Glycol-Amine process

Chapin, W. F., High Purity Natural Gas by the Glycol-amine Process, PeL Refiner, June, 1947, p. 109,... 

Chemical Processing. Activated carbon consumption in a variety of chemical processing appHcations is about 8% of the total (74). The activated carbon removes impurities to achieve high quaHty. For example, organic contaminants are removed from solution in the production of alum, soda ash, and potassium hydroxide (82). Other apphcations include the manufacture of dyestuffs, glycols, amines, organic acids, urea, hydrochloric acid, and phosphoric acid (83). 

Glycol-amine gas treating a continuous, regenerative process to simultaneously dehydrate and remove acid gases from natural gas or refinery gas. 

Low bath level protects both the liretube and bath when it will coke (hot oils, glycol, amine) or decompose (molten salt). Low/high fuel pressure is always used when the fuel gas Is taken from the exit process stream. 

Additional data on the operation of aqueous MEA plants, including one with a split flow cycle, are given by Estep et al. (1962). Operating data on Glycol-Amine plants, which employ a mixture containing MEA and DEG, are not included here because the process is considered obsolete however, such data are included in previous editions of this book and are available in the literature (Kohl and Blohm, 1950). 

Diaminopropane Processes. 1,2-Propylenediamine can be produced by the reductive amination of propylene oxide (142), 1,2-propylene glycol [57-55-6] (143), or monoisopropanolamine [78-96-6] (144). 1,3-Propanediol [504-63-2] can be used to make 1,3-diaminopropane (143). Various propaneamines are produced by reducing the appropriate acrylonitrile—amine adducts (145—147). Polypropaneamines can be obtained by the oligomerization of 1,3-diaminopropane (148,149). 

The Ford hydroglycolysis process is an example of a combined approach for die depolymerization of PURs. In a reactor, polyurethane foam is reacted with a mixture of water, diethylene glycol, and alkali metal hydroxides at high temperature to form polyols. When sodium hydroxide is added as a catalyst, a cleaner polyol is formed because all of the carbamates and ureas in the product are converted into amines and alcohols by hydrolysis.33... 

The Emser Industries process has no ester linkage, the bonds between the two segments being amides. An amine-terminated soft bis(3-aminopropyl)polyoxytetramethylene glycol is reacted with a dimer acid (Empol 1010) and caprolactum to form polyetheramide (PETA). 

Since poly (ethylene glycols) (PEGs) are rather nontoxic resins, their application in the field of combinatorial chemistry is particularly attractive. A four-component domino process of immobilized aromatic amines 10-53 to give 1,2,3,4-tetrahy-droquinolines 10-54 using this support has been developed by Benaglia and co-... 

Silica fillers also react with the rubber causing an increase in viscosity and dry and unmanageable processing behaviour. Filler activators need to be added to silica-reinforced compounds to overcome these problems. The usual filler activators used are diethylene glycol, polyethylene glycol and amines such as triethanolamine. Some of these activators not only overcome the problems of processing and accelerator absorption, but depending on the cure system used, will also act as vulcanisation activators. 

According to a USEPA survey, many of the more than 150 separate processes used in petroleum refineries generate large quantities of hazardous wastes. Typical wastes generated from refinery processes include bottom sediments and water from crude storage tanks, spent amines, spent acids and caustics, spent clays, spent glycol, catalyst fines, spent Streford solution and sulfur. 

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