# US 2015/0147236 A1 · Process for producing an anti-erosion coating on an inner wall of a chamber of a fcc unit and anchoring structure for the production of this coating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0147236 A1 - Document ID: US20150147236A1 - Status: Published application - Kind: A1 - Application number: 14/408,457 - Filed: 2013-06-27 - Published: 2015-05-28 - Earliest claimed: 2012-07-10 - Assignees: Total Raffinage Chimie - Applicants: Total Raffinage Chimie - Inventors: Hubert Simon; Marc Bories - Web page: https://patentgrep.com/patent/US20150147236A1 ## CPC - B01J 8/24: according to "fluidised-bed" technique (B01J8/20 takes precedence) - B01J 8/1872: {Details of the fluidised bed reactor (B01J8/1836 takes precedence)} - B32B 3/12: characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure - B32B 13/06: of metal - B32B 15/043: {of metal (B32B15/01 takes precedence)} - B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} - C10G 11/18: according to the "fluidised-bed" technique - C10G 11/182: {Regeneration} - F23M 5/00: Casings; Linings; Walls - F23M 5/04: Supports for linings - F27D 1/10: Monolithic linings; Supports therefor - F27D 1/141: {Anchors therefor} - B01J 2208/00884: Means for supporting the bed of particles, e.g. grids, bars, perforated plates - B01J 2219/0218: of ceramic - B01J 2219/0236: Metal based - B32B 2255/06: on metal layer - B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion - B32B 2307/752: Corrosion inhibitor - F23M 2900/05002: Means for accommodate thermal expansion of the wall liner - F23M 2900/05004: Special materials for walls or lining - Y02P 10/122: by capturing or storing CO2 - Y10T 29/49618: Restoring existing member, e.g., reinforcing, repairing - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES - F23M: CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A process for producing an anti-erosion coating on an inner or outer metal wall of a chamber of a fluid catalytic cracking unit, comprising: (i) the shaping of a honeycomb metal anchoring structure, said anchoring structure being formed from a plurality of strips connected in pairs by joining assembly portions of these strips so as to form a plurality of cells between two adjacent strips, (ii) the fastening of said anchoring structure by welding to said metal wall, so that each cell of the anchoring structure is welded to the wall of the chamber at least at the junctions between the contiguous assembly portions of two adjacent strips, and (iii) the insertion of a composite material into the cells from the metal wall and at least up to the upper longitudinal edge of each strip. ## Claims ### Claim 1 Process for producing an anti-erosion coating on an inner or outer metal wall of a chamber of a fluid catalytic cracking unit, comprising: (i) shaping a honeycomb metal anchoring structure, said anchoring structure being formed from a plurality of strips connected in pairs so as to form a plurality of cells between two adjacent strips, in which each strip is divided along its length into a plurality of portions, including at least one series of assembly portions extending in a same plane and connected to a series of assembly portions of an adjacent strip by fastening means, each strip having a lower longitudinal edge contained in a single plane before shaping and an upper longitudinal edge, during this shaping step, the lower longitudinal edges of the strips of said anchoring structure being adapted in order to follow the shape of said metal wall, (ii) fastening said anchoring structure to said metal wall, the lower longitudinal edges of the strips of the anchoring structure being in contact with the metal wall, this fastening being carried out by welding to the metal wall of at least one part of the lower longitudinal edges of the strips so that each cell of the anchoring structure is welded to the metal wall at least at the junctions between the contiguous assembly portions of two adjacent strips, and (iii) inserting a composite material into the cells of said anchoring structure from the metal wall and at least up to the upper longitudinal edge of each strip. ### Claim 2 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which at least one of the welds produced during step (ii) at the junction of the contiguous assembly portions of two adjacent strips extends over the entire length of at least one of the strip portions adjacent to the assembly portions. ### Claim 3 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which the strips of the anchoring structure used in step (i) are made of austenitic stainless steel chosen from the following steels: a stainless steel containing from 0.04% to 0.10% by weight of carbon, from 17% to 19% of chromium and from 9% to 12% of nickel, and with a niobium content of from 8 times the carbon content to 1% by weight, a steel containing at most 0.015% by weight of carbon, from 15% to 17% of chromium and from 33% to 37% of nickel, and a steel containing at most 0.10% by weight of carbon, from 24% to 26% of chromium and from 19% to 22% of nickel. ### Claim 4 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which: the anchoring structure used in step (i) is such that the upper longitudinal edge of each strip is formed from a succession of straight sections that are parallel to the lower longitudinal edge, the upper longitudinal edge alternately comprising low sections that are a distance h away from the lower longitudinal edge and high sections that are a distance H, greater than the distance h, away from the lower longitudinal edge, at least one part of the low sections forming the upper edge of at least one part of the assembly portions so that, when two adjacent strips are connected, each assembly portion of a strip comprises an upper longitudinal edge a distance apart from its lower longitudinal edge that is different from the distance separating the upper longitudinal edge from the lower longitudinal edge of the assembly portion of the adjacent strip to which it is connected, over the entire length of the connected assembly portions, and in which: during the step (iii) of inserting the composite material into the cells of said anchoring structure, the composite material fills the cells from the metal wall and at least up to the high sections of the upper longitudinal edges of the strips of the anchoring structure. ### Claim 5 (depends on 4) Process for producing an anti-erosion coating according to claim 4, in which each strip of the anchoring structure used in step (i) is such that the difference H-h between the distances H and h is from 4 to 10 mm, preferably from 6 to 8 mm. ### Claim 6 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which the metal wall is an outer or inner wall of a cyclone, a regenerator, a disengager or any other internal equipment of a fluid catalytic cracking unit. ### Claim 7 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which the composite material is a concrete. ### Claim 8 (depends on 1) Process for producing an anti-erosion coating according to claim 1, in which each strip of the anchoring structure used in step (i) is divided along its length into a plurality of portions, first strip portions extending in a first plane parallel to the longitudinal direction of the strip, second strip portions extending in a second plane parallel to the first plane and different from the first plane, third strip portions each connecting a first strip portion to a second strip portion, the first and second strip portions being alternated over the entire length of the strip and the first portions of a strip being juxtaposed and connected to the second portions of an adjacent strip by fastening means so as to form hexagonal cells. ### Claim 9 Honeycomb metal anchoring structure for the production of an anti-erosion coating on an inner or outer metal wall of a chamber of a fluid catalytic cracking unit, said anchoring structure being formed from a plurality of identical strips connected in pairs so as to form a plurality of cells between two adjacent strips, in which each strip is divided along its length into a plurality of portions, including at least one series of assembly portions extending in a same plane and connected to a series of assembly portions of an adjacent strip by fastening means, each strip having a lower longitudinal edge contained in a single plane and an upper longitudinal edge, the upper longitudinal edge of each strip being formed from a succession of straight sections that are parallel to the lower longitudinal edge, the upper longitudinal edge alternately comprising low sections that are a distance h away from the lower longitudinal edge and high sections that are a distance H, greater than the distance h, away from the lower longitudinal edge, at least one part of the low sections forming the upper edge of at least one part of the assembly portions so that, when two adjacent strips are connected, each assembly portion of a strip comprises an upper longitudinal edge a distance apart from its lower longitudinal edge that is different from the distance separating the upper longitudinal edge from the lower longitudinal edge of the assembly portion of the adjacent strip to which it is connected, over the entire length of the connected assembly portions. ### Claim 10 (depends on 9) Anchoring structure according to claim 9, characterized in that each strip of the anchoring structure is divided along its length into a plurality of portions, first strip portions extending in a first plane parallel to the longitudinal direction of the strip, second strip portions extending in a second plane parallel to the first plane and different from the first plane, third strip portions each connecting a first strip portion to a second strip portion, the first and second strip portions being alternated over the entire length of the strip and the first portions of a strip being juxtaposed and connected to the second portions of an adjacent strip by fastening means so as to form hexagonal cells. ### Claim 11 (depends on 10) Anchoring structure according to claim 10, characterized in that the low sections extend over the entire length of each first portion and the high sections extend over the entire length of each second portion, all the strips of the anchoring structure being identical. ### Claim 12 (depends on 9) Anchoring structure according to one of claim 9, characterized in that the upper longitudinal edge of each assembly portion of two adjacent strips is identical and is formed from a succession of at least one high section and at least one low section. ### Claim 13 (depends on 9) Anchoring structure according to claim 9, characterized in that the upper longitudinal edge of the strip portions located between the assembly portions is a distance H away from the lower longitudinal edge. ### Claim 14 (depends on 9) Anchoring structure according to claim 9, characterized in that the upper longitudinal edge of each strip has rounded junctions between the high sections and the low sections. ### Claim 15 (depends on 9) Honeycomb anchoring structure according to claim 9, characterized in that the difference H-h between the distances H and h is from 4 to 10 mm, preferably from 6 to 8 mm. ### Claim 16 (depends on 9) Honeycomb anchoring structure according to claim 9, characterized in that the strips are made of austenitic stainless steel chosen from the following steels: a stainless steel containing from 0.04% to 0.10% by weight of carbon, from 17% to 19% of chromium and from 9% to 12% of nickel, and with a niobium content of from 8 times the carbon content to 1% by weight, a steel containing at most 0.015% by weight of carbon, from 15% to 17% of chromium and from 33% to 37% of nickel, and a steel containing at most 0.10% by weight of carbon, from 24% to 26% of chromium and from 19% to 22% of nickel. ### Claim 17 (depends on 9) Anti-erosion coating, characterized in that it comprises a honeycomb anchoring structure according to claim 9 embedded in a composite material, for example a concrete, the composite material filling each cell from the lower longitudinal edge of each strip up to the upper longitudinal edge over a distance at least equal to the distance H separating the high sections from the lower longitudinal edge. ### Claim 18 (depends on 17) Chamber of a fluid catalytic cracking unit, characterized in that it comprises at least one inner or outer wall covered with at least one coating according to claim 17, the lower longitudinal edge of each strip of the anchoring structure of the coating being fastened by welding to the inner or outer wall of the chamber.