| Patent Number |
Title Of Patent |
Date Issued |
| 7417168 |
Method for preparing hydroxylamine |
August 26, 2008 |
| A method for preparing hydroxylamine is provided that includes the steps of (i) pretreating an acidic buffer solution; and (ii) reducing nitrate ions in the acidic buffer solution with hydrogen to give hydroxylamine in the presence of catalysts, wherein the pretreatment is performed by |
| 7399885 |
Method for preparing hydroxylamine |
July 15, 2008 |
| A method for preparing hydroxylamine, comprising the steps of: (i) pretreating the acidic buffer solution with the compounds having a functional group represented by formula (I), thereby removing metal impurities from the acidic buffer solution; and (ii) reducing nitrate ions in the |
| 7381843 |
Method for preparing hydroxylamine |
June 3, 2008 |
| A method for preparing hydroxylamine by reducing nitric acid or its salt with hydrogen gas in an aqueous medium in the presence of a catalyst, wherein reduction of nitric acid or its salt is performed in a reactor comprising a reaction section, a cooler disposed at the lower portion of |
| 6784313 |
Process for producing carboxylic acids |
August 31, 2004 |
| A process for producing a carboxylic acid having (n+1) carbon atoms, which includes carbonylating an alcohol having n carbon atoms, and/or an ester of the alcohol and the carboxylic acid in each alkyl group with carbon monoxide in the presence of a catalytic system containing a rhodium |
| 6420304 |
Polymer-supported carbonylation catalyst and its use |
July 16, 2002 |
| The invention relates to a polymer-supported carbonylation catalyst and its use in a process for preparing organic carboxylic acid or anhydride having n+1 carbon atoms. The invention relates also to a process for preparing organic carboxylic acid or anhydride having n+1 carbon atoms by |
| 6395928 |
Rhodium-catalyzed carbonylation using non-acetate lithium, sodium and potassium inorganic salts |
May 28, 2002 |
| The present invention relates to an improved process for producing an organic carboxylic acid having (n+1) carbon atoms by reacting an alcohol having n carbon atoms with carbon monoxide in the presence of a rhodium catalyst system. More particularly, the present invention relates to |
| 6063958 |
Method of recovering adipic acid and 6-hydroxycaproic acid from waste solution of alkali metal s |
May 16, 2000 |
| A method of recovering adipic acid and 6-hydroxycaproic acid from the waste solution of alkali metal salts of organic acids coming from the process of cyclohexane oxidation, which comprises:(i) basifying the reaction mixture coming from cyclohexane oxidation with an aqueous solution of a |
| 6037260 |
Polishing composition |
March 14, 2000 |
| The present invention provides a polishing composition which comprises 100 weight part of water; 0.5 to 20 weight part of boehmite, a hydroxide of aluminum, pseudoboehmite or mixtures thereof; 1 to 50 weight part of aluminum oxide (Al.sub.2 O.sub.3); and 1 to 20 weight part of an acidic |
| 5227519 |
Production of carboxylic acids from carbonylation of alcohol |
July 13, 1993 |
| This invention relates to an improved process for synthesizing carboxylic acids by the carbonylation of alcohol. An alcohol such as methanol is reacted with carbon monoxide in a liquid reaction medium containing a rhodium (Rh) catalyst stabilized with an haloacetic acid, especially t |
| 4876398 |
Preparation of ortho-alkylated phenols in the presence of a catalyst prepared by co-precipitatio |
October 24, 1989 |
| A process for preparing an ortho-alkylated phenol is conducted by a vapor phase catalytic reaction at 200.degree.-500.degree. C. by reacting a vapor phenol compound selected from phenol, ortho-cresol and a mixture of phenol mixed with ortho-cresol with a vapor alcohol selected from metha |
