Sinopec has been granted an invention patent: “Device and method for producing foaming agent raw materials from pentane fractions in catalytic reforming units””
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According to data from the Tianyancha app, Sinopec (600028) has obtained a new invention patent grant. The title of the patent is “Device and method for producing foaming agent raw materials from pentane fractions in catalytic reforming units”; the patent application number is CN202311234370.7, and the grant date is November 4, 2025. Patent Abstract: The present invention discloses an apparatus and method for producing a foaming agent from pentane fractions in a catalytic reforming unit. The reformed feed oil enters the depentanizer column, where a C4/C5 fraction is obtained at the top of the column; a pentane-containing fraction is drawn off from an upper side stream ； The pentane-containing fraction obtained is fed into a pentane hydrogenation reactor for hydrogenation; the hydrogenation product, after being mixed with the low-temperature naphtha from the separator tower of the reforming pre-hydrogenation unit, is returned to the upper part of the depentanization tower ； The resulting C4/C5 fraction is subjected to gas-liquid separation to yield a liquid product that is divided into two streams. One of these streams is mixed with the low-temperature naphtha from the top of the separation column of the optional reforming pre-hydrogenation unit before being fed into the C4/C5 distillation column, while the other stream is returned to reflux inlet II of the pentane removal column. The method of the present invention significantly simplifies the hydrogenation process for pentane fractions, reducing plant investment and operating costs. Since the beginning of this year, Sinopec has obtained 3,802 new patent approvals, a 8.32% decrease compared to the same period last year. Based on the company’s financial figures for the first half of 2025, the company invested 6.186 billion yuan in research and development during this period, representing a 3.05% increase compared to the previous year.
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