CN107469850A - 一种顺酐催化剂的碳化硅载体生产工艺 - Google Patents
一种顺酐催化剂的碳化硅载体生产工艺 Download PDFInfo
- Publication number
- CN107469850A CN107469850A CN201710731399.4A CN201710731399A CN107469850A CN 107469850 A CN107469850 A CN 107469850A CN 201710731399 A CN201710731399 A CN 201710731399A CN 107469850 A CN107469850 A CN 107469850A
- Authority
- CN
- China
- Prior art keywords
- sintering
- carboround
- rolling
- production technology
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 28
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 238000000498 ball milling Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000007790 solid phase Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- -1 mineralizer Substances 0.000 claims description 2
- 239000012744 reinforcing agent Substances 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229960003511 macrogol Drugs 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- BPJYAXCTOHRFDQ-UHFFFAOYSA-L tetracopper;2,4,6-trioxido-1,3,5,2,4,6-trioxatriarsinane;diacetate Chemical compound [Cu+2].[Cu+2].[Cu+2].[Cu+2].CC([O-])=O.CC([O-])=O.[O-][As]1O[As]([O-])O[As]([O-])O1.[O-][As]1O[As]([O-])O[As]([O-])O1 BPJYAXCTOHRFDQ-UHFFFAOYSA-L 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
- B01J27/224—Silicon carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0027—Powdering
- B01J37/0036—Grinding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0217—Pretreatment of the substrate before coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
Abstract
本发明公开了一种顺酐催化剂的碳化硅载体生产工艺,所述生产工艺为固相高温烧结工艺,其特征在于:所述固相高温烧结工艺步骤为:碳化硅原料粉末→原料与助剂混合并球磨→自动液压机成型→真空热压烧结炉烧结→滚制→成品,所述烧结工序完成后加入滚制工序,所述滚制工序为安装在所述烧结炉上的滚动设备带动所述烧结炉内碳化硅载体相互接触碰撞,所述碳化硅载体通过滚制工序可提高比表面积和稳定性。本发明能够使碳化硅载体倒角处催化剂量较少的现象减少,碳化硅上的催化剂均匀度提升,开裂比率可降低至50%,催化剂活性增强,产品竞争力提高。
Description
技术领域
本发明涉及催化剂技术领域,具体为一种顺酐催化剂的碳化硅载体生产工艺。
背景技术
顺酐(顺丁烯二酸酐)是仅次于苯酐和醋酐的世界第三大有机酸酐。顺酐由于结构上存在许多特点,有很强的反应性能,是合成不饱和聚酯树脂、醇酸树脂等的重要原料;又是制备1,4-丁二醇、四氢呋喃、调富马酸等一系列重要有机化学和精细化学品的原料,是重要的有机化工产品之一,广泛用于农药、医药、涂料、食品、增塑剂、助剂、造纸和润滑油添加剂等工业。顺酐作为催化剂一般配合载体使用,载体除了赋予催化剂以一定的形体和强度之外,还可以降低比较昂贵的催化剂活性组分的含量。载体的几何形状、粒度大小、比表面积、孔隙率、孔容、孔径分布、导热性能和耐热性能等物理性质以及载体的化学组成等都对催化剂有一定的影响。
目前用于催化剂载体主要是氧化铝、氧化硅等氧化物,此类载体虽具有制备简单、原料易于获得、高比表面积等优点,但在一些苛刻的反应条件下,比如高温高压、原料中混有杂质时,将导致催化剂活性的降低和寿命的减短,机械强度不是很高,在催化剂的再生过程中,由于氧化铝载体导热性能不优良,很容易因为飞温造成催化剂活性组分烧结。碳化硅与氧化铝相比,明显具有以下方面的优点,已经成为化学反应中催化剂载体的理想候选材料:(1)高的导热性,碳化硅的导热率高达100~200Wm-1K-1,而氧化铝只有20Wm-1K-1;(2)化学稳定性好,耐腐蚀,且不易与活性组分产生相互作用,有实验指出高比表面碳化硅即使在HF或5M的HNO3中依然保持稳定;(3)机械强度高,不易破碎;(4)热膨胀率低,在100~500℃,碳化硅为3.7×10-6℃-1,而氧化铝为7.3×10-6℃-1。但目前市售的碳化硅载体由于比表面积太小(<1m2g-1),不能满足化学反应中的传要求,很大程度上限制了它的应用。
目前生产高比表面积碳化硅主要采用无压烧结工艺,以碳化硅为主要原料,助剂粘合剂混合高温烧结制成,无压烧结工艺又分为固相烧结和液相烧结。市面上生产的碳化硅载体外观大都为圆环型,但由于圆环型碳化硅载体的两端表面和弧面为L形直角,且陶瓷本身的脆性特点,喷涂催化剂后的碳化硅载体在使用中容易破损和开裂,大大影响催化剂的活性。
发明内容
为了解决上述问题,本发明在固相烧结工艺中增加了滚制工艺,使圆环型碳化硅载体比表面积增大,在生产和使用过程中不容易开裂,大大提升了碳化硅的稳定性,进而提高了顺酐催化剂的活性。
本发明的技术方案是,设计了一种顺酐催化剂的碳化硅载体生产工艺,采用固相烧结工艺,其工艺步骤为:
原料粉末→混合球磨(助剂)→成型→烧结→滚制→成品
其中,原料粉末绿色碳化硅粉末,助剂为少量的特殊优质高岭土、粘合剂、增强剂、高温结合剂、矿化剂、造孔剂、润滑剂。
采用球磨机对碳化硅粉末和助剂进行混合并球磨10~12h,其中碳化硅含量占90%以上。
采用自动液压机对混合后的粉末进行压制成型,模具为外径为12mm、内径为8mm、高为7mm的管形,其中管形模具中心设有直径为4mm、高5mm的圆柱。
采用真空热压烧结炉进行烧结,整个烧结过程分为三个阶段:第一阶段,从室温缓慢升温至600~700℃,保温30~45min;第二阶段,快速升温至1600~1750℃,在1350~1400℃时通入氩气,气氛压力保持在0.05~0.08MPa;第三阶段,快速升温至1900~2200℃,保温45~60min后,关炉自然冷却。
烧结炉上设有使烧结炉滚动的滚动系统和温度传感器,滚动系统为安装在烧结炉上的滚动设备,设备倾斜放置,开动滚动设备使烧结炉翻转,控制转速为10~20r/min,烧结炉内的碳化硅载体相互接触碰撞。随着温度传感器中显示的温度降到100℃时,关闭滚动系统,待温度传感器显示温度降到室温后取出烧结炉内的氮化硅载体,即为成品。
另外,滚制工艺中的转速过慢会使圆环型碳化硅载体的倒角速度变慢,降低了滚制工艺的效率;转速过快时,角速度的加成使碳化硅之间的作用力更大,容易使碳化硅载体碎裂。
本发明的有益效果为:经过高温烧结和滚制后的碳化硅载体喷涂顺酐催化剂后,圆环型碳化硅载体的两端表面和弧面之间曲率降低,倒角处催化剂量少的现象减少,碳化硅上的催化剂均匀度提升,开裂比率可降低至50%,催化剂活性增强,产品竞争力提高。
附图说明
图1是本发明实施例的顺酐催化剂的碳化硅载体生产工艺步骤图。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明。
本发明设计了一种顺酐催化剂的碳化硅载体生产工艺,按质量百分比取90%的1~2μm碳化硅粉末和10%的高岭土、碳化硼、聚乙二醇6000、酚醛树脂、四甲基氢氧化铵,放入AYM滚动式球磨机混合并球磨,球磨时间为11h,球磨后的粉末放入模具中心设有圆柱的管形模具,其中模具尺寸为外径12mm、内径8mm、高7mm,圆柱尺寸为直径4mm、高5mm,然后,把装有碳化硅粉末的模具放入400千牛单柱自动液压机进行压制成型,将成型后的碳化硅取出并放入ZT(T)-40-20真空热压烧结炉进行烧结,整个烧结过程分为三个阶段:第一阶段,从室温缓慢升温至650℃,650℃保温40min;第二阶段,快速升温至1700℃,1400℃左右通入氩气,气氛压力保持在0.06MPa左右;第三阶段,快速升温至2000℃,保温45min后,关炉自然冷却。
最后,打开烧结炉上的滚动系统,转速调为15r/min,当温度传感器中显示的温度降到100℃时,关闭滚动系统,当温度传感器显示温度降到室温后取出烧结炉内的氮化硅载体,即为成品。
该碳化硅载体为规整的圆环型的,圆环型碳化硅载体的两端表面和弧面由原来的L型直角变为64°的R角,碳化硅表面更光滑。
采用该工艺生产的碳化硅载体的物理性能见表1。
表1碳化硅载体的物理性能
开头 | 规整圆环型 | 孔隙率% | >50 |
外观颜色 | 浅绿色 | 碱金属% | ≤0.3 |
材料强度(莫氏) | ≥9.4级 | 堆积密度 | 0.88g/cm3 |
产品抗压强度 | 轴向≥8kg/颗 | 径向≥3kg/颗 |
以上所述仅是本发明的优选实施方式,本发明生产的碳化硅载体不仅应用于顺酐,还可应用于其它催化剂当中。凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (2)
1.一种顺酐催化剂的碳化硅载体生产工艺,所述生产工艺为固相高温烧结工艺,其特征在于:所述固相高温烧结工艺步骤为:碳化硅原料粉末→原料与助剂混合并球磨→自动液压机成型→真空热压烧结炉烧结→滚制→成品,所述烧结工序完成后加入滚制工序,所述滚制工序为安装在所述烧结炉上的滚动设备带动所述烧结炉内碳化硅载体相互接触碰撞,所述碳化硅载体通过滚制工序可提高比表面积和稳定性。
2.根据权利要求1所述的一种顺酐催化剂的碳化硅载体生产工艺,其特征在于:所述助剂为高岭土、粘全剂、增强剂、高温结合剂、矿化剂、造孔剂、润滑剂中的几种。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710731399.4A CN107469850A (zh) | 2017-08-23 | 2017-08-23 | 一种顺酐催化剂的碳化硅载体生产工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710731399.4A CN107469850A (zh) | 2017-08-23 | 2017-08-23 | 一种顺酐催化剂的碳化硅载体生产工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN107469850A true CN107469850A (zh) | 2017-12-15 |
Family
ID=60602281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710731399.4A Pending CN107469850A (zh) | 2017-08-23 | 2017-08-23 | 一种顺酐催化剂的碳化硅载体生产工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107469850A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112684832A (zh) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | 克服碳化硅环状载体温度反应滞后的方法及设备 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2225297Y (zh) * | 1995-06-15 | 1996-04-24 | 化学工业部西南化工研究院 | 催化剂 |
CN106045521A (zh) * | 2016-05-27 | 2016-10-26 | 台州东新密封有限公司 | 采用热压烧结制备干气密封旋转环的方法 |
CN106811645A (zh) * | 2017-01-12 | 2017-06-09 | 中国科学院兰州化学物理研究所 | 一种碳化硅基高温自润滑复合材料及其制备方法 |
-
2017
- 2017-08-23 CN CN201710731399.4A patent/CN107469850A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2225297Y (zh) * | 1995-06-15 | 1996-04-24 | 化学工业部西南化工研究院 | 催化剂 |
CN106045521A (zh) * | 2016-05-27 | 2016-10-26 | 台州东新密封有限公司 | 采用热压烧结制备干气密封旋转环的方法 |
CN106811645A (zh) * | 2017-01-12 | 2017-06-09 | 中国科学院兰州化学物理研究所 | 一种碳化硅基高温自润滑复合材料及其制备方法 |
Non-Patent Citations (1)
Title |
---|
侯海博主编: "《你必须知道的自然人体科学秘密》", 31 January 2013, 新时代出版社 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112684832A (zh) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | 克服碳化硅环状载体温度反应滞后的方法及设备 |
CN112684832B (zh) * | 2019-10-17 | 2022-01-28 | 中国石油化工股份有限公司 | 克服碳化硅环状载体温度反应滞后的方法及设备 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107399988B (zh) | 一种利用铝硅系工业废渣制备氧化铝-碳化硅复合多孔陶瓷的方法 | |
CN113831136B (zh) | 一种固相烧结碳化硅制品及其制备方法 | |
JP2024500914A (ja) | 高熱伝導性窒化ケイ素セラミックス絶縁板及びその製造方法 | |
CN101648808B (zh) | 一种石墨材料的制备方法 | |
CN101962297A (zh) | 一种多晶硅还原炉用氮化硅陶瓷环的制备方法 | |
CN1332910C (zh) | 采用粉末冶金工艺制备高导热氮化铝陶瓷基片的方法 | |
CN109534820B (zh) | 一种玻璃热弯成型用陶瓷模具及其制备方法 | |
CN100551869C (zh) | 用于微波加热的陶瓷基透波承载体及生产方法 | |
CN106800420A (zh) | 一种碳化硅晶须原位复合刚玉高温陶瓷材料及其制备方法 | |
CN104876597A (zh) | 一种纳米级基质结合高性能电熔镁钙砖及其制造方法 | |
CN1207247C (zh) | 一种制备氮化铝陶瓷基片的方法 | |
CN113185302A (zh) | 一种风力发电用大尺寸氮化硅陶瓷球及其制备方法和应用 | |
CN105400982A (zh) | 通过氢化钛来制备石墨烯增强钛基纳米复合材料的方法 | |
CN103553647B (zh) | 用硅切割废砂浆制备氮化硅结合碳化硅耐火材料的方法 | |
CN111072379A (zh) | 一种适用于管状旋转陶瓷靶材的承烧板及烧结方法 | |
CN107469850A (zh) | 一种顺酐催化剂的碳化硅载体生产工艺 | |
CN104909769A (zh) | 一种镁基复合耐火原料及其制备方法 | |
CN105734389A (zh) | 一种高韧性金属陶瓷模具材料及其制备方法 | |
CN100509692C (zh) | 一种钨刚玉陶瓷材料及低温烧结方法 | |
CN107935556B (zh) | 一种纳米陶瓷结合剂的制备方法 | |
CN111196716A (zh) | 一种改性石墨烯制备的无釉耐热日用白瓷及其制作工艺 | |
CN114085082B (zh) | 一种碳化硅/黑滑石复合陶瓷膜支撑体及其制备方法 | |
CN112898022B (zh) | 一种超低温烧结微波介质材料Ca2V2O7-H3BO3及其制备方法 | |
CN107721450A (zh) | 一种多孔陶瓷材料的制备方法 | |
CN104016329B (zh) | 高密度高强度石墨的制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |