1072-47-5Relevant articles and documents
Efficient Plastic Waste Recycling to Value-Added Products by Integrated Biomass Processing
Beydoun, Kassem,Klankermayer, Jürgen
, p. 488 - 492 (2020)
The industrial production of polymeric materials is continuously increasing, but sustainable concepts directing towards a circular economy remain rather elusive. The present investigation focuses on the recycling of polyoxymethylene polymers, facilitated through combined catalytic processing of polymer waste and biomass-derived diols. The integrated concept enables the production of value-added cyclic acetals, which can flexibly function as solvents, fuel additives, pharmaceutical intermediates, and even monomeric materials for polymerization reactions. Based on this approach, an open-loop recycling of these waste materials can be envisaged in which the carbon content of the polymer waste is efficiently utilized as a C1 building block, paving the way to unprecedented possibilities within a circular economy of polyoxymethylene polymers.
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Traynelis,Hergenrother
, p. 221 (1964)
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Biomass alcoholysis method for petroleum-based plastic POM
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Paragraph 0030-0051, (2021/05/01)
The invention discloses a biomass alcoholysis method for petroleum-based plastic POM. According to the method, simple biomass derivative alcohol and the petroleum-based plastic POM are allowed to generate a cyclic acetal product through dehydration condensation under catalytic conditions; low reaction cost and high added value are realized, and only water is byproduced and is easy to separate; and an obtained product has high added value, can be used for preparing organic solvents such as lignin and chromatographic analysis solvents, metal surface treatment agents or medical intermediates and monomers, realizes green, efficient and low-cost recovery, and has a high practical application value.
4-methyl-1,3-dioxolane preparation method
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Paragraph 0024-0027, (2020/03/13)
The invention discloses a 4-methyl-1,3-dioxolane preparation method, which comprises: 1, adding a solvent, formaldehyde and a catalyst into a reactor, and heating to 60 DEG C, wherein the solvent is an organic solvent, has a boiling point of more than 120 DEG C and is immiscible with water, and the catalyst is a solid base catalyst; 2, adding 1, 2-propylene glycol into the reactor in a dropwise manner, and controlling the reaction temperature at 65-95 DEG C; 3, after the reaction is finished, separating the liquid to obtain a water layer and a crude product layer, and dewatering and filteringthe crude product layer to obtain a crude product; and 4, adding a polymerization inhibitor into the crude product, and carrying out reduced pressure rectification purification to obtain a pure product, ie., the 4-methyl-1, 3-dioxolane. According to the invention, the method has the following advantages that the purification difficulty is low, the byproducts are few, and the yield is high; the environmental affinity is good, and the national sustainable development policy is met; the waste is little, the treatment is easy, the process route is simple, the reaction is easy to control, and the method is suitable for industrial production; and the product purity is high and can reach more than 99.5%, and the water content is low.
