China Chengda Engineering Co., Ltd. has applied for a patent titled “A Cascade Acetylene Carbonylation Synthesis Method and System”
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According to news from April 4, 2025, **information from the Intellectual Property Office shows that China Chengda Engineering Co., Ltd. has filed a patent application titled “A Method and System for Serial Acetylene Carbonylation Synthesis,” with the publication number CN 119751236 A; the application was submitted in December 2024. The patent abstract indicates that this invention discloses a cascade acetylene carbonylation synthesis method and system, which falls within the field of chemical production technology. The method of the present invention employs a cascade reaction, comprising: S1. Primary reaction: In the primary reaction vessel, acetylene, carbon monoxide, and water react in a solvent under the catalysis of a catalyst system ； S2. Second-stage reaction: The reaction mixture from the first-stage reaction is transferred to a second-stage reaction vessel to continue the reaction, thereby producing crude succinic acid. The reaction system disclosed in this invention includes a primary reactor, a secondary reactor, and a crystallization solid-liquid separation unit connected in sequence ； The first-stage reactor is connected to a desalinated water supply line and an acetylene/carbon monoxide feed gas line, while the crystallization solid-liquid separation unit is equipped with a crude succinic acid product outlet line and a separated liquid outlet line. By employing a two-stage series reaction, this invention addresses the issues of numerous side reactions in the acetylene carbonylation process and short catalyst lifespan, enables complete recycling of the reaction mixture, and allows for long-term continuous operation of the production facility.
According to news on December 13, 2024, information from the National Intellectual Property Administration shows that China Chengda Engineering Co., Ltd. has been granted a patent titled “Fully automatic feeding device and fully automatic control system for a wet-process acetylene generator”. The patent’s authorization announcement number is CN 114736715 B, and the application was filed in April 2022.
According to news from December 19, 2024, **information from the Intellectual Property Office shows that China Chengda Engineering Co., Ltd. has obtained a patent titled “A guide plate structure for preheating air ducts in steam conversion furnaces,” with the approval announcement number CN 222164860 U. The application was filed in December 2023.** The patent abstract indicates that this utility model relates to air flow guidance technology in steam conversion furnaces, and more specifically to a guide plate structure for preheating air ducts in such furnaces. This guide plate structure consists of a plate body whose thickness decreases gradually from its head to its tail; the plate body is equipped with several pressure difference holes that connect its two sides, and the tail portion of the plate body features several toothed edges. Through modifications to the plate structure—specifically, by gradually varying its thickness and incorporating undulating patterns on its side surfaces—a streamlined structure that conforms to the flow of air is created. This structure helps reduce air resistance during actual operation, thereby minimizing friction and noise ； The pressure difference between the two surfaces is improved through pressure differential holes, preventing flutter of the plate body; this in turn reduces the disturbance caused by the plate body to the airflow and lowers energy consumption.
According to news from May 30, 2025, **information from the Intellectual Property Office shows that China Chengda Engineering Co., Ltd. has obtained a patent titled “A Safety Protection System for Calcium Carbide Silos,” with the approval announcement number CN111453232B; the application was filed in March 2020.
According to news from April 29, 2025, **information from the Intellectual Property Office shows that China Chengda Engineering Co., Ltd. has obtained a patent titled “A Construction Method for Preparing Holes for Equipment Foundation Bolts and the Related Structural Design,” with the approval number CN111519652B. The application was filed in June 2020.** According to Tianyancha, China Chengda Engineering Co., Ltd., founded in 1988 and located in Chengdu, is a company primarily engaged in the civil engineering sector. The registered capital of the company is 2,000 million RMB. According to the big data analysis conducted by Tianyancha, China Chengda Engineering Co., Ltd. has made investments in 10 companies in total and participated in 5,000 bidding projects. In terms of property-related information, it holds 2 trademark records and 627 patent records; furthermore, the company possesses 22 administrative licenses.
According to news from January 22, 2025, **information from the Intellectual Property Office shows that China Chengda Engineering Co., Ltd. has obtained a patent titled “A Prefabricated Roof Panel for Grid Structures and Related Components,” with the approval announcement number CN 222314355 U; the application was filed in December 2023. The patent abstract indicates that this utility model discloses a prefabricated grid roof panel and grid components, belonging to the field of building prefabricated components. The prefabricated grid roof panel includes a roof panel body, a edge rib beam frame located at the bottom edge of the roof panel body, and rib beam components placed inside the edge rib beam frame to support the roof panel body. Expansion positioning holes are provided at the corners of the edge rib beam frame to adjust the horizontal errors that occur during the installation of the grid nodes ； The truss components include truss support adjustment elements used to correct vertical errors that occur during the installation of truss nodes. In this utility model, the side rib beam framework is installed directly on the spherical supports at the upper chord nodes of the truss, eliminating the need for additional roof purlins or roof support beams, thereby saving costs ； Expanded positioning holes that are cast after installation are provided at the corners of the edge rib beam framework to address the horizontal errors in the installation of the grid node connections ； By installing grid support adjustment components at the upper chord ball bearings, the vertical errors in the installation of the grid nodes can be compensated for.
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