Ngk Insulators, Inc.

Naoto Kinoshita

Hiroyuki Shibata

Makoto Miyahara

Makiko Ichikawa

Akimasa Ichikawa

Kenichi Noda

Kenji Yajima

Kenji Suzuki

Hideyuki Suzuki

Manabu Isomura

Takeshi Hagio

Katsuya Shimizu

Tetsuya Sakai

Yoshinori Isoda

Takafumi Kimata

Naoko Inukai

A zeolite membrane composite includes a porous support and a zeolite membrane formed on the support. The zeolite membrane includes a low-density layer that covers the support, and a compact layer that covers the low-density layer. The compact layer has a higher content of a zeolite crystalline phase than the low-density layer. By in this way forming the compact layer on the low-density layer that covers the support, the thin compact layer with no defects can be formed more easily than in the case where a compact layer is formed directly on a support.

Zeolite membrane composite, method of producing zeolite membrane composite, and separation method

A zeolite membrane complex includes a porous support, and a zeolite membrane formed on the support. The zeolite membrane includes a zeolite crystal phase constituted by a plurality of zeolite crystals, and a dense grain boundary phase, which is a region between the plurality of zeolite crystals. A density of at least part of the grain boundary phase is smaller than a density of the zeolite crystal phase. A width of the grain boundary phase is 2 nm or more and 10 nm or less. Accordingly, it is possible to realize high permeability and high separating performance, and high durability of the zeolite membrane.

Zeolite membrane complex, method for producing zeolite membrane complex, and separation method

A DDR-type zeolite seed crystal has an average particle diameter of less than or equal to 0.2 &#x3bc;m, and an average aspect ratio of less than or equal to 1.3.

DDR-type zeolite seed crystal and method for manufacturing DDR-type zeolite membrane

A zeolite film structure comprising a support, a zeolite film and a protective film. The zeolite film is formed on a surface of the support. The protective film is formed on a surface of the zeolite film. The protective film is configured from organic-nonorganic hybrid silica or carbon. An average thickness of the protective film is less than or equal to 172 nanometers and greater than or equal to 44 nanometers.

Zeolite film structure

A structural bodyincludes a porous partition portionforming a plurality of cellseach of which is used as a flow path of a mixed gas as a fluid; a function layerprovided on each inside surfaceof the partition portion; a protective layerprovided on each inside surface end portionof the inside surface; and a sealing portionprovided on each end surfaceof the partition portion. The function layercontains metal ions, and is transformed by light. The protective layeris a length B (mm) from an end surfaceof the structural bodyand a maximum length A (mm) of an opening of the cellsatisfy the relationship of B/A&#x2265;0.4.

Structural body

A separation membrane structure comprising a porous support, a first glass seal, and a separation membrane. The porous support includes through-holes which connect a first end surface and a second end surface. The first glass seal is configured to cover the first end surface. The separation membrane is formed on an inner surface of the through-holes. The first glass seal has a first seal body part and a first extension part. The first seal body part is disposed on the first end surface. The first extension part is connected to the first seal body part and disposed on the inner surface of the through-holes. The separation membrane has a first connection part connected to the first extension part of the first glass seal. A first thickness of the first connection part is less than or equal to 10 microns, and less than or equal to 3.2 times a center thickness at a longitudinal center of the separation membrane.

Separation membrane structure and method for manufacturing same

The organic-inorganic composite of the present invention includes an organic compound having a carbonyl group, an inorganic compound containing a metal component, and a silver component. The ratio of the number of metal atoms in the inorganic compound to the number of carbon atoms in the organic compound is from 0.04 to 1.60, and the ratio of the number of silver atoms in the silver component to the number of carbon atoms in the organic compound is from 0.07 to 0.55. The organic-inorganic composite may include, for example, an inorganic compound having a metal matrix structure containing a metal M and oxygen, an organic compound having a carbonyl group, and silver ions. The carbonyl group is bonded to a side chain Rof the organic compound and has an end group R.

Organic-inorganic composite, structural body, and method for producing organic-inorganic composite

There is disclosed a ceramic separation membrane. This ceramic separation membrane includes a porous substrate, and a separation layer formed on the substrate. The separation layer is a laminate having an outermost layer positioned on the most surface side, and a base layer positioned in a lower layer than the outermost layer and made of zeolite. The outermost layer is a layer made of a siliceous material containing 90 mol % or more of silica, an organic material-containing amorphous silica material having a Si&#x2014;Cn&#x2014;Si (wherein n is 1 or 2) bond and a Si/C ratio of 0.5 to 2, or a carbonaceous material containing 90 mass % or more of carbon. The outermost layer is different from the base layer.

Ceramic separation membrane and dehydration method

Provided is a separation membrane manufacturing method capable of easily manufacturing a dense separation membrane. The separation membrane manufacturing method comprises a membrane forming step of forming a separation membrane precursor containing a separation membrane precursor solution on the surface of cells formed in a porous monolith substrate; and a drying step of performing ventilation drying by passing hot air through the cells having the separation membrane precursor in the monolith substrate to dry the separation membrane precursor. During the ventilation drying in the drying step, the temperature of the monolith substrate having the separation membrane precursor is raised to 90&#xb0; C. within 15 minutes from the start of the passing of the hot air at such a rate of temperature rise that an average rate of temperature rise is 7&#xb0; C./min or more from the start of the passing of the hot air until the temperature reaches 90&#xb0; C.

Separation membrane manufacturing method

A carbon membrane formed by carbonizing a phenol resin having at least one kind of atomic groups among a methylene bond, a dimethylene ether bond, and a methylol group, wherein the total mole content of the atomic groups is 100 to 180% with respect to the phenolic nuclei. A pervaporation separation method using the carbon membrane is also disclosed.

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Nagoya, Japan

Naoto Kinoshita