摘要:
A process for preparing C2 to C4 carboxylic acids from synthesis gas includes introducing a feed stream comprising hydrogen gas and a carbon-containing gas comprising carbon monoxide into a reaction zone of a first reactor, converting the feed stream into an intermediate stream comprising C2 to C4 hydrocarbons in the reaction zone in the presence of a first catalyst, wherein the intermediate stream further comprises carbon dioxide and wherein the first catalyst is a composite catalyst comprising a metal oxide catalyst component and a microporous catalyst component, and converting the intermediate stream into a product stream comprising C2 to C4 carboxylic acids in the presence of a second catalyst in a second reactor. The second reactor can be configured for olefin oxidation or paraffin oxidation.
摘要:
This invention relates to a one step process of oxidizing a natural or synthetic non-benzenoid hydrocarbon wax in the presence of a metal oxide or hydroxide, such as potassium, sodium or lithium oxide or hydroxide, and to the product formed by such oxidation.
摘要:
The oxidation of hydrocarbon waxes to corresponding fatty acids through the use of conventional catalysts and oxidizing gases such as air is promoted by the addition of quaternary ammonium and phosphonium salts to the catalyst-wax mixture.
摘要:
The method disclosed herein relates to two stage catalytic processes for converting syngas to acetic acid, acrylic acid and/or propylene. More specifically, the method described and claimed herein relate to a method of producing acrylic acid and acetic acid comprising the steps of: a) providing a feedstream comprising syngas; b) contacting the feedstream with a first catalyst to produce a first product stream comprising C2-C3 olefins and/or C2-C3 paraffins; and c) contacting the first product stream with oxygen gas and a second catalyst, thereby producing a second product stream comprising acrylic acid and acetic acid, wherein there is no step for separating the components of the first product stream before the first product stream is contacted with the second catalyst.
摘要:
The aliphatic carboxylic acids, e.g., acetic acid, are selectively prepared, even on an industrial scale, by controlledly oxidizing the corresponding alkanes, e.g., ethane, with a source of oxygen, in the presence of a catalytically effective amount of an advantageously supported heteropolyacid catalyst having the formula (I):[A.sub.a B.sub.b ].sub.f [C.sub.c D.sub.d E.sub.e O.sub.x ].sup.f-(I)in which A is at least one monovalent cation selected from among hydrogen, an alkali metal, or the ammonium ion; B is VO.sup.2 +, VO.sup.3 +, an alkaline earth metal ion, or an ion of a metal of Groups VII A, VIII, I B, IV B and V B of the Periodic Table; C is Mo and/or W; D is phosphorus, arsenic, antimony, silicon, germanium and/or boron; E is vanadium, optionally in combination with at least one metal of Groups V A, VII A and VIII of the Periodic Table or chromium; f=a+.alpha.b wherein .alpha. depends on the charge of the ion B, which is equal to 2, 3 or 4; c is a number ranging from 5 to 20-e; d is a number ranging from 1 to 5; and e is a number ranging from 1 to 9.
摘要翻译:通过在催化有效量的有利负载的杂多酸的存在下,通过有选择地制备脂肪族羧酸,例如乙酸,即使在工业规模上,通过可控地氧化相应的烷烃,例如乙烷与氧源 具有式(I)的催化剂:[AaBb] f [CcDdEex] f-(I)其中A是选自氢,碱金属或铵离子中的至少一种一价阳离子; B是VO2 +,VO3 +,碱土金属离子或元素周期表第VIIA,VIII,IB,IVB和VB族金属的离子; C是Mo和/或W; D是磷,砷,锑,硅,锗和/或硼; E是钒,任选地与元素周期表第ⅤA,ⅦA和Ⅷ族的至少一种金属或铬组合; f = a +αb其中α取决于离子B的电荷,其等于2,3或4; c为5〜20-e的数字; d为1〜5的数字; e是从1到9的数字。
摘要:
Hydrocarbon waxes are oxidized to high acid numbers by agitating the liquid hydrocarbon wax with a sulfobetaine while forcing gaseous air or oxygen through the liquid charge.
摘要:
Hydrocarbon waxes are oxidized to high acid numbers by agitating the liquid hydrocarbon wax with an amine oxide while forcing gaseous air or oxygen through the liquid charge.