A slurry catalyst, a preparation method and application thereof

Abstract

The application discloses a pulping catalyst, a preparation method and application thereof, and belongs to the field of papermaking technology. The pulping catalyst comprises 0.6-2.5 parts by mass of yeast, 1.0-85 parts by mass of a composite bulk agent and 0.4-23 parts by mass of an auxiliary agent. The components of the pulping catalyst are compounded according to a reasonable proportion, the role of each component can be maximally played, and the prepared catalyst has a synergistic effect. After the raw materials are washed and impurities are removed, the raw materials and the pulping catalyst are sequentially subjected to a pre-catalysis process, a filament separation process, a high-concentration grinder grinding process, a catalysis process, a screening process and a washing process, so that a finished product pulp is prepared. The pulping process is simple, the conditions are mild, the quality of the finished product pulp prepared by using the process is remarkably improved, the pulping yield is improved, large equipment such as a cooking device and an alkali recovery device is not needed in the process, a site is saved, and production cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of papermaking pulping, and particularly relates to a pulping catalyst, a preparation method and application thereof. BACKGROUND

[0002] The papermaking industry is one of important basic industries of the national economy in China, and belongs to the basic raw material industry. Paper is an indispensable basic material for industry, agriculture, science and technology, culture, life and military affairs. Meanwhile, the papermaking industry is a processing and manufacturing industry with high resource and energy consumption intensity, large pollutant output and serious environmental impact. In the papermaking process, a large amount of solid waste is generated in addition to a large amount of wastewater. With the gradual expansion of the industrial scale, the environmental impact of the solid waste is increasingly prominent. Under the condition that the demand for paper is still increasing, the papermaking industry needs to achieve the goal of carbon peak and carbon neutrality. Therefore, the existing technical equipment or process must have a major breakthrough. SUMMARY

[0003] In view of the above problems, the application provides a pulping catalyst, a preparation method and application thereof, which can catalyze pulping at normal temperature and normal pressure, reduce equipment investment, save production cost and reduce environmental pollution.

[0004] In order to solve the above technical problems, the application adopts the following technical scheme: a pulping catalyst, which comprises 0.6-2.5 parts by mass of yeast, 1.0-85 parts by mass of a composite bulk agent and 0.4-23 parts by mass of an auxiliary agent.

[0005] Preferably, the pulping catalyst comprises 1.0-2.5 parts by mass of yeast, 35-85 parts by mass of a composite bulk agent and 5-13.5 parts by mass of an auxiliary agent; further preferably, 1.5-2.5 parts by mass of yeast, 76-85 parts by mass of a composite bulk agent and 10-12.5 parts by mass of an auxiliary agent.

[0006] In the application, the main function of the yeast is to degrade pectin in the cell wall, xylan, starch and intercellular substance. During fermentation, the amylase in the yeast first catalyzes the starch in the plant into sugar, and then makes the sugar generate carbon dioxide. The carbon dioxide expands under heat in the pulping process, so that plant cellulose, hemicellulose, lignin, pectin, tannin and other substances produce many dense small pores, which is beneficial to the rapid entry of the auxiliary agent into the cell wall of the plant, accelerates the conversion efficiency of the plant raw material to cellulose, and lays a solid foundation for obtaining high-quality pulp.

[0007] Preferably, the composite swelling agent comprises an alkaline swelling agent and an acid swelling agent, and the mass ratio of the alkaline swelling agent and the acid swelling agent is 3:2; the main function of the composite swelling agent is to destroy the plant cell wall and make the cell contents fully release; in the pulping process, the composite swelling agent is decomposed by heat to generate a large amount of gas (carbon dioxide), so that the cellulose, hemicellulose and lignin in the plant fully expand to form a dense porous state, thereby swelling the cellulose and making the substances in the auxiliary agent quickly enter the cell wall of the plant, greatly improving the pulping efficiency.

[0008] Preferably, the alkaline swelling agent is selected from one or a combination of several of sodium bicarbonate, ammonium bicarbonate, potassium bicarbonate, light calcium carbonate, corn starch and white sugar; further preferably, the alkaline swelling agent comprises the following components: 1-2 parts by mass of sodium bicarbonate, 0-2 parts by mass of ammonium bicarbonate, 0-2 parts by mass of potassium bicarbonate, 0-2 parts by mass of light calcium carbonate, 0-1.5 parts by mass of corn starch and 0-1 part by mass of white sugar.

[0009] Preferably, the acid swelling agent is selected from one or a combination of several of sodium pyrophosphate, sodium tripolyphosphate, sodium dihydrogen pyrophosphate, calcium hydrogen phosphate, alum and potassium tartrate; further preferably, the acid swelling agent comprises the following components: 0-1.5 parts by mass of sodium pyrophosphate, 0-1.5 parts by mass of sodium tripolyphosphate, 0-1.5 parts by mass of sodium dihydrogen pyrophosphate, 0.5-2 parts by mass of calcium hydrogen phosphate, 0-2 parts by mass of alum and 0.5-2 parts by mass of potassium tartrate.

[0010] Preferably, the auxiliary agent is selected from one or a combination of several of sodium metasilicate, sodium silicate, sodium dodecyl benzene sulfonate, anhydrous sodium sulfite, sodium dodecyl sulfate, urea and ferrous sulfate; further preferably, the auxiliary agent comprises the following components: 0-2 parts by mass of sodium metasilicate, 0-1.5 parts by mass of sodium silicate, 0.5-1 part by mass of sodium dodecyl benzene sulfonate, 1-1.5 parts of anhydrous sodium sulfite, 0-1.5 parts by mass of sodium dodecyl sulfate, 0-1.5 parts of urea and 0.5-1.0 parts by mass of ferrous sulfate.

[0011] The reasonable compounding of the auxiliary agents according to the proportions can better play the role of each auxiliary agent, improve the catalytic efficiency and product quality, and the roles of the components in the auxiliary agent are as follows:

[0012] Sodium metasilicate has strong wetting, emulsifying, dispersing and saponifying effects on the pulping raw materials containing fat (such as pine turpentine of pine wood); and can effectively remove iron salts in water and complex calcium and magnesium ions, and has the effect of softening the water used for pulping in a certain sense.

[0013] The sodium silicate prevents the oxidation agent in part of the auxiliary agent from reacting with the pulping equipment in the pulping process, affecting the pulping effect, and can also disperse and remove the pigment (tannin) and resin in the pulping raw material.

[0014] The sodium dodecyl benzene sulfonate has neutral PH, is not easy to be oxidized, is easy to be compounded with various auxiliary agents, has good surface activity, strong hydrophilicity, has emulsifying effect, and has significant dirt removing effect on the dirt particles on the pulping fiber.

[0015] The anhydrous sodium sulfite can prevent the partial oxidation of the paper pulp fiber, thereby affecting the strength of the fiber, and can also be used as a lignin removing agent, a fiber stabilizer, a preservative and a loosening agent, and has the effect of improving the whiteness of the paper pulp.

[0016] The sodium dodecyl sulfate has good emulsifying property, water solubility, alkali resistance, hard water resistance, biodegradability, can stably play a role in a wide range of PH value aqueous solution, and can also make the dirt particles on the pulping fiber cell membrane disintegrate, combine with the hydrophobic part of the membrane protein and separate from the membrane, thereby playing a role in removing dirt.

[0017] The urea has strong hygroscopicity, and in the pulping process, the hygroscopicity, swelling property, puffing property, reducing property and antioxidant property of the urea are mainly utilized, and the urea also has the effects of dissolving the pigment produced in the pulping process and removing nitrite, thereby providing guarantee for the long-term use of the pulping circulating water.

[0018] The sodium hydrosulfite has bleaching effect, and the paper pulp treated by the sodium hydrosulfite does not contain heavy metal, has bright color, is not easy to fade and deteriorate.

[0019] Preferably, the pulping catalyst can also selectively add a bleaching agent according to needs, and the bleaching agent can be one or more selected from the group consisting of bleaching agent, chlorine dioxide, hydrogen peroxide and sodium hypochlorite.

[0020] Another object of the present application is to provide a preparation method of the pulping catalyst.

[0021] (1) According to the formula requirements, the components of the alkaline bulking agent are weighed respectively, mixed uniformly and reserved;

[0022] (2) According to the formula requirements, the components of the acid bulking agent are weighed respectively, mixed uniformly and reserved;

[0023] (3) The alkaline bulking agent and the acid bulking agent are mixed and stirred uniformly according to the proportion to prepare a composite bulking agent;

[0024] (4) According to the formula requirements, the auxiliary agents are weighed respectively, mixed uniformly and reserved;

[0025] (5) According to the formula, the composite bulking agent, auxiliary agent and yeast are mixed uniformly to obtain the pulping catalyst.

[0026] Another object of the present application is to provide a method for pulping using the pulping catalyst, comprising the following steps:

[0027] a. A certain amount of raw material is weighed, impurities in the raw material are removed by a cylindrical sieve, and then the raw material is washed by a washing machine, and then dehydrated after washing;

[0028] b. The pulping catalyst is weighed and diluted, and then added to the pre-catalytic reactor together with the dehydrated raw material in step a, and pre-catalytic reaction is carried out for 60-90 minutes to obtain a pre-catalytic reaction product;

[0029] c. The pre-catalytic reaction product prepared in step b is treated by a filament separator and then fed into a high-concentration grinder to produce a fiberized pulp;

[0030] d. The fiberized pulp prepared in step c is fed into a catalytic reactor, and catalytic reaction is carried out for 90-120 minutes to produce a crude pulp;

[0031] e. The crude pulp is screened, impurities are removed by washing and dehydrated to produce a finished pulp.

[0032] Preferably, the mass ratio of the pulping catalyst to the raw material is (0.5-3.5):100, and the mass ratio of the raw material to water is 1:(1.5-3.5).

[0033] Further preferably, the amount of the pulping catalyst varies for different raw materials, and the specific amount is as follows:

[0034] For grass raw materials, the mass ratio of the pulping catalyst to the raw material is (0.5-1.8):100;

[0035] For wood raw materials, the mass ratio of the pulping catalyst to the raw material is (1.0-3.5):100;

[0036] For cotton raw materials, the mass ratio of the pulping catalyst to the raw material is (1.5-2.2):100;

[0037] For bast raw materials, the mass ratio of the pulping catalyst to the raw material is (1.5-2.8):100.

[0038] Preferably, the product after the filament separator in step c has a diameter of 15-23 mm and a length of 35-42 mm.

[0039] Preferably, in order to accelerate the reaction speed and improve the product quality, the slurry is circulated in the medium consistency grinder for 1 to 2 times during the catalytic reaction process; specifically, the fiberized slurry prepared in step c is delivered into the catalytic reactor, and after 60 minutes of catalytic reaction, the slurry is taken out and ground in the medium consistency grinder, then the slurry is delivered back into the catalytic reactor for continuous reaction for 30 to 60 minutes, and finally the slurry is delivered into the medium consistency grinder for grinding, thereby preparing the crude slurry.

[0040] Preferably, according to the product quality requirements, the crude slurry prepared in step d can be bleached; specifically, the crude slurry is delivered into the low consistency reactor, and a bleaching agent is added into the low consistency reactor for bleaching treatment; the bleaching agent can be selected from one of sodium hypochlorite and chlorine dioxide.

[0041] Compared with the prior art, the present application has the following beneficial effects:

[0042] The present application has the most suitable enzyme activity reaction temperature for the pulping catalyst, good thermal stability, and fast reaction speed;

[0043] The pulping catalyst of the present application is compounded by yeast, composite bulk agent and auxiliary agent in a reasonable proportion, so that the functions of each component can be maximized, and the prepared catalyst has a synergistic effect;

[0044] The components of the pulping catalyst of the present application are clear, and the action sites are known, so that the generation of by-products and unexpected reactions can be effectively prevented;

[0045] The pulping catalyst of the present application can play a role under normal temperature and pressure conditions, can significantly reduce the viscosity of the reaction body and the power consumption cost in the production process, and can effectively prevent bacterial contamination, improve the quality of the product, and is beneficial to the production of the later process;

[0046] The pulping catalyst of the present application has good pushability, long half-life of enzymes, and can effectively reduce the usage amount;

[0047] In some cases, the pulping catalyst of the present application can improve the solubility of the reaction substrate, reduce the reaction volume, and simplify the process operation conditions;

[0048] The pulping catalyst of the present application is environmentally friendly, inexpensive, and various raw materials are available, and the preparation is convenient, easy to store, transport, and use, and the pulping catalyst can be applied to pulping of various raw materials, and has a wide range of applications;

[0049] The quality of the finished pulp prepared by using the pulping catalyst of the present application is significantly improved, the pulping yield is improved, and large equipment such as cooking equipment and alkali recovery equipment is not required during the pulping process using the pulping catalyst, thereby saving the site and greatly reducing the production cost. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described below in combination with specific examples.

[0051] Example 1

[0052] Preparation of the pulping catalyst according to the present application:

[0053] (1) 2 parts by mass of sodium bicarbonate, 2 parts by mass of ammonium bicarbonate, 2 parts by mass of potassium bicarbonate, 2 parts by mass of light calcium carbonate, 1.5 parts by mass of corn starch and 0.5 parts by mass of white sugar were weighed respectively and mixed uniformly to prepare a basic bulk agent for standby;

[0054] (2) 1.5 parts by mass of sodium pyrophosphate, 1.5 parts by mass of sodium tripolyphosphate, 1.5 parts by mass of sodium dihydrogen pyrophosphate, 1.5 parts by mass of calcium hydrogen phosphate, 1.5 parts by mass of white vitriol and 1.5 parts by mass of potassium tartrate were weighed respectively and mixed uniformly to prepare an acidic bulk agent for standby;

[0055] (3) The above-mentioned basic bulk agent and acidic bulk agent were mixed uniformly at a mass ratio of 3:2 to prepare a composite bulk agent for standby;

[0056] (4) 2 parts by mass of sodium metasilicate, 1.5 parts by mass of sodium silicate, 1 part by mass of sodium dodecylbenzenesulfonate, 1.5 parts by mass of anhydrous sodium sulfite, 1.5 parts by mass of sodium dodecyl sulfate, 1.5 parts by mass of urea and 1 part by mass of sodium hydrosulfite were weighed respectively and mixed uniformly to prepare an auxiliary agent for standby;

[0057] (5) 1.5 parts by mass of yeast, 85 parts by mass of the composite bulk agent and 10 parts by mass of the auxiliary agent were mixed uniformly to prepare the pulping catalyst according to the present application.

[0058] Example 2

[0059] Preparation of the pulping catalyst according to the present application:

[0060] (1) 2 parts by mass of sodium bicarbonate, 2 parts by mass of ammonium bicarbonate, 2 parts by mass of potassium bicarbonate, 2 parts by mass of light calcium carbonate, 1.5 parts by mass of corn starch and 0.5 parts by mass of white sugar were weighed respectively and mixed uniformly to prepare a basic bulk agent for standby;

[0061] (2) 1 part by mass of sodium pyrophosphate, 1 part by mass of sodium tripolyphosphate, 0.5 parts by mass of sodium dihydrogen pyrophosphate, 0.5 parts by mass of calcium hydrogen phosphate and 1 part by mass of potassium tartrate were weighed respectively and mixed uniformly to prepare an acidic bulk agent for standby;

[0062] (3) The above-mentioned basic bulk agent and acidic bulk agent were mixed uniformly at a mass ratio of 3:2 to prepare a composite bulk agent for standby;

[0063] (4) Respectively take 1.5 parts by mass of sodium metasilicate, 1.5 parts by mass of sodium silicate, 1.5 parts by mass of sodium dodecylbenzenesulfonate, 2 parts by mass of anhydrous sodium sulfite, 1.5 parts by mass of sodium dodecyl sulfate, 1 part by mass of urea, 1 part by mass of sodium hydrosulfite, mix uniformly to prepare an auxiliary agent for standby;

[0064] (5) Respectively take 2 parts by mass of yeast, 76 parts by mass of a composite leavening agent, 11 parts by mass of an auxiliary agent, mix uniformly to prepare the pulp preparation catalyst.

[0065] Example 3

[0066] Preparation of the pulp preparation catalyst:

[0067] (1) Respectively take 2 parts by mass of sodium bicarbonate, 2 parts by mass of ammonium bicarbonate, 2 parts by mass of potassium bicarbonate, 2 parts by mass of light calcium carbonate, 1 part by mass of corn starch, 1 part by mass of white sugar, mix uniformly to prepare an alkaline leavening agent for standby;

[0068] (2) Respectively take 1.5 parts by mass of sodium pyrophosphate, 1.5 parts by mass of sodium tripolyphosphate, 1.5 parts by mass of sodium dihydrogen pyrophosphate, 2 parts by mass of calcium hydrogen phosphate; 1.5 parts by mass of white vitriol, 1.5 parts by mass of potassium tartrate, mix uniformly to prepare an acidic leavening agent for standby;

[0069] (3) Mix the above-mentioned alkaline leavening agent and acidic leavening agent uniformly according to the mass ratio of 3:2 to prepare a composite leavening agent for standby;

[0070] (4) Respectively take 2 parts by mass of sodium metasilicate, 1.5 parts by mass of sodium silicate, 1.5 parts by mass of anhydrous sodium sulfite, 1 part by mass of sodium dodecyl sulfate, 1 part by mass of sodium hydrosulfite, mix uniformly to prepare an auxiliary agent for standby;

[0071] (5) Respectively take 2.5 parts by mass of yeast, 83 parts by mass of a composite leavening agent, 13 parts by mass of an auxiliary agent, mix uniformly to prepare the pulp preparation catalyst.

[0072] Example 4

[0073] Preparation of the pulp preparation catalyst:

[0074] (1) Respectively take 1.5 parts by mass of sodium bicarbonate, 0.5 parts by mass of calcium hydrogen phosphate and 0.5 parts by mass of potassium tartrate, mix uniformly to prepare a composite leavening agent;

[0075] (2) Respectively take 1.5 parts by mass of sodium metasilicate, 1.5 parts by mass of anhydrous sodium sulfite, 1 part by mass of sodium dodecyl sulfate, 1 part by mass of urea, 1 part by mass of sodium hydrosulfite, mix uniformly to prepare an auxiliary agent for standby;

[0076] (3) 2.5 parts by mass of the yeast, 35 parts by mass of the compound leavening agent, and 12.5 parts by mass of the auxiliary agent are mixed to prepare the pulping catalyst.

[0077] Example 5

[0078] Using pine wood as raw material to make pulp:

[0079] a. 1000 kg of wood chip raw material is weighed, and the impurities in the raw material are removed by using a cylindrical sieve separator, and then washed by using a wood chip washing machine. After washing, the water is removed;

[0080] b. 15 kg of the pulping catalyst prepared in Example 1 is weighed and added to a stirring dilution tank. After dilution with 1500 kg of clean water, it is then added to the pre-catalytic reactor together with the dehydrated raw material in step a above. Finally, 2500 kg of clean water is added to the catalytic reactor, and the pre-catalytic reaction is carried out for 60-90 min to obtain a pre-catalytic reaction product with saturated moisture content of the wood chips;

[0081] c. The pre-catalytic reaction product prepared in step b is subjected to a silk separation machine to obtain a product with a diameter of 15-23 mm and a length of 35-42 mm. Then it is transported to a high-concentration grinder for grinding to obtain a fiberized pulp;

[0082] d. The fiberized pulp is transported to the catalytic reactor, and after 60 min of catalytic reaction, it is removed to a medium-concentration grinder for grinding. Then the pulp is transported back to the catalytic reactor for continuous reaction for 30-60 min, and finally transported to the medium-concentration grinder for further grinding to obtain the crude pulp.

[0083] e. The crude pulp is screened, washed, and dehydrated to obtain the finished product.

[0084] Example 6

[0085] Using pine wood as raw material to make pulp, the difference from Example 5 is that the pulping catalyst used in step b is prepared according to Example 2, and the amount of the pulping catalyst used is 25 kg.

[0086] Example 7

[0087] Using pine wood as raw material to make pulp, the difference from Example 5 is that the pulping catalyst used in step b is prepared according to Example 3, and the amount of the pulping catalyst used is 35 kg.

[0088] Example 8

[0089] Using pine wood as raw material to make pulp, the difference from Example 5 is that the pulping catalyst used in step b is prepared according to Example 4.

[0090] Comparative Example 1

[0091] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0092] Comparative Example 2

[0093] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0094] Comparative Example 3

[0095] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0096] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0097] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0098] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0099] The difference between Example 5 and the present application is that the mass ratio of the acid swelling agent to the basic swelling agent in the composite swelling agent used in the pulping catalyst of step b is 2:3.

[0100] Table 1: Quality detection results of the paper pulp prepared in the examples and comparative examples

[0101]

[0102] As shown in Table 1, the quality indicators of the paper pulp prepared by using the pulping catalyst described in the present application are all better than those of the comparative examples, which indicates that the pulping catalyst described in the present application can significantly improve the quality of the paper pulp.

[0103] Compared with the traditional process, the process described in the present application does not require a cooking device and has a short process flow, which greatly saves the production cost. According to the specification of 100 tons of paper pulp per day, the cost comparison between the traditional alkali pulping method and the process described in the present application is as follows:

[0104] Table 2: Cost comparison between the traditional alkali pulping method and the process described in the present application

[0105] Compared with the traditional process, the process described in the present application does not require a cooking device and has a short process flow, which greatly saves the production cost. According to the specification of 100 tons of paper pulp per day, the cost comparison between the traditional alkali pulping method and the process described in the present application is as follows:

[0106] As shown in Table 2, the process flow is short, no need of cooking equipment, alkali recovery and sewage treatment, the site and equipment investment are saved, the process can be completed at normal temperature and pressure, no need of large power equipment, the electricity and water charges are reduced, therefore, the production cost is greatly saved by using the pulping catalyst.

[0107] The above-mentioned examples only express certain embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A slurry-making catalyst characterized by, The compound leavening agent comprises 0.6-2.5 parts by mass of yeast, 1.0-85 parts by mass of a compound leavening agent, and 0.4-23 parts by mass of an auxiliary agent; The compound leavening agent comprises an alkaline leavening agent and an acidic leavening agent, and the mass ratio of the alkaline leavening agent to the acidic leavening agent in the compound leavening agent is 3:2; The alkaline leavening agent is composed of 1-2 parts by mass of sodium bicarbonate, 0-2 parts by mass of ammonium bicarbonate, 0-2 parts by mass of potassium bicarbonate, 0-2 parts by mass of light calcium carbonate, 0-1.5 parts by mass of corn starch, and 0-1 part by mass of white sugar; The acidic leavening agent is composed of 0-1.5 parts by mass of sodium pyrophosphate, 0-1.5 parts by mass of sodium tripolyphosphate, 0-1.5 parts by mass of sodium dihydrogen pyrophosphate, 0.5-2 parts by mass of calcium hydrogen phosphate, 0-2 parts by mass of white vitriol, and 0.5-2 parts by mass of potassium tartrate; The auxiliary agent is composed of 1.5-2 parts by mass of sodium metasilicate, 0-1.5 parts by mass of sodium silicate, 0.5-1 part by mass of sodium dodecylbenzenesulfonate, 1-1.5 parts by mass of anhydrous sodium sulfite, 1-1.5 parts by mass of sodium dodecyl sulfate, 0-1.5 parts by mass of urea, and 0.5-1.0 parts by mass of saltpeter.

2. A process for the preparation of the slurry catalyst of claim 1, characterized in that, The method comprises the following steps: (1) According to the formula requirements, the components of the alkaline leavening agent are weighed and mixed uniformly for standby; (2) According to the formula requirements, the components of the acidic leavening agent are weighed and mixed uniformly for standby; (3) The alkaline leavening agent and the acidic leavening agent are mixed and stirred uniformly according to the proportion to obtain the compound leavening agent; (4) According to the formula requirements, the auxiliary agents are weighed and mixed uniformly for standby; (5) According to the formula requirements, the compound leavening agent, the auxiliary agents, and the yeast are mixed uniformly to obtain the pulp-making catalyst.

3. A process for slurry making using the slurry making catalyst of claim 1, characterized by, The method comprises the following steps: a. A certain amount of raw materials is weighed, impurities in the raw materials are removed by using a cylinder sieve, and then the raw materials are washed by using a washing machine, and then the raw materials are dehydrated after washing; b. The pulp-making catalyst is weighed, diluted with water, and then added to the pre-catalytic reactor together with the dehydrated raw materials in step a, pre-catalytic reaction is performed for 60-90 minutes to obtain a pre-catalytic reaction product; c. The pre-catalytic reaction product obtained in step b is subjected to a splitting machine for splitting treatment, and then is conveyed to a high-consistency grinder for grinding to obtain a fiberized pulp; d. The fiberized pulp obtained in step c is conveyed to a catalytic reactor, and catalytic reaction is performed for 90-120 minutes to obtain a crude pulp; e. The crude pulp obtained in step d is subjected to screening, washing and impurity removal, and dehydration in sequence to obtain a finished product.

4. The pulping process of claim 3, wherein, The mass ratio of the pulp-making catalyst to the raw materials is (0.5-3.5):100, and the mass ratio of the raw materials to water is 1:(1.5-3.5).

5. The pulping process of claim 3 wherein, The product after splitting treatment in step c has a diameter of 15-23 mm and a length of 35-42 mm.

6. The pulping process of claim 3 wherein, In step d, in order to accelerate the reaction speed and improve the product quality, the medium-consistency grinder needs to be used for recycling grinding once or twice during the catalytic reaction.

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