Catalyst as well as method and device for increasing content of geranialdehyde in citral

• Main Authors: LIU XUEDONG, QIU ANBIN, HUANG JINLONG, LIANG XINGHUA, XU LIXIN, HONG ZHILONG
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a catalyst, and a method and a device for increasing the content of geranial in citral, the catalyst is used for preparing geranial by isomerization of nerolaldehyde, and the catalyst is one or more of citric acid, tartaric acid, amino acid and malic acid. The method for increasing the content of geranial in citral comprises the step of adding the catalyst into citral. According to the method, one or more of citric acid, tartaric acid, amino acid and malic acid are selected as catalysts and added into citral or natural essential oil containing citral, so that nerolaldehyde in the raw materials is isomerized into geranial, the content of geranial in the raw materials is effectively increased, and the purity of the geranial in the raw materials is improved. Therefore, a citral product with higher geranialdehyde content and softer fragrance is obtained. The catalyst is directly added into the raw materials for reaction, the process is simple, the operation is simple and convenient, the t