Sustainable recycling of wood chemical production wastes is one of the current issues of modern technology. As a by-product of the pulp and paper industry, tall oil pitch has found application as a potential source of phytosterols. Phytosterols or plant sterols are natural compounds, polycyclic...

The prohibition of drift floating used in the initial timber rafting led to an increase in the cost of supplying timber to consumers. Nowadays, the technology for rafting operations on small and medium-sized rivers is developing in two directions. The first is the use of bunches (micro-bundles) in...

The use of a mobile small-sized berth, the design of which was proposed by the authors in the previous paper, significantly increases capacity and reduces the cost of timber transshipment. When towing the berth over large distances, its ballast tanks are empty, which ensures that draft and water...

In order to provide accident free timber rafting on small and medium-sized rivers, it is necessary to consider in detail the features of ensuring the raft flexibility with all the necessary calculations. The research aims at developing an improved methodology for calculating the parameters that...

Organizational and engineering models provide a formalized description of the construction process, including a list of operations, their sequence, description of the relationship between the operations, and the features of the work technology. Network models have the most complete mathematical...

Microcrystalline cellulose (MCC) is a common product used in pharmaceutical, food and other industries. MCC is obtained by liquid-phase hydrolysis of cotton or wood bleached pulp with diluted 0.5-10.0% mineral acids at a temperature of 100-140°C. This process requires significant consumption of...

Preservation of wooden architecture monuments requires special attention since during their operation for 100 years and more wooden structures are exposed to environmental influences resulting in weakening their bearing capacity. The use of external reinforcement systems for buildings of historical ...

A method for homogeneous nitration of kraft lignin (KL), which consists in its treatment with acetyl nitrate in 1,4-dioxane, tetrahydrofuran, or dimethyl sulfoxide, has been proposed. The effects of reaction time and consumption of acetyl nitrate on KL nitration were studied. A new absorption band...

The working tool of machines with circular cutting units is a circular saw, the condition of which largely determines the quality of material processing. Circular saw blades in the process of operation are subjected to a complex effect of force and temperature factors that cause elongation and...

Currently, the main trend of the pulp and paper industry development is bio-refining. It is based on integrated and deep processing of wood raw materials to obtain products with higher value added and reduced amount of waste. One of the high priority tasks of bio-refining is improvement of...