116 results about "Propadiene" patented technology

A fuel containing methylacetylene-propadiene, commonly referred to as MAPP gas, produces thrust in a flight vehicle having a pulse detonation engine. The MAPP gas fuel of this invention may be used alone or combined with other conventional fuels such as hydrogen, JP-4, JP-5, JP-10, kerosene or any other suitable hydrocarbon fuel. Such hydrocarbon containing fuel includes, but is not limited to, acetylene, methane, ethylene, propane, butane or liquified petroleum gas. MAPP gas fuel is mixed with an oxidant containing oxygen or air and ignited. The detonation wave created produces thrust for the flight vehicle. A method of powering a flight vehicle having a pulse detonation engine with MAPP gas fuel is also disclosed.

The invention discloses a method for separating propylene, propyne, propane and propadiene from a mixed gas. The method comprises: separating a mixed gas containing propylene, propyne, propane and propadiene by using a metal organic framework material as an adsorbent to obtain the gases of each single component, wherein the structural general formula of the metal organic framework material is [M(C4O4)(H2O)].1.5H2O, M is a metal ion, and transition metal ions or alkaline earth metal ions and squaric acid form a three-dimensional network structure through a coordination bond or intermolecular force. According to the present invention, the metal organic framework material has excellent adsorption separation selectivity to propylene, propyne, propane and propadiene, further has characteristicsof cheap and easily available raw materials, simple preparation process, low cost, good regeneration property and good repeatability, can maintain the original adsorption effect after vacuum or heating regeneration, and has broad industrial application prospects.

The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetylene, methyl acetylene, propadiene, methane, hydrogen, carbon monoxide, carbon dioxide and C4+ components. In one embodiment, the initial effluent stream is provided from a methanol-to-olefin reaction system. It has been discovered that an efficient separation of these components is realized when DME is partially removed in a first separation step comprising methanol and water washing steps, followed by separation of the remaining components in additional separation steps.

The invention discloses a process for carrying reaction, rectifying and coupling to selectively hydrogenate to remove MAPD (Methylacetylene Propadiene) from refined propylene. A C3 fraction directly enters a propylene rectification tower or enters the propylene rectification tower after being pre-transformed by a first MAPD reactor; the MAPD is enriched into a stripping section and a tower kettlein the propylene rectification tower; and liquid is collected from a higher MAPD concentration position in the propylene rectification tower, is mixed with hydrogen to enter a second MAPD reactor andthen return to the propylene rectification tower. The treatment of the C3 fraction realizes the effective separation of the propylene and the MAPD, thereby increasing the selectivity of converting the MAPD into the propylene and realizing the purpose of increasing the yield of the propylene. In addition, the requirement of catalyst activity in the MAPD converting process is greatly reduced.

The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of a noble metal-containing titanium or vanadium zeolite and a modifier selected from the group consisting of carbon monoxide, methylacetylene, and propadiene. The process results in significantly reduced alkane by-product formed by the hydrogenation of olefin compared to processes that do not use the carbon monoxide, methylacetylene, and / or propadiene modifier.

The present invention discloses a selective hydrogenation method for a liquid phase of a carbon fractionation, which relates to a selective hydrogenation method to prepare propylene by propine and or propadiene included in the carbon fractionation from the tower top of depropanization in the manufacturing process for propylene. The method is that: the carbon fractionation is firstly mixed with hydrogen, and then the mixture enters a reaction device from the top of the reaction device; after being made with the selective hydrogenation reaction, the heat material from the bottom of the reactiontower (the mixture between the liquid and the gas) does not take the heat exchange process, and directly enters an air-liquid separated pot to be separated. The air-phase part enters a condensator arranged on or on the upper part of the separated pot; the liquid after being condensed is taken as a product to be inducted; the non-condensed air-phase part discharges or is sent to a fuel air-tube net or the entrance of the second section or the third section or the fourth section of a compressor; the pressure inside of the reaction device is adjusted by controlling the temperature in the consensator or by controlling the air-phase flow for the discharging.