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公开(公告)号：US20220401943A1
公开(公告)日：2022-12-22
申请号：US17775516
申请日：2020-11-09
摘要： Disclosed are a catalyst pre-hydrocarbon-pooling method and a pre-hydrocarbon-pooling device, relating to the technical field of preparation of low carbon olefins. A regenerated catalyst enters a pre-hydrocarbon-pooling reactor, and a pre-hydrocarbon-pooling reaction occurs between the regenerated catalyst and an activation medium to form “hydrocarbon pool” active species. “Pre-hydrocarbon-pooling” treatment is performed on the regenerated catalyst by providing a pre-hydrocarbon-pooling device, so that the regenerated catalyst forms the “hydrocarbon pooled” active species and carbon deposition before entering into an oxygenate conversion reactor, by way of which “hydrocarbon pool” active species distribution and coke distribution of the catalyst in the conversion reactor are improved. This shortens or eliminates a reaction “induction period” and improves the catalytic activity and selectivity of the regenerated catalyst for a reaction of an oxygenate to low-carbon olefins.
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2.发明申请公开(公告)号：US20220289643A1
公开(公告)日：2022-09-15
申请号：US17775519
申请日：2020-11-09
摘要： Provided is a method for improving the selectivity of conversion of an oxygenate to low-carbon olefins. A regenerated catalyst from a regenerator enters a pre-hydrocarbon-pooling device where it comes into contact with an activation medium to undergo a pre-hydrocarbon-pooling reaction, forming “hydrocarbon pool” active species. The pre-hydrocarbon-pooled regenerated catalyst leaving the pre-hydrocarbon-pooling device enters a conversion reactor for recycling. By providing the pre-hydrocarbon-pooling device, and performing “pre-hydrocarbon-pooling” treatment on the regenerated catalyst, the regenerated catalyst is enabled to form “hydrocarbon pool” active species and carbon deposition before entering the conversion reactor. This improves the distribution of “hydrocarbon pool” active species and carbon deposition of the catalyst in the conversion reactor, thereby shortening or eliminating the “induction period” of the conversion reaction, and improving the catalytic activity and selectivity of the regenerated catalyst for a conversion of an oxygenate to low-carbon olefins.
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