阅读说明：本技术 一种复合生物脱脂剂及其应用 (Composite biological degreasing agent and application thereof ) 是由 严亚楠 许冰斌 刘淑萍 于 2020-06-02 设计创作，主要内容包括：本发明提供了一种复合生物脱脂剂及其应用,涉及皮革脱脂技术领域。本发明的复合生物脱脂剂包括如下重量份的组分：酸性脂肪酶15-35份；和表面活性剂10-25份。本发明的复合生物脱脂剂以酸性脂肪酶为主,能够利用酸性脂肪酶在酸性条件下降解油脂的作用和表面活性剂的乳化作用,在对酸皮和蓝湿皮进行补充脱脂处理时发挥生物法和化学法脱脂的协同作用,达到在酸性条件下高效脱脂的目的,从而使酸皮或蓝湿皮等皮胚满足后续制革加工的要求。(The invention provides a composite biological degreasing agent and application thereof, and relates to the technical field of leather degreasing. The composite biological degreasing agent comprises the following components in parts by weight: 15-35 parts of acid lipase; and 10-25 parts of a surfactant. The composite biological degreasing agent disclosed by the invention mainly uses the acid lipase, can utilize the oil degrading effect of the acid lipase under an acid condition and the emulsifying effect of the surfactant, and plays a synergistic effect of biological degreasing and chemical degreasing when performing supplementary degreasing treatment on acid leather and wet blue leather, so that the aim of efficiently degreasing under the acid condition is fulfilled, and thus, the blank of the acid leather or wet blue leather and the like can meet the requirement of subsequent tanning processing.)

1. The composite biological degreasing agent is characterized by comprising the following components in parts by weight:

15-35 parts of acid lipase; and

10-25 parts of a surfactant.

2. The complex biological degreaser of claim 1 wherein the surfactant is a non-ionic surfactant.

3. The complex biological degreaser of claim 2, wherein the non-ionic surfactant is selected from basf TO-8 or basf XL90 or AEO-9.

4. The complex biological degreasing agent as recited in claim 1, wherein the complex biological degreasing agent further comprises the following components in parts by weight:

0.1-1 part of enzyme activating property;

6-15 parts of an enzyme stabilizer;

1-5 parts of a pH stabilizer; and

0.1 part of preservative and the balance of water.

5. The complex biological degreaser of claim 4 wherein the enzyme activator is selected from calcium chloride.

6. The complex biological degreasing agent as recited in claim 4, wherein the enzyme stabilizer comprises propylene glycol and 4-formylphenylboronic acid, wherein the propylene glycol and the 4-formylphenylboronic acid account for the following weight parts in the complex biological degreasing agent: 5-10 parts of propylene glycol; 1-5 parts of 4-formylphenylboronic acid.

7. The complex biological degreaser of claim 4, wherein the pH stabilizer is selected from sodium citrate or sodium tripolyphosphate.

8. The complex biological degreaser of claim 4 wherein the preservative is selected from the group consisting of kason and BIT 20.

9. Use of the complex biological degreaser of any of claims 1 to 8, comprising a degreasing treatment for pickled or blue wet hides.

10. The use of claim 9, further comprising the complex biological degreaser degreasing the pickled or wet blue skin under acidic conditions.

Technical Field

The invention relates to the technical field of leather degreasing, in particular to a composite biological degreasing agent and application thereof.

Background

The leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and non-perishable. Degreasing is an essential process for processing leather or fur, and only natural grease contained in animal pelts is removed to a certain degree, the collagen fibers in the leather can be loosened, so that favorable conditions are created for smooth proceeding of various processes such as subsequent tanning and the like. However, for animal skins rich in oil, such as sheep skins, pigskins and the like, which have a large oil content, previous degreasing treatment usually cannot completely degrease, so that a large amount of unremoved oil is still contained in an embryo of the pickled skins and wet blue skins, and if the degreasing is not performed, the tanning processing quality is poor, such as the problems of oil frost on the surface of the leather, uneven dyeing and the like, so that the pickled skins and wet blue skins need to be subjected to the additional degreasing under an acidic condition.

The applicant has found that the prior art has at least the following technical problems: at present, a method for treating a leather blank in a sour leather and wet blue leather state is to use a large amount of surfactant for degreasing, but the large amount of surfactant used in the leather making process has great influence on environmental pollution. The lipase preparation adopted in the prior leather making is mainly degreased under neutral and alkaline conditions, and is not suitable for acid leather and wet blue leather. Although the acid lipase can meet the requirement of performing supplementary degreasing treatment on acid skins and wet blue skins under an acidic condition, the degreasing rate of the acid lipase used alone is not high.

Disclosure of Invention

In view of the above, the present invention aims to provide a composite biological degreasing agent and an application thereof. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a composite biological degreasing agent which comprises the following components in parts by weight:

15-35 parts of acid lipase; and

10-25 parts of a surfactant.

According to a preferred embodiment, the surfactant is a nonionic surfactant.

According TO a preferred embodiment, the nonionic surfactant is selected from the group consisting of basf TO-8 nonionic surfactants or basf XL90 nonionic surfactants or AEO-9 nonionic surfactants.

According to a preferred embodiment, the complex biological degreasing agent further comprises the following components in parts by weight:

0.1-1 part of enzyme activating property;

6-15 parts of an enzyme stabilizer;

1-5 parts of a pH stabilizer; and

0.1 part of preservative and the balance of water.

According to a preferred embodiment, the enzyme activator is selected from calcium chloride.

According to a preferred embodiment, the enzyme stabilizer comprises propylene glycol and 4-formylphenylboronic acid, wherein the propylene glycol and the 4-formylphenylboronic acid account for the following parts by weight in the composite biological degreasing agent: 5-10 parts of propylene glycol; 1-5 parts of 4-formylphenylboronic acid.

According to a preferred embodiment, the pH stabilizer is selected from sodium citrate or sodium tripolyphosphate.

According to a preferred embodiment, the preservative is selected from cason or BIT 20.

The invention also provides an application of the composite biological degreasing agent, which comprises the step of degreasing the pickled or blue wet skin.

According to a preferred embodiment, the application further comprises that the complex biological degreasing agent degreases pickled or wet blue skins under acidic conditions.

Based on the technical scheme, the composite biological degreasing agent and the application thereof at least have the following technical effects:

the compound biological degreasing agent mainly comprises 15-35 parts of acid lipase and 10-25 parts of surfactant, and the acid lipase is mainly used, so that the synergistic effect of biological degreasing and chemical degreasing can be exerted when supplementary degreasing treatment is carried out on acid skins and wet blue skins by utilizing the grease degrading effect of the acid lipase under an acid condition and the emulsifying effect of the surfactant, the purpose of efficient degreasing under the acid condition is achieved, and the blank of the acid skins or the wet blue skins meets the requirements of subsequent tanning processing.

On the other hand, the composite biological degreasing agent provided by the embodiment of the invention takes the surfactant as an auxiliary material, and reduces the dosage of the surfactant compared with a degreasing treatment method adopting a large amount of surfactant, thereby reducing the pollution to the environment in the leather treatment process.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention provides a composite biological degreasing agent, which comprises the following components in parts by weight:

15-35 parts of acid lipase; and

10-25 parts of a surfactant.

Preferably, the surfactant is a nonionic surfactant.

The acid lipase is a lipase which can stably and efficiently carry out the hydrolysis reaction of the grease in an acid environment. The composite biological degreasing agent disclosed by the invention takes acid lipase as a main component and takes a nonionic surfactant as an auxiliary component, redundant grease in acid skins or wet blue skins can be efficiently removed under an acidic condition, and compared with a large amount of surfactant used for degreasing treatment in the composite biological degreasing, the dosage of the surfactant is reduced. The applicant finds through experiments that the dosage of the nonionic surfactant in the composite biological degreasing agent can be relatively reduced by 25% -45% when the same degreasing effect is achieved compared with a degreasing process adopting the surfactant.

Preferably, the nonionic surfactant is selected from the group consisting of basf TO-8 nonionic surfactant or basf XL90 nonionic surfactant or AEO-9 nonionic surfactant. Preferably, the basf TO-8 nonionic surfactant, the basf XL90 nonionic surfactant, and the AEO-9 nonionic surfactant are all provided by basf (china) ltd.

Preferably, the composite biological degreasing agent further comprises the following components in parts by weight:

0.1-1 part of enzyme activating property; preferably, the enzyme activator is selected from calcium chloride.

6-15 parts of an enzyme stabilizer; preferably, the enzyme stabilizer comprises 5-10 parts of propylene glycol; 1-5 parts of 4-formylphenylboronic acid.

1-5 parts of a pH stabilizer; preferably, the pH stabilizer is selected from sodium citrate or sodium tripolyphosphate.

0.1 part of preservative, preferably, the preservative is selected from the group consisting of cason or BIT 20.

The balance of water.

The invention also provides an application of the composite biological degreasing agent, which comprises the step of degreasing the pickled or blue wet skin. Preferably, the complex biological degreasing agent degreases sour skins or wet blue skins under acidic conditions. Preferably, the complex biological degreaser of the present invention is suitable for acidic conditions with a pH of 3.5-4.0.

In order to further illustrate the technical solution of the present invention, the following embodiments are specifically described.