Abstract:
The invention pertains to a method of making urea-containing particles wherein with a lower degree of cooling, high mechanical strengths are obtained. The method comprises the steps of (a) providing a first polymer 10 layer; (b) feeding urea droplets onto said first polymer layer, (c) cooling the droplets provided on the first polymer layer to a temperature between 55º C and 120º C; (d) applying a second polymer layer onto the first polymer layer comprising the droplets so as to form encapsulated urea droplets; and (e) separating the encapsulated urea droplets.
Abstract:
The present invention relates to a process for producing a hydrogen containing gas mixture comprising the following steps: (i) providing a preheated mixture comprising a fossil fuel, preferably methane, and steam, (ii) conducting an adiabatic reaction between the fossil fuel and the steam, in the presence of a catalyst, wherein a first reaction product mixture is formed comprising methane, hydrogen and carbon dioxide, and (iii) conducting an oxygen-assisted reforming reaction in the presence of a catalyst between said first reaction product mixture and an oxygen comprising stream, wherein the oxygen comprising stream comprises at least 40 vol% oxygen, forming a second reaction product mixture comprising hydrogen and carbon monoxide. The invention also relates to a system suitable for hydrogen production from a hydrocarbon feed according to the present invention.
Abstract:
Disclosed is a process for the direct alkylation of aromatic compounds with alkanes. To this end a judicious catalyst combination is provided. The composition comprises palladium as a catalytically active metal, and zinc as a promoter, or a metal such as tin having a comparable promoting action. The metals are contained in a zeolite support, or a similar support of a metal organic framework type or a silico alumino phosphate type.
Abstract:
Disclosed is a process for the catalytic dehydrogenation of alkanes so as to form the corresponding olefins. The reaction mixture is subjected to membrane separation of hydrogen, in a separate unit. Preferably a plurality of alternating reaction and separation units is used. The process of the invention serves the purpose of reducing coke formation on the catalyst, and also of achieving a higher alkane conversion without a similar increase in coke formation. The process can also be used for the production of hydrogen.
Abstract:
A method for startup and management of a combined cycle heating system for the production of power includes the execution of several functional units according to a predefined sequence.
Abstract:
Batch reactor comprising a reaction vessel that is longitudinally shaped and has a side wall that encloses a reaction space of the reaction vessel. The reaction vessel is arranged for holding in the reaction space a reaction mixture that comprises polyamide and/or a liquid monomer composition. The reaction further has a bottom wall that further encloses the reaction space. The side wall extends in a longitudinal direction of the reaction vessel that is, in use, directed upwards. The batch reactor has an outer heat exchanger for exchanging heat with the reaction space for enabling a polymerization reaction. The outer heat exchanger covers at least a part of the side wall. The batch reactor comprises an inner heat exchanger that is provided in the reaction space. The inner heat exchanger is, at least partly, surrounded by the outer heat exchanger. The batch reactor comprises an agitator for transporting the reaction mixture.
Abstract:
Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.
Abstract:
The invention relates to crosslinked oriented high molecular weight polyethylene, containing up to 30 % (wt) crosslinked poly-1,4-butadiene. The poly-1,4-butadiene preferably consists for at least 90 % (mole) of poly-trans-1,4-butadiene. The invention also relates to a process for preparing articles from such polyethylene.
Abstract:
The invention relates to a water-soluble resin that can be used as a dispersant. The resin is substantially built up from units of: A) polyethylene glycol with (5-100) ethylene oxide units, B) a compound containing one or more allyl and/or (meth)acrylate groups and C) the reaction product of one or more unsaturated fatty acids or one or more polyalcohol(s) wholly or partly esterified with unsaturated fatty acids with a compound, where the A:C molar ratio is between 0.5:1 and 4:1 and the B:C molar ratio is between 0.5:1 and 4:1.
Abstract:
Thin self-supporting green compact, less than 25 mu thick, containing an inorganic substance and as a binder a polymer with a weight average molecular weight of more than 400,000, which polymer in a suitable solvent can form a thermoreversible gel above room temperature, the volume fraction of the inorganic substance being more than 45 % relative to the total amount of binder plus inorganic substance and a process to prepare such green compacts.