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Method for synthesizing MTBE (methyl tert-butyl ether) by reaction of mixed C4 with low isobutene content and methanol

A technology of mixing C4 and isobutene, which is used in the addition of unsaturated compounds to prepare ether, chemical industry, climate sustainability, etc. It can solve the problem that the conversion rate of isobutene and the purity of MTBE cannot meet the requirements, and the effect of the purifier cannot be controlled. , increase the load of downstream process units, etc., to achieve the effects of low cost, small load and extended life

Inactive Publication Date: 2012-10-03
CHANGLING PETRO CHEM ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the above, it can be seen that the design of this process still has the following deficiencies: ① Separation of light and heavy will increase the energy consumption and investment of the device, and will inevitably cause some isobutene loss
② There is no way to control the effect of the purifier. Once the effect of the purifier is not guaranteed, the load of the downstream process unit will be increased, so that the conversion rate of isobutylene and the purity of MTBE of the device cannot meet the requirements.

Method used

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  • Method for synthesizing MTBE (methyl tert-butyl ether) by reaction of mixed C4 with low isobutene content and methanol
  • Method for synthesizing MTBE (methyl tert-butyl ether) by reaction of mixed C4 with low isobutene content and methanol
  • Method for synthesizing MTBE (methyl tert-butyl ether) by reaction of mixed C4 with low isobutene content and methanol

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Embodiment 1

[0018] According to 27.42t / h, the low isobutene content of 10.64wt% mixed carbon four (1) and 1.67t / h methanol (2) are mixed through the carbon four-methanol mixer (3), and then passed through the reaction feed heat exchanger ( 4) Heat to 30-50°C, enter the pre-etherification reactor (5) from the upper part, the pre-etherification reactor D006 catalyst loading capacity is 12.26t, set 2-3 fixed bed catalyst beds, and the space velocity is 2.23h -1 , remove the alkali and alkali metal ions in it, then cool down to 30-50°C through the reaction intercooler (6) and then enter the etherification reactor (7). The etherification reactor D006 has a catalyst loading of 26.5t. 2-3 layers of fixed bed catalyst bed are set in the device, and the space velocity is 1.03 h -1 , the reaction product after the reaction in the etherification reactor (7) and the MTBE product enter the catalytic distillation tower (9) after heat exchange through the catalytic distillation tower feed-MTBE product h...

Embodiment 2

[0021] According to 34.47t / h, the low isobutene content of 15.08wt% mixed carbon four (1) and 2.97t / h methanol (2) are mixed through the carbon four-methanol mixer (3), and then passed through the reaction feed heat exchanger ( 4) Heat to 30-50°C, enter the pre-etherification reactor (5) from the upper part, the pre-etherification reactor D006 catalyst loading capacity is 12.26t, set 2-3 fixed bed catalyst beds, and the space velocity is 2.81 h -1 , remove the alkali and alkali metal ions in it, then cool down to 30-50°C through the reaction intercooler (6) and then enter the etherification reactor (7). The etherification reactor D006 has a catalyst loading of 26.5t. 2-3 layers of fixed bed catalyst bed are set in the device, and the space velocity is 1.30 h -1 , the reaction product after the reaction in the etherification reactor (7) and the MTBE product enter the catalytic distillation tower (9) after heat exchange through the catalytic distillation tower feed-MTBE product ...

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Abstract

The invention relates to a method for synthesizing MTBE (methyl tert-butyl ether) by the reaction of mixed C4 with a low isobutene content and methanol, which comprises the following steps: 1, pre-etherification reaction: the mixed C4 containing 10-15wt% of isobutene and the methanol are fully mixed by a static mixer according to the molecular ratio of isobutene to methanol of (1:1)-(1:1.1), and then the mixture enters a pre-etherification reactor provided with a fixed bed catalyst bed layer for pre-etherification; 2, etherification reaction: material coming out of the pre-etherification reactor enters an etherification reactor provided with a fixed bed catalyst bed layer for etherification, wherein the conversion rate of the isobutene at an outlet of the etherification reactor is larger than or equal to 90%; and 3, product separation and purification: material coming out of the etherification reactor enters a catalytic distillation tower for further reaction and separation, the upper part of the catalytic distillation tower is provided with a catalyst bed layer, and an MTBE product is produced at the lower part of the catalytic distillation tower. Compared with the prior art, the method disclosed by the invention has the characteristics that a weight separation tower is eliminated, the loss of the isobutene in weight separation is avoided, and the yield of the MTBE product is improved.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and in particular relates to a method for synthesizing MTBE by reacting mixed C4 and methanol with low isobutene content. Background technique [0002] MTBE (methyl tert-butyl ether) has the characteristics of high octane number and low vapor pressure, and is an oxygen carrier, has low atmospheric activity, can significantly reduce CO and unburned hydrocarbon emissions, and is an ideal product It is the main method of industrial production to produce MTBE from isobutene and methanol in C4 as raw materials for oil blending components. [0003] At present, the main method of producing methyl tert-butyl ether (MTBE) by mixing C4 with low isobutene content is: the mixed C4 containing isobutene is separated from light to heavy and fully mixed with methanol through a static mixer, and the mixed raw material is preheated by a feed heater Then enter the purifier equipped with cation exchange resin cat...

Claims

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Application Information

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IPC IPC(8): C07C43/04C07C41/06
CPCY02P20/10
Inventor 李建李根忠蔡国球李代玉国歌
Owner CHANGLING PETRO CHEM ENG DESIGN
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