Tag Archives: carbonate

Method of producing low-salt sodium carbonate

Application Number: 00111055Application Date: 2000.05.22Publication Number: 1324764Publication Date: 2001.12.05Priority Information: International: C01D7/12Applicant(s) Name: Qingdao Alkali Industry Co., Ltd.Address: Inventor(s) Name: Wu Gang;Fang XuePatent Agency Code: 37108Patent Agent: xiang jiaqiAbstract A production method of low-salt soda is characterized by that before calcinatino, making filtered heaving alkali pass through extruding equipment to implement extrusino and dehydration under… Read More »

Pseudo-shield spark gap of titanium carbonate magnetoresistance head shield screen

Application Number: 00118756Application Date: 1996.05.16Publication Number: 1313586Publication Date: 2001.09.19Priority Information: 1995/6/7 US 08/480,069International: G11B5/23;G11B5/40Applicant(s) Name: IBM Corp.Address: Inventor(s) Name: T.S. Hufbanx;N.L. Robertson;S.H. WaPatent Agency Code: 11038Patent Agent: feng xunAbstract A magneto-resistive read head having a 'parasitic shield' provides an alternative path for currents associated with sparkovers, thus preventing such currents from damaging the read head.… Read More »

Process for directly synthesizing dimethyl carbonate from CO2 and methanol in supercritical condition

Application Number: 00111405Application Date: 2000.01.01Publication Number: 1264698Publication Date: 2000.08.30Priority Information: International: C07C68/04;C07C69/96Applicant(s) Name: China Petro-Chemical Group Co.Address: Inventor(s) Name: Fang Dingye;Cao Fahai;Liu DianhuaPatent Agency Code: 31203Patent Agent: luo dachenAbstract A process for directly synthesizing dimethyl carbonate features that under the existance of catalyst which is the mixture of magnesium or potassium carbonate and iodomethane, the… Read More »

Catalyst for preparing allyl (or vinyl) carbonate by cycloaddition

Application Number: 00120873Application Date: 2000.08.04Publication Number: 1305870Publication Date: 2001.08.01Priority Information: International: B01J27/25Applicant(s) Name: Shanxi Inst of Coal Chemistry, Chinese Academy of SciencesAddress: Inventor(s) Name: Sun Yuhan;Chen Xiaoping;Ma YugangPatent Agency Code: 14001Patent Agent: wei shuweiAbstract A catalyst for preparing propenyl (or vinyl) carbonate by cycloaddition contains KI (10-65 Wt.%), LiNO3 (1-35 %) and activated carbon or… Read More »

Process for preparing high-purity active zinc oxide by immersing in ammonia water and ammonium carbonate solution and complexing

Application Number: 00112249Application Date: 2000.04.30Publication Number: 1270144Publication Date: 2000.10.18Priority Information: International: C01G9/02Applicant(s) Name: Yang GuohuaAddress: Inventor(s) Name: Yang GuohuaPatent Agency Code: 32214Patent Agent: xia haichuAbstract A process for preparing high-purity active zinc oxide includes such steps as complex immersing of low-grade zinc oxide as raw material in mixture of ammonia water and ammonium dicarbonate, three-step… Read More »

Prepn. of di (trichloromethyl) carbonate

Application Number: 00121398Application Date: 2000.07.27Publication Number: 1336361Publication Date: 2002.02.20Priority Information: International: C07C68/06;C07C69/96Applicant(s) Name: Youbang Chemical Co., Ltd., Lishui, Zhejiang Prov.Address: Inventor(s) Name: Xia Jianfeng;Wang ZhiyuanPatent Agency Code: 33204Patent Agent: xu zhimingAbstract The present invention relates to preparation method of di(trichloromethyl) carbonate using methanol as raw material, at first, use the reaction of methanol and di(trichloromethyl)… Read More »

Process for treating sewage by decomposing carbonate with afterheat of slags

Application Number: 00112770Application Date: 2000.03.15Publication Number: 1313249Publication Date: 2001.09.19Priority Information: International: C02F1/66Applicant(s) Name: Gu JianAddress: Inventor(s) Name: Gu JianPatent Agency Code: 52100Patent Agent: yu dunhanAbstract A process for treating the sewage generated in yellow phosphorus includes grinding carbonate to obtain 10-100 meshes of powder, continuously spreading the powder onto just discharged slags for decomposing the… Read More »

Method for preparing subnanolevel ultrafine calcium carbonate by using caustic sludge

Application Number: 00123758Application Date: 2000.09.06Publication Number: 1341560Publication Date: 2002.03.27Priority Information: International: C01F11/18Applicant(s) Name: Qiao XihaiAddress: Inventor(s) Name: Qiao XihaiPatent Agency Code: 00000Patent Agent: Abstract The method for preparing subnanometer level superfine calcium carbonate by using alkaline residue discharged in the course of soda production with ammonia-soda process as raw material includes the following steps: stirring… Read More »

Catalyst for synthesizing methyl carbonate by methanol liquid phase oxidation oxonation

Application Number: 00113091Application Date: 2000.07.06Publication Number: 1333086Publication Date: 2002.01.30Priority Information: International: B01J31/22;C07C68/00Applicant(s) Name: Chengdu Inst. of Organic Chemistry, Chinese Academy of SciencesAddress: Inventor(s) Name: Wang Gongying;Wang Yue;Huang TaoPatent Agency Code: 00000Patent Agent: Abstract The present invention relates to a new-type catalyst for methyl alcohol liquid phase oxidation and oxonation to synthesize methyl carbonate. Said catalyst… Read More »

Direct carbon dioxide precipitation process of strontium carbonate or barium carbonate from neutral strontium or barium salt solution

Application Number: 00124604Application Date: 2000.09.26Publication Number: 1344679Publication Date: 2002.04.17Priority Information: International: B01D11/04;C01F11/18Applicant(s) Name: Inst. of Chemical Metallurgy, Chinese Academy of SciencesAddress: Inventor(s) Name: Zhu Tun;Xu XinPatent Agency Code: 00000Patent Agent: Abstract The present invention utilizes CO2 to deposit strontium carbonate or barium carbonate directly from neutral strontium and barium chloride, strontium and barium nitrate or… Read More »

Method for producing manganese carbonate from manganese sulfate in waste manganese mud

Application Number: 00113297Application Date: 2000.02.28Publication Number: 1311340Publication Date: 2001.09.05Priority Information: International: C01G45/00;C22B3/04;C22B3/44;C22B47/00Applicant(s) Name: Deng JianchengAddress: Inventor(s) Name: Deng Jiancheng;Deng JuanPatent Agency Code: 43108Patent Agent: cheng yibingAbstract This invention relates to prodn. of manganese carbonate from manganese sulfate in waste manganese ore mud. It this invention, manganese ore powder is steeped with sulfuric acid for prepn.… Read More »

Celestite or barite reducing process in solution to produce strontium carbonate or barium carbonate and sulfur element

Application Number: 00124605Application Date: 2000.09.26Publication Number: 1344680Publication Date: 2002.04.17Priority Information: International: C01B17/02;C01B17/027;C01F11/18Applicant(s) Name: Inst. of Chemical Metallurgy, Chinese Academy of SciencesAddress: Inventor(s) Name: Zhu TunPatent Agency Code: 00000Patent Agent: Abstract The present invention reduces celestite or barite with reductant in water solution to produce element sulfur while depositing strontium or barium to produce strontium carboante… Read More »

Process for preparing high-purity manganese carbonate

Application Number: 00113535Application Date: 2000.07.08Publication Number: 1283592Publication Date: 2001.02.14Priority Information: International: C01G45/00Applicant(s) Name: Baling Branch, China Petro-Chemical Co., Ltd.Address: Inventor(s) Name: Wang WenhuiPatent Agency Code: 43103Patent Agent: zhou shengmengAbstract A process for preparing high-purity manganese carbonate from pyrolusite and rhodochrosite includes extracting with sulfuric acid, adding fluoride to generate CaF2 or MgF2 deposit, filter, removing… Read More »

Sodium carbonate extracting process from caustic lime containing sodium sulfate

Application Number: 00113582Application Date: 2000.07.29Publication Number: 1336324Publication Date: 2002.02.20Priority Information: International: C01D7/00;C01D7/35Applicant(s) Name: Baling Co., China Petrochemical Corp., Ltd.Address: Inventor(s) Name: WAng Hongbo;Fu Songbao;Duan XuerongPatent Agency Code: 00000Patent Agent: Abstract The present invention relates to method of extracting sodium carbonate from alkalis ash containing sodium sulfate, it is characterized in that the alkali ash and… Read More »

Rareearth doped modified barium carbonate current rheological liquid and preparation process thereof

Application Number: 00113930Application Date: 2000.09.25Publication Number: 1345919Publication Date: 2002.04.24Priority Information: International: C10M113/08Applicant(s) Name: Xibei Polytechnical Univ.Address: Inventor(s) Name: Zhao Xiaopeng;Yin JianboPatent Agency Code: 00000Patent Agent: Abstract The present invention provides a current transformed liquid material and its preparation method, in particular, it relates to a kind of doped rare earth modified barium titanate anhydrous current… Read More »

One-step process for preparing reactive sintered ceramic material of silicon carbonate from pure carbon powder dispersed in water base

Application Number: 00114425Application Date: 2000.03.15Publication Number: 1264687Publication Date: 2000.08.30Priority Information: International: C04B35/573Applicant(s) Name: Wuhan Polytechnical Univ.Address: Inventor(s) Name: Wu Qide;Wei Mingkun;Wang HuaidePatent Agency Code: 42102Patent Agent: wang yuhuaAbstract A process for preparing high-performance reactive sintered ceramic of silicon carbide from pure carbon powder and waer as disperser includes adding additive to prepare high-dispersivity water-base slurry,… Read More »

Catalyst for synthesizing dimethyl carbonate and its preparing process

Application Number: 00117793Application Date: 2000.06.21Publication Number: 1304790Publication Date: 2001.07.25Priority Information: International: B01J23/02;C07C68/00;C07C69/96Applicant(s) Name: Shanxi Inst of Coal Chemistry, Chinese Academy of SciencesAddress: Inventor(s) Name: Han Yizhuo;Chang Yanhong;Yang CaihongPatent Agency Code: 14001Patent Agent: wei shuweiAbstract A catalyst for synthesizing dimethyl carbonate is prepared from the alkali-earth metal carbonate through raising temp to 600-1000 deg.C at speed… Read More »

Process for pressure separation of mathanol and dimethyl carbonate azeotrope

Application Number: 00107115Application Date: 2000.04.17Publication Number: 1271721Publication Date: 2000.11.01Priority Information: International: C07C68/08;C07C69/96Applicant(s) Name: Fin Chemical Plant, Non-Ferrous Jintai Chemical Co., Ltd., TonglingAddress: Inventor(s) Name: Mei Zhiduo;Yin Fangxi;Yu NengzhiPatent Agency Code: 34105Patent Agent: ma yuanshengAbstract A process for the pressure separation of methanol-dimethyl carbonate azeotrope features that the pressure generated by material itself in pressure rectification… Read More »

Calcium carbonate drying technology

Application Number: 00105815Application Date: 2000.04.07Publication Number: 1269326Publication Date: 2000.10.11Priority Information: International: C01F11/18Applicant(s) Name: Wang XinyiAddress: Inventor(s) Name: Wang XinyiPatent Agency Code: 13100Patent Agent: zhu dongliangAbstract An improved calcium carbonate wet material drying process is characterized by that it utilizes the flue gas discharged from the lime kiln, and makes it pass through plate-type heat-exchanger to… Read More »

Method for producing low salt low potassium heavy mass sodium carbonate by one step process

Application Number: 00103279Application Date: 2000.03.22Publication Number: 1314310Publication Date: 2001.09.26Priority Information: International: C01D7/12Applicant(s) Name: Yu ZhongfuAddress: Inventor(s) Name: Yu Zhongfu;Yu SihaoPatent Agency Code: 00000Patent Agent: Abstract In a decomposition reaction furnace, sodium bicarbonate is made to decompose into heavy sodium carbonate with low salt and potassium content by using superheated steam or saturated steam as heating… Read More »

Process for preparing calcium carbonate deposit by continuous method

Application Number: 00100355Application Date: 2000.01.18Publication Number: 1305956Publication Date: 2001.08.01Priority Information: International: B01J10/00;C01F11/18Applicant(s) Name: Beijing Chemical UnivAddress: Inventor(s) Name: Chen Jianfeng;Shen ZhigangPatent Agency Code: 11204Patent Agent: huo jinghuaAbstract A process for preparing spindle-shape precipitated calcium carbonate powder continuously features the carbonifying reaction between the mixed solution of soluble calcium salt and ammonia water, and raw gas… Read More »