What are the by-products in the MIBK production process? How to use them as resources?

MIBK production process of by-products and resource utilization

What is MIBK? MIBK (methyl isobutyl ketone) is an important organic compound, which is widely used in coatings, adhesives, solvents and chemical intermediates. In the production process of MIBK, although the main target product is MIBK, due to the influence of reaction conditions, raw material ratio and other factors, some by-products will inevitably be produced. If these by-products are not treated or utilized as resources, they will not only waste resources, but also have a negative impact on the environment and safety production.

What are the by-products of the MIBK production process? The production of MIBK usually adopts the synthesis method, which uses isobutylene and acetone as raw materials and reacts under the action of acidic catalyst. Depending on the reaction conditions, common by-products mainly include the following categories:

1. light component impurity Light impurities mainly refer to unreacted acetone, butene, isobutene and other small molecular compounds. These substances are not completely converted to MIBK during the reaction, but are present in the mixture in the form of small molecules.

2. Recombinant impurities Heavy impurities mainly include high carbon compounds and tar-like substances. These materials are usually formed when the reaction conditions are not ideal, such as excessive temperature, excessive pressure or insufficient catalyst activity.

3. waste sulfuric acid In the production process of MIBK, sulfuric acid is usually used as a catalyst. Since impurities may be introduced into the reaction system, sulfuric acid is gradually deactivated and thus needs to be replaced periodically. If the replacement of waste sulfuric acid is not handled properly, it will cause pollution to the environment.

How to resource utilization of by-products in MIBK production process? For the above by-products, we can take the following ways of resource utilization:

1. Recovery and Utilization of Light Component Impurities Light impurities mainly include acetone and isobutylene and other small molecular compounds. These substances can be recovered by a separation technique such as rectification. The recovered acetone can be reused as a feedstock for MIBK production, while isobutylene can be sold as a by-product to related companies for use as a solvent or fuel.

2. Incineration treatment of impurities in heavy fraction Heavy impurities mainly include high carbon compounds and tar-like substances, which are often difficult to recycle directly. For such by-products, incineration can be considered to convert them into harmless substances such as carbon dioxide and water. It can also be explored to send it to a refinery to be mixed with heavy oil for further processing.

3. Neutralization and Recycling of Waste Sulfuric Acid Waste sulfuric acid is a common acidic waste liquid with strong corrosiveness. In the treatment of waste sulfuric acid, the waste sulfuric acid can be converted into neutral sulfate by way of neutralization reaction. Sulfate can be used as an industrial raw material for the production of fertilizers or other chemicals, thereby realizing the recycling of resources.

Summary and Prospect Although the production process of MIBK will produce a certain amount of by-products, scientific and reasonable resource utilization can not only reduce environmental pollution, but also improve resource utilization efficiency and reduce production costs. In the future, with the advancement of technology and the continuous improvement of environmental protection requirements, the resource utilization of by-products in the MIBK production process will develop in a more efficient and environmentally friendly direction.