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| Number | Title | Issue Date |
| 4143072 | Process for the purification of polyethers using a tubular coil evaporator This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.... | 03/06/1979 |
| 4137396 | Filtration process for purifying polyols An improvement in the process for the removal of residual catalyst from polyether polyols is achieved by the use of a solvent wash and recovery system.... | 01/30/1979 |
| 4137398 | Process for the removal of catalyst from polyether polyol An improvement in the process of alkaline catalyst removal from crude polyoxyalkylene ether polyols is achieved by treating a mixture of crude polyol, adsorbent, and water with magnesium carbonate and carbon dioxide just prior to filtration.... | 01/30/1979 |
| 4129718 | Process for the removal of catalyst from polyether polyol An improvement in the process of alkaline catalyst removal from crude polyoxyalkylene ether polyols is achieved by treating a mixture of crude polyol, adsorbent, and water with carbon dioxide just prior to filtration.... | 12/12/1978 |
| 4122035 | Process for reclaiming synthetic magnesium silicate or aluminum silicate adsorbents employed in the purification of polyether polyols A process for recovering a catalyst adsorbent from a polyol-adsorbent residue by treatment of the polyol-adsorbent residue with organic solvents. This adsorbent can then be recycled for use in the further removal of alkaline catalysts from polyether polyo... | 10/24/1978 |
| 4118426 | Production of hydroxy ethers A process for the preparation of hydroxy ethers which comprises reacting an epoxide compound with an organic hydroxy compound in the presence of a PdCl2 /CuCl2 /O2 catalyst system, and recovering the hydroxy ether thus for... | 10/03/1978 |
| 4113785 | Polyether polyols and method of preparing same New polyether polyols of predetermined structure are prepared by reacting polyether bis alcoholates with selected bis epoxides. Specifically, a polyoxyalkylene glycol is converted to the bis alcoholate, and then the bis alcoholate is reacted with an equiv... | 09/12/1978 |
| 4110268 | Polyether polyols and polyurethane foams made therefrom In the preparation of normally liquid polyether polyols for use in the production of polyurethane foams, alkaline or basic catalysts, such as potassium hydroxide, which are employed in the process of preparing said polyether polyols, are neutralized with ... | 08/29/1978 |
| 4105580 | Polyglycerol non-ionic surface active agents and process for preparing the same from crude glycidol A process for preparing non-ionic surface active agents comprises condensing crude glycidol, in the presence of an alkaline catalyst on an organic compound containing an active hydrogen atom. The crude glycidol is prepared by dehydrochlorinating glycerol ... | 08/08/1978 |
| 4087355 | Solvent extraction of aromatic hydrocarbons A process for the separation of aromatic hydrocarbon compounds from mixtures thereof with non-aromatic hydrocarbon compounds wherein the mixtures are contacted with a cyanoethylated alkoxylated solvent to form an extract containing the aromatics and separ... | 05/02/1978 |
| 4079086 | Process for reacting alkyl epoxides with glycols Improvements in the reaction of epoxyalkanes with glycols are provided by conducting the reaction in non-polar solvents.... | 03/14/1978 |
| 4061869 | Antistatic agent for thermoplastic synthetic resin There are prepared compounds of the formula ##STR1## where R and R1 are saturated and preferably linear alkyl groups in which the sum of carbon atoms in the two alkyl groups is 4 to 30, One of R and R1 can also be hydrogen, R2 | 12/06/1977 |
| 3954884 | Method for producing beta hydroxy ethylene glycol ethers This invention relates to methods for rapidly producing beta hydroxy ethylene glycol ethers by reacting internal epoxyalkanes with mono or poly ethylene glycols in the presence of critical amounts of acidic catalysts under controlled temperature condition... | 05/04/1976 |
| 3951888 | Process for preparing polyoxyalkylene having allyl end-group A process for preparing a polyalkylene oxide having allyl end-group, by subjecting an alkylene oxide monomer to addition polymerization in the presence of potassium hydroxide in an amount of 2 to 30% by mole to the monomer at a temperature of 20° to 100Â... | 04/20/1976 |
| 3941849 | Polyethers and method for making the same Hydroxy terminated polyethers are obtained by reacting (1) epoxide and oxetane monomers with (2) a telogen at least partially soluble with the monomers, reactive with said monomers and being selected from the group consisting of phenols (3) in admixture t... | 03/02/1976 |
| 3932532 | Ethers of polyglycerol Ethers of polyglycerols and an improved method of preparing said ethers are disclosed. The ethers are prepared by reacting a purified polyglycerol with an alpha olefin epoxide in the presence of an alkali metal alkoxide catalyst.... | 01/13/1976 |
