摘要:
In the production of chlorinated hydrocarbons by contacting a molten salt mixture of the higher and lower chloride of a multivalent metal, such as a mixture of cuprous and cupric chloride, with molecular oxygen to effect oxidation to the oxychloride, followed by use of the oxidized salt for the production of chlorinated hydrocarbons, the quantity of carbon dioxide vented from the system is determined, and oxygen introduction is decreased in response to increases in vented carbon dioxide to decrease oxychloride concentration and limit carbon dioxide production.
摘要:
In the production of chlorinated hydrocarbons, a gas stream containing unreacted hydrocarbon, carbon dioxide, and chlorinated hydrocarbon(s) is contacted with an acid gas absorption solution to absorb carbon dioxide, with the absorption solution being stripped of any absorbed chlorinated hydrocarbon, preferably by use of feed hydrocarbon as stripping gas, without stripping of carbon dioxide therefrom, to maintain the rich absorption solution introduced into the carbon dioxide stripper essentially free of absorbed chlorinated hydrocarbons.
摘要:
Prenyl chloride (1-chloro-3-methylbutene-2) may be synthesized in increased yields by reacting isoprene with hydrochloric acid in the presence of sodium chloride. In addition, the yield may also be advantageously increased by utilizing a modified method of operation in which the distillation heads and tails fractions which are obtained from the process are recycled to the reaction zone.
摘要:
1,1,1-Trihalo-4-methylpentenes, carrying 2-substituents selected from those conjugate bases of Bronsted acids which are leaving groups in beta eliminations, are reduced electrochemically to 1,1-dihalo-4-methylpentadienes, intermediates in the synthesis of pyrethroid insecticides.
摘要:
A method for preventing the undesired hydrochlorination of unsaturated hydrocarbons and chlorohydrocarbons in the presence of aluminum chloride involves the addition of a material capable of preferentially inactivating the ability of the AlCl.sub.3 to catalyze hydrochlorination.
摘要:
Process for removing hydrochloric acid and other impurities which are contained in vinyl chloride monomer, by treatment in a distillation zone, comprising the addition to crude vinyl chloride, in the course of distillation thereof, of at least one alcohol selected from the group of C.sub.4 to C.sub.10 tertiary aliphatic alcohols and C.sub.3 to C.sub.10 primary or secondary alcohols with unsaturation in the alpha position, and rectifying the vinyl chloride monomer from the resulting mixture.
摘要:
Alcohols and ethers are prepared by reacting a substituted hydrocarbon compound containing halogen or alkyl sulfate groups with an alkali metal hydroxide, in aqueous solution, in the presence of a catalytic amount of certain betaines and recovering from the reaction mixture the desired alcohol and/or ether. The reaction mixture can contain alcohols, ethers, and diethers, in varying amounts, depending on reactants and reaction conditions. Typical examples of materials used are: 1,4-dichlorobutane, sodium hydroxide, and tridodecylcarbomethoxymethyl ammonium bromide as the catalyst. The ethers are useful as solvents.
摘要:
A urea dewaxing process wherein normal paraffins are combined with aqueous urea solution in two, sequential, adduct-forming stages produces high purity normal paraffins. Employing fresh solvent washing of the adduct in both filtering steps permits the simultaneous production of low pour mineral oil and high purity normal paraffins.
摘要:
A PROCESS FOR PREPARING DICHLOROBUTENE WHICH COMPRISES REACTING TOGETHER BUTADIENE, HYDROGEN CHLORIDE AND OXYGEN AT A TEMPERATURE OF 80*C. TO 300*C. IN THE PRESENCE OF A CATALYST CONSISTING OF A COPPER SALT, PHOSPHORIC ACID AND AN ALKALI CHLORIDE OR OF A COPPER SALT AND AN ALKALI METAL PHOSPHATE WHICH CATALYST IS SUPPORTED ON A CARRIER.
摘要:
The method comprises the steps of reacting a gaseous mixture comprising butadiene and chlorine in at least a 2:1 molar ratio at a temperature from 150* to 280*C. in a first reaction zone wherein the gaseous reaction mixture is wholly agitated, and then in a second reaction zone wherein the gaseous reaction mixture is not significantly agitated.