| Patent No. | Patent Title: |
| 4140748 | Hemihydrate type phosphoric acid process with crystal modifier |
| 4132760 | Hemihydrate type phosphoric acid process using reduced pressure |
| 4127640 | Purification of phosphoric acid by solvent extraction using hexan... |
| 4119702 | Process for abating concentration of nitrogen oxides in combustio... |
| 4117091 | Wet process phosphoric acid produced using gypsum-containing wast... |
| 4117075 | Method of combustion for depressing nitrogen oxide discharge |
| 4115515 | Method for reducing NOx emission to the atmosphere |
| 4115522 | Stabilized red phosphorus and process for making it |
| 4113841 | Stabilized red phosphorus and process for making it |
| 4113838 | Method of treating combustion exhaust gas containing nitrogen oxi... |
| 4110422 | Production of stabilized wet process phosphoric acid |
| 4110423 | Production of chlorine and ammonia |
| 4108963 | Process for purifying phosphoric acid |
| 4107272 | Process for removing nitrogen oxides using ammonia as a reductant... |
| 4107271 | Wet-treatment of exhaust gases |
| 4105749 | Phosphoric acid manufacture from phosphate matrix |
| 4105748 | Method of producing phosphoric acid and potassium dihydrogen phos... |
| 4101638 | Process for the manufacture of a slurry containing highly concent... |
| 4098872 | Stabilized red phosphorus and process for making it |
| 4094958 | Process for the separation of NH3 from a gaseous mixtu... |
| 4092358 | Process for the production of urea having a low carbamate content |
| 4091074 | Method for regenerating iron-EDTA solutions used for scrubbing pl... |
| 4089932 | Process for the production of spherical silica gel |
| 4089930 | Process for the catalytic reduction of nitric oxide |
| 4088738 | Process for producing phosphoric acid using mixed acid feed and a... |
| 4087512 | Process for removing solid organic material from wet-process phos... |
| 4086271 | Urea synthesis with improved heat recovery and conversion |
| 4086290 | Oxidative dehydrogenation process |
| 4085193 | Catalytic process for reducing nitrogen oxides to nitrogen |
| 4085194 | Waste flue gas desulfurizing method |
| 4083937 | Process for preparing pure phosphoric acid |
| 4083929 | Beneficiation of phosphate rock |
| 4083934 | Process for obtaining pure orthophosphoric acid from superphospho... |
| 4083924 | Method of regenerating used contaminant-removing material |
| 4083936 | Manufacture of phosphoric acid using acid phosphate ester antifoa... |
| 4082836 | Process for the purification of phosphoric acid by extraction |
| 4081509 | Method for removing nitrogen oxides from flue gas by absorption |
| 4081510 | Process for catalytically treating an exhaust gas containing ammo... |
| 4080426 | Reduction of nitric oxide using catalysts pretreated with seleniu... |
| 4080425 | Elimination of nitrogen oxides from exhaust gases with nitriles |
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