摘要:
Hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof are dehydrated using a catalyst and a method to produce bio-acrylic acid, acrylic acid derivatives, or mixtures thereof. A method to produce the dehydration catalyst is also provided.
摘要:
Bio-based glacial acrylic acid, produced from hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof and having impurities of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof, is polymerized to poly(acrylic acid) or superabsorbent polymer using the same processes as petroleum-derived glacial acrylic acid.
摘要:
The invention relates to a method for producing catalyst moulded bodies whose active mass is a multi-element oxide, wherein a finely-divided precursor mixture is moulded to the desired geometry by adding a graphite having a specific particle size, and is subsequently thermally treated.
摘要:
Bismuth- and phosphorus-containing catalyst supports, naphtha reforming catalysts made from such supports, methods of making both support and catalyst, and a naphtha reforming process using such catalysts.
摘要:
An active and selective hydrocarbon partial oxidation catalyst comprises an activated partially-reduced polyoxometallate, preferably niobium polyoxomolybdate, that is prepared from a suitable polyoxoanion, which has been exchanged with a suitable cation and activated by heating to an activation effective temperature in the presence of a suitable reducing agent such as pyridinium. C3 and C4 hydrocarbons may be partially oxidized selectively to acrylic acid and maleic acid.
摘要:
Described are catalysts which are useful for the carbonylation of alcohols, ethers and ether alcohols to esters and, optionally, to carboxylic acids, by reaction thereof in the vapor state, said catalysts having the formulae
H[MW 12 PO 40 ] (a)
in which M is selected from Pd, Mn, Co, Ni and Zn;
Na 8 [Rh 2 W 12 O 42 ] (b)
RhW x Mo y PO 40 (c)
wherein the combinations x/y are selected from 8/4, 6/6, 4/8 and 2/10.
摘要:
Compositions conforming to the formula wherein A is a divalent metal, B is a trivalent metal, D is a polyanion, x,y,z and t are numbers greaterthan zero and n is a whole number preferably from 1 to 10 and the ratio of x:y is equal to or greater than 0.5 and less than or equal to 10 and a method for preparing said compositions are described.
摘要:
A process for producing methacrylic acid and/or methacrylic acid ester by oxidative dehydrogenation of isobutyric acid and/or isobutyric acid ester, wherein the improvement comprises using a catalyst having the composition represented by (where X denotes at least one element selected from the group consisting of lithium, beryllium, magnesium, barium, tin, lead, chromium, tungsten, and tellurium; subscripts a, b, c, d, e, f, and g each denote the ratio of the respective elements; b, c, d, e, and f are in the range of 0≦b≦3, 0.2≦c≦2,0.005≦d≦2,0.005≦e≦0.2, and 0≦f≦2, respectively, when a is 12, and the value of g is determined according to the ratio and valence of the other elements), and at least a part of the composition having the heteropoly acid structure.
摘要:
Hydrocarbon conversion catalyst comprising an active metallic component comprising at least one metal having hydrocarbon conversion activity and at least one oxygenated phosphorus component, and a support component comprising at least one porous refractory inorganic oxide matrix component and at least one crystalline molecular sieve zeolite component.