In order to realize China people's dream of making caustic soda by themselves, uncover the secret of Sulvi process and break the blockade of foreigners, Hou devoted himself to the research and improvement of caustic soda process. After five years of hard exploration, he finally produced qualified soda ash at 1926. Shortly thereafter, China soda named "Red Triangle" won the gold medal at the World Expo held in Philadelphia, USA, and was praised as "the symbol of China's industrial progress". 1930 At the international commodity exhibition held in Switzerland, the "Red Triangle" won the gold medal again, enjoying a high reputation in Europe, Asia and the United States. 1937, War of Resistance against Japanese Aggression broke out and Wynn soda factory was forced to move to Sichuan. At that time, due to the high price of salt in the mainland, the cost of using the traditional Sulvi method was too high to maintain production. In order to find a soda production process suitable for mainland conditions, Wynn Company is going to buy a new technology-the patent of tea temple method from Germany, but Germany colludes with Japan in secret. In addition to extorting high prices from Hou and his party, they also demanded to humiliate the people of China. Hou, together with the engineers and technicians of Yongli Company, carefully analyzed the technology of tea-temple method, and finally determined a new alkali-making process with its own independent characteristics. In 194 1, this new process was named "Hou Shi Alkali Making Process".
The book The Manufacture of Soda Soda was published in the series of American Chemical Society in new york, 1933. This chemical masterpiece thoroughly reveals the secret of Sulvi's soda production for the first time, and is recognized as the authoritative monograph of soda production industry by the chemical circles all over the world. At the same time, it was translated into many languages and published, which played an important role in the development of soda production industry in the world. Professor Wilson of the United States called this book "the great contribution of China chemists to world civilization". Alkali-making Project is a work of Hou in his later years, and it is also a summary of his 40-year experience in alkali-making. The scientific level of the book is much higher than that of the book "soda ash manufacturing". This book systematically dedicates "Hou Shi Alkali Law" to readers, which has aroused strong repercussions in academic circles at home and abroad.