| Patents for C07C 303 - Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides (11,473) |
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| 04/30/1991 | US5011983 Preparation and reactions of omega-halosulfonyl perfluoroalkanesulfonates |
| 04/30/1991 | US5011982 Reacting salt of sulfamic acid with diketene; cyclization |
| 04/30/1991 | US5011973 Reacting A Trimethylammonium Salt With A Naphthalenedisulfonic Acid; Useful For Enhancing The Digestive Function |
| 04/29/1991 | WO1991006532A1 Process for sulphonating unsaturated fatty acid glycerin esters |
| 04/29/1991 | CA2072094A1 Process for sulphonating unsaturated fatty acid glycerin esters |
| 04/25/1991 | CA2022348A1 Production of alkanesulfonic acids by oxidation of alkanethiols and dialkyl disulfides |
| 04/23/1991 | CA1283499C Peptides |
| 04/23/1991 | CA1283424C Process for the preparation of 5-fluorotoluene-2,4- disulphochloride |
| 04/18/1991 | DE3933860A1 Verfahren zur herstellung von alkyl-polyethoxyethersulfaten A process for the preparation of alkyl polyethoxyethersulfaten |
| 04/17/1991 | EP0422734A1 Process for extractingn-paraffins from a liquid phase by means of supercritical CO2 in a column equipped with perforated trays |
| 04/16/1991 | US5008472 Preparation of 4,4"-dihydroxyterphenyl |
| 04/16/1991 | US5008409 Reacting an aldehyde in a witting reaction, solvent extracting the alkaline earth metal salt of the carboxylic acid and recovering the free carboxylic acid |
| 04/13/1991 | CA2027484A1 Process for extracting an apolar substance from a liquid phase by means of a supercritic gas in an extractor equipped with perforated trays |
| 04/12/1991 | WO1991005764A1 Process for making alkyl polyethoxy ether sulphates |
| 04/12/1991 | CA2067789A1 Process for the production of alkyl polyethoxyether sulfates |
| 04/09/1991 | CA1282787C Synthesis of aryloxypropanolamines and arylethanolamines |
| 04/03/1991 | EP0420235A2 A process for preparing aromatic perfluoroalkenyloxy sulfonates |
| 04/03/1991 | EP0419954A1 Process for the preparation of low-temperature stable alcoholic-aqueous solutions of polyethersulfonates |
| 04/03/1991 | EP0419796A1 2,4-pentanedionemonosulfonic acid and method for preparing the same |
| 04/03/1991 | EP0419795A1 2,4-pentanedione-1,5-disulfonic acid and method for preparing the same |
| 04/03/1991 | EP0419647A1 Process for synthesis of sulfonylimidides. |
| 04/02/1991 | US5004829 Dehydration with phosphorous pentoxide adding phosphoric acid to residue, distillation |
| 03/29/1991 | CA2022636A1 2,4-pentanedione-1,5-disulfonic acid and method for preparing the same |
| 03/29/1991 | CA2022635A1 2,4-pentanedionemonosulfonic acid and method for preparing the same |
| 03/27/1991 | EP0418662A1 Process for the preparation of 2-alkylamino-4-amino benzenesulphuric acids |
| 03/27/1991 | EP0418633A1 Process for the preparation of aromatic (di)chlorosulfonic acids |
| 03/26/1991 | US5002972 Compound and composition of substituted hexenoic acid derivatives useful for treating thromboxane A2 mediated diseases |
| 03/26/1991 | US5002853 Positive working photosensitive composition |
| 03/26/1991 | CA1282077C Process for producing substituted-phenethylamine derivatives |
| 03/21/1991 | WO1991003461A1 Process for making short-chain alkane sulphonic acids from olefines |
| 03/21/1991 | WO1991003460A1 New route of synthesis for tertiary alkyl esters |
| 03/20/1991 | CN1050017A Process for preparing acetyl acetoamide-n-sulfonic acid (salt) |
| 03/19/1991 | US5001261 Cyclohexenone derivatives and their use for controlling undesirable plant growth |
| 03/19/1991 | CA1281738C Process for the preparation of acyloxybenzenesulfonic acids and salts thereof |
| 03/14/1991 | DE3929985A1 Verfahren zur herstellung von kurzkettigen alkansulfonsaeuren aus olefinen Process for the preparation of short-chain alkane sulfonic acids from olefins |
| 03/13/1991 | CN1049845A Process for preparing 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and its non-toxic salts |
| 03/12/1991 | US4999252 Permanent antistatic acid copolymer/quaternary amine mixtures films |
| 03/07/1991 | WO1991002717A1 Process for preparing 5-chlor-2-hydroxy-4-alkyl-benzene-sulphonic acids |
| 03/07/1991 | DE3928565A1 Carbamate(s) or thiocarbamate(s) prepn. - by reaction of alcohol or thiol with substd. ammonium isocyanate in inert diluent |
| 03/06/1991 | EP0415473A1 Process for preparing sulphophenyl carbonate esters |
| 03/05/1991 | US4997847 Biologically active compounds |
| 03/05/1991 | US4997535 From methane, sulfur dioxide and chlorine |
| 03/05/1991 | CA1281032C Process for the preparation of benzylidene compounds |
| 03/01/1991 | CA2025347A1 Process for preparing sulphophenyl carbonate esters |
| 02/28/1991 | DE3926344A1 Verfahren zur herstellung von hellfarbigen oelsaeuresulfonaten Process for the production of light-colored oleic acid sulfonates |
| 02/27/1991 | EP0414655A1 Improved process for the production of carbonate esters |
| 02/27/1991 | CN1011778B Process for preparation of propyl sulphoacid and their salt |
| 02/26/1991 | US4996360 Preparation of arylsulfonyl (alkyl) amides |
| 02/26/1991 | CA2024004A1 Process for the production of carbonate esters |
| 02/26/1991 | CA1280766C Compounds and compositions |
| 02/21/1991 | WO1991001972A1 Process for preparing light-coloured oleic acid sulfonates |
| 02/20/1991 | EP0413230A1 Nitroaniline sulphonic acids and process for preparing phenylenediamino sulphonic acids |
| 02/20/1991 | EP0413201A1 Process for the preparation of 7-hydroxy-1,2-naphthoquinone-(2)-diazide-4-sulfonic acid or salts thereof and their use |
| 02/20/1991 | EP0413200A1 Substituted 1,2-naphthoquinone-(2)-diazide-4-sulfonic acids, process for their production and their use |
| 02/20/1991 | CN1049335A Process for preparing light coloured oleinic acid sulfonate |
| 02/13/1991 | EP0412273A1 Breaking emulsions of alkanesulfonyl chlorides in aqueous hydrochloric acid |
| 02/13/1991 | CA2023067A1 Substituted 1,2-naphthoquinone-2-diazide-4-sulfonic acids and processes for their preparation and use |
| 02/12/1991 | US4992583 Reacting n,n'-dithiobis (sulfonamide) with chlorine gas or sulfuryl chloride |
| 02/12/1991 | US4992089 Herbicidal compounds, compositions and use |
| 02/12/1991 | CA1280123C Process for the preparation of perhalogenomethanesulfinic and -sulfonic acids, and of their salts |
| 02/11/1991 | CA2019673A1 Breaking emulsions of alkanesulfonyl chlorides in aqueous hydrochloric acid |
| 02/07/1991 | WO1991001295A1 Process for preparing quaternary ammonium compounds |
| 02/06/1991 | EP0412011A2 Process for preparing the piperazine salt of 2,5-dihydroxybenzenesulphonic acid monotosylate |
| 02/06/1991 | EP0411209A1 Decolorization of alkanesulfonic and arenesulfonic acids |
| 02/06/1991 | EP0201563B1 Aqueous systems containing amino sulfonic acid derivatives of carboxylic acids |
| 02/06/1991 | CN1049016A Peptidase inhibitors |
| 02/05/1991 | USH890 Herbicidal heterocyclicbenzylsulfonamides |
| 02/05/1991 | US4990668 Reacting selected dioxolane with hydrohalic acid and organic acid, then with amine |
| 02/05/1991 | US4990664 Ethanolamine derivatives |
| 02/05/1991 | US4990637 Chemical intermediates |
| 02/05/1991 | US4990633 Fluorinated bisaryloxy-substituted alkenes, process for their preparation and their use |
| 02/05/1991 | US4990288 Transesterification of sulfonated fatty acid alkyl ester before salt formation |
| 02/04/1991 | CA2022618A1 Process for preparing the piperazine salt of 2,5-dihydroxybenzenesulphonic acid monotosylate |
| 02/01/1991 | CA2005240A1 Decolorization of alkanesulfonic and arenesulfonic acids |
| 01/30/1991 | EP0410411A2 Novel peptidase inhibitors |
| 01/30/1991 | EP0410375A1 Process for producing sulfoalkyl-substituted hydroxylamines |
| 01/29/1991 | US4988817 Process for preparation of quaternary ammonium and phosphonium substituted carbonic acid esters |
| 01/27/1991 | CA2021660A1 Peptidase inhibitors |
| 01/23/1991 | EP0409172A2 Process for dimerizing aromatic halogen compounds |
| 01/23/1991 | EP0408759A1 Method of obtaining bromated aromatic and heterocyclic combinations containing acceptor groups |
| 01/22/1991 | US4987250 Synthesis of hydroxy sulfonic acids |
| 01/22/1991 | US4987249 2,4-pentanedione-1,5-disulfonic acid and method for preparing the same |
| 01/22/1991 | US4987152 Use of sulfamoyl-substituted phenethylamine derivatives in treatment of lower urinary tract dysfunction |
| 01/22/1991 | US4987138 Hypotensives |
| 01/15/1991 | US4985561 Sulfur trioxide sulfonation of aromatic chloroformates |
| 01/15/1991 | US4985180 Process for preparing phenyl esters of substituted acids |
| 01/10/1991 | WO1991000328A1 Improved basic calcium sulphonate |
| 01/10/1991 | WO1991000319A1 Coating compositions |
| 01/10/1991 | WO1991000269A1 Process for obtaining lower alkane sulphonic acids from their alkaline salts |
| 01/10/1991 | WO1991000268A1 Process for the production of light-coloured lower alkane sulphonic acids, especially methane sulphonic acid |
| 01/10/1991 | CA2063263A1 Coating compositions |
| 01/10/1991 | CA2062760A1 Improved basic calcium sulphonate |
| 01/09/1991 | EP0407074A1 Coating compositions |
| 01/09/1991 | EP0406848A1 Production of aromatic aldehydes |
| 01/08/1991 | US4983755 Nematocides |
| 01/03/1991 | DE3918265A1 Verfahren zur herstellung von tensidgemischen auf ethersulfonatbasis und ihre verwendung Process for the preparation of surfactant mixtures and to their use on ethersulfonatbasis |
| 01/02/1991 | EP0405289A1 Process for the preparation of lower alkane sulfonic acids from their alkaline salts |
| 01/02/1991 | EP0405287A1 Process for the preparation of bright lower alkanesulfonic acids, especially methanesulfonic acid |
| 01/02/1991 | EP0405015A1 Reduction of the tendency of strong acids to form solid hydrates |
| 01/01/1991 | US4981973 Bronsted acid, ruthenium catalyst |