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| Number | Title | Issue Date |
| 4228305 | Process for preparing acetic acid derivatives A process for preparing glycolic acid which comprises contacting formaldehyde with formic acid in the presence of hydrogen fluoride present in an amount to serve as both catalyst and solvent for the reactants and reaction mixture.... | 10/14/1980 |
| 4221921 | Monochloroacetic acid from hydroxyacetic acid A process for producing monochloroacetic acid from hydroxyacetic acid which comprises feeding hydroxyacetic acid and aqueous hydrogen chloride to a reaction zone and contacting the hydroxyacetic acid with the aqueous hydrogen chloride in the presence of h... | 09/09/1980 |
| 4221605 | Sulfur foam process Sulfur foam is produced by reacting molten sulfur with organic protonic acids to obtain an adduct and then reacting the adduct with a polyisocyanate to obtain a foam containing more than 50 weight percent sulfur. Before or after reacting the sulfur with t... | 09/09/1980 |
| 4221918 | Preparation of diesters Carboxylic acid anhydrides are contacted with hydrogen in the presence of an insoluble metal hydrogenation catalyst and strong protonic acid to produce 1,1-diesters.... | 09/09/1980 |
| 4219364 | Sulfur foam process and product A process for producing a sulfur foam containing at least 50 weight percent sulfur which comprises contacting and reacting molten sulfur with phenol or an aliphatic polysulfide to thereby obtain a phenol-sulfur adduct or an aliphatic polysulfide-sulfur ad... | 08/26/1980 |
| 4210458 | Plasticized sulfur with improved thixotropy A method of preparing a plasticized sulfur composition of increased viscosity as compared to a mixture of molten sulfur and remelted plasticized sulfur concentrate, which comprises including and mixing 0.01 to 5 weight percent of a C2 -C25... | 07/01/1980 |
| 4199461 | Refrigeration oil containing wear-inhibiting amounts of an aryl phosphate-fatty acid combination Refrigeration or heat pump apparatus containing working fluid consisting essentially of refrigerant and lubricant, said refrigerant being a halo-substituted hydrocarbon of 1 to 3 carbon atoms and preferably at least 40% by weight fluorine, and said lubric... | 04/22/1980 |
| 4199479 | Hydrogenation catalyst A catalyst composition having an intrinsic surface area above about 60 square meters per gram as measured by the BET nitrogen adsorption method, said catalyst comprising from about 1 to 30 weight percent of a finely divided silica component, and from abou... | 04/22/1980 |
| 4197375 | Photodegradability of plastic polyolefins Plastic polyolefins which are resistant to photodegradation are combined with polyisobutylene to improve photodegradability.... | 04/08/1980 |
| 4194056 | Acetic acid from methyl formate Acetic acid is obtained by heating methyl formate in the presence of soluble rhodium salt catalyst and halogen promoter and sufficient carbon monoxide to convert said rhodium salt into at least a monocarbonyl compound.... | 03/18/1980 |
| 4189608 | Carboxylic acid preparation A process for preparing 3-butenoic acid which comprises contacting allyl alcohol with carbon monoxide and a palladium chloride catalyst at a temperature between about 50° and 300° C. and under superatmospheric pressure and wherein the reaction is carrie... | 02/19/1980 |
| 4188494 | Hydrogen fluoride removal from glycolic acid The concentration of hydrogen fluoride in crude glycolic acid made by the hydrogen fluoride-catalyzed reaction of formaldehyde and carbon monoxide can be reduced to less than about 1% by weight by removing the HF from the crude gylcolic acid by distillati... | 02/12/1980 |
| 4187235 | Method for preparing maleic anhydride A crystalline vanadium (IV) phosphate composition having an intrinsic surface area in excess of 10 square meters per gram is prepared by the reaction of orthophosphoric acid with a vanadium (IV) oxycompound. The vanadium compound is suspended in a suitabl... | 02/05/1980 |
| 4174366 | Method of making reinforced concrete Shaped concrete compositions can be pre-stressed to obtain improved flexural strength by embedding nylon-4 reinforcing bars in a wet-laid concrete prior to curing.... | 11/13/1979 |
| 4172211 | Process for preparing thioethers of mercapto-acids A process for preparing thioethers of mercaptocarboxylic acids by contacting glycolic acid or bromoacetic acid and a mercaptan in the presence of aqueous hydrogen bromide.... | 10/23/1979 |
| 4169961 | Alcohol production An alkenediol is produced from an alkenol by contacting the alkenol with formaldehyde at a pH maintained between about 4 and 7. Preferably this pH range is maintained by adding a buffering agent composed of a weak acid and the salt of a weak acid. Particu... | 10/02/1979 |
| 4166821 | Process for preparing 1,4-dioxan-2-ones 1,4-Dioxan-2-ones are prepared by contacting carbon monoxide with formaldehyde, a 1,2-glycol, and a catalytic amount of hydrogen fluoride. The products of this reaction are readily converted into diglycolic acids by heating with aqueous caustic in the pre... | 09/04/1979 |
| 4165438 | Synthesis of acrylic acids and esters Acrylic acids and esters are produced by reacting a lower alkanoic acid or lower alkyl ester thereof with formaldehyde in the presence of a vanadium orthophosphate catalyst having an intrinsic surface area of from about 10 m2 /g to about 50 m | 08/21/1979 |
| 4164428 | Plasticized sulfur composition A plasticized sulfur composition having improved chemical resistance, comprising at least 50% by weight sulfur, a sulfur plasticizer, a mineral suspending agent, and an organosilane stabilizing agent.... | 08/14/1979 |
| 4161612 | Process for preparing thiodiglycolic acid A process for preparing thiodiglycolic acid comprises contacting bromoacetic acid, diglycolic acid or glycolic acid and hydrogen sulfide in the presence of aqueous hydrogen bromide.... | 07/17/1979 |
| 4160770 | Lactones Spirodilactones from alkenyl or alkyl bis(succinic anhydride) and acids and alkyl esters thereof.... | 07/10/1979 |
| 4156686 | Catalytic reaction of alkenyl succinic anhydrides and olefins A process for preparing alkyl maleic anhydrides which comprises heating a lower alkenyl succinic anhydride in the presence of a catalytic amount of ruthenium or a catalytic salt thereof under conditions effective to isomerize the alkenyl succinic anhydrid... | 05/29/1979 |
| 4156676 | Hot melt adhesives having improved thermal stability The thermal stability of hot melt adhesives comprising a polymer of glycolic acid is significantly improved by incorporating a minor amount of silica in the adhesive composition.... | 05/29/1979 |
| 4153809 | Extractive separation of glycolic acid from diglycolic acid Diglycolic acid is separated from glycolic acid by preferential extraction from an aqueous mixture of the two acids using an organic solution of a water-insoluble trihydrocarbylphosphine oxide as the extraction agent.... | 05/08/1979 |
| 4149021 | Ester hydrogenation using cobalt, zinc and copper oxide catalyst A process for hydrogenation of esters to alcohols which comprises contacting the ester with hydrogen and a catalyst comprising cobalt, zinc and copper under catalytic hydrogenation conditions including a temperature between 150° and 450° C. and a pressu... | 04/10/1979 |
| 4144401 | Alcohol production Ethylene glycol and methanol are prepared in one step by contacting carbon monoxide, hydrogen and formaldehyde in the presence of an alcohol solvent and a catalyst comprising a rhodium compound.... | 03/13/1979 |
| 4144082 | Sulfur plasticizing composition A sulfur plasticizing composition comprising an aromatic polymeric polysulfide, a linear aliphatic polysulfide and an olefinic-type unsaturated carboxylic acid. The presence of unsaturated acid moderates the evolution of hydrogen sulfide when the plastici... | 03/13/1979 |
| 4143235 | Cadmium sulfide photovoltaic cell and method of fabrication A cadmium sulfide photovoltaic cell of improved efficiency comprising a barrier layer and cadmium sulfide-containing bilayer, the bilayer being formed by depositing at a first temperature an initial layer of cadmium sulfide in interfacial contact with the... | 03/06/1979 |
| 4142061 | Hydroformylation of olefins using azoxy-dentated ligands At a temperature in the range 100° C to 225° C the destructive dissociation of cobalt carbonyl compounds to cobalt metal and residue is inhibited by the action of one or more azoxy-dentated chelation ligands.... | 02/27/1979 |
| 4142057 | Process for preparing diglycolic acids 1,4-Dioxan-2-ones are prepared by contacting carbon monoxide with formaldehyde, a 1,2-glycol, and a catalytic amount of hydrogen fluoride. The products of this reaction are readily converted into diglycolic acids by heating with aqueous caustic in the pre... | 02/27/1979 |
| 4139556 | Mono-ol from diol and improved citric acid process A process for producing 3-methyl-3-buten-1-ol from 3-methyl-2-pentene-1,5-diol which comprises heating 3-methyl-2-pentene-1,5-diol at a temperature between 200° and 450° C. in the presence of isobutene. According to a preferred embodiment, the heating s... | 02/13/1979 |
| 4139663 | Process for applying a smooth coating of plasticized sulfur composition A process for applying a smooth coating of a plasticized-sulfur composition which comprises: (1) conducting a continuous stream of a molten plasticized-sulfur coating composition through a flexible conduit to a spray nozzle; (2) injecting a substantially inert... | 02/13/1979 |
| 4139525 | Flexible glycolic acid terpolymers Flexible glycolic acid terpolymers useful in the preparation of hot-melt adhesives are prepared by heating glycolic acid, its esters, its homopolymers or mixtures thereof with a dihydroxyalkane and a dibasic acid.... | 02/13/1979 |
| 4136112 | Process for preparing glycolic acid from formaldehyde using acetic acid The hydrogen fluoride-catalyzed carbonylation of formaldehyde to prepare glycolic acid can be carried out with a significant reduction in by-product formation and at a significantly improved rate by incorporating minor amounts of acetic acid in the reacti... | 01/23/1979 |
| 4132670 | Method of preparing vanadium (IV) phosphate composition with high intrinsic surface area A crystalline vanadium (IV) phosphate composition having an intrinsic surface area in excess of 10 square meters per gram is prepared by the reaction of orthophosphoric acid with a vanadium (IV) oxycompound. The vanadium compound is suspended in a suitabl... | 01/02/1979 |
| 4129595 | Preparation of chloroacetyl chloride Chloroacetyl chloride is prepared by reacting glycolic acid with thionyl chloride in the presence of nitrogen-containing organic compound or phosphine compound.... | 12/12/1978 |
| 4129453 | Sulfur composition A composition comprising sulfur, a plasticizer, asbestos fibers, and a dispersing agent and wherein the asbestos fibers include 20 to 80 weight percent amphibole and 20 to 80 weight percent chrysotile. The composition is useful as a construction material ... | 12/12/1978 |
| 4126614 | Oxacaprolactams 3-OXACAPROLACTAM IS PREPARED BY A PROCESS WHICH COMPRISES: CONTACTING AN ORGANIC ACID ANHYDRIDE SOLUTION OF A CYANOALKOXYALKANOATE WITH HYDROGEN IN THE PRESENCE OF A NOBLE METAL HYDROGENATION CATALYST TO PREPARE AN AMIDE-ESTER; AND HEATING THE AMIDE-ESTER... | 11/21/1978 |
| 4123605 | Meta-isocyanatobenzyl isocyanate-derived polyurethanes A novel chemical compound is disclosed, namely meta-isocyanatobenzylisocyanate (MIBI). MIBI can be used to form useful polyurethane materials, particularly polyurethane coating materials.... | 10/31/1978 |
| 4123442 | Regeneration of maleic anhydride vanadium-phosphorus-oxygen catalyst by contacting with sulfur trioxide The catalytic properties of a complex catalyst comprising vanadium, phosphorus and oxygen which is used for the oxidation of hydrocarbons to maleic anhydride can be partially regenerated by contacting the catalyst with sulfur trioxide.... | 10/31/1978 |
