Gelatin solidity

Zinc(ll) hydroxide is a white gelatinous solid obtained when the stoichiometric quantity of alkali hydroxide is added to a solution of a zinc salt ... 

In a 3-1. round-bottomed flask equipped with a reflux condenser (Note 1) are placed 176 g. (1.60 moles) of diethylamine hydrochloride (Note 2), 68 g. (2.26 moles) of paraformaldehyde, 600 ml. (8.1 moles) of acetone, 80 ml. of methanol, and 0.2 ml. of concentrated hydrochloric acid. The mixture is heated for 12 hours at a moderate to vigorous rate of reflux (Note 3). The light-yellow solution, in which a small amount of gelatinous solid remains, is cooled, and a cold solution of 65 g. of sodium hydroxide in 300 ml. of water is added. The mixture is extracted with three 200-ml. portions of ether, the combined extracts are washed with two 150-ml. portions of saturated sodium chloride solution, and the washes are re-extracted with two 150-ml. portions of ether. 

There are several items for consideration in the operation of the circuit to minimize crud formation. In certain systems, solvent saturation can result in the formation of gelatinous solids, as in the rare earth-DEHPA system [50,55] and in the zirconium-TBP circuit [56]. The phenomenon is partially due to the increase in viscosity as loading is reached. An increase in the O/A ratio thus results in a decrease in crud formation. As the viscosity increases, excessive agitation can produce stable emulsions. 

This is a white, gelatinous solid of composition close to 2Po02-H3P04, made by the action of 1 M diammouium phosphate on solid polonium tetrachloride or of 2 M phosphoric acid on polonium hydroxide. It appears... 

Triturate 4 times with 50 cm3 portions of Et20 50 cm3 EtjO, stir 1 h, decant, repeat 50 cm3 Et20, stir 0.5 h, decant Initial green gelatinous solid, stir 25 cm3 Et,0, stir 15 cm3 Et20, stir overnight 10 cm3 EOF, stir 1.5 h... 

The above bis ester (2.5 g) was refluxed with sodium bicarbonate (1.64 g) in ethanol (100 ml) and water (50 ml) for 1.5 hours. The whole was poured into water and acidified to precipitate a gelatinous solid. This was collected by filtration, refluxed with ethanol and the product was separated by centrifugation (1.4 g), mp 303°-304°C dec. The structure of the product was confirmed by mass and NMR evidence. 

The most common solid supports in SPS are hydrophobic polystyrene (PS) resin beads (9), which are representatives of the class of so-called gelatinous solid supports. They consist of PS cross-linked with 1-2% divinylbenzene (DVB) and are described schematically in Fig. 1.1, which shows the appearance of a hydroxymethyl-grafted PS resin. 

Stir the mixture for 10 min at 0°C, keeping the reaction mixture free of moisture with a calcium chloride drying tube. If a gelatinous solid (symmetrical anhydride) precipitates, add dry DMF dropwise to redissolve. Continue stirring for a further 10 min. 

Fe(OH)3 (iron (III) hydroxide, ferric hydroxide) A rust-colored gelatinous solid precipitated by adding an alkali to a solution containing Fe + ions. 

In the catalyst world, precipitation involves combining two solutions to form a desired solid. For example, mixing an aqueous solution of aluminum nitrate [A1(N03)3] with sodium aluminate [Na2Al204] yields aluminum hydroxide [Al(OH)3], which forms a gelatinous solid. As the gel ages, tiny crystals grow larger and a pore structure starts to develop. 

Blood plasma, paints (latex), gelatin Solid Liquid... 

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