Inventor
GRADL REINHARD
DE33 patents
Patents
33 patentsUS5183651AFeb 2, 1993
Process for the preparation of crystalline sodium silicates
HOECHST AG55 citations95
US5211930AMay 18, 1993
Process for the preparation of crystalline sodium silicates having a sheet structure
HOECHST AG22 citations92
US5166452ANov 24, 1992
Process for inhibiting and destroying peroxides in dialkyl ethers
HOECHST AG30 citations92
US4479924AOct 30, 1984
Process for the separation of heavy metal compounds from phosphoric acid
HOECHST AG31 citations92
US5066365ANov 19, 1991
Process for the isolation of vinyl acetate by distillation
HOECHST AG49 citations91
US5165904ANov 24, 1992
Process for producing ammonium polyphosphate
HOECHST AG23 citations90
US4452768AJun 5, 1984
Process for removing heavy metal ions from wet-processed phosphoric acid
HOECHST AG24 citations82
US4713229ADec 15, 1987
Process for purifying phosphoric acid
HOECHST AG15 citations74
US4629614ADec 16, 1986
Process for decontaminating phosphoric acid
HOECHST AG7 citations74
US4503016AMar 5, 1985
Process for extracting heavy metal ions from aqueous solutions
HOECHST AG14 citations74
US4466948AAug 21, 1984
Process for removing heavy metal ions and arsenic from wet-processed phosphoric acid
HOECHST AG7 citations74
US4457848AJul 3, 1984
Process for after-treating extraction residues originating from the decontamination of phosphoric acid
HOECHST AG8 citations74
US5124290AJun 23, 1992
Process for removing metallic corrosion products from carbonylation reactions carried out under anhydrous conditions
HOECHST AG19 citations73
US4321245AMar 23, 1982
Process for the purification of wet-processed phosphoric acid
HOECHST AG9 citations73
US4313826AFeb 2, 1982
Liquid-liquid extraction apparatus
HOECHST AG8 citations73
US4762693AAug 9, 1988
Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid
HOECHST AG10 citations72
US4556548ADec 3, 1985
Process for purifying wet-processed phosphoric acid
HOECHST AG12 citations71
US4678650AJul 7, 1987
Process for making an alkali phosphate solution
HOECHST AG5 citations63
US4668492AMay 26, 1987
Process for dearsenifying phosphoric acid solutions
HOECHST AG4 citations63
US4540557ASep 10, 1985
Process for reducing the fluorine content in wet-processed phosphoric acid
HOECHST AG3 citations63
US4539192ASep 3, 1985
Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid
HOECHST AG6 citations63
US4444729AApr 24, 1984
Multistage column for countercurrent extraction of liquids
HOECHST AG6 citations63
US4705529ANov 10, 1987
Process for reducing the reactivity and improving the flow behavior of phosphorus pentoxide
HOECHST AG2 citations62
US4279876AJul 21, 1981
Conversion of extraction residues originating from phosphoric acid decontamination to solid deposition products
HOECHST AG5 citations62
US4806324AFeb 21, 1989
Process for making phosphoric acid free from titanium
HOECHST AG0 citations52
US4640824AFeb 3, 1987
Process for making alkali metal phosphate solutions containing little fluorine
HOECHST AG1 citations52
US4540558ASep 10, 1985
Process for removing organic contaminants from wet-processed phosphoric acid
HOECHST AG1 citations52
US4460549AJul 17, 1984
Recovery of uranium from wet-process phosphoric acid
HOECHST AG0 citations52
US4620966ANov 4, 1986
Process for defluorinating alkali metal phosphate solutions
HOECHST AG1 citations51
US4780294AOct 25, 1988
Process for making crude phosphoric acid
HOECHST AG1 citations49
US5124137AJun 23, 1992
Process for the preparation of alkali metal phosphate solutions
HOECHST AG0 citations41
US4346066AAug 24, 1982
Purification of wet-process phosphoric acid
HOECHST AG0 citations41
US4683127AJul 28, 1987
Process for making wet-process phosphoric acid
HOECHST AG0 citations39