Location History:
- Xinchang, CN (2008)
- Zhejiang, CN (2014)
- Donglu, CN (2017)
- Xinchang County, CN (2013 - 2018)
- Shaoxing, CN (2024)
Company Filing History:
8 out of 33 
3 out of 6 
1 out of 1 Years Active: 2008-2024
Title: Xuejun Lao: Innovator in Pharmaceutical Extraction Methods
Introduction
Xuejun Lao is a notable inventor based in Xinchang County, China. He has made significant contributions to the field of pharmaceutical extraction, holding a total of 11 patents. His innovative methods focus on the extraction and purification of valuable compounds, showcasing his expertise in the industry.
Latest Patents
One of Xuejun Lao's latest patents is a method for extracting and isolating lutein crystal from vegetable oil resin containing lutein diester. This method involves dissolving lipase into deionized water to create an enzyme solution, followed by dissolving a lutein extract into an alcohol solvent. The enzyme solution is then added to the alcohol solution for hydrolysis, resulting in a lutein solution. The process includes filtering and isolating the crystalline, re-dissolving it into a non-polar organic solvent, and washing away water-soluble impurities. This environmentally friendly method is suitable for industrial production, yielding high-purity lutein crystals.
Another significant patent is the separation and purification method for vancomycin hydrochloride of high purity. This method begins with obtaining a vancomycin hydrochloride solution from a crude product through ion exchange chromatography. The concentrate is then adjusted with hydrochloric acid and subjected to column chromatography. The final steps involve dehydrating and drying the concentrate to produce a vancomycin dry powder with a chromatographic purity of up to 99%.
Career Highlights
Xuejun Lao has worked with several reputable companies, including Zhejiang Medicine Co., Ltd., Xinchang Pharmaceutical Factory, and Shaoxing University. His experience in these organizations has contributed to his development as an inventor and has allowed him to refine his innovative techniques.
Collaborations
Xuejun Lao has collaborated with notable colleagues such as Runpu Shen and Weidong Ye. Their combined expertise has likely enhanced the quality and impact of their work in the pharmaceutical field.
Conclusion
Xuejun Lao's contributions to pharmaceutical extraction methods demonstrate his commitment to innovation and environmental sustainability. His patents reflect a deep understanding of the complexities involved in extracting and purifying valuable compounds. His work continues to influence the industry positively.