Catalyst for preparing phosgene and method for preparing phosgene using the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9399582
APP PUB NO 20160137511A1
SERIAL NO

14904138

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention relates to a catalyst for preparing phosgene and a method for preparing phosgene using the catalyst. Said method comprises: modifying the surface of an activated carbon coating/foamed silicon carbide structural catalyst using an alkali metal salt; filling the catalysts having different thickness of the activated carbon coating and different amount of the alkali metal salt in different sections in the axial direction of the multi-tubular reactor of the fixed bed, and preparing phosgene using Cl2 and CO. The radial and axial temperature difference of the catalyst bed is lowered by using the alkali metal salt-modified activated carbon coating/foamed silicon carbide structural catalyst and by segmental filling, so that high temperature of tube wall is obtained in the case of a larger tube diameter, and high quality of steam is obtained stably.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
WANHUA CHEMICAL (NINGBO) CO LTD315812 WANHUA INDUSTRIAL PARK 39 HUANDAO NORTH ROAD DAXIE DEVELOPMENT ZONE NINGBO CITY ZHEJIANG PROVINCE NINGBO CITY ZHEJIANG PROVINCE 315812
WANHUA CHEMICAL GROUP CO LTD264006 NO 59 CHONGQING STREET YANTAI ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE SHANDONG PROVINCE YANTAI CITY SHANDONG PROVINCE 264006

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Bin Shandong, CN 408 2121
Hua, Weiqi Shandong, CN 39 31
Luo, Wuxi Shandong, CN 4 1
Shao, Liangfeng Shandong, CN 2 2
Wang, Lei Shandong, CN 2386 21419
Yao, Yu Shandong, CN 55 142
Zhang, Hongke Shandong, CN 24 90

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jan 26, 2028
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00