Patent application number | Description | Published |
20080214774 | Thiourethane Compositions and Processes for Making and Using Same - Thiourethane prepolymer compositions, thiourethane polymer compositions, methods of making the compositions, and methods of using the thiourethane polymer compositions are provided. The thiourethane polymer composition can be produced by contacting a thiol ester composition and an isocyanate composition to produce a prepolymer composition and then curing the prepolymer composition to produce the thiourethane polymer composition. The prepolymer composition can also include a property modifying agent. In some embodiments, the thiol ester compositions include thiol esters, hydroxy thiol esters, and cross-linked thiol esters. | 09-04-2008 |
20080242894 | Graded Catalyst Bed for Methyl Mercaptan Synthesis - A process and graded catalyst bed for selectively producing methyl mercaptan from methanol. The methanol is reacted with hydrogen sulfide, in the presence of a graded catalyst bed containing at least three types of nickel or cobalt molybdenum alumina catalysts to convert the methanol to methyl mercaptan in one-pass. At least one of the hydrotreating catalysts can contain aluminium phosphate. Use of the graded catalyst bed prevents the formation of a hot spot within the graded catalyst bed. The methyl mercaptan having less than about 30 wt. % unreacted methanol contained therein. | 10-02-2008 |
20090124762 | Methods and systems for the selective formation of thiourethane bonds and compounds formed therefrom - The present techniques relate to thiourethane compositions formed by reacting a reactive composition containing active molecules having an average of at least one thiol group per active molecule and an average of at least one hydroxyl group per active molecule with a monomer composition containing monomer molecules having an average of at least two isocyanate groups per monomer molecule. The reactions are performed in the presence of an amine catalyst, which may preferentially react thiol groups over hydroxyl groups, thus forming a thiourethane composition having, on average, more hydroxyl groups than thiol groups and more thiourethane groups than urethane groups, on a normalized basis. | 05-14-2009 |
20090124784 | Methods and compounds for curing polythiourethane compositions - The present techniques relate to formulations that include a first part containing active molecules that have an average of at least one thiol group per active molecule and an average of at least one hydroxyl group per active molecule, and a second part containing monomer molecules that have an average of at least two isocyanate groups per monomer molecule. The composition may be mixed with a catalyst composition that contains at least one amine catalyst and at least one metal catalyst. This mixed catalyst composition will substantially cure a mixture of the first part and the second part within less than about 48 hours at ambient temperature. | 05-14-2009 |
20110251358 | OLIGOMERIZATION OF BIS(BETA-HYDROXY) POLYSULFIDES THROUGH ETHERIFICATION - The present invention discloses compositions comprising oligomers derived from bis(beta-hydroxy)polysulfides, such as dihydroxydiethyl disulfide, and oligomerization processes for producing these compositions. | 10-13-2011 |
20120035291 | METHODS OF MERCAPTANIZING OLEFINIC HYDROCARBONS AND COMPOSITIONS PRODUCED THEREFROM - The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described. | 02-09-2012 |
20130240780 | Methods of Mercaptanizing Olefinic Hydrocarbons and Compositions Produced Therefrom - The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described. | 09-19-2013 |
20150266734 | Processes for Removing Polysulfanes and Elemental Sulfur from Hydrogen Sulfide - Disclosed are processes for purifying feed streams containing hydrogen sulfide and sulfur-containing impurities by removing sulfur-containing impurities, such as elemental sulfur and polysulfanes, using solid catalytic sorbents. Also disclosed are processes for producing hydrogen sulfide. | 09-24-2015 |