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Sulfuric acid alkylation reaction method and device and heat removal method for sulfuric acid alkylation reaction

An alkylation reactor and a technology for the reaction, which are applied in the alkylation treatment, hydrocarbon oil treatment, petroleum industry, etc., can solve problems such as self-circulation, increase the ratio of alkene to olefin, reduce the amount of circulating light hydrocarbons, and reduce the effect of investment

Pending Publication Date: 2022-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process removes the heat of reaction through technical means such as vaporization heat extraction and compression refrigeration, there are still several problems: the light hydrocarbon gas phase obtained from hydrocarbon self-vaporization does not return to the reaction unit, and part of the gas phase is self-circulating in the compressor system
The reaction product contains a large amount of n- / isobutane, causing the energy consumption of the fractionation unit to account for more than 60% of the total energy consumption of the device

Method used

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  • Sulfuric acid alkylation reaction method and device and heat removal method for sulfuric acid alkylation reaction
  • Sulfuric acid alkylation reaction method and device and heat removal method for sulfuric acid alkylation reaction
  • Sulfuric acid alkylation reaction method and device and heat removal method for sulfuric acid alkylation reaction

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Experimental program
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Effect test

Embodiment 1

[0080] use figure 1 Shown sulfuric acid method alkylation reaction method and device, as figure 1 As shown, the C4 raw material passes through the pipeline 21 to exchange heat with the reaction product, then dehydrates in the dehydration tank 2, mixes with the circulating isobutane from the pipeline 37, and then enters the alkylation reactor 3. Under the action of sulfuric acid, the butene and isobutane in the feed react to generate alkylate, and the reaction liquid phase flows into the acid hydrocarbon primary separator 4 through the pipeline 23, and the separated sulfuric acid is recycled as a circulating acid; The crude reaction product is divided into two parts, one part is returned to the alkylation reactor through pipeline 24 as circulating hydrocarbon, and the other part enters the reaction product flash tank 8 through pipeline 28 after heat exchange, and the separated light hydrocarbon component is passed through The pipeline 29 returns to the primary inlet of the air...

Embodiment 2

[0085] The flow process of sulfuric acid alkylation reaction method is the same as embodiment 1.

[0086] Sulfuric Acid Alkylation Reaction Method C4 Feedstock B. See Table 2 for the main operating conditions of the alkylation reactor, Table 3 for the amount of circulating refrigerant treated by the compressor, and Table 4-1 and Table 4-2 for the processing capacity and product composition of the product separation unit. The product separation equipment includes a de-butanizer and a de-butanizer, and the main structural parameters are shown in Table 5. See Table 6 for public works material consumption.

Embodiment 3

[0088] use figure 2 In the shown sulfuric acid alkylation reaction device and method, the air compressor system adopts a two-stage gas compression system. The difference from Embodiment 1 is that the crude reaction product enters the flash tank 8 for gas-liquid separation, and the separated light hydrocarbon components are directly returned to the secondary inlet of the compressor through the pipeline 29 .

[0089] For sulfuric acid alkylation reaction method C4 raw material A, see Table 2 for the main operating conditions of the alkylation reactor, see Table 3 for the amount of circulating refrigerant treated by the compressor, and see Table 4-1 for the processing capacity and product composition of the product fractionation unit. 4-2. The product separation equipment includes a de-butanizer and a de-butanizer, and the main structural parameters are shown in Table 5. See Table 6 for public works material consumption.

[0090] Table 1 C4 raw material composition

[0091] ...

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Abstract

The invention relates to a sulfuric acid alkylation reaction method, a sulfuric acid alkylation reaction device and a sulfuric acid alkylation reaction heat removal method, and the sulfuric acid alkylation reaction method comprises the following steps: a C4 raw material enters an alkylation reactor, isobutane and butylene are subjected to an alkylation reaction under the action of a sulfuric acid catalyst, a reaction material flow is subjected to gas-liquid separation to obtain light hydrocarbon and a liquid phase material flow, the light hydrocarbon enters a gas compressor system to serve as a refrigerant, a liquid-phase material flow enters an acid-hydrocarbon first-stage separator, separated sulfuric acid returns to the alkylation reactor to be recycled, separated crude reaction products enter a product fractionation unit after being subjected to acid-hydrocarbon second-stage separation to remove trace acid, and iso-butane, n-butane and alkylated oil products are obtained through further separation; wherein the separated isobutane returns to the alkylation reactor for continuous reaction. According to the sulfuric acid alkylation reaction method, the sulfuric acid alkylation reaction device and the heat extraction method, the total energy consumption of the alkylation reaction device is remarkably reduced, and the equipment investment is reduced.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a sulfuric acid alkylation reaction method and device. [0002] technical background [0003] With the vigorous development of various domestic industries and the increasing emphasis on environmental protection, gasoline upgrading has become one of the important issues faced by major domestic oil companies. Alkylated gasoline is obtained through the alkylation reaction of isobutane and olefins. It does not contain impurities such as aromatics, sulfur and olefins, and has a high octane number. Alkylated gasoline is an ideal clean gasoline blending component in terms of anti-knock performance, aromatics content, olefin content, and sulfur content. [0004] Alkylation technology includes liquid acid alkylation technology and solid acid alkylation technology. Four kinds of catalysts are mainly used: sulfuric acid, hydrofluoric acid, solid acid and ionic liquid. Alkylation with ...

Claims

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Application Information

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IPC IPC(8): C10G57/00
CPCC10G57/005C10G2300/4006C10G2300/4012C10G2300/70
Inventor 田雅楠栗万博师峰赵志海
Owner CHINA PETROLEUM & CHEM CORP
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