etc. Due to the different morphology Cu 2 O has different physical and chemical properties, and Cu with controllable morphology 2 The preparation of O has become a research hotspot. [0003] At present, there are still some problems in the preparation process of cuprous oxide with different structures, such as: (1) some synthetic routes will use toxic reducing agents or organic solvents such as hydrazine hydrate, hydroxylamine hydrochloride, sodium borohydride, etc.; (2) ) A large number of surfactants such as PVP, SDS, CTAB, etc. are often...

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Problems solved by technology

[0003] At present, there are still some problems in the preparation process of cuprous oxide with different structures, such as: (1) some synthetic routes will use toxic reducing agents or organic solvents such as hydrazine hydrate, hydroxylamine hydrochloride, sodium borohydride, etc.; (2) ) A large number of surfactants such as PVP, SDS, CTAB, etc. are often used in the regulation process of different morphologies, which will cause certain pollution to the environment in the subsequent separation and washing process; (3) in the preparation of Cu 2 In the process of O powder, due to the uneven mixing of the reaction system and the influence of local supersaturation, the particle size and shape of the product will be messy, and it is difficult to form uniform and regular particles.

[0004] Chinese patent CN 106698498 A discloses a method for preparing cuprous oxide with various morphologies. During the experiment, the surfactant [Emim]Br (1-ethyl-3-methylimidazole bromide) was added and passed Regulate its concentration to prepare octahedron, truncated octahedron, spherical and other structures with a particle size of 5-10 μm. However, the addition of too much surfactant increases the cost on the one hand, and on the other hand also increases the cost in the subsequent separation and washing process. Will cause some pollution to the environment

But this method does not involve how to control the shape, especially does not involve the control of the shape of cuprous oxide powder

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