Preparation method of hexagonal columnar L-cystine crystal and product thereof

• Main Authors: ZHAO DESHENG, SUN BENJING, ZHANG JIANNING, ZHAO FULIN, LU BOWEN, ZHANG LIMING
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a hexagonal columnar L-cystine crystal preparation method, which comprises: S1, preparing L-cystine into an L-cystine solution, adding an oxidizing agent, adding a pH value adjusting agent to adjust the pH value to an isoelectric point, and filtering to obtain an L-cystine crude product; and S2, washing, filtering and drying the L-cystine crude product to obtain the hexagonal columnar L-cystine crystal. The invention discloses a crystallization process of L-cystine, an L-cystine crystal with a hexagonal columnar structure can be prepared through a specific crystallization process, so that the stacking density of the L-cystine crystal is remarkably improved, and the L-cystine crystal with the specific crystal habit is easier to dry, stronger in anti-shearing force and more difficult to break. 本发明公开了一种六边形柱状L-胱氨酸晶体的制备方法，包括如下步骤：S1.将L-胱氨酸配制成L-胱氨酸溶液，加入氧化剂，并加入pH调节剂调节pH值到等电点，经过滤后得到L-胱氨酸粗品；S2.将所述L-胱氨酸粗品进行洗涤、过滤、干燥后得到所述六边形柱状L-胱氨酸晶体。本发明公开了一种L-胱氨酸的结晶工艺，通过特定的结晶工艺可制备得到具有六边形柱状结构的L-胱氨酸晶体，从而显著提高L-胱氨酸晶体的