A kind of preparation method of oxidized microcrystalline wax

Abstract

The invention provides a preparation method of oxidized microcrystalline wax. The method comprises the following steps: a rotary bed reactor is adopted as reaction equipment, wherein the rotary bed is composed of an anti-corrosion frame and a bed layer which is composed of a catalyst filling material; and microcrystalline wax is adopted as a raw material, and is subjected to an oxidation reaction under the existence of air. The catalyst is potassium permanganate loaded on active carbon. The air contains a 50-150mL / L HCl water solution. With the method, continuous production can be realized; reaction temperature is low; reaction activity is high; and target product yield is high.

Description

technical field [0001] The invention relates to a preparation method of oxidized microcrystalline wax, which belongs to the technical field of wax oxidation technology. Background technique [0002] In recent years, with the demand for special waxes in all walks of life, chemical modification of microcrystalline waxes by oxidation methods to obtain modified waxes with higher added value has received widespread attention. Because microcrystalline wax has many excellent properties such as good emulsification, pigment dispersion, lubricity, oil solubility, and glazing after oxidation, and also improves the flexibility of raw wax, so oxidized microcrystalline wax is synthetically biodegradable. Materials, textiles, metalworking, thermoplastic resins, ceramics, lubricants, inks, metal surface treatment, ore flotation, automotive glazing, coatings, explosives, molding, leather, etc. have been widely used. [0003] Before the 1980s, the catalysts used in the oxidation of microcrys...

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Problems solved by technology

[0003] Before the 1980s, the catalysts used in the oxidation of microcrystalline wax mainly used high-priced transition metal soap mixtures with air to produce fatty acids, but the catalyst regeneration effect was not ideal, and these catalysts would form some by-products and metal residues, and not easily removed from the product

[0004] CN102921447A proposes a method for preparing a paraffin catalyst with SPA-15 as a carrier and cobalt nitrate as an active component. Although SPA-15 has a very high pore radius, its chemical reactivity is not high, which greatly limits its Practical application range; in addition, the content of isomeric hydrocarbons in the composition of microcrystalline wax is as high as 90%, and the molecular weight is much larger than that of paraffin wax. Moreover, isomeric hydrocarbons are far more difficult to oxidize than straight chain hydrocarbons. Therefore, the above patent catalysts are not suitable for microcrystalline oxidation of wax

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