Catalytic conversion process for increasing output of diesel oil and low-carbon olefin
A catalytic conversion method and low-carbon olefin technology, applied in catalytic cracking, chemical instruments and methods, cracking, etc., can solve problems such as product distribution and product properties, affecting the economic benefits of catalytic cracking units, and flexible adjustment of injection volume. Achieve the effects of easy implementation, uniform radial distribution, and improved reaction selectivity
Inactive Publication Date: 2004-10-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0006] The common point of the above background technologies is that the gasoline fraction undergoes catalytic conversion reaction at the bottom of the riser, and its reaction conditions are difficult to be flexibly adjusted according to the physicochemical properties of the gasoline fraction and its injection volume
This will inevitably have adverse effects on product distribution and product properties, which will further affect the economic benefits of the entire catalytic cracking unit
Method used
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Effect test
Embodiment 1
[0026] This example illustrates that the method provided by the present invention can lead to improved product distribution.
[0027] The catalyst used in this example is industrially produced by the Catalyst Factory of Qilu Petrochemical Company, the trade name is RDG-1, and its main physicochemical properties are listed in Table 1. The properties of the raw oil are listed in Table 2. The test was carried out on a catalytic cracking medium-sized unit with a processing capacity of 0.24t / d. For the schematic flow chart of the unit, see the attached figure 2 .
[0028]The main test steps are as follows: the high-temperature regenerated catalyst from the regenerator enters the pre-lift pipe 1 through the regenerated catalyst feeding pipe 9, and is accelerated to flow upward under the action of the pre-lift steam; 50% by weight of the regenerated catalyst enters through the frustum-shaped transition section 2 In the inner conveying pipe 4, and continue to flow upward under the ...
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A catalytic transform process for increasing the outupt of diesel oil and low-carbon olefin features that the regenerator (20-80 wt.%) comes into internal delivery tube via transition segment, the rest of catalyst is fed in ring cavity via hole of the said transition segment, the gasoline is fed in the said ring cavity containing catalyst for reaction, the mixture from ring cavity, the catalyst from internal delivery tube, and the crude hydrocarbon oil are in contact with each other in upper part of external delivery tube for reaction, the oil-gas is separated, and the catalyst is regenerated. Its advantage is high output rate of targent product.
Description
technical field [0001] The invention belongs to the catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, more specifically, a catalytic conversion method for increasing the production of diesel oil and liquefied gas. Background technique [0002] The rise of crude oil prices in the world has seriously affected the survival and development of oil refining enterprises. The oil refining industry can only rely on scale benefits and technological progress to seek development. From a long-term point of view, catalytic cracking will still be one of the main means of producing gasoline fuel, and the demand for diesel and chemical raw materials, such as gas olefins and aromatics, will also promote the development of catalytic cracking process. [0003] CN1160746A injects low-quality gasoline fractions such as straight-run gasoline and coker gasoline into the bottom of the riser, making them preferentially contact with high-temperature regenerated catalyst...
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IPC IPC(8): B01J8/12C10G11/00
Inventor 侯栓弟许克家钟孝湘张瑞驰李松年武雪峰张执刚何峻
Owner CHINA PETROLEUM & CHEM CORP