Abstract

The invention relates to a method for treating a phosphorus-containing material, comprising the following steps: providing a phosphorus-containing material with a first water content of 50 to 85 wt.-%, preferably 60 and 85 wt.-%, also preferably 60 to 67 wt.-%, particularly preferably 60 to 65 wt.-%; mixing the phosphorus-containing material with at least one potassium-containing substance in order to obtain a mixture; reducing the water content of the mixture to a second water content; thermally reacting the mixture, in particular under reducing conditions, in order to obtain a product. The invention also relates to a fertiliser or fertiliser additive, as well as the use of a product, which can each be produced with a method of this type.

IPC Classes  ?

• C05B 13/06 - Alkali or alkaline earth meta- or polyphosphate fertilisers
• C05D 1/00 - Fertilisers containing potassium
• C05F 1/00 - Fertilisers made from animal corpses, or parts thereof
• C05F 1/02 - Apparatus for their manufacture
• C05F 7/00 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses

Abstract

The object of the present invention is to specify a process and a system for treating gas from a biomass gasification which provides the gas with a purity sufficient for the required standing times, for example of a methanation reactor. This object is achieved according to the invention by a process and a system for treating a synthesis gas originating from a biomass gasification, which comprise the following steps: a) first quenching of the synthesis gas at a first temperature and a first pressure; b) optionally subsequent second quenching of the quenched synthesis gas at a second temperature and a second pressure, wherein the second temperature is lower than the first temperature; c) scrubbing the twice-quenched synthesis gas in an oil scrubber at a scrubbing temperature which is in the range of the second temperature, wherein the loaded scrubbing oil taken off from the oil scrubber is thermally regenerated in a stripping column and/or by means of stripping gas and is subsequently recycled in the cooled state to the oil scrubber; d) purifying the quenched and scrubbed synthesis gas in a catalyst-doped adsorption stage; and e) feeding the thus-purified synthesis gas into a refining process. The thus-described multistage prepurification by means of at least one quenching and also an absorption/desorption stage and if appropriate reactive adsorption and also if appropriate HDS catalysis (hydrogen desulphurization catalysis) and/or chemisorption fulfils this object in an excellent manner.

IPC Classes  ?

• C10J 3/00 - Production of gases containing carbon monoxide and hydrogen, e.g. synthesis gas or town gas, from solid carbonaceous materials by partial oxidation processes involving oxygen or steam
• C10K 1/16 - Purifying combustible gases containing carbon monoxide by washing with liquidsReviving the used wash liquors with non-aqueous liquids
• C10K 1/18 - Purifying combustible gases containing carbon monoxide by washing with liquidsReviving the used wash liquors with non-aqueous liquids hydrocarbon oils
• C10K 1/32 - Purifying combustible gases containing carbon monoxide with selectively absorptive solids, e.g. active carbon