Softard Industries Co., Ltd.

Other

Renesas Electronics Corporation

Namco Limited

Nippon Petroleum Refining Company, Limited

Kashima Engineering Co., Ltd.

Junichi Takano

Katsuhiko Kawakami

Takashi Sato

Nobuyoshi Sawamura

Isamu Kubota

Guiqing Xu

Masayuki Shoji

Tokuo Naitou

Toshihiko Nasu

Toyoo Kaijima

Yuji Yoshizumi

Tomiyasu Hirachi

Hidekatsu Honda

Illumination devices () and () which irradiate light having a wavelength of 1.1 &#x3bc;m or less are arranged on a front surface and a rear surface of a cover () of a dicing device (). After a wafer is placed on a dicing stage (), when the wafer is diced by a blade () attached to a spindle (), light is irradiated on an entire surface of an upper surface (element forming surface) of the wafer by the illumination devices () and (). At this time, an illuminance of light on the wafer is set at 70 lux or more and 2000 lux or less. By this means, during a dicing operation, an area to be a light-shielded area by the spindle () or the like is not present on the wafer.

Light illumination during wafer dicing to prevent aluminum corrosion

A cooling method of a hydrotreating plant having a desulfurization section () including a furnace () for heating liquid to be processed, reactors () for hydrotreating sulfur to generate hydrogen sulfide, a hydrogen sulfide absorber () for absorbing the hydrogen sulfide generated in the reactors (), and a compressor () for compressing and transferring fluid from the hydrogen sulfide absorber () toward the reactors (), the cooling method comprising the steps of gradually depressurizing the hydrotreating plant at the desulfurization section () to a pressure level at which reactor material does not embrittle and gas does not leak due to difference of mechanical thermal expansion in the plant after stopping supply of the liquid to be processed, operating the compressor () approximately at the maximum rotation number, and completely extinguishing burners (A,B) in the furnace () during plant shutdown operation.

Cooling method of hydrotreating plant and cooling unit therefor

There is provided a received-light pattern detection apparatus capable of reading received-light pattern data within a period of time shorter than a read interval of a video game, including a transfer time. A received-light pattern detection apparatus for detecting a received-light pattern representing the position of an object on the front surface of a monitor includes a detection section having photo-couplers arranged around the periphery of the monitor and a plane detection surface formed from the photo-couplers; timing control circuits for controlling a driving timing of the detection section; a read control circuit formed by means of connecting the timing control circuits in the form of a cascade; and an input/output interface for converting the received-light pattern data read from the read control circuit into a switch packet and transmitting the switch packet.

Received-light pattern detection apparatus

A repairing method of a petroleum refining plant for efficiently conducting cleaning process of process equipment and pipings, unloading process of agglomerated catalyst, rinsing work of the process equipment and the pipings, thereby reducing plant shutdown time, preventing stress-corrosion cracking by polythionic acid, improving production efficiency, ensuring work safety and reducing production cost, is provided. For the object, the repairing method of the petroleum refining plant of the present invention has a first step of cleaning the process equipment and the pipings and softening agglomerated catalyst inside the process equipment, second step of rinsing the process equipment and the pipings and coating a surface of the softened catalyst by a coating agent, and third step of dumping the coated catalyst from the process equipment and re-rinsing the process equipment and the pipings. Accordingly, respective work can be efficiently conducted, the plant shutdown time can be reduced, the stress-corrosion cracking by the polythionic acid can be prevented, and work safety, reduction of maintenance cost and improvement of production efficiency can be ensured.

Method of cleaning and maintaining petroleum refining plants

In a hydrogen treating plant which includes a recycle gas line having a reactor for regenerating a hydrogen sulfide by hydrogenating sulfur and an H2S absorber for absorbing the hydrogen sulfide generated in the reactor, and includes the liquid cyclic line circulating liquid for absorbing the hydrogen sulfide in the H2S absorber therein, a refrigerant unit provided in the liquid cyclic line which is lower temperature and lower pressure relative to the recycle gas line.

Refrigerant unit in hydrogen treating plant

The present invention relates to a method of unloading a catalyst from a reactor wherein the reactor is filled with mixed liquid of condensed ring aromatic hydrocarbon having a required number of ring members, i.e. preferably 2 to 4 ring members, and gas oil, to wet the catalyst so as to form a coating of film on the catalyst before unloading the catalyst from the reactor.

Method of unloading catalyst

Growing community of inventors

Tokyo, Japan

Junichi Takano