Mechanism of Lamellarization and Growth Process of High Purity Boric Acid Crystals

doi:10.12422/j.issn.1672-6952.2026.02.002

Journal of Liaoning Petrochemical University ›› 2026, Vol. 46 ›› Issue (2): 14-21.DOI: 10.12422/j.issn.1672-6952.2026.02.002

• Chemistry and Chemical Engineering • Previous Articles Next Articles

Mechanism of Lamellarization and Growth Process of High Purity Boric Acid Crystals

Ningning WANG¹(), Jisheng LI¹, Longgang LI², Caixiong QUAN², Xin GUO³, Yufeng HU¹(), Jiazheng QIN²

^1.State Key Laboratory of Heavy Oil Processing，College of Chemical Engineering and Environment，China University of Petroleum （Beijing），Beijing 102249，China
^2.Sulfate?Type Salt Lake Resources Comprehensive Utilization Engineering Research Center，Qinghai CITIC Guoan Lithium Development Co. ，Ltd. ，Golmud Qinghai 816000，China
^3.School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

Received:2025-04-11 Revised:2025-06-18 Published:2026-04-25 Online:2026-04-21
Contact: Yufeng HU

高纯硼酸晶体片状化制备及相关机理

王宁宁¹(), 李积升¹, 李陇岗², 权彩兄², 国欣³, 胡玉峰¹(), 秦佳政²

^1.中国石油大学（北京）化学工程与环境学院重质油全国重点实验室，北京 102249
^2.青海中信国安锂业发展有限公司;硫酸盐型盐湖资源综合利用工程研究中心, 青海格尔木 816000
^3.辽宁石油化工大学石油化工学院，辽宁抚顺 113001

通讯作者: 胡玉峰
作者简介:王宁宁（2000-），女，硕士研究生，从事硼酸提取及形貌方面的研究；E⁃mail：17866701576@163.com。
基金资助:
青海省重点研发项目(2022?GX?152)

Abstract

Abstract:

Boric acid is an important chemical raw material, and the development of its lamellarization technology is crucial for enhancing its performance and broadening its application fields. In this study, based on the boric acid solution system purified by resin (LSI⁃020/010), the innovative introduction of sodium sulfate (Na2SO4) and magnesium sulfate (MgSO4) successfully induced the directional growth of boric acid crystals into a lamellar structure. The morphology characteristics of boric acid after additive incorporation was characterized using SEM. The effects of the introduction of MgSO4/Na2SO4 addition under weakly acidic conditions on the solubility of boric acid solution and the growth of crystal faces were analyzed by combining the COSMO⁃RS model and XRD. The interaction between MgSO4/Na2SO4 and boric acid crystals, as well as its impact on the B-O bond energy, was investigated using in⁃situ Raman spectroscopy. The results showed that boric acid exhibits a typical lamellar morphology after additive incorporation. The introduction of MgSO4/Na2SO4 under weakly acidic conditions significantly reduced the solubility of boric acid, promoting preferential crystal growth along the (002) and (004) planes. Moreover, the weak interaction between MgSO4/Na2SO4 and boric acid crystals reduces the B-O bond energy, which drove the growth of boric acid crystals towards lamellarisation. This study not only establishes a new boric acid lamellarization technology, but also elucidates the crystal growth mechanism at the molecular level, providing theoretical support for functionalized crystal engineering.

Key words: Boric acid lamellarization, High purity, Crystal growth, Process mechanism

摘要：

硼酸是重要的化工原料，其片状化技术的开发对提升产品性能与拓展应用领域具有关键意义。基于树脂（LSI⁃020/010）纯化的硼酸溶液体系，创新性地引入硫酸钠（Na2SO4）和硫酸镁（MgSO4），成功诱导硼酸晶体定向生长为片状结构；采用SEM表征添加助剂后硼酸的形貌特征，联用COSMO⁃RS模型与XRD分析了弱酸性条件下MgSO4/Na2SO4的引入对硼酸溶液溶解度及晶体晶面生长的影响，借助原位拉曼光谱探究了MgSO4/Na2SO4与硼酸晶体间的相互作用及其对B-O键能的影响。结果表明，添加助剂后的硼酸呈现典型片状形貌，弱酸性条件下MgSO4/Na2SO4的引入可显著降低硼酸在溶液中的溶解度、驱动晶体沿（002）、（004）晶面择优生长，且MgSO4/Na2SO4与硼酸晶体间的弱相互作用使B-O键能降低，推动硼酸晶体向片状化方向生长。该研究不仅建立了新型的高纯硼酸晶体片状化制备技术，更从分子层面阐释了其晶体生长调控机制，为功能化晶体工程的研究与应用提供了理论支撑。

关键词: 硼酸片状化, 高纯, 晶体生长, 过程机理

CLC Number:

TQ06

Ningning WANG, Jisheng LI, Longgang LI, Caixiong QUAN, Xin GUO, Yufeng HU, Jiazheng QIN. Mechanism of Lamellarization and Growth Process of High Purity Boric Acid Crystals[J]. Journal of Liaoning Petrochemical University, 2026, 46(2): 14-21.

王宁宁, 李积升, 李陇岗, 权彩兄, 国欣, 胡玉峰, 秦佳政. 高纯硼酸晶体片状化制备及相关机理[J]. 辽宁石油化工大学学报, 2026, 46(2): 14-21.

Figures/Tables 11

Fig.1 Preparation process of flaky H3BO3

Fig.2 SEM images of different H3BO3 crystals

Fig.3 AFM images of different H3BO3 crystals

Table 1 Surface roughness of different H3BO3 crystals

化合物	均方根粗糙度/nm	算术平均粗糙度/nm
H₃BO₃	68.50	31.90
H₃BO₃/MgSO₄	53.90	31.00
H₃BO₃/Na₂SO₄	47.70	21.00
H₃BO₃/MgSO₄/Na₂SO₄	41.80	20.30

Fig.4 Purity of flaky H3BO3 crystals with the introduction of additives Na2SO4 and MgSO4

Fig. 5 Particle size of flaky H3BO3 crystals with the introduction of Na2SO4 and MgSO4

Table 2 Mass fractions of H3BO3 and impurities in flaky H3BO3 crystals

H₃BO₃及杂质	质量分数（纯度）/%
H₃BO₃	99.99
Fe	0.03×10^-2
Ca²⁺	0.06×10^-2
As	<0.01×10^-2
Pb	<0.01×10^-2
Cl^-	0.02×10^-2
SO $4 2 -$	0.05×10^-2

Table 2 Mass fractions of H3BO3 and impurities in flaky H3BO3 crystals

H₃BO₃及杂质	质量分数（纯度）/%
H₃BO₃	99.99
Fe	0.03×10^-2
Ca²⁺	0.06×10^-2
As	<0.01×10^-2
Pb	<0.01×10^-2
Cl^-	0.02×10^-2
SO $4 2 -$	0.05×10^-2

Fig.6 XRD and Raman spectra of flaky H3BO3 crystals with and without additives MgSO4 and Na2SO4

Fig.7 COSMO?RS?predicted solubility of H3BO3 vs. mass fractions of additives MgSO4 and Na2SO4 at different temperatures

Fig.8 In situ Raman spectra of H3BO3 crystal growth process

Fig.9 Infrared spectra of flaky H3BO3 crystals

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Mechanism of Lamellarization and Growth Process of High Purity Boric Acid Crystals

高纯硼酸晶体片状化制备及相关机理

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