Copper chloride treating

Hakamatsuka, T., Ebizuka, Y., and Sankawa, U., Induced isoflavonoids from copper chloride-treated stems of Pueraria lobata. Phytochemistry, 30, 1481, 1991. 

Carlson and Dolphin (18) reported production of cinnamylphenols and a 2f-methoxychalcone in copper chloride-treated pea plants. 

The solvent method may also be performed either by continuous (in cascades) or by batch operation. Continuous techniques in particular have gained considerable technical importance. A phthalonitrile/copper chloride solution is typically treated at 120 to 140°C in a flow tube furnace and the temperature subsequently increased to 180 to 250°C. The entire process requires approximately 1.5 to 2 hours and affords the pigment in practically quantitative yield. The excellent purity of the product eliminates the need for additional purification with dilute acid or base prior to finishing, a procedure which plays a major role in the baking process. These... 

Sulfur compounds are most commonly removed or converted to a harmless form by chemical treatment with lye. Doctor solution, copper chloride, or similar treating agents (Speight, 1999). Hydrorefining processes (Speight, 1999) are also often used in place of chemical treatments. When used as a solvent, naphtha is selected for its low sulfur content and the usual treatment processes remove only sulfur compounds. Naphtha, with its small aromatic content, has a slight odor, but the aromatics increase the solvent power of the naphtha and there is no need to remove aromatics unless odor-free naphtha is specified. 

Other waste streams from the process result from water washing of the treated product and regeneration of the treating solution such as sodium plumbite (Na2Pb02) in doctor sweetening. These waste streams contain small amounts of oil and the treating material, such as sodium plumbite (or copper from copper chloride sweetening). 

Removal of the objectionable odors due to the presence of H2S and mercaptans is the objective of the fuel sweetening process. Several methods can be utilized to remove these undesirable compounds including caustic washing, copper chloride sweetening, sulfuric acid treating, Merox processing, and hydrotreating. These methods will be discussed below. 

For the Sandmeyer reaction it is not necessary to isolate the solid product. The solution, after removing the copper, is treated with cone, hydrochloric acid until the total weight is 815 gms. This solution contains about 10% cuprous chloride. 

Cognate preparation. 3,4-Dimethoxybenzaldehyde 2.4-dudtrophenylhydror zone (use of bis(triphenylphosphine)copper(i) tetrahydroborate)50 3,4-Dimethoxybenzoyl chloride (1.14g, 5.7 mmol) in acetone (100 ml) is treated with triphenylphosphine (3.04 g, 11.6 mmol). To this solution at room temperature, bis(triphenylphosphine)copper(i) tetrahydroborate (3.47 g, 5.8 mmol) (Section 4.2.49, p. 449) is added and the reaction mixture stirred for 45 minutes. The white precipitate of triphenylphosphine copper chloride (4.9 g, 5.5 mmol) is removed by filtration and the filtrate evaporated to dryness. The residue is extracted with ether (the ether-insoluble residue is shown to be triphenylphosphine borane). The ether is removed, the residue... 

Silicon and univalent copper chloride powders are mixed and pelleted. The pellets are dried and treated with hydrogen at 300 °C. Copper chloride is reduced, and silicon particles are covered with free copper ... 

Lean Copper Solvent Treated water C2-chlor. HC, lights Hydrogen chloride Heavy C2-Chlor. Perchlorethylene Air Water Vapor Engine Jacket Water Absorption Oil Air-Chlorine Treated Water... 

It must be borne in mind that some dyes are salt-sensitive, the change in shade being caused by the sodium Chloride. Such dyestuffs can be discoloured when splashed wdth sea water, but salt staining is usually removed by rinsing in fresh water. Perspiration can also remove the metal from some copper after-treated direct dyes resulting in loss of wet and light fastness. 

Although it is possible to prepare aryl chlorides and aryl bromides by electrophilic aromatic substitution, it is often necessary to prepare these compounds from an aromatic amine. The amine is converted to the corresponding diazonium salt and then treated with copper chloride or copper(I) bromide as appropriate. 

Palladium acts as a nucleating agent for the electroless deposition of copper. By treating the surface with palladium [II] chloride in hydrochloric add a monolayer or so of palladium is deposited on the TiW surface. The palladium chloride solution also contains 1% of hydrofluoric acid which attacks the silica, undercutting the TiW islands (Fig. 5(b)). Electroless copper is now deposited, nucleating on the palladium-covered TiW and growing from it. Finally copper is eleetrodeposited and is thus mechanically anchored to the silicon surface (Figs. 5(c) and (d)). 

Hyperbranched PPEs with phenolic terminal groups can be prepared from 4-bromo-4, 4"-dihydroxytriphenylmethane via a modified Ullmann reaction. The monomer is treated with potassium carbonate or sodium hydroxide as a base. Copper chloride is used as a catalyst in an aprotic solvent, namely, dimethyl sulfoxide or sulfolane. The degrees of branching reach from 48-71%. The phenoUc end groups can be easily modified. 

GiUieany et al. [71-76] reported the oxidation of tertiary phosphine 133 with polyhaloalkanes in the presence of chiral proton-donating auxiliary L-menthol (the asymmetric Appel reaction). As a result, chiral phosphine oxides 134 were prepared with good enantiomeric excess. The latter were then treated with LDA and copper chloride to afford the bis-phosphine oxide which is a useful chiral ligand for asymmetric catalysis. The chiral bis-phosphine oxide R,R)-liS was produced in 98% ee and the minor amount of meso-isomer formed was easily removed by recrystallization from benzene, which yielded enantiopure (>99.9% ee) bis-phosphine oxide 135 in an isolated yield of 73% from the racemic phosphine 133 (Scheme 41). 

Raw gasoline and raw naphtha are often treated with chemical agents such as Caustic soda, copper chloride, or doctor solution. Much naphtha is now catalytically reformed into high octane gasoline. Kero-... 

Eductors are used more widely than indicated in the diagrams in this chapter, but an eductor is shown in the copper chloride diagram of Fig. 10-9. In the most simple arrangement, a batch of dye or treating... 

Cuprous chloride, ammoniacal this solution is used for the same purpose and is made in the same manner as the acid cuprous chloride above, except that the acid solution is treated with ammonia until a faint odor of ammonia is perceptible. Copper wire should be kept with the solution as in the acid reagent. 

Bronze disease necessitates immediate action to halt the process and remove the cause. For a long time, stabilization was sought by removal of the cuprous chloride by immersing the object in a solution of sodium sesquicarbonate. This process was, however, extremely time-consuming, frequentiy unsuccesshil, and often the cause of unpleasant discolorations of the patina. Objects affected by bronze disease are mostiy treated by immersion in, or surface appHcation of, 1 H-henzotriazole [95-14-7] C H N, a corrosion inhibitor for copper. A localized treatment is the excavation of cuprous chloride from the affected area until bare metal is obtained, followed by appHcation of moist, freshly precipitated silver oxide which serves to stabilize the chloride by formation of silver chloride. Subsequent storage in very dry conditions is generally recommended to prevent recurrence. 

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