Processes and systems for using silica particles in fluid bed reactor
AssigneeAscend Performance Materials Operations LLC
InventorsYawu T. Chi, James Sutton, Ali Akhavan, Celia L. Kniepmann, Matthew D. Cox, Valerie S. Monical
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Abstract
The present disclosure relates to fluid bed processes that utilize silica particles as a fluidization aid. The process comprises reacting one or more reactants in a reactor comprising a fluid bed to form a product. The fluid bed comprises a catalyst composition comprising a catalyst and an inert additive composition comprising silica particles from 0.5 wt % to 30 wt %, based on the total weight of the catalyst composition. The silica particles are discrete, inert particles that are mixed with the catalyst in the fluid bed.
Claims24
A process comprising:
- reacting one or more reactants in a reactor comprising a fluid bed to form a product;
- wherein the one or more reactants are passed upwardly through the fluid bed,
- wherein the fluid bed comprises a catalyst composition comprising a catalyst and an inert additive composition comprising from 0.5 wt % to 30 wt % of silica particles, based on the total weight of the catalyst composition,
- wherein the silica particles have an equivalent median particle diameter ranging from 10 microns to 500 microns,
- wherein a difference between the density of the silica particles and catalyst particles ranges from 0.5% to 75%,
- wherein the silica particles have a real density ranging from 1.8 g/cm3 to 2.8 g/cm3.
A process for producing acrylonitrile product, the process comprising:
- reacting one or more reactants in a reactor comprising a fluid bed to form acrylonitrile;
- wherein the one or more reactants are passed upwardly through the fluid bed,
- wherein the fluid bed comprises a catalyst composition comprising a catalyst and an inert additive composition comprising silica particles having a density from 1.8 g/cm3 to 2.8 g/cm3,
- wherein the silica particles have a sphericity ranging from 60% to 99.9%.
A reactor system for preparing acrylonitrile, comprising:
- a fluid bed comprising a catalyst composition comprising a catalyst and an inert additive composition comprising from 0.5 wt % to 30 wt % of silica particles, based on the total weight of the catalyst composition;
- and
- one or more gas inlet feeds for passing one or more reactants upwardly through the fluid bed to form acrylonitrile,
- wherein the difference between the density of the silica particles and the catalyst particles ranges from 0.5% to 75%,
- wherein the silica particles reduce erosion of the reactor by greater than 10% compared to a process conducted without from 0.5 wt % to 30 wt % silica particles,
- wherein the silica particles have a real density ranging from 1.8 g/cm3 to 2.8 g/cm3.
A reactor system for preparing acrylonitrile, comprising:
- a fluid bed comprising a catalyst composition comprising a catalyst and an inert additive composition comprising from 0.5 wt % to 30 wt % of silica particles, based on the total weight of the catalyst composition;
- and
- one or more gas inlet feeds for passing one or more reactants upwardly through the fluid bed to form acrylonitrile,
- wherein the difference between the density of the silica particles and the catalyst particles ranges from 0.5% to 75%,
- wherein the silica particles reduce erosion of the reactor by greater than 10% compared to a process conducted without from 0.5 wt % to 30 wt % silica particles,
- wherein the silica particles have a sphericity ranging from 60% to 99.9%.
Dependencies are inferred from the claim text.