Straight-chain olefin production method capable of being monitored on line

A technology of linear olefins and production methods, which is applied in the processing of hydrocarbon oil, instruments, measuring devices, etc. It can solve the problems of small application range of detection samples, large deviation of olefin detection repeatability and reproducibility, and achieve product quality control , to achieve rapid response and reduce the effect of the pre-processing process

CN111647424APending Publication Date: 2020-09-11INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-09-11

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Abstract

The invention relates to a straight-chain olefin production method capable of being monitored on line. Coal-based Fischer-Tropsch synthetic oil serving as a raw material undergoes deacidification, fraction cutting, oxygen-containing compound removal, alkene separation and isomer separation so as to obtain a polymer-grade olefin product with the olefin carbon number N ranging from 4 to 18; and in the production process, the contents of olefin, alkane and alkyne in the raw material are measured in real time by adopting an online mid-infrared spectrometer, and the operation conditions of each process step are adjusted in real time according to the detection result. The method can be used for producing the straight-chain olefin with high efficiency, low energy consumption, high response speedand high product purity.
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Description

technical field

[0001] The invention relates to a production method of linear olefins capable of on-line monitoring, in particular to a production method for real-time determination of the content of olefins, alkanes and alkynes and corresponding adjustment of operating conditions. Background technique

[0002] Fischer-Tropsch synthetic oil products contain a large amount of valuable chemical raw materials - olefins, which are key raw materials for the production of other fine chemical products and have an extremely significant impact on their downstream industries.

[0003] At present, domestic and foreign follow-up processing methods for Fischer-Tropsch synthetic oil products mainly focus on distillation and rectification.

[0004] Patents US7217852 and US7294253 proposed a distillation method for Fischer-Tropsch synthetic oil and the middle distillate oil obtained by distillation. The middle distillate oil contains branched chains such as methyl, ethyl, and propyl groups,...

Examples

Embodiment 1-11

[0107] The treatment methods of Examples 1-11 are basically the same, but the operating parameters are slightly different, and the relevant step parameters are shown in Table 4.

[0108] Table 4 embodiment 1-10 target olefin carbon number and process parameters

[0109]