Ferritic steel parts in urea plants
AssigneeStamicarbon B.V.
InventorsKirk Anguah Ofei, Alexander Aleida Antonius Scheerder
Life of this patent
Estimating the term…
Abstract
The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.
Claims17
A method of manufacturing a component, wherein the component comprises a first and a second part which have a metallurgical bond to each other, wherein the first part is made of ferritic stainless steel, and the second part is made of a different type of steel than the first part, the method comprising:
- i) providing a mold defining the shape of an object to be manufactured;
- ii) filling a portion of the mold corresponding to said first part with first stainless steel alloy powder which is a ferritic stainless steel alloy powder;
- iii) filling a portion of the mold corresponding to said second part with a second stainless steel alloy powder having a different elemental composition than said first stainless steel alloy powder;
- and iv) subjecting said mold, as filled with said first and second stainless steel alloy powder, to hot isostatic pressing, to give a consolidated object.
Dependencies are inferred from the claim text.