熱硫酸法 的英文怎麼說
中文拼音 [rèliúsuānfǎ]
熱硫酸法
英文
hot sulfuric acid process-
Mas precursor powders are prepared using aluminium sulfate, colloidal silica, and magnesium nitrate as raw materials via sol - gel methods, dsc - tg and xrd show that the mas precursor powders transform to cordierite completely at 1300
以硫酸鋁、硝酸鎂和硅溶膠為原料,採用溶膠-凝膠法,制得mas先驅體粉末, xrd表明,該粉末經1300的熱處理后,完全轉變為堇青石。The extracting technology of fucoidan from sporophyll powder of sea mustard undaria pinnatifida suringar by enzymatic hydrolysis
熱水浸提法提取裙帶菜孢子葉粉巖藻聚糖硫酸酯的工藝研究The major performances of concrete and mortars, which are mixed with different quantities of expansion admixtures under the same mix proportions, are studied systematically and deeply in this work. sulphoaluminate mixed with a type of new expanding component by use of the composite methods are studied in the laboratory, and some achievements have been obtained. the service conditions, the characteristics and the shortcomings of expansion admixture in the concrete engineering are analyzed and summarized based on literatures, and the expanding mechanism of concrete is discussed
本文試圖從膨脹劑不同摻量研究其對混凝土和砂漿主要性能的影響,進行了一系列宏觀力學性能試驗研究;利用差熱分析( dta ) 、掃描電子顯微鏡( sem )等分析手段對鈣礬石等水化產物的結晶和生成量、形貌特徵進行微觀分析;並採用復合方法摻加新型膨脹組分對硫鋁酸鹽類膨脹劑( uea )進行了改性試驗研究,根據多因素模糊綜合評價方法就各類膨脹劑的主要性能進行綜合評價,得出摻加新型膨脹組分pt的膨脹劑性能較優,取得了明顯的效果。- acetolactate decarboxylase is purifed from cell extract by 50 % - 80 % ammonium sulfate - fractionation, 50, 2min heat treatment and deae - sepharose fast flow column chromatography, which we study the different ph and different buffer of deae - sepharose fast flow column chromatography and conclude ph 6
對其酶學性質進行了研究。 -乙酰乳酸脫羧酶經50 80硫酸銨分級沉澱、 50 , 2min熱處理、 deae - sepharosefastflow離子交換柱層析方法分離純化。The temperature of the mixture can be kept at above 200, thus the oxidation power of nitric acid can be kept at a rather high level and the non - diamond carbon can be removed completely
其做法是,將半成品與濃硫酸混合,加熱到200以上,將濃硝酸緩慢滴入,進行氧化處理,這樣可以使混合物保保持較高溫度,從而提高了硝酸的氧化能力。The pretreatment, effect of bath compositions and operation conditions such as temperature, currenty and time on compactness of the zinc and cu / ni / cr coatings have been investigated. the relationship of operation conditions to thickness of the coatings was studied by weight method. the specimens have been pickled in nacl or sulfate acid solution to evaluate the porosity of the coating
研究了鎂合金電鍍前處理工藝,電鍍鋅、電鍍銅/鎳/鉻工藝配方及其施鍍溫度、電流密度和時間對鍍層緻密性的影響;採用稱重法研究施鍍工藝與鍍層厚度的關系,利用nacl溶液和硫酸溶液浸泡試樣來考察鍍層孔隙率,採用劃痕試驗和熱震試驗檢驗鍍層的結合力,採用金相顯微鏡和掃描電子顯微鏡觀察鍍層表面形貌。3. bring forward a new idea : the ideology of synergetics used in atomic simulation and multi - scale simulation of materials design. on the basis of this, next tasks were put forward : ( 1 ) analyzing the changes of stress - strain curves of the interphase before and after pre - treatment ; ( 2 ) the efficient of the coupling effect of o2, na2s04 and h2o stream on the oxidation and erosion resistance of interphase ; ( 3 ) the methods of improving environment performance of interphase above 1273k
提出將協同學的思想用於原子級模擬及跨尺度模擬的思路,並在此基礎上,提出下一步的工作設想: ( 1 )分析熱處理前後界面相區域應力-應變曲線的變化; ( 2 )航空發動機模擬環境中,氧、硫酸鈉蒸汽及水蒸汽耦合效應對界面相抗氧化性、抗腐蝕性的影響; ( 3 ) 1273k以上界面相環境性能提高的方法。Complex acid barium spectrophotometry in determining sulfate in water
鉻酸鋇分光光度法冷法和熱法測定水中硫酸鹽的異同Standard test method for determination of the moisture and volatile content of sulfonated and sulfated oils by hot - plate method
用熱板法測量碘化油和硫酸鹽油中含水量和揮發量的標準試驗方法Catalysts were prepared by impregnation reduction, thermal reduction, advanced thermal reduction and sol - gel methods from these metals. electrochemistry measurements, xrd, tem were used to test these catalysts. the results showed that these metals have some electrocatalysis activities towards hydrogen oxidation reaction
本文選擇了w 、 mo 、 co等金屬,採用浸漬還原法、熱還原法、改進的熱還原法以及溶膠凝膠法分別制備了這幾種金屬的碳載催化劑,對制備出的非貴金屬催化劑進行了電化學測試、 x -射線衍射( x - raydiffraction , xrd ) 、透射電子顯微鏡( transmissionelectronmicroscopy , tem )等測試,研究結果表明:這些非貴金屬在硫酸體系中對氫氣的氧化反應均有一定的催化活性。The optimum conditions of preparation were as fellows : the concentration of zinc sulfate solution of 1. 8 - 2. omol / l, the concentration of ammonium bicarbonate solution of 1. 4 ~ 1. 6mol / l, the time of ultrasonic radiation of 25 ~ 30min. iv. preparation of active zinc oxide by means of microwave radiation to calcine precursor of basic zinc carbonate firstly, and a mechanism on preparation of ultra - fine active zinc oxide by means of microwave radiation has been investigated emphatically as well as the effects on quality of ultra - fine active zinc oxide have been analyzed and discussed in detail, the time of microwave radiation was 7 ~ 16 min ; comparing microwave radiation calcining with conventional calcining, the calcining time of microwave radiation was one thirty to one twenty, the calcining time shortened hugely, energy consumption saved hugely, the quality of product improved
首次引入超聲波輻射制備超細活性氧化鋅前驅體堿式碳酸鋅新技術,研究了超聲波輻射制備前驅體堿式碳酸鋅的機理,並分析和討論了影響前驅體質量的各種因素,確定了最佳的前驅體制備條件為:硫酸鋅濃度為1 . 8 2 . 0mol / l ,碳酸氫銨的濃度為1 . 4 1 . 6mol / l ,超聲波輻射25 30min ; 4 、首次採用微波加熱煅燒前驅體堿式碳酸鋅制備超細活性氧化鋅的新技術,研究了微波輻射加熱煅燒前驅體制備超細活性氧化鋅的機理,並分析和討論了影響活性氧化鋅質量的各種因素,確定了最佳的超細活性氧化鋅制備條件為:微波加熱煅燒時間為7 16min ,與傳統煅燒方法相比,煅燒時間僅為傳統的1 30 1 20 ,大大縮短煅燒時間,節省能耗,提高了煅燒產品的質量; 5 、完成了從鋅浮渣中制備超細活性氧化鋅的小試試驗和擴大試驗。Using aluminium sulfate and colloidal silica as raw materials, another kind of mullite precursor powders is made. the relative density of silica - rich mullite ceramic sintered from these powders at 1550 for 1 hour with a pressure of 15mpa is 97 %
以硫酸鋁、硅溶膠為原料,採用溶膠-凝膠法制備了莫來石先驅體粉末,所得富硅莫來石先驅體粉末在1550 、 15mpa下熱壓燒結1小時后,緻密度達97 。Abstract : methods and main equipment of waste heat recovery in sulphur - buring sulphuric acid plants are described
文摘:系統闡述了硫磺制酸生產過程中的廢熱回收方法、主要設備和提高熱回收率的措施。Nano - cuo powders were successfully prepared by pressure - hydrothermal method with cuso4 5h2o and naoh as materials. xrd, sem and tem were used to characterize the samples. the influence of raw materials " initial concentration, thermal treatment " temperature, pressure and thermal treatment " time on the morphology and size of cuo were analyzed, and the possible growth mechanism was also discussed
以硫酸銅和氫氧化鈉為原料,用壓力-熱液法合成了納米氧化銅粉體,用xrd 、 sem 、 tem對所制得的氧化銅進行了觀察與表徵,分析了原料起始濃度、熱處理溫度、壓力、 ph值及熱處理時間對氧化銅形態和大小的影響,初步探討了不同形態氧化銅的生長機理。分享友人