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calcium sulfate dihydrate

中文名称
——
中文别名
——
英文名称
calcium sulfate dihydrate
英文别名
gypsum;calcium sulphate dihydrate;Ca S O4 (H2 O).8;calcium;sulfate;hydrate
calcium sulfate dihydrate化学式
CAS
——
化学式
Ca*2H2O*O4S
mdl
——
分子量
172.172
InChiKey
ZHZFKLKREFECML-UHFFFAOYSA-L
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    -2.54
  • 重原子数:
    7
  • 可旋转键数:
    0
  • 环数:
    0.0
  • sp3杂化的碳原子比例:
    0.0
  • 拓扑面积:
    89.6
  • 氢给体数:
    1
  • 氢受体数:
    5

反应信息

  • 作为反应物:
    描述:
    calcium sulfate dihydrate 以 neat (no solvent) 为溶剂, 生成 三氧化硫
    参考文献:
    名称:
    Hedvall, J. A.; Aaberg, N.; Wiberg, N., Teknisk Tidskrift, 1942, vol. 72, p. 9 - 14
    摘要:
    DOI:
  • 作为产物:
    描述:
    sodium hydrogen sulfate 在 heavy metal sulfates 作用下, 以 为溶剂, 生成 calcium sulfate dihydrate
    参考文献:
    名称:
    Budnikow, P. P., Zeitschrift fur anorganische Chemie, 1926, vol. 155, p. 141 - 143
    摘要:
    DOI:
  • 作为试剂:
    描述:
    3,5-二甲氧基苯甲醛乙酰乙酸甲酯尿素calcium sulfate dihydrate 作用下, 反应 0.92h, 以82%的产率得到4-(3,5-dimethoxyphenyl)-5-methoxycarbonyl-6-methyl-3,4-dihydropyrimidin-2(1H)-one
    参考文献:
    名称:
    Gypsum-Catalyzed One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)Under Solvent-Free Conditions
    摘要:
    鉴于绿色化学原则在化工和制药行业中的日益重要性,我们在此披露了一种新的经济方法,利用无溶剂一锅法Biginelli缩合,在石膏存在下作为环保友好和可循环利用的催化剂,高产率地生产生物活性的二氢嘧啶酮。
    DOI:
    10.1155/2011/780271
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文献信息

  • Differential thermal analysis under quasi-isothermal, quasi-isobaric conditions (Q-DTA)
    作者:F. Paulik、E. Bessenyey-Paulik、K. Walther-Paulik
    DOI:10.1016/j.tca.2004.03.018
    日期:2004.12
    the transformation itself. This problem can be eliminated completely by the simultaneous use of “transformation-governed heating control” (TGHC) and “self-generated atmosphere” (SGA) ensuring quasi-isothermal, quasi-isobaric conditions for the DTA measuring technique (Q-DTA). This experience is proven on the examples of the evaporation of water under boiling, the dehydration of Ca(OH) 2 , CuSO 4 ·5H
    摘要 今天已经普遍接受的观点是,非等温加热控制和其他实验条件会导致 DTA、DSC 和 TG 曲线的恶化,以至于实验条件比实验条件更具特征性。转型本身。通过同时使用“转化控制加热控制”(TGHC) 和“自生气氛”(SGA),确保 DTA 测量技术 (Q-DTA) 的准等温、准等压条件,可以完全消除这个问题. 这种经验在沸腾蒸发、Ca(OH) 2 、CuSO 4 ·5H 2 O、CaBr 2 ·6H 2 O、Mg(OH) 2 和CaSO 4 ·2H 2 O 脱的例子中得到了证明通过同时提供 DTA、TG 和 Q-DTA 测量技术获得的结果。
  • Displacement reactions in gypsum and in anhydrite
    作者:G. Bayer、H.G. Wiedemann
    DOI:10.1016/0040-6031(87)80243-5
    日期:1987.4
    Abstract Displacement reactions between calcium sulfates (gypsum and anhydrite) and aqueous solutions of Ba − , Sr − and Pb-salts were investigated by means of TG, DSC,microscopy and x-ray. The reactions can be followed directly by microscopy when cleavage plates of gypsum crystals are used. The first steps of crystallization are in some cases of a topotactical nature. The results presented in this
    摘要 利用TG、DSC、显微镜和X射线研究了硫酸石膏硬石膏)与Ba - 、Sr - 和Pb-盐溶液之间的置换反应。当使用石膏晶体的裂解板时,可以通过显微镜直接跟踪反应。在某些情况下,结晶的第一步是拓扑性质的。本文提出的结果主要涉及在不同温度下通过置换反应形成重晶石、天青石和角矿。
  • Stepwise Assembly of Nanoparticles, ‐tubes, ‐rods, and ‐wires in Reverse Micelle Systems
    作者:Yun Chen、Qingsheng Wu、Yaping Ding
    DOI:10.1002/ejic.200700196
    日期:2007.11
    synthesis of CaSO4·2H2O nanoparticles, -tubes, -rods, and -wires. Sizes of these nanostructures vary from tens of nanometers to tens of microns. The key point of the stepwise-assembly process is the reaction time. The growth process was studied as a function of the reaction time and this was used to guide the synthesis of other one-dimensional nanomaterials in reverse micelle systems. The results showed
    CaSO4·2H2O 纳米颗粒、-管、-棒和-线的逐步组装合成采用了一种传统的简便方法。这些纳米结构的尺寸从几十纳米到几十微米不等。逐步组装过程的关键点是反应时间。生长过程被研究为反应时间的函数,这被用来指导反胶束系统中其他一维纳米材料的合成。结果表明,这种生长过程在反胶束体系中合成具有零/一维和实心/中空结构的无机盐方面具有一定的普遍性。还探索了生长机制,据信它是一种基于组装的生长,与表面活性剂模板机制相关并同时发生。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany,
  • Effect of Cu<sup>2+</sup> on the nucleation kinetics and crystallization of rod-shaped CaSO<sub>4</sub>·2H<sub>2</sub>O in aqueous solution
    作者:Xiangbin Sun、Xianshun Wang、Genlei Zhang、Peng Cui、Hao Shen
    DOI:10.1039/c9ra07640a
    日期:——
    respectively. The interfacial tension value (γ) in the aqueous solution is improved significantly with the assistance of Cu2+, yet the nucleation rate (J) of the DH crystal is decreased sharply. The interfacial tension value (γ) in the aqueous solution is improved and the nucleation rate (J) of the DH crystal is drastically decreased due to the introduction of Cu2+, leading to the induction time of the DH crystallization
    本研究以Cu 2+为改性剂,开发了一种简单有效的方法,在溶液中合成长宽比可调的棒状CaSO 4 ·2H 2 O (DH) 晶体。在Cu 2+的存在下,DH晶体的纵横比和长度分别有效地降低到5.7:1和约35 μm 。在Cu 2+的帮助下,溶液中的界面张力值(γ )显着提高,但DH晶体的成核率(J)急剧下降。溶液中的界面张力值(γ )提高,成核率( J由于Cu 2+的引入,DH 晶体的 ) 急剧下降,导致 DH 结晶的诱导时间从 4 分钟延长到 25 分钟。DH晶体形态的多样化是由成核动力学的变化和Cu 2+进入晶格引起的,影响晶体生长习性,最终控制DH晶体在溶液中的生长。
  • Method of decomposing raw phosphates
    申请人:KEMISKA PATENTER AB
    公开号:US02002547A1
    公开(公告)日:1935-05-28

    In the decomposition of raw phosphates with sulphuric acid, or with another acid with simultaneous or subsequent addition of the sulphuric acid radicle, the reaction mass is subjected to such a solution vapour pressure that the calcium sulphate present as semihydrate and/or anhydrite becomes sufficiently stable to permit washing or treatment with water, diluted phosphoric acid &;c. without substantial change of the contents of water of hydration. The heating may be carried out in the presence of added phosphoric acid or previously produced reaction mass containing it, and the required temperature may be ascertained from the relation 2p + t = at least 186, where p is the percentage of P2O5 by weight present, and t the temperature necessary. By having a sufficient concentration of phosphoric acid, the decomposition and stabilization may be carried out in an open vessel; for instance the phosphoric acid added may contain at least 36 per cent by weight of P2O5 and at least as much be added as is formed in the decomposition. The addition may be made to the raw phosphate and reaction be effected therewith prior to addition of sulphuric acid. In effecting decomposition with sulphuric acid, excess acid may first be used at the temperature of stabilization, and then further raw phosphate be added; or the excess sulphuric acid may be added to reaction mixture already produced, and the temperature be then raised to that necessary prior to addition of the further raw phosphate required. By applying the process to the direct formation of superphosphate, hardening during storage is prevented or retarded. Specification 314,976, [Class 1 (ii), Inorganic compounds, other than &;c.], is referred to.

    在用硫酸或其他酸分解原磷酸盐的过程中,或者在同时或随后加入硫酸根的情况下,反应物质受到溶液蒸气压的影响,使得存在的半石膏和/或无石膏足够稳定,可以在不实质改变合物含量的情况下进行洗或用、稀磷酸等处理。加热可以在添加磷酸或已经含有磷酸的反应物质存在的情况下进行,所需的温度可以根据2p + t = 至少186的关系确定,其中p是以重量计的P2O5百分比,t是所需的温度。通过具有足够浓度的磷酸,分解和稳定可以在开放容器中进行;例如,添加的磷酸可能含有至少36%的P2O5重量,并且至少添加的量与分解过程中形成的数量相同。这种添加可以在原磷酸盐中进行,并在添加硫酸之前进行反应。在用硫酸进行分解时,可以首先使用过量的酸在稳定温度下,然后再添加更多的原磷酸盐;或者过量的硫酸可以添加到已经产生的反应混合物中,然后将温度提高到必要的温度,然后再添加所需的更多原磷酸盐。通过将该过程应用于直接制备过磷酸盐,可以防止或延缓存储期间的硬化。参考专利规格314,976,[1类(ii),无机化合物,除外等等]。
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