摘要:
A novel process is described for the production of aliphatic ketones and an optional consequetive production of the corresponding carbinols. The starting reactants comprise ketones or aldehydes or compounds capable of converting to these in situ, such as alcohols. The reaction takes place in the presence of hydrogen in a selective temperature range, utilizing a catalyst comprising copper oxide.
摘要:
An improved process for the production of methyl ethers of the type in which methanol is reacted with a branched monoolefin in the presence of a catalytically effective amount of one or more acid catalyst, said improvements comprising carrying out said reaction in one or two steps in the presence of one or more liquid organic compounds having one or more hydroxy substituents which functions as a carrier for the branched monoolefins. The hydroxy compound also inhibits the polymerization of the branched monoolefins.
摘要:
Methanol is reacted with branched monoolefins such as isobutylene, or mixtures of hydrocarbons such as mixed C-4's from or in a refinery, in the presence of methanesulfonic acid. A column (10) operation is described wherein methanesulfonic acid (11) and methanol (12) are fed in countercurrent fashion to hydrocarbons (13). Crude product ether is removed as a liquid sidestream (25) above the feed of methanesulfonic acid (11), while hydrocarbons depleted of the reactive branched monoolefins (24) are removed overhead. The methanesulfonic acid suppresses the vapor pressure of methanol relative to product ether.
摘要:
An improved process for the production of methyl ethers of the type in which methanol is reacted with a branched monoolefin in the presence of a catalytically effective amount of one or more acid catalyst, said improvements comprising carrying out said reaction in one or two steps in the presence of one or more liquid organic compounds having one or more hydroxy substituents which functions as a carrier for the branched monoolefins. The hydroxy compound also inhibits the polymerization of the branched monoolefins.
摘要:
Novel fluorogenic and chromogenic three-dimensional ionophores are provided which selectively bond ions such as potassium, sodium, and lithium, even in neutral aqueous or alcohol media. The novel ionophores comprise an "ion-recognizing system" fused to a "signal-moiety" through one or more heteroatoms having a non-bonded electron pair. The signal-moieties are selected from the group consisting of fused ring heterocyclics, fused aromatics, and subsituted aromatics having at least one nitro or azo moiety. The ion-recognizing system is a three-dimensional cryptand. The ionophores are ideal for the selective and direct termination of ions in biological or environmental samples and the like.
摘要:
Novel fluorogenic ionophores have been synthesized which selectively bind ions such as potassium and sodium, even in neutral aqueous and alcoholic media and respond to such binding by fluorescence quenching or enhancement. These ionophores are ideal for the selective and direct determination of ions in biological or environmental samples and the like. The ionophores are also suitable for incorporation into fiber optic-based sensors for the continuous in vivo or in vitro monitoring of metal ions in blood or other biological fluids.
摘要:
Processes for the autoxidative cleavage of selected ketones such as C.sub.4 -C.sub.10 cycloalkanones having at least one hydrogen or at least one R group on a carbon alpha to the carbonyl carbon or aryl alkyl ketones having the formula III ##STR1## comprising contacting a liquid phase comprising said ketone with elemental oxygen gas, preferably air, in the presence of a pulverized alkali metal hydroxide at a temperature of no more than 50.degree. C. for a time sufficient to produce an oxidized product are disclosed. Preferred cycloalkanones, 2-alkyl- and 2-arylcyclohexanone are autoxidized in pulverized sodium hydroxide/dimethoxyethane to produce 6-alkyl- or 6-aryl-6-oxohexanoic acids, respectively.
摘要:
A process for preparing extended chain polyesters, and block or graft polyester or copolyesters by forming an intimate mixture of one or more polyesters and an effective amount of one or more phosphite compounds, and thereafter heating the intimate mixture at a temperature and for a time sufficient to form the desired amount of the desired polyester or co-polyester.
摘要:
Beta pinene is converted to alpha pinene in liquid sulfur dioxide. The process is a regioselective isomerization of organic compounds having a carbon-carbon double bond at a tertiary carbon atom, by sulfur dioxide-induced allylic rearrangement of a hydrogen atom and/or replacement of a proton in the allylic position by a deuteron. The organic compound is contacted with sulfur dioxide at temperatures between about 0.degree. and 70.degree. C. for a time sufficient to effect such isomerization to a more stable isomer; and if deuteration is to take place D.sub.2 O is provided in the solution.
摘要:
The present invention is directed to a process of oxidizing organic compounds having benzylic carbon atoms. The process of this invention comprises reacting an organic compound having one or more benzylic carbon atoms with an effective amount of an effective oxidizing agent in water at a temperature equal to or greater than about 350.degree. C. and at a pressure equal to or greater than about 175 atmospheres, wherein said agent is selected from the group consisting of a combination of one or more bases and one or more of elemental sulfur, an oxidized form of elemental sulfur and/or an organic or inorganic sulfur containing compounds capable of forming elemental sulfur, said oxidized forms or a combination thereof in situ under process conditions, and organic or inorganic compounds which form one or more bases and elemental sulfur, oxidized forms of sulfur or a combination thereof in situ under process conditions.