Abstract:
In the preparation of ethylbenzene hydroperoxide by reacting ethylbenzene with molecular oxygen, selectivity and reaction rate are improved by incorporating in the oxidation mixture a small amount of a hydroxide or salt of sodium or potassium.
Abstract:
A catalyst composition useful for the oxidation of olefins, particularly the oxidation of propylene and isobutylene to produce the corresponding unsaturated aldehydes acrolein and methacrolein, respectively, comprises the combination of oxides of molybdenum, cobalt, iron, bismuth, thallium and antimony, and preferably also silicon. When the catalyst is used for the vapor-phase oxidation of the olefins with molecular oxygen, the aldehydes are produced with high selectivity. Alcohol precursors for the olefins can be used as feed instead of the olefins themselves.
Abstract:
A carboxylic acid anhydride such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of a halide, carbon monoxide and a Group VIII noble metal in the presence of promoters comprising at least one metal of Groups IVB, VB, and VIB or a non-noble metal of Group VIII, or their compounds and an organo-nitrogen compound or an organo-phosphorus compound wherein the nitrogen and phosphorus are trivalent.
Abstract:
Ethylene glycol or 1,2-propylene glycol contained in mixtures with lower carboxylate esters of the glycol are separated from such mixtures by fractional distillation of the mixtures with the addition to the lower portion of the distillation zone of aqueous formic acid and/or acetic acid.
Abstract:
Olefins are oxidized to produce the corresponding epoxides by means of an aryl thallic carboxylate in the presence of an inert polar organic solvent and in the presence of water, the novel compound thallic benzoate being a preferred reactant.
Abstract:
A carboxylic acid anhydride, such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of an iodide, carbon monoxide and a nickel-chromium catalyst in the presence of a promoter comprising an organo-nitrogen compound or an organo-phosphorus compound wherein the nitrogen and phosphorus are trivalent.
Abstract:
A polyhydric compound is produced by catalytically disproportionating a precursor which is a lower carboxylate ester of said compound containing at least one lower carboxylate group and at least one free hydroxyl group. Most preferably the invention relates to the production of a diol by the catalytic disproportionation of a lower carboxylate diester of the diol.
Abstract:
Acrylonitrile is dimerized by reaction in the presence of a catalyst consisting essentially of (a) at least one metal compound of the formula M(X).sub.n wherein M is Zn or Co, X is an anion derived from an alkyl or aryl sulfonic acid or from a carboxylic acid containing at least two carbon atoms which is substituted by at least one of the groups, --F, --Cl, --Br, --I and --CN in the .alpha.-C-position relative to the acid group and n is a number equal to the valence of the metal M divided by the number of acid equivalents of X and (b) at least one nitrogen-containing Lewis Base which is (1) a tertiary monoamine of the formula ##EQU1## wherein R.sup.1, R.sup.2, and R.sup.3 are the same or different and each is an alkyl, cycloalkyl, benzyl or aryl radical; or (2) a tertiary di- or poly-functional amine which contains at least two Lewis Base nitrogen groups separated from each other by at least one carbon atom, and which are (a) N-disubstituted amino groups wherein each N-substituent is the same or different and is an alkyl, cycloalkyl, benzyl or aryl radical, or (b) N-heterocyclic groups containing 3 to 20 carbon atoms; or (3) an N-substituted heterocyclic amine containing 3 to 20 carbon atoms in the heterocyclic ring wherein the N-substituent is an alkyl, cycloalkyl, benzyl or aryl radical.
Abstract translation:丙烯腈在基本上由(a)至少一种式M(X)n的金属化合物(其中M是Zn或Co,X是衍生自烷基或芳基磺酸的阴离子)或 由相对于酸基的α-C-位中的至少一个基团-F,-Cl,-Br,-I和-CN取代的至少两个碳原子的羧酸,n是 金属M的化合价除以X的酸当量数,和(b)至少一种含氮路易斯碱,其为(1)式R 2 R 1 -N ANGLE R 3的叔胺,其中R 1 ,R2和R3相同或不同,各自为烷基,环烷基,苄基或芳基; 或(2)含有至少两个由至少一个碳原子彼此分开的路易斯碱氮基团的叔二 - 或多官能胺,它们是(a)N-二取代的氨基,其中每个N-取代基是 相同或不同,为烷基,环烷基,苄基或芳基,或(b)含有3-20个碳原子的N-杂环基; 或(3)在杂环中含有3-20个碳原子的N-取代杂环胺,其中N-取代基是烷基,环烷基,苄基或芳基。
Abstract:
When vicinal glycol esters are prepared by the liquid phase reaction of (a) ethylene or propylene, (b) molecular oxygen and (c) a carboxylic acid in the presence of a catalyst system which is tellurium cation plus bromide anion or selenium cation plus chloride anion or selenium cation plus bromide anion, significant improvements in selectivity and operability are obtained by employing, in conjunction with these catalyst systems, a basicity control cation of specified characteristics. This cation is employed in an amount at least sufficient to provide at least 0.05 equivalent of cation per gram-atom of halogen present.
Abstract:
Esters of C2-C3 vicinal glycols with C1-C5 hydrocarbon carboxylic acids are at least partially freed from organic halogen compound impurities by introducing the impuritycontaining glycol esters into contact with compounds of selected metals, the ratio of total equivalents of metal to total equivalents of halogen during such contact being in excess of 1: 1. Following such contact, the vicinal glycol ester possesses a reduced concentration of organo-halogen compound impurities and can readily be separated from inorganic halogen residues.