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60 results about "TERPINYL ACETATE" patented technology

Method for preparing terpinyl acetate

The invention relates to a method for preparing terpinyl acetate, comprising: terpilenol and acetic anhydride are respectively added into a reaction kettle to be stirred, the mixture is added with phosphoric acid to be evenly stirred and then added with SnCl4.5H2O at the room temperature until the SnCl4.5H2O is completely dissolved, and the reaction is carried out under agitation while the temperature gradually raises; the reaction liquid is cooled to be room temperature and added with Na2CO3 to neutralize H3PO4 and SnCl4, and is directly distilled after being neutralized by carbonic acid, so that most acetic acid is evaporated; reaction product is washed by 10% of NaOH solution and saturated saline solution to remove the residual acetic acid until neutrality and then processed by fractionation, so that the terpinyl acetate is obtained. The method has the advantages of providing a novel composite catalyst system and a new technique for synthesizing the terpinyl acetate, being low in cost and simple in post treatment and having higher catalytic activity and reaction selectivity. The method also can ensure the yield of terpinyl acetate, shorten the reaction time, reduce the wastewater in the production and improve the recovery rate of acetic acid byproduct and the concentration of acetic acid.
Owner:NANJING FORESTRY UNIV

Method for synthesizing terpinyl acetate from turpentine oil

The invention discloses a method for synthesizing terpinyl acetate from turpentine oil, wherein the turpentine oil, glacial acetic acid and a catalyst are added into a reaction kettle, and heating andstirring are started; after the reaction is finished, a reaction liquid is transferred into a freezing tank for freezing to crystallize and precipitate unreacted acetic acid crystal in the systerm; the precipitated acetic acid crystal is centrifuged, the centrifuged acetic acid crystal is used as a raw material for the next reaction, and centrate is mixed with the reaction liquid; the liquid mixture is added to a distillation pot, water is added, stirring and heating are started, a product is accompanied by water vapor to enter an oil-water separator for separation, a separated oil layer is transported to a water washing tank, and lower layer water is returned to the distillation pot; water is added into the water washing tank for washing to obtain crude terpinyl acetate; the crude terpinyl acetate is fractionated to obtain a side product and a high purity terpinyl acetate product. The method not only can promote the conversion of pinene to the target product, pine oil ester, and improves the purity of the product, and has the advantages of simple process, less emission of three wastes, low cost, greenness, environmental protection and the like, and industrial production is easy to realize.
Owner:GUANGXI FORESTRY RES INST
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