公开(公告)号：WO2021250221A1

公开(公告)日：2021-12-16

申请号：PCT/EP2021/065728

申请日：2021-06-10

Applicant: TESSENDERLO GROUP NV

Inventor： GILS, Kristof ,  LANDUYT, Peter ,  LUTS, Peter ,  WHITE, Nicolas

IPC: C05C11/00 ,  C05D1/04 ,  C05D5/00 ,  C05D9/02 ,  C05F11/02 ,  C05G3/30 ,  C05G5/12

Abstract: The present invention relates to a fertilizer in granular form comprising within the same granule a mixture of: (A) From 15 to 85 wt% of a potassium sulfate; and (B) From 85 to 15 wt% of at least one salt that is different from (A) and that provides potassium and/or magnesium and/or calcium and/or sulfate; wherein the fertilizer in granular form has - a potassium level (expressed as K2O) of at least 18 wt%, preferably at least 20 wt%; - a chloride level of at most 10 wt%, preferably at most 5 wt%, more preferably at most 3 wt%; - a magnesium level (expressed as MgO) of at most 10 wt%, preferably at most 9.5 wt%. Materials of the invention are free flowing & combine a good nutrient balance with a good hardness and wear resistance.

公开(公告)号：WO2021250220A1

公开(公告)日：2021-12-16

申请号：PCT/EP2021/065727

申请日：2021-06-10

Applicant: TESSENDERLO GROUP NV

Inventor： LUTS, Peter ,  LANDUYT, Peter ,  GILS, Kristof

IPC: C05D1/02 ,  C05D9/02 ,  C05G3/30 ,  C05G5/12

Abstract: The present invention relates to a process for making a fertilizer in granular form, said process comprising: (i) Providing a mixture comprising (a) potassium sulfate (A) and (b) one or more binders, said one or more binders including water, wherein at least 30 wt.%, preferably at least 40 wt.% of said potassium sulfate (A) has a particle size between 75 and 1000 µm; (ii) Subjecting the mixture to a granulation step to form granules, preferably wherein said granulation step is effected in a wet tumbling granulator; and (iii) Drying the granules; and (iv) Optionally, sieving of the granules thus obtained to retain granules that have a particle size between 1 and 6 mm, preferably between 2 and 5 mm.

公开(公告)号：WO2020144237A1

公开(公告)日：2020-07-16

申请号：PCT/EP2020/050327

申请日：2020-01-08

Applicant: TESSENDERLO GROUP NV

Inventor： LANDUYT, Peter

IPC: C01D5/02 ,  C01B7/03

Abstract: A process for the production of potassium sulphate by conversion of potassium chloride and sulphuric acid using a muffle furnace, said furnace comprising a reaction chamber and a combustion chamber, wherein in the reaction chamber potassium chloride (KCI) and potassium hydrogen sulfate (KHSO 4 ) are reacted to form potassium sulphate while supplying heat to the reaction chamber from the combustion chamber, wherein the combustion chamber has at least a pair of regenerative burners and wherein the process comprises the steps of alternatingly causing one of the regenerative burners to perform a combustion operation in the combustion chamber to heat the reaction chamber and another of the regenerative burners to perform a heat-regenerating operation in a regenerator, wherein the pressure in the combustion chamber is kept at a pressure of between 0.2 and 3 mbarg.