4 results about "Amyl ether" patented technology

The invention discloses a heat integration heat pump assisted extractive distillation separation methanol ether water azeotrope, which is characterized in that a methanol-methyl tert-amyl ether-water mixed solution is separated through three-tower operation of an extraction reduced pressure distillation tower T1, an extraction distillation tower T2 and a solvent recovery reduced pressure distillation tower T3. Tower top steam of the extractive distillation tower T2 is used for exchanging heat for part of liquid phase of a middle plate of the extractive decompression distillation tower T1, the problem that traditional heat integration cannot be achieved due to the fact that the tower top temperature of the extractive distillation tower T2 is between the tower top temperature of the extractive decompression distillation tower T1 and the tower kettle temperature is solved, and a novel heat integration strengthening process is developed. According to the process, heat energy is fully utilized, and energy consumption and equipment cost are reduced. And the adopted extracting agent dimethyl sulfoxide is small in dosage, relatively weak in volatility, small in extracting agent loss, easy to recover and environment-friendly. The purity of separated methanol is greater than 99.9%, the yield is greater than 99.9%, the purity of methyl tert-amyl ether is greater than 99.9%, the yield is greater than 99.9%, the purity of water is greater than 99.9%, the yield is greater than 99.9%, and the purity of mixed extraction agents dimethyl sulfoxide and ethylene glycol is greater than 99.9%, and the yield is greater than 99.9%.

This invention discloses a method for producing isopentenene by cracking methyl tert-amyl ether. The method includes: mixing the methyl tert-amyl ether cracking reaction product with a certain amount of water to obtain a mixture; separating the mixture into oil and water, with the separated aqueous phase entering a methanol recovery tower and the separated crude isopentenene phase entering a water washing tower for washing; the washed crude isopentenene phase entering an isomerization reactor from the top of the water washing tower to convert 2-methyl-1-butene to 2-methyl-2-butene, and then entering an isopentenene refining tower for product refining to produce qualified isopentenene product; the bottom material of the water washing tower entering the methanol recovery tower; the methanol at the top of the methanol recovery tower being reused, and the fresh water obtained at the bottom being reused. This invention removes most of the methanol from the reaction product through oil-water separation, reducing the amount of subsequent water used for washing, thereby reducing the throughput of the methanol recovery tower and achieving the goal of reducing the operating cost of the equipment.

The present application relates to a kind of cracking catalyst and its preparation method and application, belong to the technical field of catalyst.Solve the problem in prior art, using the cracking catalyst sold in market to carry out methyl tert-amyl ether cracking reaction, the activity of cracking catalyst is relatively low, the content of 2-methyl-2-butene in product is relatively low, the yield of isoamylene is low, and increase the separation energy consumption problem.The cracking catalyst of the present application includes amorphous aluminum silicate and inert carrier, amorphous aluminum silicate is prepared by step-by-step precipitation, and the inert carrier is selected from one or more of Al2O3, SiO2, activated carbon material.The cracking catalyst has the advantages of high reactivity, long service life, and can be applied in catalytic methyl tert-amyl ether cracking to prepare isoamylene, the content of 2-methyl-2-butene in product is high, and the separation energy consumption can be saved.

The invention relates to a method for producing tert-amyl ethyl ether through heterogeneous auxiliary reaction extraction and pressure swing distillation. A reactive distillation tower T1, a first extractive distillation tower T2, a second extractive distillation tower T3 and an extraction agent recovery tower T4 are connected in series for operation, ionic liquid is used as an extraction agent, azeotropy between systems is broken under the action of the extraction agent, and reaction and separation of a tert-amyl alcohol-ethanol-ethyl tert-amyl ether-water multi-element azeotropic system are achieved. According to the method disclosed by the invention, on the premise of breaking the complex azeotropic behavior between systems, the energy consumption is further reduced, the purity of the product ethyl tert-amyl ether is improved, and the equipment cost is reduced. The purity of separated tert-amyl alcohol is greater than 99.9%, ethanol is completely reacted, the purity of water is greater than 99.9%, the purity of ethyl tert-amyl ether is greater than 99.9%, and the purity of extraction is greater than 99.9%. The adopted extracting agent ionic liquid is less in dosage, relatively weak in volatility, less in loss, easy to recover and environment-friendly.