Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Asahi-Dow Limited

Yoshihiko Mori

Isamu Iwami

Yoshiharu Kitahama

Sumitaka Nogami

Tokio Sakurai

Tatsuro Iwabuchi

Hiroshi Endo

Yasujiro Fujii

Kyosuke Komiya

The present invention relates to a water treatment process comprising adding ozone to raw water and filtering the raw water using an ozone-resistant membrane, wherein a concentration of ozone present in the water filtered through the ozone-resistant membrane is detected and an amount of ozone to be fed into raw water is continuously and automatically controlled so as to adjust an ozone concentration to a prescribed value.

Water treating method

Disclosed is an electroluminescent element comprising an anode, a cathode and, disposed therebetween, an organic luminescent layer comprising a mixture of a fluorescent luminescent agent, at least one hole moving and donating agent capable of moving holes and donating the same to the luminescent agent and at least one electron moving and donating agent capable of moving electrons and donating the same to the luminescent agent. In the element, the components of the luminescent layer have specific oxidation potential and reduction potential relationships. The element emits light in response to electrical signals. The element exhibits high luminescence efficiency and brightness even at low voltages, and it can efficiently be produced at low cost.

Electroluminescent element

This invention relates to a layered photoconductor having a charge generating layer and a charge transfer layer superimposed on an electroconductive substrate, which photoconductor has as the main component of the charge generating layer an aluminum phthalocyanine derivative which is represented by the formula, AlC.sub.32 N.sub.8 H(17-x)Cl.sub.x (wherein x=1.0 to 3.0), has the loss of weight on heating of 6.+-.0.5% by weight, shows strong X-ray diffraction peaks at 6.7 degrees, 11.2 degrees, 16.7 degrees, and 25.6 degrees, and shows the maximum absorption of the visible absorption spectrum in a wavelength range of 640 nm to 660 nm or 750 nm to 850 nm. The photoconductor according to this invention is highly sensitive without suffering from dispersion of performance, exhibits high sensitivity in various ranges of wavelength, and does not cause fogging in actual printing.

Electrophotographic photoconductor using aluminum phthalocyanine

Manufacture of orthomethylated phenol compounds by the reaction of phenol compounds having a hydrogen atom at the ortho position and methanol is accomplished advantageously by a method which effects the reaction by use of a catalyst comprising (A) iron oxide, (B) indium oxide, and (C) at least one member selected from the group consisting of chromium oxide and silicon oxide. According to this method, the reaction permits the orthomethylated phenol compound to be produced in high yields for a long time because of the catalyst's excellent activity-retaining property. Since the ortho-position selectivity and the utilization ratio of methanol are high and, consequently, the utilization efficiency of raw materials is high, the method of this invention produces the orthomethylated phenol compound with high efficiency from the phenol compounds.

Method for manufacture of orthomethylated phenol compounds

Growing community of inventors

Kawasaki, Japan

Yoshihiko Mori