Digesting liquor for pulp and method for producing pulp

摘要

A digesting liquor for pulp, characterized in that when a standard chip is digested with the digesting liquor under a temperature profile predetermined for a standard digesting liquor at a liquor ratio of 3.0 L/kg (based on absolutely dried chip) to produce a pulp having a kappa value of 18, the standard chip being a wood chip providing a pulp having a kappa value of 18 in a yield of 50 to 51 % by using a standard digesting liquor having a specific composition under the same conditions and at the same liquor ratio as described above, an increase in yield by 3.5 % or more and a decrease in the ratio of addition of an active alkali to a pulp by 2 % or more are achieved; and a method for producing a pulp using the digesting liquor. The digesting liquor can be used for improving the relationship between a kappa value and a pulp yield, and also for reducing the amount of chemicals to be used and reducing the load on a boiler for recovery.