4 results about "Tert-Amyl methyl ether" patented technology

The invention discloses a method for separating a tert-amyl methyl ether-methanol-water azeotropic system by pressure swing extractive distillation through two different mixed entrainers on the basis of a heat pump technical process strengthening scheme. Through three-tower operation of an extraction vacuum distillation tower T1, an extraction vacuum distillation tower T2 and a solvent recovery tower T3, a methyl tert-amyl ether-methanol-water azeotropic mixed solution is separated, the purity of separated methyl tert-amyl ether is greater than 99.9%, the purity of methanol is greater than 99.9%, the yield is greater than 99.9%, the purity of water is greater than 99.9%, and the yield is greater than 99.9%. A heat pump technology is used as an effective process strengthening means, steam at the top of an extraction decompression rectifying tower T1 circularly enters a compressor to be compressed and heated through the compressor, the compressed steam serves as heat flow to heat cold flow at the bottom of the tower, and the top flow is finally condensed after heat transfer. And the reboiling flow at the bottom of the tower can reach the required reboiling ratio, so that the heat load consumption of the T1 tower is obviously reduced. By applying the method, the process cost and the environmental pollution can be further reduced, and the annual total cost and the gas emission are respectively reduced by 9.19% and 23.55%. According to the process, heat energy is fully utilized, energy consumption is reduced, the purity and the yield of the tert-amyl methyl ether are improved, and the equipment cost is reduced. The adopted mixed entrainer is small in dosage, relatively weak in volatility, small in extraction agent loss, easy to recover and environment-friendly.

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.