Reaction method and device for preparing hydrocarbon products from methyl alcohol
A hydrocarbon product and reaction technology, applied in the field of fluidized bed methanol to hydrocarbon technology reaction, can solve the problems of difficult control of reaction termination, uncertain actual reaction time, increased side reactions, etc., to reduce the occurrence of side reactions and reduce losses , to avoid the broken effect
Active Publication Date: 2016-10-26
石宝珍
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Problems solved by technology
In order to control the discharge of catalyst and improve the catalyst recovery of the cyclone separator, it is necessary to leave a long distance between the reaction fluidized bed and the inlet of the gas-solid separation equipment to allow the carried catalyst to settle and reduce the amount of carried catalyst. During this period, the catalyst naturally exists The continuous contact reaction with the gas medium makes it difficult to control the termination of the reaction in the fluidized bed reaction process, and the actual reaction time is uncertain, resulting in increased side reactions
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Embodiment
[0044] Methanol to olefins reaction. The methanol feed is 1.8 million tons / year, and the products are ethylene and propylene.
[0045] Reaction conditions and device parameters:
[0046] Reaction time, 2.5 seconds, reaction temperature 495°C, reaction pressure 0.13MPaG, fluidized bed gas superficial velocity 0.8 m / s, gas residence time from the fluidized bed layer to the center of the cyclone inlet of the catalyst pre-separator 4 seconds, catalyst in and out The capacity is 80 tons / hour, the height of the fluidized bed catalyst bed is 2 meters above the feed distributor; the height above the feed distributor of the fluidized bed reactor is 4 meters, and the gas after the reaction is quickly gathered and drawn out from the lower edge of the cone. m, after the reaction, the gas is quickly gathered and the flow rate of the gas delivery pipe is 12 m / s; a catalyst pre-separator is installed, the gas flow rate of the cyclone inlet of the catalyst pre-separator is 5 m / s, and the out...
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The invention discloses a reaction method and device for preparing hydrocarbon products from methyl alcohol. A fluidized bed reactor is adopted; reaction gas is rapidly gathered and led out, so reaction is stopped rapidly in a forced mode, and side reactions are reduced; through the reasonable distribution of pre-separation and cyclone separation combined catalyst separation, catalyst breakage in gas-solid separation is reduced; recovered catalyst of catalyst separation is conveyed in an overflow mode, and catalyst breakage of the conveying link is avoided; finally, loss of catalyst is reduced.
Description
technical field [0001] The invention relates to a technical reaction method for producing hydrocarbons from fluidized bed methanol, and is especially suitable for a reaction process in which the price of a catalyst is high, the catalyst needs to be controlled to be less broken, and the catalyst is less discharged. Background technique [0002] The production of olefins or aromatics from methanol is an important process technology of coal chemical industry, which has been highly valued by various countries. Many reactions of producing olefins or aromatics from methanol use gas-solid fluidized bed or circulating fluidized bed reactors. [0003] The current methanol-to-hydrocarbon product technologies, such as DMTO, SMTO, FMTP, and FMTA, adopt fluidized bed reaction technology, and the catalysts used are microspheres with an average diameter of about 50-60 microns. The fluidized bed methanol to olefins reaction engineering currently draws a lot from FCC technology. However, t...
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Patent Timeline
Login to View More IPC IPC(8): C07C11/04C07C11/06C07C1/20B01J8/24
CPCB01J8/24B01J2208/00017B01J2208/00637C07C1/20C07C11/04C07C11/06Y02P20/584Y02P30/20Y02P30/40
Inventor 石宝珍
Owner 石宝珍