DMMn production process

By optimizing the reaction conditions and separation process of formaldehyde and formaldehyde in the DMMn production process, including hydrotreatment and atmospheric distillation, the problem of excessive steam consumption in the existing process is solved, and the production of high-purity DMMn is achieved and energy consumption is reduced.

CN119638558APending Publication Date: 2025-03-18湖北三里枫香科技有限公司
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Patent Information

Application Number
CN202411824388.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The existing DMMn production process requires a lot of steam to be consumed during the distillation and separation of light components such as methylacetal and products, resulting in higher energy consumption.

Method used

Using 70-90% aqueous formaldehyde solution and 90% by weight or more formaldehyde, the ratio of the molar amount of formaldehyde and formaldehyde is controlled to be (0.5-5): 1, and DMMn is formed under the action of a solid acid catalyst. Subsequently, hydrotreating and atmospheric distillation were carried out, combined with neutralization and dehydration treatment, and a high-purity DMMn product was separated and prepared.

Benefits of technology

It effectively reduces the consumption of steam during distillation and separation, reduces energy consumption, and at the same time, the produced DMMn product has high purity and low water content.

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Abstract

The invention discloses a DMMn production process, and relates to the technical field of chemical production. The DMMn production process comprises the following steps: mixing a high-concentration formaldehyde aqueous solution and methylal, and enabling formaldehyde and methylal to react under the action of a solid acid catalyst to generate DMMn, the reacted material is subjected to hydrotreatment, so that formaldehyde in the material and hydrogen are subjected to a hydrogenation reaction to generate methanol, a reaction product contains a small amount of acidic substances, and an alkaline substance is added into the reaction product for neutralization; and removing light components from the material after the neutralization reaction, and dehydrating to obtain the DMMn product. According to the technical scheme provided by the invention, a high-purity DMMn product can be prepared by adopting a relatively low dosage of methylal, and the consumption of steam during rectification separation can also be effectively reduced.
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