Phrcess of coproducing methyl tert-butyl ether and tert-butyl alcohol

Abstract

The invention relates to a production method for co-producing methyl tert-butyl ether and tert-butanol with isobutene and methanol water in the C4 fraction. One of its characteristics is that two products of methyl tert-butyl ether and tert-butanol are co-produced with one set of equipment, which saves energy and saves investment by more than 45% compared with the construction of two sets of equipment; Separation, such as using a large amount of isobutene and a small amount of methanol in methanol water to react preferentially in the front reactor to remove methanol in methanol water, omitting the methanol recovery tower and its supporting equipment commonly used at home and abroad; using a large amount of isobutene and methanol in the middle reactor A small amount of water in the tert-butanol water reacts preferentially to remove the water in the tert-butanol water, which avoids the separation difficulty caused by the azeotropic phenomenon in the tert-butanol water; add methanol in the post-reactor to react the remaining C4 fraction Isobutene, a small amount of isobutene in the C4 fraction is reacted in the catalytic rectification column after supplementing an appropriate amount of methanol and ether to remove a small amount of isobutene.

Description

technical field [0001] The invention relates to a production method of methyl tert-butyl ether and tert-butanol, in particular to a production method of co-producing methyl tert-butyl ether and tert-butanol with isobutene and methanol water in the C4 fraction. Background technique [0002] Both methyl tert-butyl ether (MTBE for short) and tert-butanol (TBA for short) are petrochemical products that can be used as chemical raw materials and gasoline additives. At present, the existing production methods of MTBE at home and abroad generally adopt the "one reverse three towers" production mode, one reverse is the reactor, and the three towers are the azeotropic tower, the extraction tower (also known as the water washing tower) and the methanol recovery Tower (also known as methanol distillation tower). A typical process flow is as follows: [0003] see figure 2 , the C4 fraction and methanol enter the raw material tanks V10 and V11 respectively, and then are pressurized by ...

AI Technical Summary

Problems solved by technology

Its main problem is: the process does not make full use of the chemical reaction between the streams to separate the materials, so that the process is not refined enough, and the equipment and investment are increased.

The unit production process is divided into systems, and the equipment cannot be borrowed from each other. Therefore, it has more equipment than the co-production process and requires a large investment.

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