A method and device for producing a solution of polyphosphoric acid from a feed solution P0 by the wet method is provided. An enriched phosphoric acid solution optionally mixed with a direct feed solution is pulverised in a flame of a combustion chamber in order to form the polyphosphoric acid solution. The combustion gases from the combustion chamber are placed in contact with the feed solution in a gas-acid contactor in order to increase the temperature and the P.sub.2O.sub.5 concentration thereof and thus to form an enriched phosphoric acid solution. A portion of the enriched phosphoric acid solution is conveyed with a flow rate of Qp into the combustion chamber in order to be pulverised in the flame. The rest of the enriched phosphoric acid solution is conveyed into a recirculation loop in order to be reinjected into the gas-acid contactor with a flow rate of Q2. The ratio of Qp/(Qp+Q2) is controlled with a predefined value.

A tower packing element (100), a tower packing (300), a packing tower, and a mixer including the tower packing element (100) are provided. The tower packing element (100) are manufactured by a deformed plate and includes a plurality of strip assemblies (10) arranged along a longitudinal direction of the tower packing element (100) and a connecting plate portion (20) connected between adjacent strip assemblies (10). Each of the strip assemblies (10) defines a central passage (30) therein, and the central passage (30) is extended in a lateral direction of the tower packing element (100). The connecting plate portion (20) is extended along the lateral direction of the tower packing element (100). The adjacent strip assemblies (10) and the connecting plate portion (20) connected therebetween define a side passage (40) parallel to the central passage (30).

A tower packing element (100), a tower packing (300), a packing tower, and a mixer including the tower packing element (100) are provided. The tower packing element (100) are manufactured by a deformed plate and includes a plurality of strip assemblies (10) arranged along a longitudinal direction of the tower packing element (100) and a connecting plate portion (20) connected between adjacent strip assemblies (10). Each of the strip assemblies (10) defines a central passage (30) therein, and the central passage (30) is extended in a lateral direction of the tower packing element (100). The connecting plate portion (20) is extended along the lateral direction of the tower packing element (100). The adjacent strip assemblies (10) and the connecting plate portion (20) connected therebetween define a side passage (40) parallel to the central passage (30).

The present invention relates to a process for purifying ethoxyquin by distillation, to high-purity ethoxyquin obtainable by means of distillative purification and to the use thereof, particularly as additive in foodstuffs and feedstuffs.

The present invention discloses intelligent temperature control equipment for the preparation of liquid sodium methoxide, and belongs to the technical field of temperature control equipment. The intelligent temperature control equipment sequentially includes a feeding hopper, a throat pipe, a shunting hood, a second shell and a third shell which are sequentially connected from top to bottom, wherein a first coil pipe, a second coil pipe and a third coil pipe are mounted on the outer sides of the feeding hopper, the second shell and the third shell, respectively; a discharging pipe is connected to the bottom of the third shell, and a plurality of air inlet pipes is mounted on one side of the discharging pipe; corrugated packing is disposed on the inner side of the second shell.

The present invention discloses intelligent temperature control equipment for the preparation of liquid sodium methoxide, and belongs to the technical field of temperature control equipment. The intelligent temperature control equipment sequentially includes a feeding hopper, a throat pipe, a shunting hood, a second shell and a third shell which are sequentially connected from top to bottom, wherein a first coil pipe, a second coil pipe and a third coil pipe are mounted on the outer sides of the feeding hopper, the second shell and the third shell, respectively; a discharging pipe is connected to the bottom of the third shell, and a plurality of air inlet pipes is mounted on one side of the discharging pipe; corrugated packing is disposed on the inner side of the second shell.

A method for facilitating the distribution of the flow of one or more streams within a bed vessel is provided. Disposed within the bed vessel are internal materials and structures including multiple operating zones. One type of operating zone can be a processing zone composed of one or more beds of solid processing material. Another type of operating zone can be a treating zone. Treating zones can facilitate the distribution of the one or more streams fed to processing zones. The distribution can facilitate contact between the feed streams and the processing materials contained in the processing zones.

A method for facilitating the distribution of the flow of one or more streams within a bed vessel is provided. Disposed within the bed vessel are internal materials and structures including multiple operating zones. One type of operating zone can be a processing zone composed of one or more beds of solid processing material. Another type of operating zone can be a treating zone. Treating zones can facilitate the distribution of the one or more streams fed to processing zones. The distribution can facilitate contact between the feed streams and the processing materials contained in the processing zones.

Provided is a method of producing a zeolite film continuously and efficiently.

Zeolite is formed on a surface of a support using a method including: a first step of attaching zeolite fine crystals to a surface of a support; a second step of preparing synthetic gel for growing the fine crystals; a third step of putting the support and the synthetic gel into a reactor and performing hydrothermal synthesis; and a fourth step of cleaning the support subjected to the hydrothermal synthesis, in which in the third step, multiple containers arranged to be movable in a constant-temperature apparatus are each used as the reactor, the temperature and pressure for the hydrothermal synthesis is adjusted by the temperature and pressure in the constant-temperature apparatus, and the reaction time of the hydrothermal synthesis is adjusted by setting the time from when the reactor enters the constant-temperature apparatus to when the reactor exits the constant-temperature apparatus.

An annular divided wall column is provided. The annular divided wall column includes a first annular column wall and a second annular column wall disposed within the first annular column wall and radially spaced therefrom to define an annulus column region as the space between the first annular column wall and the second annular column wall. An interior core column region is also defined by the interior space of the second annular column wall. The present annular divided wall column further includes a plurality of packing elements, disposed within the interior core column region within the annulus column region having different surface area densities and optionally, also have different geometries.