Alkylation product separation method, alkylation reaction separation method and alkylation reaction separation device

A technology for an alkylation reaction and a separation method, which is applied in the field of the separation method and separation device of the alkylation reaction products of low-carbon olefins and alkanes, can solve problems such as inability to effectively recover and utilize, and achieves remarkable energy saving effect, easy control, and reduction of steam. The effect of the total amount
CN110876855AActive Publication Date: 2020-03-13CHINA PETROLEUM & CHEM CORP +1
7 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2020-03-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an alkylation product separation method. According to the method, a liquid-phase alkylation product is pressurized by an optional booster pump; the pressurized liquid-phase alkylation product is introduced into a first heat exchanger, and is subjected to heat exchange with a gas-phase material from a high-pressure fractionating tower; the heat exchanged material is furtherheated to 100-180 DEG C in a second heat exchanger; the heated material enters the high-pressure fractionating tower, and is fractionated under a condition of 2.0-6.0 MPa; the gas-phase material at the top of the high-pressure fractionating tower is subjected to heat exchange with the liquid-phase alkylation product; the liquid-phase material at the bottom of the high-pressure fractionating towerenters a low-pressure fractionating tower and is fractionated under a condition of 0.2-1.0 MPa; low-carbon alkane is obtained at the top of the low-pressure fractionating tower, and an alkylation oilproduct is obtained at the bottom of the low-pressure fractionating tower; and the low-pressure fractionating tower is provided with an intermediate reboiler, and the gas-phase material at the top ofthe high-pressure fractionating tower after heat exchange of the first heat exchanger is used as a heat source of the intermediate reboiler. The method provided by the invention can improve the heat utilization efficiency and reduce the separation operation energy consumption in the alkylation process.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a mixture separation method and a separation device, more specifically, to a separation method and a separation device for alkylation reaction products of light olefins and alkanes. Background technique

[0002] Alkylate is a clean, high-octane gasoline blending component. Under the action of strong acid, isoparaffins (mainly isobutane) and alkenes (C 3 ~C 5 Alkenes) react to produce alkylate. Alkylation technology can be divided into liquid acid alkylation and solid acid alkylation according to the form of catalyst. The alkylation reaction of olefins and alkanes is very complicated. The main reaction is the addition reaction of olefins and alkanes, but at the same time there are various side reactions, mainly the superposition of olefins and the cracking of macromolecules. In order to increase the concentration of the reactant isobutane and suppress the occurrence of side reactions such as superposition of olefins, it is n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More