Synthetic glycerin

Commercially glycerin is obtained as a byproduct in the manufacture of soap, and by various synthetic routes. Crude glycerin is purified by distillation. The various synthetic routes start with propenc. One proceeds via... 

Non-metallic Materials Carbides, carbon, ceramic fiber, ceramic, cermet, composite, cork, elastomer, felt, fiber, glass, glycerin, non-metallic bearing material, rubber (natural), rubber (synthetic), silicone, wood, leather. 

Propanediol Dinitrate was present in NG prepd in Ger by nitrating synthetic glycerin, called Protol... 

S. D. Dzhanakhmedova, E. I. Pryanikov, S. A. Sulejmanova, K. K. Mamedov, E. G. Dubrovina, N. M. Indyukov, and A. B. Sulejmanov. Composition for preventing asphaltene-resin-paraffin deposits—contains waste from production of synthetic glycerine, in mixture with polyacrylamide. Patent SU 1761772-A, 1992. 

An aqueous base is the least expensive vehicle and poses no toxicity problems. A solution of the drug in water or water and cosolvent is made. Glycerin, glycols, natural and synthetic gums, and/or polymers are used to increase viscosity, cohesiveness, and plasticity. To overcome syneresis, or water separation in the gel, a common problem with aqueous bases, one can use absorbing materials such as microcrystalline cellulose, kaolin, colloidal silicon dioxide, starch, etc. 

Chemical plants are a series of operations that take raw materials and convert them into desired products, salable by-products, and unwanted wastes. Fats and oils obtained from animals and plants are hydrolyzed (reacted with water) and then reacted with soda ash or sodium hydroxide to make soaps and glycerine. Bromine and iodine are recovered from sea water and salt brines. Nitrogen and hydrogen are reacted together under pressure in the presence of a catalyst to produce ammonia, the basic ingredient used in the production of synthetic fertilizers. 

Q. Dr. Ambros, is it not a fact that as far back as early 1935, when the vermittlungstelle Wehrmacht was first conceived, you took part in discussions between Farben and Army Ordnance as to the urgent needs for synthetic glycerine ... 

Approximately 27% of glycerol (glycerin) comes from a synthetic process, the hydrolysis of epichlorohydrin. The remaining 73% is made from fats as a by-product of soap manufacture. 

ION EXCLUSION. The process in which a synthetic resin of ihc ion exchange type absorbs nonionized solutes such as glycerine or sugar while it docs not absorb inni/etl solutes that are also present in a solution in contact with the resin. Thus, sodium chloride and glycerine can he separated by passage of their aqueous solution through a bed of particles of an inn exclusion resin. 

Cupric Sulfate Pentahydrate, Blue Stone or Blue Vitriol, CuS04.5H20 mw 249-69, blue crysts, mp - loses 4H20 at 110° and the fifth HaO at > 250° d 2.286 at 15.6/4° sol in w si sol in ale dissolves slowly in glycerin. Can be prepd by dissolving Cu oxide (hydroxide or carbonate) in hot dil sulfuric acid and evaporating the liquid for crystn.lt is the most important Cu salt. It is used in several industries (such as textile, leather, steel, petroleum, ore flotation, synthetic rubber), analytical chemistry, electric batteries, insecticides, etc (Ref 1, p 235 Ref 2, p 3-57 ... 

Bacterial De-Novo Synthesis. The basic idea behind this variant is to use the synthetic potential of bacteria to produce the indole precursor (Scheme 3). Although indole (23) does not occur as an intermediate in bacterial metabolism, it appears as an enzyme-linked intermediate in the biocatalytic transformation ofD-glucose (17) to L-tryptophan (22). The crucial biosynthetic step is the conversion of indole-3-glycerine phosphate (21) to L-tryptophan (22) by the enzyme tryptophan synthase. 

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