Tag Archives: urea

Process for preparing composite N-P-K fertilizer directly from urea solution

Application Number: 00116235Application Date: 2000.05.30Publication Number: 1280969Publication Date: 2001.01.24Priority Information: International: C05G1/00;C05G3/00;C05G5/00Applicant(s) Name: Shanghai Chemical Research InstAddress: Inventor(s) Name: Zhu DongmingPatent Agency Code: 31104Patent Agent: gao shiqunAbstract A process for preparing granular composition N-P-K fertilizer directly from urea solution includes such steps as spraying the 65-99.7% urea solution at 80-140 deg.c onto base N-P-K fertilizer,… Read More »

Strong urea and its preparing process

Application Number: 00119122Application Date: 2000.06.17Publication Number: 1330056Publication Date: 2002.01.09Priority Information: International: C05C9/00;C05C13/00Applicant(s) Name: Darong Chemical Metallurgy Co Ltd, NingxiaAddress: Inventor(s) Name: Zhu Zhenlin;Wang Zhengming;Li RonghuaPatent Agency Code: 64100Patent Agent: guo liningAbstract A strong urea fertilizer is prepared through proportionally adding calcium cyamamide to concentrated urine or fused urea and fully stirring. Its advantages include durable… Read More »

Chinese medicinal stone coated urea

Application Number: 00120887Application Date: 2000.08.04Publication Number: 1290677Publication Date: 2001.04.11Priority Information: International: C05C9/00;C05G3/00;C05G3/08Applicant(s) Name: Li ShuchunAddress: Inventor(s) Name: Li Qiang;Li ShuchunPatent Agency Code: 00000Patent Agent: Abstract Chinese medicinal stone coated urea consists of urea, Chinese medicinal stone, bone glue, and starch. Coating with Chinese medicinal stone can reduce urea less through flowing and evaporation, prolong relieving… Read More »

Method for prepn N-alkyl-N'-methyl alkyl urea selenite

Application Number: 00122570Application Date: 2000.06.28Publication Number: 1283616Publication Date: 2001.02.14Priority Information: 1999/6/28 DE 19929602.2International: C07D239/10Applicant(s) Name: BASF AktiengesellschaftAddress: Inventor(s) Name: A. Kramo;M. John-Peter;R. HeintzPatent Agency Code: 72001Patent Agent: yang liqinAbstract The invention relates to a process for preparing essentially formic acid-free N-alkyl-N'-methylalkyleneureas of the formula, from the corresponding alkyleneureas by reaction with monomeric or polymerized formaldehyde… Read More »

Improved urea synthetic method and its equipment

Application Number: 00122613Application Date: 2000.08.02Publication Number: 1290693Publication Date: 2001.04.11Priority Information: 1997/8/29 JP 234364/97; 1996/10/7 JP 265969/96; 1996/10/22 JP 279472/96International: C07C273/04Applicant(s) Name: Toyo Gosei Kogyo Co., ltd.Address: Inventor(s) Name: Koshima Yasunobu;Fujii HidetsuguPatent Agency Code: 72001Patent Agent: wang jihaoAbstract A vertical condenser is installed on or above a urea synthesis column to condense the mixed gas from… Read More »

Process for preparing dimethyl silanyl urea

Application Number: 00122719Application Date: 2000.06.08Publication Number: 1288894Publication Date: 2001.03.28Priority Information: 1999/6/8 FR 99/07206International: C07F7/10Applicant(s) Name: Atophinar Inc.Address: Inventor(s) Name: D. Rifss;C. Ruping;G. DerifengPatent Agency Code: 72001Patent Agent: wang jihaoAbstract The invention relates to a process for manufacturing bis-silyl ureas which consists in reacting urea and a disilazane in an aliphatic nitrile and most particularly in… Read More »

Method for preventing urea from caking

Application Number: 00122834Application Date: 2000.08.29Publication Number: 1339418Publication Date: 2002.03.13Priority Information: International: C05C9/02;C05G3/00Applicant(s) Name: Fudao Chemical Engineering Co., Ltd, Hainan Prov.Address: Inventor(s) Name: Liu Guoru;Li Weichun;Liu ChuanzhengPatent Agency Code: 11014Patent Agent: cai zhiyongAbstract The method of preventing urea from caking is that before urea pelletizing, formaldehyde and urea in the molar ratio of 4-6 are made… Read More »

Process for recovering condensed liquid in urea preparing process

Application Number: 00126718Application Date: 2000.12.01Publication Number: 1356314Publication Date: 2002.07.03Priority Information: International: C07C273/14Applicant(s) Name: Baling Branch, Chinese Petro-Chemical Co LtdAddress: Inventor(s) Name: Hu YuehuaPatent Agency Code: 00000Patent Agent: Abstract A process for recovering the condensed liquid in urea technology features that the said condensed liquid technically flows through water tank, pump, cationic exchanger, mixed ionix exchanger… Read More »

Multi-element synergistic urea and its preparing process

Application Number: 00112324Application Date: 2000.06.09Publication Number: 1327969Publication Date: 2001.12.26Priority Information: International: C05G3/08;C05G5/00Applicant(s) Name: Wu ChengxiangAddress: Inventor(s) Name: Wu ChengxiangPatent Agency Code: 34101Patent Agent: yu chengdunAbstract A multi-element synergistic urea is prepared from ordinary urea as main components, urease inhibitor, ammonia stabilizer, nitration inhibitor, rare-earth elements and trace elements including Cu, Fe, Zn, Mn, P and… Read More »

Sulfony urea compound and its application as biiocidal herbicide

Application Number: 00112466Application Date: 2000.08.15Publication Number: 1337158Publication Date: 2002.02.27Priority Information: International: A01N47/36Applicant(s) Name: Lianyungang City No.2 Pesticide PlantAddress: Inventor(s) Name: Zhao Fengge;Cao Guanghong;Xie LongguanPatent Agency Code: 32206Patent Agent: shen bingAbstract The present invention relates to a sulfonylurea compound. Said invention provides the general formula of said compound. Said sulfonylurea compound can be used as effective… Read More »

Sulfonyl urea compound containing alkylthio or propenyl oxy radical and with herbicidal activity and its prepn.

Application Number: 00113423Application Date: 2000.05.11Publication Number: 1323789Publication Date: 2001.11.28Priority Information: International: A01N47/36;C07D251/42Applicant(s) Name: Hunan Chemical Engineering Inst.Address: Inventor(s) Name: Huang Mingzhi;Huang Lu;Chen CanPatent Agency Code: 43113Patent Agent: yang huiAbstract The present invention discloses a series of sulfonylurea compounds containing alkylsulfo radical ro propionyloxy or propine oxy radical and its preparation method, the invented compounds contain… Read More »

Compound long-acting urea and its producing process and special equipment

Application Number: 00110237Application Date: 2000.03.22Publication Number: 1314329Publication Date: 2001.09.26Priority Information: International: C05G3/08Applicant(s) Name: Shenyang Inst. of Applied Ecology, Chinese Academy of SciencesAddress: Inventor(s) Name: Zhang Zhiming;Li Xin;Zhang DeshengPatent Agency Code: 21002Patent Agent: min xianzhiAbstract The compound urea is the mixture of urea and additive, which acounts for 0.3-0.8 % of urea, consists of ammonia stabilizer… Read More »

Acylated amino-benzenesulfonyl urea, its prep. and use as herbicide and plant-growth regulator

Application Number: 00108955Application Date: 1995.04.12Publication Number: 1295067Publication Date: 2001.05.16Priority Information: 1994/4/29 DE P4415049.0International: C07D239/42;A01N47/36Applicant(s) Name: Hoechst Schering Agrevo GmbHAddress: Inventor(s) Name: G. Schnabel;L. Willms;K. BauerPatent Agency Code: 11038Patent Agent: huang zexiongAbstract Acylated amino-benzenesulfonyl urea, its preparation method and use as herbicide and plant-growth regulator. The invention concerns compounds of formula (I) and their salts, W<1>,… Read More »

Process for preparing 4-nitroso-aniline from urea and nitrobenzene

Application Number: 00106954Application Date: 2000.04.26Publication Number: 1296002Publication Date: 2001.05.23Priority Information: 1999/11/16 KR 50965/1999International: C07C211/52;C07C209/00Applicant(s) Name: Gumbo Petrochemical Co., Ltd.Address: Inventor(s) Name: Joo Yong-Chui;Kim Chin-Uk;Won Chung-ImPatent Agency Code: 11038Patent Agent: sun aiAbstract A method for preparing 4-nitrosoaniline has been disclosed, which including reacting urea and nitrobenzene in a polar organic solvent in the presence of a… Read More »

Control releasing urea base product

Application Number: 00106435Application Date: 2000.04.06Publication Number: 1271532Publication Date: 2000.11.01Priority Information: 1999/4/6 US 09/286,931; 2000/3/16 US 527374/09International: A23K1/22;C05G3/00;C05C9/00Applicant(s) Name: Planet Polymer Technologies, Inc.Address: Inventor(s) Name: Mao Lijun;Yang Xiaoming;R. J. PeikavyPatent Agency Code: 31100Patent Agent: zhou chengzeAbstract Controlled release urea-based feed supplements for ruminant animals and controlled release urea-based plant nutrients are comprised of particles or granules… Read More »

Method for simultaneously modernization of ammonia producing equipment and urea producing equipment

Application Number: 00105319Application Date: 2000.03.31Publication Number: 1270957Publication Date: 2000.10.25Priority Information: 1999/3/31 EP 99201009.0International: C07C273/04;C01C1/02Applicant(s) Name: Wuria Casaler Co., Ltd.Address: Inventor(s) Name: G. Pageny;F. ZaldyPatent Agency Code: 11038Patent Agent: huang zexiongAbstract A method for the simultaneous modernisation of a plant for ammonia synthesis and a plant for urea synthesis, provides – inter alia – the arrangement… Read More »

Urea modifier

Application Number: 00104460Application Date: 2000.07.07Publication Number: 1298854Publication Date: 2001.06.13Priority Information: International: C05G3/08Applicant(s) Name: Lanzhou Petro-Chemical Branch, China Petroleum-Natural Gas Co LtdAddress: Inventor(s) Name: Liu Guangli;Cao Lanhua;Liu FaqiangPatent Agency Code: 62004Patent Agent: ma yanpingAbstract The invented urea modifier is composed of 1.0-2.5 wt.% of denitrifying bacteria activity inhibitor, 1.5-3.0 wt.% of urease activity inhibitor, 1.0-2.5 wt.%… Read More »

Method for preparing urea derivatives by catalytic oxidation and carbonylation of amine

Application Number: 00104412Application Date: 2000.06.21Publication Number: 1277959Publication Date: 2000.12.27Priority Information: International: C07C273/02;C07C275/00Applicant(s) Name: Lanzhou Inst. of Chemical Physics, Chinese Academy of SciencesAddress: Inventor(s) Name: Deng Youquan;Shi Feng;Miao ShaojunPatent Agency Code: 62002Patent Agent: fang xiaojiaAbstract The present invention relates to a method of preparing carbamide derivative by amine compound catalytic oxidation and oxonation reactions. Ziroconium dioxide… Read More »

Preph. of 4,4'-dinitro diphenylamine from urea and nitrobenzene

Application Number: 00104169Application Date: 2000.03.21Publication Number: 1298866Publication Date: 2001.06.13Priority Information: 1999/12/3 KR 54650/1999International: C07C209/00;C07C211/52Applicant(s) Name: Kvm-Ho Petro-Chemical Co., Ltd.Address: Inventor(s) Name: Zoo Yung-Tae;Kim Jin-Ok;Won Chung-ChoePatent Agency Code: 11038Patent Agent: gui yongliangAbstract Disclosed herein is a method for preparing 4,4'-dinitrodiphenylamine, comprising reacting urea and nitrobenzene in a polar organic solvent in the presence of a base… Read More »

Modernization method for urea production equipment

Application Number: 00104052Application Date: 2000.03.16Publication Number: 1267668Publication Date: 2000.09.27Priority Information: 1999/3/16 EP 99200794.8International: C07C273/04Applicant(s) Name: Ouria. Cassalle AGAddress: Inventor(s) Name: Ghirguio. Paghgn;Phdriko. ZadiPatent Agency Code: 11038Patent Agent: he tengyunAbstract A method for the modernization of a plant for urea production of the type comprising a reactor for urea synthesis, a stripping unit with carbon dioxide… Read More »

Process for preparing urine-base compound fertilizer by fusing urea (urine) and spray granulating

Application Number: 00102903Application Date: 2000.03.09Publication Number: 1264691Publication Date: 2000.08.30Priority Information: International: C05G1/00;C05G5/00Applicant(s) Name: Wang ChangshanAddress: Inventor(s) Name: Wang ChangshanPatent Agency Code: 00000Patent Agent: Abstract A process for preparing urea-base composite fertilizer UAPK or UNPK includes preparing molten urea liquid from granular urea, potassium salt and water or industrial urea, adding potassium salt, pressurizing onto liquid… Read More »

Improved process of producing urea with carbon dioxide stripping step

Application Number: 00101076Application Date: 2000.01.18Publication Number: 1284498Publication Date: 2001.02.21Priority Information: 1993/1/7 CH 00 048/93-1International: C07C273/04Applicant(s) Name: Uria Casale S.AAddress: Inventor(s) Name: G. PaganiePatent Agency Code: 11038Patent Agent: chen wenbengAbstract The invention provides an improved process for urea production as well as a method of retrofitting a pre-existing urea plant based on the Stamicarbon process.